Java 在单个活动中动态实现多个片段我正在研究碎片_Java_Android_Xml_Android Fragments

Java 在单个活动中动态实现多个片段我正在研究碎片

java android xml android-fragments

Java 在单个活动中动态实现多个片段我正在研究碎片,java,android,xml,android-fragments,Java,Android,Xml,Android Fragments,我正在尝试实现的用例：我使用的是动态片段我在一个活动中使用了三个片段我的目标是在所有三个片段之间进行通信我正在使用片段支持包每个片段都有一个小部件 my_fragment1具有edittext my_fragment2有按钮 my_fragment3具有TextView 单击按钮时，编辑文本中的文本必须显示在文本视图到目前为止，我已经构建了以下大部分场景 Top\u Fragment.java public class Top_Fragment extends Fra

我正在尝试实现的用例：

我使用的是动态片段
我在一个活动中使用了三个片段
我的目标是在所有三个片段之间进行通信
我正在使用片段支持包

每个片段都有一个小部件

```
my_fragment1
```
具有
```
edittext
```
```
my_fragment2
```
有
```
按钮
```
```
my_fragment3
```
具有
```
TextView
```

单击

按钮

时，编辑文本中的文本必须显示在

文本视图

到目前为止，我已经构建了以下大部分场景

Top\u Fragment.java

public class Top_Fragment extends Fragment{

    @Override
    public View onCreateView(LayoutInflater inflater, ViewGroup container,
            Bundle savedInstanceState) {
        // TODO Auto-generated method stub

        View view=inflater.inflate(R.layout.my_fragment1, container, false);

        return view;
    }
}

package com.example.deleteme;

import android.os.Bundle;
import android.support.v4.app.Fragment;
import android.view.LayoutInflater;
import android.view.View;
import android.view.View.OnClickListener;
import android.view.ViewGroup;
import android.widget.Button;

public class Middle_Fragment extends Fragment{

    View view;
    Button btn;

    @Override
    public View onCreateView(LayoutInflater inflater, ViewGroup container,
            Bundle savedInstanceState) {
        // TODO Auto-generated method stub

        view=inflater.inflate(R.layout.my_fragment2, container, false);
        btn=(Button) view.findViewById(R.id.button1);
        btn.setOnClickListener(new OnClickListener() {

            @Override
            public void onClick(View v) {
                // TODO Auto-generated method stub



            }
        });
        return view;
    }
}

public class Bottom_Fragment extends Fragment{

    View view;
    TextView display_text;

    @Override
    public View onCreateView(LayoutInflater inflater, ViewGroup container,
            Bundle savedInstanceState) {
        // TODO Auto-generated method stub
        view=inflater.inflate(R.layout.my_fragment3, container,false);
        display_text=(TextView) view.findViewById(R.id.editText1);
        return view;
    }

    public void setName(String Name){
        display_text.setText("Result::" + Name);
    }



}

public class MainActivity extends FragmentActivity {

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);

        Top_Fragment frg=new Top_Fragment();//create the fragment instance for the top fragment
        Middle_Fragment frg1=new Middle_Fragment();//create the fragment instance for the middle fragment
        Bottom_Fragment frg2=new Bottom_Fragment();//create the fragment instance for the bottom fragment

        FragmentManager manager=getSupportFragmentManager();//create an instance of fragment manager

        FragmentTransaction transaction=manager.beginTransaction();//create an instance of Fragment-transaction

        transaction.add(R.id.My_Container_1_ID, frg, "Frag_Top_tag");
        transaction.add(R.id.My_Container_2_ID, frg1, "Frag_Middle_tag");
        transaction.add(R.id.My_Container_3_ID, frg2, "Frag_Bottom_tag");


        transaction.commit();

    }


}

package com.example.amaanmemon.testfragment;

interface Communicate {
 public void sendData();
}

package com.example.amaanmemon.testfragment;
import android.support.v4.app.Fragment;
import android.os.Bundle;
import android.view.LayoutInflater;
import android.view.View;
import android.view.ViewGroup;
import android.widget.EditText;

public class TopFragment extends Fragment {

EditText  firstName;
@Override
public View onCreateView(LayoutInflater inflater, ViewGroup container,
                         Bundle savedInstanceState) {
    // TODO Auto-generated method stub

    View view=inflater.inflate(R.layout.my_fragment1, container, false);
    return view;
}

public void onActivityCreated(Bundle savedInstanceState) {
    // TODO Auto-generated method stub
    super.onActivityCreated(savedInstanceState);
    firstName = (EditText) getActivity().findViewById(R.id.editText1);
}

public String getData(){
    return firstName.getText().toString();
}
}

package com.example.amaanmemon.testfragment;

import android.os.Bundle;
import android.support.v4.app.Fragment;
import android.view.LayoutInflater;
import android.view.View;
import android.view.View.OnClickListener;
import android.view.ViewGroup;
import android.widget.Button;

public class MiddleFragment extends Fragment implements OnClickListener{

View view;
Button btn;
Communicate cm;

@Override
public View onCreateView(LayoutInflater inflater, ViewGroup container,
                         Bundle savedInstanceState) {
    // TODO Auto-generated method stub
    view=inflater.inflate(R.layout.my_fragment2, container, false);
    return  view;
}

@Override
public void onActivityCreated(Bundle savedInstanceState) {
    // TODO Auto-generated method stub
    super.onActivityCreated(savedInstanceState);
    cm = (Communicate) getActivity();
    btn = (Button) getActivity().findViewById(R.id.button1);
    btn.setOnClickListener(this);
}

@Override
public void onClick(View arg0) {
    // TODO Auto-generated method stub
    cm.sendData();
}
}

package com.example.amaanmemon.testfragment;

import android.os.Bundle;
import android.support.v4.app.Fragment;
import android.view.LayoutInflater;
import android.view.View;
import android.view.View.OnClickListener;
import android.view.ViewGroup;
import android.widget.Button;
import android.widget.TextView;

public class BottomFragment extends Fragment{

int count;
View view;
TextView display_text;

@Override
public View onCreateView(LayoutInflater inflater, ViewGroup container,
                         Bundle savedInstanceState) {
    // TODO Auto-generated method stub
    view=inflater.inflate(R.layout.my_fragment3, container,false);
    return view;
}

@Override
public void onActivityCreated(Bundle savedInstanceState) {
    // TODO Auto-generated method stub
    super.onActivityCreated(savedInstanceState);
    display_text = (TextView)getActivity().findViewById(R.id.textView1);
}

public void incrementData(String displayText){
    display_text.setText(displayText);
}
}

package com.example.amaanmemon.testfragment;

import android.support.v4.app.FragmentActivity;
import android.os.Bundle;
import android.support.v4.app.FragmentManager;
import android.support.v4.app.FragmentTransaction;

public class MainActivity extends FragmentActivity implements Communicate{

TopFragment frg;
MiddleFragment frg1;
BottomFragment frg2;
FragmentTransaction transaction;

@Override
protected void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    setContentView(R.layout.activity_main);

    frg = new TopFragment();
    frg1 = new MiddleFragment();
    frg2 = new BottomFragment();

    FragmentManager manager=getSupportFragmentManager();
    transaction=manager.beginTransaction();
    transaction.add(R.id.My_Container_1_ID, frg, "Frag_Top_tag");
    transaction.add(R.id.My_Container_2_ID, frg1, "Frag_Middle_tag");
    transaction.add(R.id.My_Container_3_ID, frg2, "Frag_Bottom_tag");
    transaction.commit();
}

@Override
public void sendData() {
    String temp = frg.getData();
    frg2.incrementData(temp);
}
}

Middle_Fragment.java

public class Top_Fragment extends Fragment{

    @Override
    public View onCreateView(LayoutInflater inflater, ViewGroup container,
            Bundle savedInstanceState) {
        // TODO Auto-generated method stub

        View view=inflater.inflate(R.layout.my_fragment1, container, false);

        return view;
    }
}

package com.example.deleteme;

import android.os.Bundle;
import android.support.v4.app.Fragment;
import android.view.LayoutInflater;
import android.view.View;
import android.view.View.OnClickListener;
import android.view.ViewGroup;
import android.widget.Button;

public class Middle_Fragment extends Fragment{

    View view;
    Button btn;

    @Override
    public View onCreateView(LayoutInflater inflater, ViewGroup container,
            Bundle savedInstanceState) {
        // TODO Auto-generated method stub

        view=inflater.inflate(R.layout.my_fragment2, container, false);
        btn=(Button) view.findViewById(R.id.button1);
        btn.setOnClickListener(new OnClickListener() {

            @Override
            public void onClick(View v) {
                // TODO Auto-generated method stub



            }
        });
        return view;
    }
}

public class Bottom_Fragment extends Fragment{

    View view;
    TextView display_text;

    @Override
    public View onCreateView(LayoutInflater inflater, ViewGroup container,
            Bundle savedInstanceState) {
        // TODO Auto-generated method stub
        view=inflater.inflate(R.layout.my_fragment3, container,false);
        display_text=(TextView) view.findViewById(R.id.editText1);
        return view;
    }

    public void setName(String Name){
        display_text.setText("Result::" + Name);
    }



}

public class MainActivity extends FragmentActivity {

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);

        Top_Fragment frg=new Top_Fragment();//create the fragment instance for the top fragment
        Middle_Fragment frg1=new Middle_Fragment();//create the fragment instance for the middle fragment
        Bottom_Fragment frg2=new Bottom_Fragment();//create the fragment instance for the bottom fragment

        FragmentManager manager=getSupportFragmentManager();//create an instance of fragment manager

        FragmentTransaction transaction=manager.beginTransaction();//create an instance of Fragment-transaction

        transaction.add(R.id.My_Container_1_ID, frg, "Frag_Top_tag");
        transaction.add(R.id.My_Container_2_ID, frg1, "Frag_Middle_tag");
        transaction.add(R.id.My_Container_3_ID, frg2, "Frag_Bottom_tag");


        transaction.commit();

    }


}

package com.example.amaanmemon.testfragment;

interface Communicate {
 public void sendData();
}

package com.example.amaanmemon.testfragment;
import android.support.v4.app.Fragment;
import android.os.Bundle;
import android.view.LayoutInflater;
import android.view.View;
import android.view.ViewGroup;
import android.widget.EditText;

public class TopFragment extends Fragment {

EditText  firstName;
@Override
public View onCreateView(LayoutInflater inflater, ViewGroup container,
                         Bundle savedInstanceState) {
    // TODO Auto-generated method stub

    View view=inflater.inflate(R.layout.my_fragment1, container, false);
    return view;
}

public void onActivityCreated(Bundle savedInstanceState) {
    // TODO Auto-generated method stub
    super.onActivityCreated(savedInstanceState);
    firstName = (EditText) getActivity().findViewById(R.id.editText1);
}

public String getData(){
    return firstName.getText().toString();
}
}

package com.example.amaanmemon.testfragment;

import android.os.Bundle;
import android.support.v4.app.Fragment;
import android.view.LayoutInflater;
import android.view.View;
import android.view.View.OnClickListener;
import android.view.ViewGroup;
import android.widget.Button;

public class MiddleFragment extends Fragment implements OnClickListener{

View view;
Button btn;
Communicate cm;

@Override
public View onCreateView(LayoutInflater inflater, ViewGroup container,
                         Bundle savedInstanceState) {
    // TODO Auto-generated method stub
    view=inflater.inflate(R.layout.my_fragment2, container, false);
    return  view;
}

@Override
public void onActivityCreated(Bundle savedInstanceState) {
    // TODO Auto-generated method stub
    super.onActivityCreated(savedInstanceState);
    cm = (Communicate) getActivity();
    btn = (Button) getActivity().findViewById(R.id.button1);
    btn.setOnClickListener(this);
}

@Override
public void onClick(View arg0) {
    // TODO Auto-generated method stub
    cm.sendData();
}
}

package com.example.amaanmemon.testfragment;

import android.os.Bundle;
import android.support.v4.app.Fragment;
import android.view.LayoutInflater;
import android.view.View;
import android.view.View.OnClickListener;
import android.view.ViewGroup;
import android.widget.Button;
import android.widget.TextView;

public class BottomFragment extends Fragment{

int count;
View view;
TextView display_text;

@Override
public View onCreateView(LayoutInflater inflater, ViewGroup container,
                         Bundle savedInstanceState) {
    // TODO Auto-generated method stub
    view=inflater.inflate(R.layout.my_fragment3, container,false);
    return view;
}

@Override
public void onActivityCreated(Bundle savedInstanceState) {
    // TODO Auto-generated method stub
    super.onActivityCreated(savedInstanceState);
    display_text = (TextView)getActivity().findViewById(R.id.textView1);
}

public void incrementData(String displayText){
    display_text.setText(displayText);
}
}

package com.example.amaanmemon.testfragment;

import android.support.v4.app.FragmentActivity;
import android.os.Bundle;
import android.support.v4.app.FragmentManager;
import android.support.v4.app.FragmentTransaction;

public class MainActivity extends FragmentActivity implements Communicate{

TopFragment frg;
MiddleFragment frg1;
BottomFragment frg2;
FragmentTransaction transaction;

@Override
protected void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    setContentView(R.layout.activity_main);

    frg = new TopFragment();
    frg1 = new MiddleFragment();
    frg2 = new BottomFragment();

    FragmentManager manager=getSupportFragmentManager();
    transaction=manager.beginTransaction();
    transaction.add(R.id.My_Container_1_ID, frg, "Frag_Top_tag");
    transaction.add(R.id.My_Container_2_ID, frg1, "Frag_Middle_tag");
    transaction.add(R.id.My_Container_3_ID, frg2, "Frag_Bottom_tag");
    transaction.commit();
}

@Override
public void sendData() {
    String temp = frg.getData();
    frg2.incrementData(temp);
}
}

Bottom_Fragment.java

public class Top_Fragment extends Fragment{

    @Override
    public View onCreateView(LayoutInflater inflater, ViewGroup container,
            Bundle savedInstanceState) {
        // TODO Auto-generated method stub

        View view=inflater.inflate(R.layout.my_fragment1, container, false);

        return view;
    }
}

package com.example.deleteme;

import android.os.Bundle;
import android.support.v4.app.Fragment;
import android.view.LayoutInflater;
import android.view.View;
import android.view.View.OnClickListener;
import android.view.ViewGroup;
import android.widget.Button;

public class Middle_Fragment extends Fragment{

    View view;
    Button btn;

    @Override
    public View onCreateView(LayoutInflater inflater, ViewGroup container,
            Bundle savedInstanceState) {
        // TODO Auto-generated method stub

        view=inflater.inflate(R.layout.my_fragment2, container, false);
        btn=(Button) view.findViewById(R.id.button1);
        btn.setOnClickListener(new OnClickListener() {

            @Override
            public void onClick(View v) {
                // TODO Auto-generated method stub



            }
        });
        return view;
    }
}

public class Bottom_Fragment extends Fragment{

    View view;
    TextView display_text;

    @Override
    public View onCreateView(LayoutInflater inflater, ViewGroup container,
            Bundle savedInstanceState) {
        // TODO Auto-generated method stub
        view=inflater.inflate(R.layout.my_fragment3, container,false);
        display_text=(TextView) view.findViewById(R.id.editText1);
        return view;
    }

    public void setName(String Name){
        display_text.setText("Result::" + Name);
    }



}

public class MainActivity extends FragmentActivity {

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);

        Top_Fragment frg=new Top_Fragment();//create the fragment instance for the top fragment
        Middle_Fragment frg1=new Middle_Fragment();//create the fragment instance for the middle fragment
        Bottom_Fragment frg2=new Bottom_Fragment();//create the fragment instance for the bottom fragment

        FragmentManager manager=getSupportFragmentManager();//create an instance of fragment manager

        FragmentTransaction transaction=manager.beginTransaction();//create an instance of Fragment-transaction

        transaction.add(R.id.My_Container_1_ID, frg, "Frag_Top_tag");
        transaction.add(R.id.My_Container_2_ID, frg1, "Frag_Middle_tag");
        transaction.add(R.id.My_Container_3_ID, frg2, "Frag_Bottom_tag");


        transaction.commit();

    }


}

package com.example.amaanmemon.testfragment;

interface Communicate {
 public void sendData();
}

package com.example.amaanmemon.testfragment;
import android.support.v4.app.Fragment;
import android.os.Bundle;
import android.view.LayoutInflater;
import android.view.View;
import android.view.ViewGroup;
import android.widget.EditText;

public class TopFragment extends Fragment {

EditText  firstName;
@Override
public View onCreateView(LayoutInflater inflater, ViewGroup container,
                         Bundle savedInstanceState) {
    // TODO Auto-generated method stub

    View view=inflater.inflate(R.layout.my_fragment1, container, false);
    return view;
}

public void onActivityCreated(Bundle savedInstanceState) {
    // TODO Auto-generated method stub
    super.onActivityCreated(savedInstanceState);
    firstName = (EditText) getActivity().findViewById(R.id.editText1);
}

public String getData(){
    return firstName.getText().toString();
}
}

package com.example.amaanmemon.testfragment;

import android.os.Bundle;
import android.support.v4.app.Fragment;
import android.view.LayoutInflater;
import android.view.View;
import android.view.View.OnClickListener;
import android.view.ViewGroup;
import android.widget.Button;

public class MiddleFragment extends Fragment implements OnClickListener{

View view;
Button btn;
Communicate cm;

@Override
public View onCreateView(LayoutInflater inflater, ViewGroup container,
                         Bundle savedInstanceState) {
    // TODO Auto-generated method stub
    view=inflater.inflate(R.layout.my_fragment2, container, false);
    return  view;
}

@Override
public void onActivityCreated(Bundle savedInstanceState) {
    // TODO Auto-generated method stub
    super.onActivityCreated(savedInstanceState);
    cm = (Communicate) getActivity();
    btn = (Button) getActivity().findViewById(R.id.button1);
    btn.setOnClickListener(this);
}

@Override
public void onClick(View arg0) {
    // TODO Auto-generated method stub
    cm.sendData();
}
}

package com.example.amaanmemon.testfragment;

import android.os.Bundle;
import android.support.v4.app.Fragment;
import android.view.LayoutInflater;
import android.view.View;
import android.view.View.OnClickListener;
import android.view.ViewGroup;
import android.widget.Button;
import android.widget.TextView;

public class BottomFragment extends Fragment{

int count;
View view;
TextView display_text;

@Override
public View onCreateView(LayoutInflater inflater, ViewGroup container,
                         Bundle savedInstanceState) {
    // TODO Auto-generated method stub
    view=inflater.inflate(R.layout.my_fragment3, container,false);
    return view;
}

@Override
public void onActivityCreated(Bundle savedInstanceState) {
    // TODO Auto-generated method stub
    super.onActivityCreated(savedInstanceState);
    display_text = (TextView)getActivity().findViewById(R.id.textView1);
}

public void incrementData(String displayText){
    display_text.setText(displayText);
}
}

package com.example.amaanmemon.testfragment;

import android.support.v4.app.FragmentActivity;
import android.os.Bundle;
import android.support.v4.app.FragmentManager;
import android.support.v4.app.FragmentTransaction;

public class MainActivity extends FragmentActivity implements Communicate{

TopFragment frg;
MiddleFragment frg1;
BottomFragment frg2;
FragmentTransaction transaction;

@Override
protected void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    setContentView(R.layout.activity_main);

    frg = new TopFragment();
    frg1 = new MiddleFragment();
    frg2 = new BottomFragment();

    FragmentManager manager=getSupportFragmentManager();
    transaction=manager.beginTransaction();
    transaction.add(R.id.My_Container_1_ID, frg, "Frag_Top_tag");
    transaction.add(R.id.My_Container_2_ID, frg1, "Frag_Middle_tag");
    transaction.add(R.id.My_Container_3_ID, frg2, "Frag_Bottom_tag");
    transaction.commit();
}

@Override
public void sendData() {
    String temp = frg.getData();
    frg2.incrementData(temp);
}
}

MainActivity.java

public class Top_Fragment extends Fragment{

    @Override
    public View onCreateView(LayoutInflater inflater, ViewGroup container,
            Bundle savedInstanceState) {
        // TODO Auto-generated method stub

        View view=inflater.inflate(R.layout.my_fragment1, container, false);

        return view;
    }
}

package com.example.deleteme;

import android.os.Bundle;
import android.support.v4.app.Fragment;
import android.view.LayoutInflater;
import android.view.View;
import android.view.View.OnClickListener;
import android.view.ViewGroup;
import android.widget.Button;

public class Middle_Fragment extends Fragment{

    View view;
    Button btn;

    @Override
    public View onCreateView(LayoutInflater inflater, ViewGroup container,
            Bundle savedInstanceState) {
        // TODO Auto-generated method stub

        view=inflater.inflate(R.layout.my_fragment2, container, false);
        btn=(Button) view.findViewById(R.id.button1);
        btn.setOnClickListener(new OnClickListener() {

            @Override
            public void onClick(View v) {
                // TODO Auto-generated method stub



            }
        });
        return view;
    }
}

public class Bottom_Fragment extends Fragment{

    View view;
    TextView display_text;

    @Override
    public View onCreateView(LayoutInflater inflater, ViewGroup container,
            Bundle savedInstanceState) {
        // TODO Auto-generated method stub
        view=inflater.inflate(R.layout.my_fragment3, container,false);
        display_text=(TextView) view.findViewById(R.id.editText1);
        return view;
    }

    public void setName(String Name){
        display_text.setText("Result::" + Name);
    }



}

public class MainActivity extends FragmentActivity {

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);

        Top_Fragment frg=new Top_Fragment();//create the fragment instance for the top fragment
        Middle_Fragment frg1=new Middle_Fragment();//create the fragment instance for the middle fragment
        Bottom_Fragment frg2=new Bottom_Fragment();//create the fragment instance for the bottom fragment

        FragmentManager manager=getSupportFragmentManager();//create an instance of fragment manager

        FragmentTransaction transaction=manager.beginTransaction();//create an instance of Fragment-transaction

        transaction.add(R.id.My_Container_1_ID, frg, "Frag_Top_tag");
        transaction.add(R.id.My_Container_2_ID, frg1, "Frag_Middle_tag");
        transaction.add(R.id.My_Container_3_ID, frg2, "Frag_Bottom_tag");


        transaction.commit();

    }


}

package com.example.amaanmemon.testfragment;

interface Communicate {
 public void sendData();
}

package com.example.amaanmemon.testfragment;
import android.support.v4.app.Fragment;
import android.os.Bundle;
import android.view.LayoutInflater;
import android.view.View;
import android.view.ViewGroup;
import android.widget.EditText;

public class TopFragment extends Fragment {

EditText  firstName;
@Override
public View onCreateView(LayoutInflater inflater, ViewGroup container,
                         Bundle savedInstanceState) {
    // TODO Auto-generated method stub

    View view=inflater.inflate(R.layout.my_fragment1, container, false);
    return view;
}

public void onActivityCreated(Bundle savedInstanceState) {
    // TODO Auto-generated method stub
    super.onActivityCreated(savedInstanceState);
    firstName = (EditText) getActivity().findViewById(R.id.editText1);
}

public String getData(){
    return firstName.getText().toString();
}
}

package com.example.amaanmemon.testfragment;

import android.os.Bundle;
import android.support.v4.app.Fragment;
import android.view.LayoutInflater;
import android.view.View;
import android.view.View.OnClickListener;
import android.view.ViewGroup;
import android.widget.Button;

public class MiddleFragment extends Fragment implements OnClickListener{

View view;
Button btn;
Communicate cm;

@Override
public View onCreateView(LayoutInflater inflater, ViewGroup container,
                         Bundle savedInstanceState) {
    // TODO Auto-generated method stub
    view=inflater.inflate(R.layout.my_fragment2, container, false);
    return  view;
}

@Override
public void onActivityCreated(Bundle savedInstanceState) {
    // TODO Auto-generated method stub
    super.onActivityCreated(savedInstanceState);
    cm = (Communicate) getActivity();
    btn = (Button) getActivity().findViewById(R.id.button1);
    btn.setOnClickListener(this);
}

@Override
public void onClick(View arg0) {
    // TODO Auto-generated method stub
    cm.sendData();
}
}

package com.example.amaanmemon.testfragment;

import android.os.Bundle;
import android.support.v4.app.Fragment;
import android.view.LayoutInflater;
import android.view.View;
import android.view.View.OnClickListener;
import android.view.ViewGroup;
import android.widget.Button;
import android.widget.TextView;

public class BottomFragment extends Fragment{

int count;
View view;
TextView display_text;

@Override
public View onCreateView(LayoutInflater inflater, ViewGroup container,
                         Bundle savedInstanceState) {
    // TODO Auto-generated method stub
    view=inflater.inflate(R.layout.my_fragment3, container,false);
    return view;
}

@Override
public void onActivityCreated(Bundle savedInstanceState) {
    // TODO Auto-generated method stub
    super.onActivityCreated(savedInstanceState);
    display_text = (TextView)getActivity().findViewById(R.id.textView1);
}

public void incrementData(String displayText){
    display_text.setText(displayText);
}
}

package com.example.amaanmemon.testfragment;

import android.support.v4.app.FragmentActivity;
import android.os.Bundle;
import android.support.v4.app.FragmentManager;
import android.support.v4.app.FragmentTransaction;

public class MainActivity extends FragmentActivity implements Communicate{

TopFragment frg;
MiddleFragment frg1;
BottomFragment frg2;
FragmentTransaction transaction;

@Override
protected void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    setContentView(R.layout.activity_main);

    frg = new TopFragment();
    frg1 = new MiddleFragment();
    frg2 = new BottomFragment();

    FragmentManager manager=getSupportFragmentManager();
    transaction=manager.beginTransaction();
    transaction.add(R.id.My_Container_1_ID, frg, "Frag_Top_tag");
    transaction.add(R.id.My_Container_2_ID, frg1, "Frag_Middle_tag");
    transaction.add(R.id.My_Container_3_ID, frg2, "Frag_Bottom_tag");
    transaction.commit();
}

@Override
public void sendData() {
    String temp = frg.getData();
    frg2.incrementData(temp);
}
}

活动\u main.xml

<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
    xmlns:tools="http://schemas.android.com/tools"
    android:layout_width="fill_parent"
    android:layout_height="fill_parent"
    tools:context=".MainActivity" 
    android:background="@color/black">

    <FrameLayout
        android:id="@+id/My_Container_1_ID"
        android:layout_width="fill_parent"
        android:layout_height="150dp" 
        android:background="@color/yellow">
    </FrameLayout>

    <FrameLayout
        android:id="@+id/My_Container_2_ID"
        android:layout_width="fill_parent"
        android:layout_height="150dp"
        android:layout_alignParentLeft="true"
        android:layout_below="@+id/My_Container_1_ID"
        android:background="@color/Orange" >
    </FrameLayout>

    <FrameLayout
        android:id="@+id/My_Container_3_ID"
        android:layout_width="fill_parent"
        android:layout_height="150dp"
        android:layout_alignParentLeft="true"
        android:layout_below="@+id/My_Container_2_ID"
        android:background="@color/purple" >
    </FrameLayout>

</RelativeLayout>

<?xml version="1.0" encoding="utf-8"?>
<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
    android:layout_width="fill_parent"
    android:layout_height="fill_parent"
    android:background="@color/green" >

    <EditText
        android:id="@+id/editText1"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_centerHorizontal="true"
        android:layout_centerVertical="true"
        android:ems="10"
        android:textColor="#000000"
        android:singleLine="true" >

        <requestFocus />
    </EditText>

</RelativeLayout>

<?xml version="1.0" encoding="utf-8"?>
<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    android:orientation="vertical" 
    android:background="@color/pink">

    <Button
        android:id="@+id/button1"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_centerHorizontal="true"
        android:layout_centerVertical="true"
        android:background="@color/black"
        android:text="Button"
        android:textColor="#FFFFFF" />

</RelativeLayout>

<?xml version="1.0" encoding="utf-8"?>
<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
    android:layout_width="match_parent"
    android:layout_height="match_parent" >

    <TextView
        android:id="@+id/textView1"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_centerHorizontal="true"
        android:layout_centerVertical="true"
        android:text="TextView"
        android:textColor="#000000"
        android:textSize="30dp" />

</RelativeLayout>

my_fragment1.xml

<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
    xmlns:tools="http://schemas.android.com/tools"
    android:layout_width="fill_parent"
    android:layout_height="fill_parent"
    tools:context=".MainActivity" 
    android:background="@color/black">

    <FrameLayout
        android:id="@+id/My_Container_1_ID"
        android:layout_width="fill_parent"
        android:layout_height="150dp" 
        android:background="@color/yellow">
    </FrameLayout>

    <FrameLayout
        android:id="@+id/My_Container_2_ID"
        android:layout_width="fill_parent"
        android:layout_height="150dp"
        android:layout_alignParentLeft="true"
        android:layout_below="@+id/My_Container_1_ID"
        android:background="@color/Orange" >
    </FrameLayout>

    <FrameLayout
        android:id="@+id/My_Container_3_ID"
        android:layout_width="fill_parent"
        android:layout_height="150dp"
        android:layout_alignParentLeft="true"
        android:layout_below="@+id/My_Container_2_ID"
        android:background="@color/purple" >
    </FrameLayout>

</RelativeLayout>

<?xml version="1.0" encoding="utf-8"?>
<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
    android:layout_width="fill_parent"
    android:layout_height="fill_parent"
    android:background="@color/green" >

    <EditText
        android:id="@+id/editText1"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_centerHorizontal="true"
        android:layout_centerVertical="true"
        android:ems="10"
        android:textColor="#000000"
        android:singleLine="true" >

        <requestFocus />
    </EditText>

</RelativeLayout>

<?xml version="1.0" encoding="utf-8"?>
<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    android:orientation="vertical" 
    android:background="@color/pink">

    <Button
        android:id="@+id/button1"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_centerHorizontal="true"
        android:layout_centerVertical="true"
        android:background="@color/black"
        android:text="Button"
        android:textColor="#FFFFFF" />

</RelativeLayout>

<?xml version="1.0" encoding="utf-8"?>
<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
    android:layout_width="match_parent"
    android:layout_height="match_parent" >

    <TextView
        android:id="@+id/textView1"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_centerHorizontal="true"
        android:layout_centerVertical="true"
        android:text="TextView"
        android:textColor="#000000"
        android:textSize="30dp" />

</RelativeLayout>

my_fragment2.xml

<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
    xmlns:tools="http://schemas.android.com/tools"
    android:layout_width="fill_parent"
    android:layout_height="fill_parent"
    tools:context=".MainActivity" 
    android:background="@color/black">

    <FrameLayout
        android:id="@+id/My_Container_1_ID"
        android:layout_width="fill_parent"
        android:layout_height="150dp" 
        android:background="@color/yellow">
    </FrameLayout>

    <FrameLayout
        android:id="@+id/My_Container_2_ID"
        android:layout_width="fill_parent"
        android:layout_height="150dp"
        android:layout_alignParentLeft="true"
        android:layout_below="@+id/My_Container_1_ID"
        android:background="@color/Orange" >
    </FrameLayout>

    <FrameLayout
        android:id="@+id/My_Container_3_ID"
        android:layout_width="fill_parent"
        android:layout_height="150dp"
        android:layout_alignParentLeft="true"
        android:layout_below="@+id/My_Container_2_ID"
        android:background="@color/purple" >
    </FrameLayout>

</RelativeLayout>

<?xml version="1.0" encoding="utf-8"?>
<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
    android:layout_width="fill_parent"
    android:layout_height="fill_parent"
    android:background="@color/green" >

    <EditText
        android:id="@+id/editText1"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_centerHorizontal="true"
        android:layout_centerVertical="true"
        android:ems="10"
        android:textColor="#000000"
        android:singleLine="true" >

        <requestFocus />
    </EditText>

</RelativeLayout>

<?xml version="1.0" encoding="utf-8"?>
<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    android:orientation="vertical" 
    android:background="@color/pink">

    <Button
        android:id="@+id/button1"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_centerHorizontal="true"
        android:layout_centerVertical="true"
        android:background="@color/black"
        android:text="Button"
        android:textColor="#FFFFFF" />

</RelativeLayout>

<?xml version="1.0" encoding="utf-8"?>
<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
    android:layout_width="match_parent"
    android:layout_height="match_parent" >

    <TextView
        android:id="@+id/textView1"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_centerHorizontal="true"
        android:layout_centerVertical="true"
        android:text="TextView"
        android:textColor="#000000"
        android:textSize="30dp" />

</RelativeLayout>

my_fragment3.xml

<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
    xmlns:tools="http://schemas.android.com/tools"
    android:layout_width="fill_parent"
    android:layout_height="fill_parent"
    tools:context=".MainActivity" 
    android:background="@color/black">

    <FrameLayout
        android:id="@+id/My_Container_1_ID"
        android:layout_width="fill_parent"
        android:layout_height="150dp" 
        android:background="@color/yellow">
    </FrameLayout>

    <FrameLayout
        android:id="@+id/My_Container_2_ID"
        android:layout_width="fill_parent"
        android:layout_height="150dp"
        android:layout_alignParentLeft="true"
        android:layout_below="@+id/My_Container_1_ID"
        android:background="@color/Orange" >
    </FrameLayout>

    <FrameLayout
        android:id="@+id/My_Container_3_ID"
        android:layout_width="fill_parent"
        android:layout_height="150dp"
        android:layout_alignParentLeft="true"
        android:layout_below="@+id/My_Container_2_ID"
        android:background="@color/purple" >
    </FrameLayout>

</RelativeLayout>

<?xml version="1.0" encoding="utf-8"?>
<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
    android:layout_width="fill_parent"
    android:layout_height="fill_parent"
    android:background="@color/green" >

    <EditText
        android:id="@+id/editText1"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_centerHorizontal="true"
        android:layout_centerVertical="true"
        android:ems="10"
        android:textColor="#000000"
        android:singleLine="true" >

        <requestFocus />
    </EditText>

</RelativeLayout>

<?xml version="1.0" encoding="utf-8"?>
<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    android:orientation="vertical" 
    android:background="@color/pink">

    <Button
        android:id="@+id/button1"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_centerHorizontal="true"
        android:layout_centerVertical="true"
        android:background="@color/black"
        android:text="Button"
        android:textColor="#FFFFFF" />

</RelativeLayout>

<?xml version="1.0" encoding="utf-8"?>
<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
    android:layout_width="match_parent"
    android:layout_height="match_parent" >

    <TextView
        android:id="@+id/textView1"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_centerHorizontal="true"
        android:layout_centerVertical="true"
        android:text="TextView"
        android:textColor="#000000"
        android:textSize="30dp" />

</RelativeLayout>

我的输出如下所示：

我在实现目标方面遇到的问题：

我无法将从
编辑文本
获得的值设置为
textview
点击
按钮

有什么想法吗？
您可以使用该活动
在底部片段的onClick中，您可以执行以下操作

（（MainActivity）getActivity（））.doIt（）然后在您的main活动中创建一个方法doIt ，可能类似这样 public void doIt(){ frg2.setName(frg.getText()) } 在顶部片段中，创建一个方法getText ，该方法返回EditText的文本所有片段到片段的通信都是通过相关活动完成的。两个片段不应该直接通信 test.java //在您的例子中，它的main活动 public class test extends FragmentActivity implements textEntered { String value; boolean check = false; BottomFragment frg2; FragmentTransaction transaction; @Override protected void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); setContentView(R.layout.activity_main); Top_Fragment frg = new Top_Fragment(); frg2 = new BottomFragment(); FragmentManager manager = getSupportFragmentManager(); transaction = manager.beginTransaction(); transaction.add(R.id.My_Container_1_ID, frg, "Frag_Top_tag"); transaction.add(R.id.My_Container_3_ID, frg2, "Frag_Bottom_tag"); transaction.commit(); } @Override public void setValue(String editextvalue) { value = editextvalue; if (frg2 != null) { frg2.setName(value); } else { Toast.makeText(getApplicationContext(), "fragment 2 is null", 1000).show(); } } } Top\u Fragment.java public class Top_Fragment extends Fragment { textEntered mCallback; Button b; EditText ed; public interface textEntered { public void setValue(String editextvalue); } @Override public View onCreateView(LayoutInflater inflater, ViewGroup container, Bundle savedInstanceState) { // TODO Auto-generated method stub View view = inflater.inflate(R.layout.my_fragment1, container, false); ed = (EditText) view.findViewById(R.id.editText1); return view; } @Override public void onActivityCreated(Bundle savedInstanceState) { // TODO Auto-generated method stub super.onActivityCreated(savedInstanceState); b = (Button) getView().findViewById(R.id.button1); b.setOnClickListener(new OnClickListener() { @Override public void onClick(View v) { // TODO Auto-generated method stub String s = ed.getText().toString(); mCallback.setValue(s); } }); } @Override public void onAttach(Activity activity) { super.onAttach(activity); // This makes sure that the container activity has implemented // the callback interface. If not, it throws an exception try { mCallback = (textEntered) activity; } catch (ClassCastException e) { throw new ClassCastException(activity.toString() + " must implement textEntered"); } } } my_fragment1.xml <?xml version="1.0" encoding="utf-8"?> <RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android" android:layout_width="fill_parent" android:layout_height="fill_parent" > <EditText android:id="@+id/editText1" android:layout_width="wrap_content" android:layout_height="wrap_content" android:layout_centerHorizontal="true" android:layout_centerVertical="true" android:ems="10" android:textColor="#000000" android:singleLine="true" > <requestFocus /> </EditText> <Button android:id="@+id/button1" android:layout_width="wrap_content" android:layout_height="wrap_content" android:layout_below="@+id/editText1" android:layout_centerHorizontal="true" android:layout_marginTop="20dp" android:text="Button" /> </RelativeLayout> 断片折断片段之间的通信在许多情况下，需要在片段之间进行通信。您需要在按钮单击事件上的片段之间传递数据。您还可以使用Android工具栏在片段之间切换。当您向工具栏添加按钮时，您需要使用fragment动态更改屏幕创建一个有助于我们沟通的界面 Communicate.java public class Top_Fragment extends Fragment{ @Override public View onCreateView(LayoutInflater inflater, ViewGroup container, Bundle savedInstanceState) { // TODO Auto-generated method stub View view=inflater.inflate(R.layout.my_fragment1, container, false); return view; } } package com.example.deleteme; import android.os.Bundle; import android.support.v4.app.Fragment; import android.view.LayoutInflater; import android.view.View; import android.view.View.OnClickListener; import android.view.ViewGroup; import android.widget.Button; public class Middle_Fragment extends Fragment{ View view; Button btn; @Override public View onCreateView(LayoutInflater inflater, ViewGroup container, Bundle savedInstanceState) { // TODO Auto-generated method stub view=inflater.inflate(R.layout.my_fragment2, container, false); btn=(Button) view.findViewById(R.id.button1); btn.setOnClickListener(new OnClickListener() { @Override public void onClick(View v) { // TODO Auto-generated method stub } }); return view; } } public class Bottom_Fragment extends Fragment{ View view; TextView display_text; @Override public View onCreateView(LayoutInflater inflater, ViewGroup container, Bundle savedInstanceState) { // TODO Auto-generated method stub view=inflater.inflate(R.layout.my_fragment3, container,false); display_text=(TextView) view.findViewById(R.id.editText1); return view; } public void setName(String Name){ display_text.setText("Result::" + Name); } } public class MainActivity extends FragmentActivity { @Override protected void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); setContentView(R.layout.activity_main); Top_Fragment frg=new Top_Fragment();//create the fragment instance for the top fragment Middle_Fragment frg1=new Middle_Fragment();//create the fragment instance for the middle fragment Bottom_Fragment frg2=new Bottom_Fragment();//create the fragment instance for the bottom fragment FragmentManager manager=getSupportFragmentManager();//create an instance of fragment manager FragmentTransaction transaction=manager.beginTransaction();//create an instance of Fragment-transaction transaction.add(R.id.My_Container_1_ID, frg, "Frag_Top_tag"); transaction.add(R.id.My_Container_2_ID, frg1, "Frag_Middle_tag"); transaction.add(R.id.My_Container_3_ID, frg2, "Frag_Bottom_tag"); transaction.commit(); } } package com.example.amaanmemon.testfragment; interface Communicate { public void sendData(); } package com.example.amaanmemon.testfragment; import android.support.v4.app.Fragment; import android.os.Bundle; import android.view.LayoutInflater; import android.view.View; import android.view.ViewGroup; import android.widget.EditText; public class TopFragment extends Fragment { EditText firstName; @Override public View onCreateView(LayoutInflater inflater, ViewGroup container, Bundle savedInstanceState) { // TODO Auto-generated method stub View view=inflater.inflate(R.layout.my_fragment1, container, false); return view; } public void onActivityCreated(Bundle savedInstanceState) { // TODO Auto-generated method stub super.onActivityCreated(savedInstanceState); firstName = (EditText) getActivity().findViewById(R.id.editText1); } public String getData(){ return firstName.getText().toString(); } } package com.example.amaanmemon.testfragment; import android.os.Bundle; import android.support.v4.app.Fragment; import android.view.LayoutInflater; import android.view.View; import android.view.View.OnClickListener; import android.view.ViewGroup; import android.widget.Button; public class MiddleFragment extends Fragment implements OnClickListener{ View view; Button btn; Communicate cm; @Override public View onCreateView(LayoutInflater inflater, ViewGroup container, Bundle savedInstanceState) { // TODO Auto-generated method stub view=inflater.inflate(R.layout.my_fragment2, container, false); return view; } @Override public void onActivityCreated(Bundle savedInstanceState) { // TODO Auto-generated method stub super.onActivityCreated(savedInstanceState); cm = (Communicate) getActivity(); btn = (Button) getActivity().findViewById(R.id.button1); btn.setOnClickListener(this); } @Override public void onClick(View arg0) { // TODO Auto-generated method stub cm.sendData(); } } package com.example.amaanmemon.testfragment; import android.os.Bundle; import android.support.v4.app.Fragment; import android.view.LayoutInflater; import android.view.View; import android.view.View.OnClickListener; import android.view.ViewGroup; import android.widget.Button; import android.widget.TextView; public class BottomFragment extends Fragment{ int count; View view; TextView display_text; @Override public View onCreateView(LayoutInflater inflater, ViewGroup container, Bundle savedInstanceState) { // TODO Auto-generated method stub view=inflater.inflate(R.layout.my_fragment3, container,false); return view; } @Override public void onActivityCreated(Bundle savedInstanceState) { // TODO Auto-generated method stub super.onActivityCreated(savedInstanceState); display_text = (TextView)getActivity().findViewById(R.id.textView1); } public void incrementData(String displayText){ display_text.setText(displayText); } } package com.example.amaanmemon.testfragment; import android.support.v4.app.FragmentActivity; import android.os.Bundle; import android.support.v4.app.FragmentManager; import android.support.v4.app.FragmentTransaction; public class MainActivity extends FragmentActivity implements Communicate{ TopFragment frg; MiddleFragment frg1; BottomFragment frg2; FragmentTransaction transaction; @Override protected void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); setContentView(R.layout.activity_main); frg = new TopFragment(); frg1 = new MiddleFragment(); frg2 = new BottomFragment(); FragmentManager manager=getSupportFragmentManager(); transaction=manager.beginTransaction(); transaction.add(R.id.My_Container_1_ID, frg, "Frag_Top_tag"); transaction.add(R.id.My_Container_2_ID, frg1, "Frag_Middle_tag"); transaction.add(R.id.My_Container_3_ID, frg2, "Frag_Bottom_tag"); transaction.commit(); } @Override public void sendData() { String temp = frg.getData(); frg2.incrementData(temp); } } TopFragment.java public class Top_Fragment extends Fragment{ @Override public View onCreateView(LayoutInflater inflater, ViewGroup container, Bundle savedInstanceState) { // TODO Auto-generated method stub View view=inflater.inflate(R.layout.my_fragment1, container, false); return view; } } package com.example.deleteme; import android.os.Bundle; import android.support.v4.app.Fragment; import android.view.LayoutInflater; import android.view.View; import android.view.View.OnClickListener; import android.view.ViewGroup; import android.widget.Button; public class Middle_Fragment extends Fragment{ View view; Button btn; @Override public View onCreateView(LayoutInflater inflater, ViewGroup container, Bundle savedInstanceState) { // TODO Auto-generated method stub view=inflater.inflate(R.layout.my_fragment2, container, false); btn=(Button) view.findViewById(R.id.button1); btn.setOnClickListener(new OnClickListener() { @Override public void onClick(View v) { // TODO Auto-generated method stub } }); return view; } } public class Bottom_Fragment extends Fragment{ View view; TextView display_text; @Override public View onCreateView(LayoutInflater inflater, ViewGroup container, Bundle savedInstanceState) { // TODO Auto-generated method stub view=inflater.inflate(R.layout.my_fragment3, container,false); display_text=(TextView) view.findViewById(R.id.editText1); return view; } public void setName(String Name){ display_text.setText("Result::" + Name); } } public class MainActivity extends FragmentActivity { @Override protected void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); setContentView(R.layout.activity_main); Top_Fragment frg=new Top_Fragment();//create the fragment instance for the top fragment Middle_Fragment frg1=new Middle_Fragment();//create the fragment instance for the middle fragment Bottom_Fragment frg2=new Bottom_Fragment();//create the fragment instance for the bottom fragment FragmentManager manager=getSupportFragmentManager();//create an instance of fragment manager FragmentTransaction transaction=manager.beginTransaction();//create an instance of Fragment-transaction transaction.add(R.id.My_Container_1_ID, frg, "Frag_Top_tag"); transaction.add(R.id.My_Container_2_ID, frg1, "Frag_Middle_tag"); transaction.add(R.id.My_Container_3_ID, frg2, "Frag_Bottom_tag"); transaction.commit(); } } package com.example.amaanmemon.testfragment; interface Communicate { public void sendData(); } package com.example.amaanmemon.testfragment; import android.support.v4.app.Fragment; import android.os.Bundle; import android.view.LayoutInflater; import android.view.View; import android.view.ViewGroup; import android.widget.EditText; public class TopFragment extends Fragment { EditText firstName; @Override public View onCreateView(LayoutInflater inflater, ViewGroup container, Bundle savedInstanceState) { // TODO Auto-generated method stub View view=inflater.inflate(R.layout.my_fragment1, container, false); return view; } public void onActivityCreated(Bundle savedInstanceState) { // TODO Auto-generated method stub super.onActivityCreated(savedInstanceState); firstName = (EditText) getActivity().findViewById(R.id.editText1); } public String getData(){ return firstName.getText().toString(); } } package com.example.amaanmemon.testfragment; import android.os.Bundle; import android.support.v4.app.Fragment; import android.view.LayoutInflater; import android.view.View; import android.view.View.OnClickListener; import android.view.ViewGroup; import android.widget.Button; public class MiddleFragment extends Fragment implements OnClickListener{ View view; Button btn; Communicate cm; @Override public View onCreateView(LayoutInflater inflater, ViewGroup container, Bundle savedInstanceState) { // TODO Auto-generated method stub view=inflater.inflate(R.layout.my_fragment2, container, false); return view; } @Override public void onActivityCreated(Bundle savedInstanceState) { // TODO Auto-generated method stub super.onActivityCreated(savedInstanceState); cm = (Communicate) getActivity(); btn = (Button) getActivity().findViewById(R.id.button1); btn.setOnClickListener(this); } @Override public void onClick(View arg0) { // TODO Auto-generated method stub cm.sendData(); } } package com.example.amaanmemon.testfragment; import android.os.Bundle; import android.support.v4.app.Fragment; import android.view.LayoutInflater; import android.view.View; import android.view.View.OnClickListener; import android.view.ViewGroup; import android.widget.Button; import android.widget.TextView; public class BottomFragment extends Fragment{ int count; View view; TextView display_text; @Override public View onCreateView(LayoutInflater inflater, ViewGroup container, Bundle savedInstanceState) { // TODO Auto-generated method stub view=inflater.inflate(R.layout.my_fragment3, container,false); return view; } @Override public void onActivityCreated(Bundle savedInstanceState) { // TODO Auto-generated method stub super.onActivityCreated(savedInstanceState); display_text = (TextView)getActivity().findViewById(R.id.textView1); } public void incrementData(String displayText){ display_text.setText(displayText); } } package com.example.amaanmemon.testfragment; import android.support.v4.app.FragmentActivity; import android.os.Bundle; import android.support.v4.app.FragmentManager; import android.support.v4.app.FragmentTransaction; public class MainActivity extends FragmentActivity implements Communicate{ TopFragment frg; MiddleFragment frg1; BottomFragment frg2; FragmentTransaction transaction; @Override protected void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); setContentView(R.layout.activity_main); frg = new TopFragment(); frg1 = new MiddleFragment(); frg2 = new BottomFragment(); FragmentManager manager=getSupportFragmentManager(); transaction=manager.beginTransaction(); transaction.add(R.id.My_Container_1_ID, frg, "Frag_Top_tag"); transaction.add(R.id.My_Container_2_ID, frg1, "Frag_Middle_tag"); transaction.add(R.id.My_Container_3_ID, frg2, "Frag_Bottom_tag"); transaction.commit(); } @Override public void sendData() { String temp = frg.getData(); frg2.incrementData(temp); } } MiddleFragment.java public class Top_Fragment extends Fragment{ @Override public View onCreateView(LayoutInflater inflater, ViewGroup container, Bundle savedInstanceState) { // TODO Auto-generated method stub View view=inflater.inflate(R.layout.my_fragment1, container, false); return view; } } package com.example.deleteme; import android.os.Bundle; import android.support.v4.app.Fragment; import android.view.LayoutInflater; import android.view.View; import android.view.View.OnClickListener; import android.view.ViewGroup; import android.widget.Button; public class Middle_Fragment extends Fragment{ View view; Button btn; @Override public View onCreateView(LayoutInflater inflater, ViewGroup container, Bundle savedInstanceState) { // TODO Auto-generated method stub view=inflater.inflate(R.layout.my_fragment2, container, false); btn=(Button) view.findViewById(R.id.button1); btn.setOnClickListener(new OnClickListener() { @Override public void onClick(View v) { // TODO Auto-generated method stub } }); return view; } } public class Bottom_Fragment extends Fragment{ View view; TextView display_text; @Override public View onCreateView(LayoutInflater inflater, ViewGroup container, Bundle savedInstanceState) { // TODO Auto-generated method stub view=inflater.inflate(R.layout.my_fragment3, container,false); display_text=(TextView) view.findViewById(R.id.editText1); return view; } public void setName(String Name){ display_text.setText("Result::" + Name); } } public class MainActivity extends FragmentActivity { @Override protected void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); setContentView(R.layout.activity_main); Top_Fragment frg=new Top_Fragment();//create the fragment instance for the top fragment Middle_Fragment frg1=new Middle_Fragment();//create the fragment instance for the middle fragment Bottom_Fragment frg2=new Bottom_Fragment();//create the fragment instance for the bottom fragment FragmentManager manager=getSupportFragmentManager();//create an instance of fragment manager FragmentTransaction transaction=manager.beginTransaction();//create an instance of Fragment-transaction transaction.add(R.id.My_Container_1_ID, frg, "Frag_Top_tag"); transaction.add(R.id.My_Container_2_ID, frg1, "Frag_Middle_tag"); transaction.add(R.id.My_Container_3_ID, frg2, "Frag_Bottom_tag"); transaction.commit(); } } package com.example.amaanmemon.testfragment; interface Communicate { public void sendData(); } package com.example.amaanmemon.testfragment; import android.support.v4.app.Fragment; import android.os.Bundle; import android.view.LayoutInflater; import android.view.View; import android.view.ViewGroup; import android.widget.EditText; public class TopFragment extends Fragment { EditText firstName; @Override public View onCreateView(LayoutInflater inflater, ViewGroup container, Bundle savedInstanceState) { // TODO Auto-generated method stub View view=inflater.inflate(R.layout.my_fragment1, container, false); return view; } public void onActivityCreated(Bundle savedInstanceState) { // TODO Auto-generated method stub super.onActivityCreated(savedInstanceState); firstName = (EditText) getActivity().findViewById(R.id.editText1); } public String getData(){ return firstName.getText().toString(); } } package com.example.amaanmemon.testfragment; import android.os.Bundle; import android.support.v4.app.Fragment; import android.view.LayoutInflater; import android.view.View; import android.view.View.OnClickListener; import android.view.ViewGroup; import android.widget.Button; public class MiddleFragment extends Fragment implements OnClickListener{ View view; Button btn; Communicate cm; @Override public View onCreateView(LayoutInflater inflater, ViewGroup container, Bundle savedInstanceState) { // TODO Auto-generated method stub view=inflater.inflate(R.layout.my_fragment2, container, false); return view; } @Override public void onActivityCreated(Bundle savedInstanceState) { // TODO Auto-generated method stub super.onActivityCreated(savedInstanceState); cm = (Communicate) getActivity(); btn = (Button) getActivity().findViewById(R.id.button1); btn.setOnClickListener(this); } @Override public void onClick(View arg0) { // TODO Auto-generated method stub cm.sendData(); } } package com.example.amaanmemon.testfragment; import android.os.Bundle; import android.support.v4.app.Fragment; import android.view.LayoutInflater; import android.view.View; import android.view.View.OnClickListener; import android.view.ViewGroup; import android.widget.Button; import android.widget.TextView; public class BottomFragment extends Fragment{ int count; View view; TextView display_text; @Override public View onCreateView(LayoutInflater inflater, ViewGroup container, Bundle savedInstanceState) { // TODO Auto-generated method stub view=inflater.inflate(R.layout.my_fragment3, container,false); return view; } @Override public void onActivityCreated(Bundle savedInstanceState) { // TODO Auto-generated method stub super.onActivityCreated(savedInstanceState); display_text = (TextView)getActivity().findViewById(R.id.textView1); } public void incrementData(String displayText){ display_text.setText(displayText); } } package com.example.amaanmemon.testfragment; import android.support.v4.app.FragmentActivity; import android.os.Bundle; import android.support.v4.app.FragmentManager; import android.support.v4.app.FragmentTransaction; public class MainActivity extends FragmentActivity implements Communicate{ TopFragment frg; MiddleFragment frg1; BottomFragment frg2; FragmentTransaction transaction; @Override protected void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); setContentView(R.layout.activity_main); frg = new TopFragment(); frg1 = new MiddleFragment(); frg2 = new BottomFragment(); FragmentManager manager=getSupportFragmentManager(); transaction=manager.beginTransaction(); transaction.add(R.id.My_Container_1_ID, frg, "Frag_Top_tag"); transaction.add(R.id.My_Container_2_ID, frg1, "Frag_Middle_tag"); transaction.add(R.id.My_Container_3_ID, frg2, "Frag_Bottom_tag"); transaction.commit(); } @Override public void sendData() { String temp = frg.getData(); frg2.incrementData(temp); } } BottomFragment.java public class Top_Fragment extends Fragment{ @Override public View onCreateView(LayoutInflater inflater, ViewGroup container, Bundle savedInstanceState) { // TODO Auto-generated method stub View view=inflater.inflate(R.layout.my_fragment1, container, false); return view; } } package com.example.deleteme; import android.os.Bundle; import android.support.v4.app.Fragment; import android.view.LayoutInflater; import android.view.View; import android.view.View.OnClickListener; import android.view.ViewGroup; import android.widget.Button; public class Middle_Fragment extends Fragment{ View view; Button btn; @Override public View onCreateView(LayoutInflater inflater, ViewGroup container, Bundle savedInstanceState) { // TODO Auto-generated method stub view=inflater.inflate(R.layout.my_fragment2, container, false); btn=(Button) view.findViewById(R.id.button1); btn.setOnClickListener(new OnClickListener() { @Override public void onClick(View v) { // TODO Auto-generated method stub } }); return view; } } public class Bottom_Fragment extends Fragment{ View view; TextView display_text; @Override public View onCreateView(LayoutInflater inflater, ViewGroup container, Bundle savedInstanceState) { // TODO Auto-generated method stub view=inflater.inflate(R.layout.my_fragment3, container,false); display_text=(TextView) view.findViewById(R.id.editText1); return view; } public void setName(String Name){ display_text.setText("Result::" + Name); } } public class MainActivity extends FragmentActivity { @Override protected void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); setContentView(R.layout.activity_main); Top_Fragment frg=new Top_Fragment();//create the fragment instance for the top fragment Middle_Fragment frg1=new Middle_Fragment();//create the fragment instance for the middle fragment Bottom_Fragment frg2=new Bottom_Fragment();//create the fragment instance for the bottom fragment FragmentManager manager=getSupportFragmentManager();//create an instance of fragment manager FragmentTransaction transaction=manager.beginTransaction();//create an instance of Fragment-transaction transaction.add(R.id.My_Container_1_ID, frg, "Frag_Top_tag"); transaction.add(R.id.My_Container_2_ID, frg1, "Frag_Middle_tag"); transaction.add(R.id.My_Container_3_ID, frg2, "Frag_Bottom_tag"); transaction.commit(); } } package com.example.amaanmemon.testfragment; interface Communicate { public void sendData(); } package com.example.amaanmemon.testfragment; import android.support.v4.app.Fragment; import android.os.Bundle; import android.view.LayoutInflater; import android.view.View; import android.view.ViewGroup; import android.widget.EditText; public class TopFragment extends Fragment { EditText firstName; @Override public View onCreateView(LayoutInflater inflater, ViewGroup container, Bundle savedInstanceState) { // TODO Auto-generated method stub View view=inflater.inflate(R.layout.my_fragment1, container, false); return view; } public void onActivityCreated(Bundle savedInstanceState) { // TODO Auto-generated method stub super.onActivityCreated(savedInstanceState); firstName = (EditText) getActivity().findViewById(R.id.editText1); } public String getData(){ return firstName.getText().toString(); } } package com.example.amaanmemon.testfragment; import android.os.Bundle; import android.support.v4.app.Fragment; import android.view.LayoutInflater; import android.view.View; import android.view.View.OnClickListener; import android.view.ViewGroup; import android.widget.Button; public class MiddleFragment extends Fragment implements OnClickListener{ View view; Button btn; Communicate cm; @Override public View onCreateView(LayoutInflater inflater, ViewGroup container, Bundle savedInstanceState) { // TODO Auto-generated method stub view=inflater.inflate(R.layout.my_fragment2, container, false); return view; } @Override public void onActivityCreated(Bundle savedInstanceState) { // TODO Auto-generated method stub super.onActivityCreated(savedInstanceState); cm = (Communicate) getActivity(); btn = (Button) getActivity().findViewById(R.id.button1); btn.setOnClickListener(this); } @Override public void onClick(View arg0) { // TODO Auto-generated method stub cm.sendData(); } } package com.example.amaanmemon.testfragment; import android.os.Bundle; import android.support.v4.app.Fragment; import android.view.LayoutInflater; import android.view.View; import android.view.View.OnClickListener; import android.view.ViewGroup; import android.widget.Button; import android.widget.TextView; public class BottomFragment extends Fragment{ int count; View view; TextView display_text; @Override public View onCreateView(LayoutInflater inflater, ViewGroup container, Bundle savedInstanceState) { // TODO Auto-generated method stub view=inflater.inflate(R.layout.my_fragment3, container,false); return view; } @Override public void onActivityCreated(Bundle savedInstanceState) { // TODO Auto-generated method stub super.onActivityCreated(savedInstanceState); display_text = (TextView)getActivity().findViewById(R.id.textView1); } public void incrementData(String displayText){ display_text.setText(displayText); } } package com.example.amaanmemon.testfragment; import android.support.v4.app.FragmentActivity; import android.os.Bundle; import android.support.v4.app.FragmentManager; import android.support.v4.app.FragmentTransaction; public class MainActivity extends FragmentActivity implements Communicate{ TopFragment frg; MiddleFragment frg1; BottomFragment frg2; FragmentTransaction transaction; @Override protected void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); setContentView(R.layout.activity_main); frg = new TopFragment(); frg1 = new MiddleFragment(); frg2 = new BottomFragment(); FragmentManager manager=getSupportFragmentManager(); transaction=manager.beginTransaction(); transaction.add(R.id.My_Container_1_ID, frg, "Frag_Top_tag"); transaction.add(R.id.My_Container_2_ID, frg1, "Frag_Middle_tag"); transaction.add(R.id.My_Container_3_ID, frg2, "Frag_Bottom_tag"); transaction.commit(); } @Override public void sendData() { String temp = frg.getData(); frg2.incrementData(temp); } } MainActivity.java public class Top_Fragment extends Fragment{ @Override public View onCreateView(LayoutInflater inflater, ViewGroup container, Bundle savedInstanceState) { // TODO Auto-generated method stub View view=inflater.inflate(R.layout.my_fragment1, container, false); return view; } } package com.example.deleteme; import android.os.Bundle; import android.support.v4.app.Fragment; import android.view.LayoutInflater; import android.view.View; import android.view.View.OnClickListener; import android.view.ViewGroup; import android.widget.Button; public class Middle_Fragment extends Fragment{ View view; Button btn; @Override public View onCreateView(LayoutInflater inflater, ViewGroup container, Bundle savedInstanceState) { // TODO Auto-generated method stub view=inflater.inflate(R.layout.my_fragment2, container, false); btn=(Button) view.findViewById(R.id.button1); btn.setOnClickListener(new OnClickListener() { @Override public void onClick(View v) { // TODO Auto-generated method stub } }); return view; } } public class Bottom_Fragment extends Fragment{ View view; TextView display_text; @Override public View onCreateView(LayoutInflater inflater, ViewGroup container, Bundle savedInstanceState) { // TODO Auto-generated method stub view=inflater.inflate(R.layout.my_fragment3, container,false); display_text=(TextView) view.findViewById(R.id.editText1); return view; } public void setName(String Name){ display_text.setText("Result::" + Name); } } public class MainActivity extends FragmentActivity { @Override protected void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); setContentView(R.layout.activity_main); Top_Fragment frg=new Top_Fragment();//create the fragment instance for the top fragment Middle_Fragment frg1=new Middle_Fragment();//create the fragment instance for the middle fragment Bottom_Fragment frg2=new Bottom_Fragment();//create the fragment instance for the bottom fragment FragmentManager manager=getSupportFragmentManager();//create an instance of fragment manager FragmentTransaction transaction=manager.beginTransaction();//create an instance of Fragment-transaction transaction.add(R.id.My_Container_1_ID, frg, "Frag_Top_tag"); transaction.add(R.id.My_Container_2_ID, frg1, "Frag_Middle_tag"); transaction.add(R.id.My_Container_3_ID, frg2, "Frag_Bottom_tag"); transaction.commit(); } } package com.example.amaanmemon.testfragment; interface Communicate { public void sendData(); } package com.example.amaanmemon.testfragment; import android.support.v4.app.Fragment; import android.os.Bundle; import android.view.LayoutInflater; import android.view.View; import android.view.ViewGroup; import android.widget.EditText; public class TopFragment extends Fragment { EditText firstName; @Override public View onCreateView(LayoutInflater inflater, ViewGroup container, Bundle savedInstanceState) { // TODO Auto-generated method stub View view=inflater.inflate(R.layout.my_fragment1, container, false); return view; } public void onActivityCreated(Bundle savedInstanceState) { // TODO Auto-generated method stub super.onActivityCreated(savedInstanceState); firstName = (EditText) getActivity().findViewById(R.id.editText1); } public String getData(){ return firstName.getText().toString(); } } package com.example.amaanmemon.testfragment; import android.os.Bundle; import android.support.v4.app.Fragment; import android.view.LayoutInflater; import android.view.View; import android.view.View.OnClickListener; import android.view.ViewGroup; import android.widget.Button; public class MiddleFragment extends Fragment implements OnClickListener{ View view; Button btn; Communicate cm; @Override public View onCreateView(LayoutInflater inflater, ViewGroup container, Bundle savedInstanceState) { // TODO Auto-generated method stub view=inflater.inflate(R.layout.my_fragment2, container, false); return view; } @Override public void onActivityCreated(Bundle savedInstanceState) { // TODO Auto-generated method stub super.onActivityCreated(savedInstanceState); cm = (Communicate) getActivity(); btn = (Button) getActivity().findViewById(R.id.button1); btn.setOnClickListener(this); } @Override public void onClick(View arg0) { // TODO Auto-generated method stub cm.sendData(); } } package com.example.amaanmemon.testfragment; import android.os.Bundle; import android.support.v4.app.Fragment; import android.view.LayoutInflater; import android.view.View; import android.view.View.OnClickListener; import android.view.ViewGroup; import android.widget.Button; import android.widget.TextView; public class BottomFragment extends Fragment{ int count; View view; TextView display_text; @Override public View onCreateView(LayoutInflater inflater, ViewGroup container, Bundle savedInstanceState) { // TODO Auto-generated method stub view=inflater.inflate(R.layout.my_fragment3, container,false); return view; } @Override public void onActivityCreated(Bundle savedInstanceState) { // TODO Auto-generated method stub super.onActivityCreated(savedInstanceState); display_text = (TextView)getActivity().findViewById(R.id.textView1); } public void incrementData(String displayText){ display_text.setText(displayText); } } package com.example.amaanmemon.testfragment; import android.support.v4.app.FragmentActivity; import android.os.Bundle; import android.support.v4.app.FragmentManager; import android.support.v4.app.FragmentTransaction; public class MainActivity extends FragmentActivity implements Communicate{ TopFragment frg; MiddleFragment frg1; BottomFragment frg2; FragmentTransaction transaction; @Override protected void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); setContentView(R.layout.activity_main); frg = new TopFragment(); frg1 = new MiddleFragment(); frg2 = new BottomFragment(); FragmentManager manager=getSupportFragmentManager(); transaction=manager.beginTransaction(); transaction.add(R.id.My_Container_1_ID, frg, "Frag_Top_tag"); transaction.add(R.id.My_Container_2_ID, frg1, "Frag_Middle_tag"); transaction.add(R.id.My_Container_3_ID, frg2, "Frag_Bottom_tag"); transaction.commit(); } @Override public void sendData() { String temp = frg.getData(); frg2.incrementData(temp); } } 您可以从问题中复制xml文件。您可以查看下面的输出您在哪里调用setName（字符串名称）？请查看文档。有一个例子。所有片段到片段的通信都是通过相关活动完成的。两个片段不应该直接交流。不，你不需要这样做。等等，我会发布一个答案，你不需要有片段2，它只是一个按钮，你需要的按钮是顶部片段，以获得EditText值。在某个操作中获得editext的值，所以需要在顶部片段中使用按钮。中间的第二个按钮是无用的。第三，要理解流程，你们需要知道如何通过活动在片段之间进行协作，这就是这里所做的。谢谢，我理解了大部分事情。。。。。但是什么是mcallback。。。。为什么要实现TextEnter。。。。。可以用外行的语言写一张便条@smriti3它是一个用作回拨的接口。您可以在片段中定义接口并在活动中实现它。textcentered 是一个接口