Android 将数据从一个片段传递到另一个片段

我知道，这个问题已经存在于这个站点和其他站点中，但我仍然试图找到一个解决方案，因为到目前为止，每个解决方案都失败了

我有一个活动，它有两个片段。在第一个片段中，我有5个EditText，这个输入我需要传递给第二个片段，但是。。。我在这个包中还有一个Java类，它必须处理这个输入的值，结果必须显示在第二个片段中。 这是一个普通的计算器

这是我的第一个片段：

package com.example.afotel;


import android.os.Bundle;
import android.support.annotation.Nullable;
import android.support.v4.app.Fragment;
import android.support.v4.app.FragmentTransaction;
import android.view.LayoutInflater;
import android.view.View;
import android.view.ViewGroup;
import android.widget.Button;
import android.widget.EditText;
import android.widget.Toast;

public class gyorsSzam extends Fragment {

    EditText gradeFive, gradeFour, gradeThree, gradeTwo, gradeOne;

    @Nullable
    @Override
    public View onCreateView(LayoutInflater inflater, @Nullable ViewGroup container,
                             @Nullable Bundle savedInstanceState) {
        View view = inflater.inflate(R.layout.fragment_gyors_szam, container, false);
        Button calculate = (Button) view.findViewById(R.id.gGyors);

        gradeFive = (EditText) view.findViewById(R.id.numberOfGardeFive);
        gradeFour = (EditText) view.findViewById(R.id.numberOfGardeFour);
        gradeThree = (EditText) view.findViewById(R.id.numberOfGardeThree);
        gradeTwo = (EditText) view.findViewById(R.id.numberOfGardeTwo);
        gradeOne = (EditText) view.findViewById(R.id.numberOfGardeOne);

        calculate.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View v) {
                FragmentTransaction fr = getFragmentManager().beginTransaction();
                fr.replace(R.id.gyorsSzamlalas, new jegyekFelLe());
                fr.commit();

                String gradeFiveSt = gradeFive.getText().toString();
                String gradeFourSt = gradeFour.getText().toString();
                String gradeThreeSt = gradeThree.getText().toString();
                String gradeTwoSt = gradeTwo.getText().toString();
                String gradeOneeSt = gradeOne.getText().toString();

                Bundle bundle = new Bundle();
                bundle.putString("Five", gradeFiveSt );
                bundle.putString("Four", gradeFourSt );
                bundle.putString("Three", gradeThreeSt );
                bundle.putString("Two", gradeTwoSt );
                bundle.putString("Ones", gradeOneeSt );

            }
        });

        return view;
    }
}

package com.example.afotel;


import android.os.Bundle;
import android.support.annotation.Nullable;
import android.support.v4.app.Fragment;
import android.view.LayoutInflater;
import android.view.View;
import android.view.ViewGroup;
import android.widget.EditText;
import android.widget.TextView;

public class jegyekFelLe extends Fragment {


    public jegyekFelLe() {


    }
    @Nullable
    @Override
    public View onCreateView(LayoutInflater inflater,@Nullable ViewGroup container,
                             @Nullable Bundle savedInstanceState) {
        View rootView = inflater.inflate(R.layout.fragment_jegyek_fel_le, container, false);

        Bundle bundle = getArguments();

        String gradeFive = bundle.getString("Five");
        String gradeFour = bundle.getString("Four");
        String gradeThree  = bundle.getString("Three");
        String gradeTwo = bundle.getString("Two");
        String gradeOne = bundle.getString("One");

        TextView upFive = (TextView) rootView.findViewById(R.id.upFive);
        upFive.setText(gradeFive);

        TextView felNegyes = (TextView) rootView.findViewById(R.id.);
        upFour.setText(gradeFour);

        TextView upThree= (TextView) rootView.findViewById(R.id.upThree);
        upThree.setText(gradeThree);

        TextView upTwo = (TextView) rootView.findViewById(R.id.upTwo);
        upTwo.setText(gradeTwo);

        TextView downOne = (TextView) rootView.findViewById(R.id.dowbOne);
        leEgyes.setText(gradeOne);

        return rootView;
    }
}

这是我的第二个片段：

package com.example.afotel;


import android.os.Bundle;
import android.support.annotation.Nullable;
import android.support.v4.app.Fragment;
import android.support.v4.app.FragmentTransaction;
import android.view.LayoutInflater;
import android.view.View;
import android.view.ViewGroup;
import android.widget.Button;
import android.widget.EditText;
import android.widget.Toast;

public class gyorsSzam extends Fragment {

    EditText gradeFive, gradeFour, gradeThree, gradeTwo, gradeOne;

    @Nullable
    @Override
    public View onCreateView(LayoutInflater inflater, @Nullable ViewGroup container,
                             @Nullable Bundle savedInstanceState) {
        View view = inflater.inflate(R.layout.fragment_gyors_szam, container, false);
        Button calculate = (Button) view.findViewById(R.id.gGyors);

        gradeFive = (EditText) view.findViewById(R.id.numberOfGardeFive);
        gradeFour = (EditText) view.findViewById(R.id.numberOfGardeFour);
        gradeThree = (EditText) view.findViewById(R.id.numberOfGardeThree);
        gradeTwo = (EditText) view.findViewById(R.id.numberOfGardeTwo);
        gradeOne = (EditText) view.findViewById(R.id.numberOfGardeOne);

        calculate.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View v) {
                FragmentTransaction fr = getFragmentManager().beginTransaction();
                fr.replace(R.id.gyorsSzamlalas, new jegyekFelLe());
                fr.commit();

                String gradeFiveSt = gradeFive.getText().toString();
                String gradeFourSt = gradeFour.getText().toString();
                String gradeThreeSt = gradeThree.getText().toString();
                String gradeTwoSt = gradeTwo.getText().toString();
                String gradeOneeSt = gradeOne.getText().toString();

                Bundle bundle = new Bundle();
                bundle.putString("Five", gradeFiveSt );
                bundle.putString("Four", gradeFourSt );
                bundle.putString("Three", gradeThreeSt );
                bundle.putString("Two", gradeTwoSt );
                bundle.putString("Ones", gradeOneeSt );

            }
        });

        return view;
    }
}

package com.example.afotel;


import android.os.Bundle;
import android.support.annotation.Nullable;
import android.support.v4.app.Fragment;
import android.view.LayoutInflater;
import android.view.View;
import android.view.ViewGroup;
import android.widget.EditText;
import android.widget.TextView;

public class jegyekFelLe extends Fragment {


    public jegyekFelLe() {


    }
    @Nullable
    @Override
    public View onCreateView(LayoutInflater inflater,@Nullable ViewGroup container,
                             @Nullable Bundle savedInstanceState) {
        View rootView = inflater.inflate(R.layout.fragment_jegyek_fel_le, container, false);

        Bundle bundle = getArguments();

        String gradeFive = bundle.getString("Five");
        String gradeFour = bundle.getString("Four");
        String gradeThree  = bundle.getString("Three");
        String gradeTwo = bundle.getString("Two");
        String gradeOne = bundle.getString("One");

        TextView upFive = (TextView) rootView.findViewById(R.id.upFive);
        upFive.setText(gradeFive);

        TextView felNegyes = (TextView) rootView.findViewById(R.id.);
        upFour.setText(gradeFour);

        TextView upThree= (TextView) rootView.findViewById(R.id.upThree);
        upThree.setText(gradeThree);

        TextView upTwo = (TextView) rootView.findViewById(R.id.upTwo);
        upTwo.setText(gradeTwo);

        TextView downOne = (TextView) rootView.findViewById(R.id.dowbOne);
        leEgyes.setText(gradeOne);

        return rootView;
    }
}

如果代码包含文本视图upFive…等。部分，如果我单击“计算”按钮，程序将崩溃。我不知道问题出在哪里，因为我做了这段视频所说的一切：

我知道，这个例子中的Java类没有被使用，这是因为我的代码有这个问题。首先，我想知道如何在两个片段之间传递数据，然后在我编写之后，计算我需要从这个文本中得到的结果。 我是安卓工作室的新手，所以我需要一个简单、不可接受的解决方案

---

我希望你能理解我的问题，对不起我的英语

您可以使用模型类来实现这一点，示例如下

package com.example.afotel

import android.os.Bundle;
import android.support.annotation.Nullable;
import android.support.v4.app.Fragment;
import android.support.v4.app.FragmentTransaction;
import android.view.LayoutInflater;
import android.view.View;
import android.view.ViewGroup;
import android.widget.Button;
import android.widget.EditText;
import android.widget.Toast;

public class gyorsSzam extends Fragment {

    EditText gradeFive, gradeFour, gradeThree, gradeTwo, gradeOne;

    @Nullable
    @Override
    public View onCreateView(LayoutInflater inflater, @Nullable ViewGroup container,
                             @Nullable Bundle savedInstanceState) {
        View view = inflater.inflate(R.layout.fragment_gyors_szam, container, false);
        Button calculate = (Button) view.findViewById(R.id.gGyors);

        gradeFive = (EditText) view.findViewById(R.id.numberOfGardeFive);
        gradeFour = (EditText) view.findViewById(R.id.numberOfGardeFour);
        gradeThree = (EditText) view.findViewById(R.id.numberOfGardeThree);
        gradeTwo = (EditText) view.findViewById(R.id.numberOfGardeTwo);
        gradeOne = (EditText) view.findViewById(R.id.numberOfGardeOne);

        calculate.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View v) {


                String gradeFiveSt = gradeFive.getText().toString();
                String gradeFourSt = gradeFour.getText().toString();
                String gradeThreeSt = gradeThree.getText().toString();
                String gradeTwoSt = gradeTwo.getText().toString();
                String gradeOneeSt = gradeOne.getText().toString();

                ModelClass modelClass = new ModelClass();
                modelClass.setFive(gradeFiveSt );
                modelClass.setFour(gradeFourSt );
                modelClass.setThree( gradeThreeSt );
                modelClass.setTwo(gradeTwoSt );
                modelClass.setOnes(gradeOneeSt );

                FragmentTransaction fr = getFragmentManager().beginTransaction();
                fr.replace(R.id.gyorsSzamlalas, new jegyekFelLe(modelClass));
                fr.commit();

            }
        });

        return view;
    }
}


package com.example.afotel;


import android.os.Bundle;
import android.support.annotation.Nullable;
import android.support.v4.app.Fragment;
import android.view.LayoutInflater;
import android.view.View;
import android.view.ViewGroup;
import android.widget.EditText;
import android.widget.TextView;

public class jegyekFelLe extends Fragment {
ModelClass modelClass;

    public jegyekFelLe(ModelClass modelClass) {

    this.modelClass = modelClass;

    }
    @Nullable
    @Override
    public View onCreateView(LayoutInflater inflater,@Nullable ViewGroup container,
                             @Nullable Bundle savedInstanceState) {
        View rootView = inflater.inflate(R.layout.fragment_jegyek_fel_le, container, false);

        //Bundle bundle = getArguments();

        //String gradeFive = bundle.getString("Five");
        //String gradeFour = bundle.getString("Four");
        //String gradeThree  = bundle.getString("Three");
        //String gradeTwo = bundle.getString("Two");
        //String gradeOne = bundle.getString("One");

        TextView upFive = (TextView) rootView.findViewById(R.id.upFive);
        upFive.setText(modelClass.getFive());

        TextView felNegyes = (TextView) rootView.findViewById(R.id.);
        upFour.setText(modelClass.getFour());

        TextView upThree= (TextView) rootView.findViewById(R.id.upThree);
        upThree.setText(modelClass.getThree());

        TextView upTwo = (TextView) rootView.findViewById(R.id.upTwo);
        upTwo.setText(modelClass.getTwo());

        TextView downOne = (TextView) rootView.findViewById(R.id.dowbOne);
        leEgyes.setText(modelClass.getOnes());

        return rootView;
    }
}


public class ModelClass {
    private String Ones;
    private String Two;
    private String Three;
    private String Four;
    private String Five;
    public String getOnes() {
        return Ones;
    }
    public void setOnes(String ones) {
        Ones = ones;
    }
    public String getTwo() {
        return Two;
    }
    public void setTwo(String two) {
        Two = two;
    }
    public String getThree() {
        return Three;
    }
    public void setThree(String three) {
        Three = three;
    }
    public String getFour() {
        return Four;
    }
    public void setFour(String four) {
        Four = four;
    }
    public String getFive() {
        return Five;
    }
    public void setFive(String five) {
        Five = five;
    }



}

---

在提交事务之前，设置绑定并向片段添加参数。您可能需要将代码更改为此结构：

    Bundle bundle= new Bundle();
    //add items to the bundle then begin transacting
    Fragment jegyekFelLe= new jegyekFelLe();
    jegyekFelLe.setArguments(bundle);
    FragmentTransaction fr = getFragmentManager().beginTransaction();
    fr.replace(R.id.gyorsSzamlalas,jegyekFelLe );
    fr.commit();

---

您没有将包作为片段中的参数传递

*将数据从片段A发送到片段B

 Bundle bundle= new Bundle();
   bundle.putString("Your_key",data)
   //add items to the bundle then begin transacting
    Fragment fragment= new jegyekFelLe();
        fragment.setArguments(bundle);
    FragmentTransaction fr = getFragmentManager().beginTransaction();
    fr.replace(R.id.gyorsSzamlalas,fragment );
    fr.commit();

*从片段a获取数据

String data = getArguments.getString("Your_key")

---

一,。您需要使用活动的支持片段管理器，而不是片段的子片段管理器

二,。在事务中将该包添加到片段管理器之前，需要将该包作为参数包提供给片段

    calculate.setOnClickListener(new View.OnClickListener() {
        @Override
        public void onClick(View v) {
            String gradeFiveSt = gradeFive.getText().toString();
            String gradeFourSt = gradeFour.getText().toString();
            String gradeThreeSt = gradeThree.getText().toString();
            String gradeTwoSt = gradeTwo.getText().toString();
            String gradeOneeSt = gradeOne.getText().toString();

            FragmentTransaction fr = (((FragmentActivity)getActivity()).getSupportFragmentManager()).beginTransaction();

            Fragment fragment = new jegyekFelLe();
            Bundle bundle = new Bundle();
            bundle.putString("Five", gradeFiveSt );
            bundle.putString("Four", gradeFourSt );
            bundle.putString("Three", gradeThreeSt );
            bundle.putString("Two", gradeTwoSt );
            bundle.putString("Ones", gradeOneeSt );
            fragment.setArguments(bundle);
            fr.replace(R.id.gyorsSzamlalas, fragment);
            fr.commit();
        }

---

在你的Gyorszam碎片中你根本没有使用捆绑包。你也可以使用你的代码，只是在创建捆绑包之后进行碎片调用。谢谢！谢谢你的帮助，现在我明白了！非常感谢您的时间，它的帮助！