Android 如何将一个片段中的字符串数据添加到另一个片段中的listview?
我已经试过了。我不知道它是怎么工作的。请给我提个建议。它在listview中不显示任何内容。 我也试过不用FragmentStatePagerAdapter。 请检查代码。有两个选项卡。我想在listview中将字符串从tab1传递到tab2并填充它Android 如何将一个片段中的字符串数据添加到另一个片段中的listview?,android,android-fragments,android-listview,android-arrayadapter,Android,Android Fragments,Android Listview,Android Arrayadapter,我已经试过了。我不知道它是怎么工作的。请给我提个建议。它在listview中不显示任何内容。 我也试过不用FragmentStatePagerAdapter。 请检查代码。有两个选项卡。我想在listview中将字符串从tab1传递到tab2并填充它 package com.example.salman.q85; import android.os.Bundle; import android.support.design.widget.TabLayout; import android.su
package com.example.salman.q85;
import android.os.Bundle;
import android.support.design.widget.TabLayout;
import android.support.v4.view.ViewPager;
import android.support.v7.app.AppCompatActivity;
import android.support.v7.widget.Toolbar;
import android.view.Menu;
import android.view.MenuItem;
public class MainActivity extends AppCompatActivity {
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
Toolbar toolbar = (Toolbar) findViewById(R.id.toolbar);
setSupportActionBar(toolbar);
TabLayout tabLayout = (TabLayout) findViewById(R.id.tab_layout);
tabLayout.addTab(tabLayout.newTab().setText("Tab1"));
tabLayout.addTab(tabLayout.newTab().setText("Tab2"));
tabLayout.setTabGravity(tabLayout.GRAVITY_FILL);
final ViewPager viewPager= (ViewPager)findViewById(R.id.pager);
final FAdapter adapter= new FAdapter(getSupportFragmentManager(),tabLayout.getTabCount());
viewPager.addOnPageChangeListener(new TabLayout.TabLayoutOnPageChangeListener(tabLayout));
viewPager.setAdapter(adapter);
tabLayout.setOnTabSelectedListener(new TabLayout.OnTabSelectedListener() {
@Override
public void onTabSelected(TabLayout.Tab tab) {
viewPager.setCurrentItem(tab.getPosition());
}
@Override
public void onTabUnselected(TabLayout.Tab tab) {
}
@Override
public void onTabReselected(TabLayout.Tab tab) {
}
});
}
@Override
public boolean onCreateOptionsMenu(Menu menu) {
// Inflate the menu; this adds items to the action bar if it is present.
getMenuInflater().inflate(R.menu.menu_main, menu);
return true;
}
@Override
public boolean onOptionsItemSelected(MenuItem item) {
// Handle action bar item clicks here. The action bar will
// automatically handle clicks on the Home/Up button, so long
// as you specify a parent activity in AndroidManifest.xml.
int id = item.getItemId();
//noinspection SimplifiableIfStatement
if (id == R.id.action_settings) {
return true;
}
return super.onOptionsItemSelected(item);
}
}
package com.example.salman.q85;
import android.os.Bundle;
import android.support.annotation.Nullable;
import android.view.LayoutInflater;
import android.view.View;
import android.view.ViewGroup;
import android.widget.Button;
import android.widget.EditText;
/**
* Created by Salman on 11/23/2015.
*/
public class Fragment1 extends android.support.v4.app.Fragment {
private static EditText editText;
@Nullable
@Override
public View onCreateView(LayoutInflater inflater, ViewGroup container, Bundle savedInstanceState) {
View view = inflater.inflate(R.layout.frag1, container, false);
Button button = (Button) view.findViewById(R.id.button);
editText = (EditText) view.findViewById(R.id.editText);
button.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View v) {
/*String data = editText.getText().toString();
*//*
Fragment2 frag = new Fragment2();
Bundle bundle = new Bundle();
bundle.putString("n", data);*//*
*/
getdata();
editText.setText("");
/*
String data = text.getText().toString();
Fragment2 frag = (Fragment2)getFragmentManager().findFragmentById(R.id.fragment2);
frag.addIten(data);
text.setText("");;
*/
}
});
return view;
}
public String getdata() {
String s;
s = editText.getText().toString();
return s;
}
}
package com.example.salman.q85;
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.ArrayAdapter;
import android.widget.ListView;
import java.util.ArrayList;
/**
* Created by Salman on 11/23/2015.
*/
public class Fragment2 extends Fragment {
ListView listView;
ArrayList<String> items;
View view;
@Nullable
@Override
public View onCreateView(LayoutInflater inflater, ViewGroup container, Bundle savedInstanceState) {
view = inflater.inflate(R.layout.frag2, container, false);
listView = (ListView) view.findViewById(R.id.listView);
items = new ArrayList<String>();
listView=(ListView)view.findViewById(R.id.listView);
listView.setAdapter(new ArrayAdapter<String>(getActivity(), android.R.layout.simple_list_item_1, items));
Fragment1 f1= new Fragment1();
String data=f1.getdata();
items.add(data);
return view;
}
/* public void adddata(String s){
ArrayAdapter<String> adapter= (ArrayAdapter<String>)listView.getAdapter();
adapter.notifyDataSetChanged();
}*/
}
package com.example.salman.q85;
导入android.os.Bundle;
导入android.support.design.widget.TabLayout;
导入android.support.v4.view.ViewPager;
导入android.support.v7.app.AppActivity;
导入android.support.v7.widget.Toolbar;
导入android.view.Menu;
导入android.view.MenuItem;
公共类MainActivity扩展了AppCompatActivity{
@凌驾
创建时受保护的void(Bundle savedInstanceState){
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
Toolbar Toolbar=(Toolbar)findViewById(R.id.Toolbar);
设置支持操作栏(工具栏);
TabLayout TabLayout=(TabLayout)findViewById(R.id.tab_布局);
tabLayout.addTab(tabLayout.newTab().setText(“Tab1”));
tabLayout.addTab(tabLayout.newTab().setText(“Tab2”));
tabLayout.setTabGravity(tabLayout.GRAVITY\u-FILL);
final ViewPager ViewPager=(ViewPager)findViewById(R.id.pager);
最终FAdapter适配器=新的FAdapter(getSupportFragmentManager(),tabLayout.getTabCount());
viewPager.addOnPageChangeListener(新建TabLayout.TabLayoutOnPageChangeListener(TabLayout));
viewPager.setAdapter(适配器);
tabLayout.setOnTabSelectedListener(新的tabLayout.OnTabSelectedListener(){
@凌驾
已选择的公共选项卡(TabLayout.Tab){
setCurrentItem(tab.getPosition());
}
@凌驾
已选择的公共选项卡(TabLayout.Tab){
}
@凌驾
已重新选择公共选项卡(TabLayout.Tab){
}
});
}
@凌驾
公共布尔onCreateOptions菜单(菜单){
//为菜单充气;这会将项目添加到操作栏(如果存在)。
getMenuInflater().充气(右菜单菜单菜单主菜单);
返回true;
}
@凌驾
公共布尔值onOptionsItemSelected(菜单项项){
//处理操作栏项目单击此处。操作栏将
//自动处理Home/Up按钮上的点击,只要
//在AndroidManifest.xml中指定父活动时。
int id=item.getItemId();
//noinspection SimplifiableIf语句
if(id==R.id.action\u设置){
返回true;
}
返回super.onOptionsItemSelected(项目);
}
}
包com.example.salman.q85;
导入android.os.Bundle;
导入android.support.annotation.Nullable;
导入android.view.LayoutInflater;
导入android.view.view;
导入android.view.ViewGroup;
导入android.widget.Button;
导入android.widget.EditText;
/**
*由Salman于2015年11月23日创建。
*/
公共类Fragment1扩展了android.support.v4.app.Fragment{
私有静态编辑文本;
@可空
@凌驾
CreateView上的公共视图(布局、充气机、视图组容器、捆绑包保存状态){
视图=充气机。充气(R.layout.frag1,容器,假);
Button Button=(Button)view.findViewById(R.id.Button);
editText=(editText)view.findViewById(R.id.editText);
setOnClickListener(新视图.OnClickListener(){
@凌驾
公共void onClick(视图v){
/*字符串数据=editText.getText().toString();
*//*
Fragment2 Fragment=新的Fragment2();
Bundle=新Bundle();
bundle.putString(“n”,数据)*//*
*/
getdata();
editText.setText(“”);
/*
字符串数据=text.getText().toString();
Fragment2 fragment=(Fragment2)getFragmentManager().findFragmentById(R.id.Fragment2);
框架补充(数据);
text.setText(“”);;
*/
}
});
返回视图;
}
公共字符串getdata(){
字符串s;
s=editText.getText().toString();
返回s;
}
}
包com.example.salman.q85;
导入android.os.Bundle;
导入android.support.annotation.Nullable;
导入android.support.v4.app.Fragment;
导入android.view.LayoutInflater;
导入android.view.view;
导入android.view.ViewGroup;
导入android.widget.ArrayAdapter;
导入android.widget.ListView;
导入java.util.ArrayList;
/**
*由Salman于2015年11月23日创建。
*/
公共类Fragment2扩展了Fragment{
列表视图列表视图;
数组列表项;
视图;
@可空
@凌驾
CreateView上的公共视图(布局、充气机、视图组容器、捆绑包保存状态){
视图=充气机。充气(R.layout.frag2,容器,假);
listView=(listView)view.findViewById(R.id.listView);
items=newarraylist();
listView=(listView)view.findViewById(R.id.listView);
setAdapter(新的ArrayAdapter(getActivity(),android.R.layout.simple_list_item_1,items));
Fragment1 f1=新的Fragment1();
字符串数据=f1.getdata();
添加(数据);
返回视图;
}
/*公共void adddata(字符串s){
ArrayAdapter=(ArrayAdapter)listView.getAdapter();
adapter.notifyDataSetChanged();
}*/
}
xml
>
在Fragment2类中添加构造函数
String data;
public Fragment2(String data) {
this.data = data;
}
Fragment1 f1= new Fragment1(data);
在Fragment1中,将该字符串传递给构造函数
String data;
public Fragment2(String data) {
this.data = data;
}
Fragment1 f1= new Fragment1(data);
在你的片段2中
Fragment newFragment = new Fragment1( );
Bundle bundle = new Bundle( );
bundle.putStringArrayList( "strings", getData( ) );
fragment.setArguments( bundle );
FragmentManager fragmentManager = getActivity( );
fragmentManager.beginTransaction( ).replace( R.id.activity_main, newFragment ).commit( );
在片段1中接收捆绑包
@Override
public View onCreateView( LayoutInflater inflater, ViewGroup container, Bundle savedInstanceState )
{
view = inflater.inflate( R.layout.fragment1, container, false );false );
if ( savedInstanceState == null )
{
Bundle extras = getArguments( );
dataStrings = extras.getStringArrayList( "strings" );
}
return view;
}
您在哪里添加/替换片段1和片段2…?可能重复@SarithG我不想替换片段。其中有两个选项卡..我只想在
@Override
public View onCreateView( LayoutInflater inflater, ViewGroup container, Bundle savedInstanceState )
{
view = inflater.inflate( R.layout.fragment1, container, false );false );
if ( savedInstanceState == null )
{
Bundle extras = getArguments( );
dataStrings = extras.getStringArrayList( "strings" );
}
return view;
}