res/layout/activity_main.xml的内容:
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:orientation="horizontal" >
<fragment class="com.example.demofragment.ListFragment"
android:id="@+id/titles"
android:layout_weight="1"
android:layout_width="0px"
android:layout_height="match_parent"/>
</LinearLayout>
res/layout-land/activity_main.xml的内容:
<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:orientation="horizontal" >
<fragment class="com.example.demofragment.ListFragment"
android:id="@+id/titles"
android:layout_weight="1"
android:layout_width="0px"
android:layout_height="match_parent"/>
<FrameLayout android:id="@+id/detail"
android:layout_weight="2"
android:layout_width="0px"
android:layout_height="match_parent"/>
</LinearLayout>
用于保存标题及内容的Data类:
package com.example.demofragment;
/**
* @author cjianquan
*
*/
public final class Data {
//
public static final String[] TITLES={
"线性布局",
"表格布局",
"帧布局",
"相对布局"
};
public static final String[] DETAIL= {
"线性布局",
"表格布局",
"帧布局",
"相对布局"
};
}
列表碎片类ListFragment.java:
package com.example.demofragment;
import android.app.FragmentTransaction;
import android.content.Intent;
import android.os.Bundle;
import android.view.View;
import android.widget.ArrayAdapter;
import android.widget.ListView;
public class ListFragment extends android.app.ListFragment {
boolean dualPane;
int curCheckPosition =0 ;
public void onActivityCreated(Bundle savedInstanceState){
super.onActivityCreated(savedInstanceState);
//为列表设置适配器
setListAdapter(new ArrayAdapter<String>(getActivity(),android.R.layout.simple_list_item_checked,Data.TITLES));
//获取布局文件中添加的FragmentLayout帧布局管理器
View detailFrame = getActivity().findViewById(R.id.detail);
//判断是否在一屏上同时显示列表和详细内容
dualPane = detailFrame != null &&
detailFrame.getVisibility() == View.VISIBLE;
if(savedInstanceState!=null){
//更新当前选择的索引位置
curCheckPosition = savedInstanceState.getInt("curChoice", 0);
}
if(dualPane){
//如果在一屏上同时显示列表和详细内容
//设置列表为单选模式
getListView().setChoiceMode(ListView.CHOICE_MODE_SINGLE);
//显示详细内容
showDetails(curCheckPosition);
}
}
//保存当前选中的列表项的索引值
public void onSaveInstanceSate(Bundle outState){
super.onSaveInstanceState(outState);
outState.putInt("curChoice", curCheckPosition);
}
public void onListItemClick(ListView l,View v,int position,long id){
showDetails(position);//调用showDetails方法显示 详细内容
}
void showDetails(int index){
//更新保存当前索引位置的变量的值为当前选中值
curCheckPosition = index;
if(dualPane){//当在一屏上同时显示列表和详细内容时
//设置选中列表为选中状态
getListView().setItemChecked(index, true);
//获取 用于显示详细内容的fragment
DetailFragment details = (DetailFragment)getFragmentManager().findFragmentById(R.id.detail);
if(details == null || details.getShownIndex() != index){
//创建一个新的DetailFragment实例用于显示当前选择项对应的详细内容
details = DetailFragment.newInstance(index);
//要在activity中管理fragment,需要使用FragmentManager
FragmentTransaction ft = getFragmentManager().beginTransaction();
//替换原来显示的详细内容
ft.replace(R.id.detail, details);
//设置转换效果
ft.setTransitionStyle(FragmentTransaction.TRANSIT_FRAGMENT_FADE);
ft.commit();
}
}else{//在一屏上只能显示列表或详细内容的一个内容时
//使用一个新的activity显示详细内容
Intent intent = new Intent(getActivity(),MainActivity.DetailActivity.class);
intent.putExtra("index",index);
startActivity(intent);
}
}
}
详细内容碎片类DetailFragment.java:
package com.example.demofragment;
import android.app.Fragment;
import android.os.Bundle;
import android.view.LayoutInflater;
import android.view.View;
import android.view.ViewGroup;
import android.widget.ScrollView;
import android.widget.TextView;
public class DetailFragment extends Fragment {
public static DetailFragment newInstance(int index){
DetailFragment f = new DetailFragment();
Bundle bundle = new Bundle();
bundle.putInt("index", index);
f.setArguments(bundle);
return f;
}
public int getShownIndex(){
return getArguments().getInt("index",0);
}
public View onCreateView(LayoutInflater inflater,ViewGroup container,Bundle savedInstanceSate){
if(container == null){
return null;
}
ScrollView scroller = new ScrollView(getActivity());
TextView text = new TextView(getActivity());
text.setPadding(10, 10, 10, 10);
text.setTextSize(30);
scroller.addView(text);
text.setText(Data.DETAIL[getShownIndex()]);
return scroller;
}
}
主入口类及用于显示详细内容的activity: MainActivity.java
package com.example.demofragment;
import android.os.Bundle;
import android.app.Activity;
import android.content.res.Configuration;
import android.view.Menu;
public class MainActivity extends Activity {
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
}
@Override
public boolean onCreateOptionsMenu(Menu menu) {
// Inflate the menu; this adds items to the action bar if it is present.
getMenuInflater().inflate(R.menu.main, menu);
return true;
}
public static class DetailActivity extends Activity {
protected void onCreate(Bundle savedInstanceState){
super.onCreate(savedInstanceState);
//判断是否为横屏,如果为横屏,则结束当前Activity,准备使用Fragment显示详细内容
if(getResources().getConfiguration().orientation == Configuration.ORIENTATION_LANDSCAPE){
finish();
return;
}
if(savedInstanceState == null){
DetailFragment details = new DetailFragment();
details.setArguments(getIntent().getExtras());
getFragmentManager().beginTransaction().add(android.R.id.content, details).commit();
}
}
}
}
AndroidManifest.xml文件内容如下:
<?xml version="1.0" encoding="utf-8"?>
<manifest xmlns:android="http://schemas.android.com/apk/res/android"
package="com.example.demofragment"
android:versionCode="1"
android:versionName="1.0" >
<uses-sdk
android:minSdkVersion="14"
android:targetSdkVersion="19" />
<application
android:allowBackup="true"
android:icon="@drawable/ic_launcher"
android:label="@string/app_name"
android:theme="@style/AppTheme" >
<activity
android:name="com.example.demofragment.MainActivity"
android:label="@string/app_name" >
<intent-filter>
<action android:name="android.intent.action.MAIN" />
<category android:name="android.intent.category.LAUNCHER" />
</intent-filter>
</activity>
<span style="color:#ff0000;"><activity android:name="com.example.demofragment.MainActivity$DetailActivity"
android:label="详细内容"/></span>
</application>
</manifest>
横屏时的结果图:
转载于:https://my.oschina.net/u/2552902/blog/543992