fragment实例

activity_mail.xml垂直方向

<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
    xmlns:tools="http://schemas.android.com/tools"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    tools:context=".MainActivity"
    android:orientation="vertical">

    <fragment 
        android:name="com.example.fragmentexample.FragmentList"
        android:id="@+id/frag_list"
        android:layout_width="fill_parent"
        android:layout_height="0dp"
        android:layout_weight="2"/>

    <fragment 
        android:name="com.example.fragmentexample.FragmentDetails"
        android:id="@+id/frag_detail"
        android:layout_width="fill_parent"
        android:layout_height="0dp"
        android:layout_weight="1"/>
</LinearLayout>

MainActivity.java

package com.example.fragmentexample;

import android.os.Bundle;
import android.app.Activity;
import android.view.Menu;

public class MainActivity extends Activity {

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

}

FragmentList.java

package com.example.fragmentexample;

import java.util.ArrayList;
import java.util.HashMap;
import java.util.List;
import java.util.Map;

import android.app.ListFragment;
import android.os.Bundle;
import android.view.LayoutInflater;
import android.view.View;
import android.view.ViewGroup;
import android.widget.ListView;
import android.widget.SimpleAdapter;

public class FragmentList extends ListFragment {

    private String[] values = new String[] { "wifi", "蓝牙", "数据", "GPS", "飞行模式" };
    private int[] images = new int[] { R.drawable.status_bar_toggle_wifi_on,
            R.drawable.status_bar_toggle_bluetooth_on,
            R.drawable.status_bar_toggle_data_on,
            R.drawable.status_bar_toggle_gps_on,
            R.drawable.status_bar_toggle_flight_mode_on };

    @Override
    public View onCreateView(LayoutInflater inflater, ViewGroup container,
            Bundle savedInstanceState) {
        return inflater.inflate(R.layout.fragment_list, container, false);
    }

    @Override
    public void onListItemClick(ListView l, View v, int position, long id) {
        FragmentDetails frag = (FragmentDetails) getFragmentManager()
                .findFragmentById(R.id.frag_detail);
        if(frag!=null&&frag.isInLayout()){
            switch(position){
            case 0:
                frag.setText("wifi");
                break;
            case 1:
                frag.setText("蓝牙");
                break;
            case 2:
                frag.setText("数据");
                break;
            case 3:
                frag.setText("gps");
                break;
            case 4:
                frag.setText("飞行模式");
                break;
            }
        }
    }

    @Override
    public void onActivityCreated(Bundle savedInstanceState) {
        super.onActivityCreated(savedInstanceState);
        List<Map<String, Object>> listItems = new ArrayList<Map<String, Object>>();
        for (int i = 0; i < values.length; i++) {
            Map<String, Object> listItem = new HashMap<String, Object>();
            listItem.put("values", values[i]);
            listItem.put("images", images[i]);
            listItems.add(listItem);
        }
        SimpleAdapter adapter = new SimpleAdapter(getActivity(), listItems,
                R.layout.list_item, new String[] { "values", "images" },
                new int[] { R.id.txt_title, R.id.img });
        setListAdapter(adapter);
    }
}

fragment_list.xml(注意：listview的id是固定写法不能写错)

<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
    xmlns:tools="http://schemas.android.com/tools"
    android:layout_width="wrap_content"
    android:layout_height="wrap_content"
    android:orientation="vertical" >

    <ListView
        android:id="@id/android:list"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content" />

</LinearLayout>

fragment_detail.xml

<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
    xmlns:tools="http://schemas.android.com/tools"
    android:layout_width="wrap_content"
    android:layout_height="wrap_content"
    tools:context=".MainActivity" >

    <TextView
        android:id="@+id/txt_detail"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content" />

</RelativeLayout>

list_item.xml

<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
    xmlns:tools="http://schemas.android.com/tools"
    android:layout_width="wrap_content"
    android:layout_height="wrap_content"
    android:orientation="horizontal"
    tools:context=".MainActivity" >

    <ImageView
        android:id="@+id/img"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content" />

    <TextView
        android:id="@+id/txt_title"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content" />

</LinearLayout>

FragmentDetails.java

package com.example.fragmentexample;

import android.app.Fragment;
import android.os.Bundle;
import android.view.LayoutInflater;
import android.view.View;
import android.view.ViewGroup;
import android.widget.TextView;

public class FragmentDetails extends Fragment {

    @Override
    public View onCreateView(LayoutInflater inflater, ViewGroup container,
            Bundle savedInstanceState) {
        return inflater.inflate(R.layout.fragment_detail, container, false);
    }

    public void setText(String item) {
        TextView txt = (TextView) getView().findViewById(R.id.txt_detail);
        txt.setText(item);
    }
}