Android 3.0 的列表片段(ListFragment)

- 建立新的XML文件, /res/layout/listfragment.xml.

<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
  android:orientation="vertical"
  android:layout_width="match_parent"
  android:layout_height="match_parent"
  android:background="#101010">

  <ListView android:id="@id/android:list"
      android:layout_width="match_parent"
      android:layout_height="0dip"
      android:layout_weight="1"/>
  <TextView android:id="@id/android:empty"
      android:layout_width="match_parent"
      android:layout_height="match_parent"
      android:text="No data"/>
</LinearLayout>

- 擴展ListFragment, 建立新的MyListFragment.java類.

package com.Android3ListFragment;

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

public class MyListFragment extends ListFragment {
 
 String[] month ={
   "January", "February", "March", "April",
   "May", "June", "July", "August",
   "September", "October", "November", "December"};

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

 @Override
 public void onCreate(Bundle savedInstanceState) {
  super.onCreate(savedInstanceState);

  setListAdapter(new ArrayAdapter<String>(
    getActivity(),
    android.R.layout.simple_list_item_1,
    month));
 }

}

- 修改main.xml.

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

  <TextView
      android:layout_height="wrap_content"
      android:layout_width="0px"
      android:layout_weight="3"
      android:text="@string/hello" />
  <fragment
      class="com.Android3ListFragment.MyListFragment"
      android:id="@+id/mylistfragment"
      android:layout_width="0px"
      android:layout_weight="1"
      android:layout_height="match_parent"/>

</LinearLayout>

主Activity使用自動生成的代碼便可以:

package com.Android3ListFragment;

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

public class Android3ListFragmentActivity extends Activity {
    /** Called when the activity is first created. */
    @Override
    public void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.main);
    }
}

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