14 ListFragment 代码案例

• MainActivity.java:

package com.qf.day14_fragment_demo9_list;
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);
    }

    @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;
    }

}

• MyListFragment对象:

  package com.qf.day14_fragment_demo9_list.fragment;
  
  import java.util.ArrayList;
  import java.util.List;
  
  import com.qf.day14_fragment_demo9_list.R;
  
  import android.annotation.SuppressLint;
  import android.app.ListFragment;
  import android.os.Bundle;
  import android.view.LayoutInflater;
  import android.view.View;
  import android.view.ViewGroup;
  import android.widget.ArrayAdapter;
  import android.widget.ListView;
  import android.widget.Toast;
  
  @SuppressLint("NewApi")
  public class MyListFragment extends ListFragment{
  
      @Override
      public View onCreateView(LayoutInflater inflater, ViewGroup container,
              Bundle savedInstanceState) {
          // TODO Auto-generated method stub
  
          View view = inflater.inflate(R.layout.layout, container, false);
  
          List<String> list = new ArrayList<String>();
          for(int i=0;i<20;i++){
              list.add("G20"+i);
          }
  
          ArrayAdapter<String> adapter =  new ArrayAdapter<String>
          (getActivity(), android.R.layout.simple_list_item_1, list);
  
          //设置数据源
          setListAdapter(adapter);
  
          return view;
      }
  
      //ListView 的点击事件
      @Override
      public void onListItemClick(ListView l, View v, int position, long id) {
          // TODO Auto-generated method stub
          super.onListItemClick(l, v, position, id);
  
          Toast.makeText(getActivity(), "===>"+position, 0).show();
      }
  
  }
  

• activity_main.xml:

  <RelativeLayout 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"
      android:paddingBottom="@dimen/activity_vertical_margin"
      android:paddingLeft="@dimen/activity_horizontal_margin"
      android:paddingRight="@dimen/activity_horizontal_margin"
      android:paddingTop="@dimen/activity_vertical_margin"
      tools:context=".MainActivity" >
  
      <fragment
          android:id="@+id/ft"
          android:name="com.qf.day14_fragment_demo9_list.fragment.MyListFragment"
          android:layout_width="match_parent"
          android:layout_height="match_parent"
          />
  
  </RelativeLayout>
  

• listfragment的填充对象（layout.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:paddingLeft="8dp"
   android:paddingRight="8dp">
  <!--必须设定id为@id/android:list 这样可以在listfragme中直接设置setadapter-->
  <ListView android:id="@id/android:list"
         android:layout_width="match_parent"
         android:layout_height="match_parent"
         android:background="#00FF00"
         android:layout_weight="1"
         android:drawSelectorOnTop="false"/>
  
  <TextView android:id="@id/android:empty"
         android:layout_width="match_parent"
         android:layout_height="match_parent"
         android:background="#FF0000"
         android:text="No data"/>
  </LinearLayout>