菜单（四）给ListView的item添加上下文菜单

<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="com.example.contextmenu.MainActivity" >

<ListView
android:id="@+id/listView1"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:layout_alignParentLeft="true"
android:layout_alignParentTop="true" >
</ListView>

</RelativeLayout>

package com.example.contextmenu;

import java.util.ArrayList;
import java.util.List;

import android.app.Activity;
import android.os.Bundle;
import android.view.ContextMenu;
import android.view.Menu;
import android.view.MenuInflater;
import android.view.MenuItem;
import android.view.View;
import android.view.ContextMenu.ContextMenuInfo;
import android.widget.ArrayAdapter;
import android.widget.ListView;
import android.widget.Toast;

public class MainActivity extends Activity {

private ListView listView;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
listView = (ListView) findViewById(R.id.listView1);
ArrayAdapter<String> arrayAdapter =
new ArrayAdapter<String>(MainActivity.this,
android.R.layout.simple_list_item_1,getData());
listView.setAdapter(arrayAdapter);
registerForContextMenu(listView);//给listview注册上下文菜单
}

public List<String> getData(){
List<String> list = new ArrayList<String>();
for(int i = 1; i < 10; i++){
list.add("list " + i);
}
return list;
}
@Override
public void onCreateContextMenu(ContextMenu menu, View v,
ContextMenuInfo menuInfo) {
// 加载xml中的上下文菜单
super.onCreateContextMenu(menu, v, menuInfo);
MenuInflater menuInflater = getMenuInflater();
menuInflater.inflate(R.menu.main, menu);
}
@Override
public boolean onContextItemSelected(MenuItem item) {
switch (item.getItemId()) {
case R.id.edit:
Toast.makeText(MainActivity.this, "编辑操作", Toast.LENGTH_SHORT).show();
break;
case R.id.share:
Toast.makeText(MainActivity.this, "分享操作", Toast.LENGTH_SHORT).show();
break;
case R.id.delete:
Toast.makeText(MainActivity.this, "删除操作", Toast.LENGTH_SHORT).show();
break;
default:
break;
}
return super.onContextItemSelected(item);
}
}

res/menu/main.xml

<menu xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:tools="http://schemas.android.com/tools"
tools:context="com.example.contextmenu.MainActivity" >

<item
android:id="@+id/edit"
android:orderInCategory="100"
android:showAsAction="never"
android:title="编辑"/>
<item
android:id="@+id/share"
android:orderInCategory="100"
android:showAsAction="never"
android:title="分享"/>
<item
android:id="@+id/delete"
android:orderInCategory="100"
android:showAsAction="never"
android:title="删除"/>

</menu>