android 将一个上下文菜单列表视图

ContextMenuActivity.java

package com.zxl.avtivitr;

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

public class ContextMenuActivity extends Activity {


	/** Called when the activity is first created. */
    @Override
    public void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.main);
        ListView lv=(ListView) findViewById(R.id.listView1);
        String[] list=new String[]{"apple","google","baidu"};
        BaseAdapter adapter=new ArrayAdapter<String>(this,android.R.layout.simple_list_item_1,list);
        
        lv.setAdapter(adapter);
        
        registerForContextMenu(lv);
        
    }
    //右键source->Override/Implement Methods...
    @Override
	public void onCreateContextMenu(ContextMenu menu, View v, ContextMenuInfo menuInfo) {
		// TODO Auto-generated method stub
		super.onCreateContextMenu(menu, v, menuInfo);
		
		menu.add("click here");
	}
    

	@Override
	public boolean onContextItemSelected(MenuItem item) {
		// TODO Auto-generated method stub
		super.onContextItemSelected(item);
		if(item.getTitle()=="click here"){
			Toast.makeText(this, "hello world", Toast.LENGTH_LONG).show();
		}
		
		return true;
	}
    
}

main.xml

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

    <TextView
        android:id="@+id/textView1"
        android:layout_width="fill_parent"
        android:layout_height="wrap_content"
        android:text="@string/hello" />

    <ListView
        android:id="@+id/listView1"
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:layout_alignParentLeft="true"
        android:layout_alignParentTop="true"
        android:layout_below="@+id/textView1" >
    </ListView>

</RelativeLayout>

效果：

列表项长按出现菜单