Android项目：仿微信聊天的删除，置顶。

首先我们要重写上下文菜单方法onCreateContextMenu，从这个方法可以添加需要的条目按钮，我们要在res/menu目录下建议个weixin.xml文件：

再重写onContextItemSelected，在这个里面实现自己需要点击按钮后需要实现的逻辑业务。

java代码如下：

package com.xh.tx.menue;

import java.util.ArrayList;

import android.app.Activity;
import android.app.AlertDialog;
import android.app.ListActivity;
import android.content.DialogInterface;
import android.os.Bundle;
import android.os.Message;
import android.view.ContextMenu;
import android.view.Menu;
import android.view.MenuItem;
import android.view.View;
import android.view.ContextMenu.ContextMenuInfo;
import android.widget.AdapterView.AdapterContextMenuInfo;
import android.widget.ArrayAdapter;
import android.widget.ListView;
import android.widget.TextView;
import android.widget.Toast;

public class MainActivity extends ListActivity {
	private ArrayList date=null;
	private ArrayAdapter adapter;
	@Override
	protected void onCreate(Bundle savedInstanceState) {
		super.onCreate(savedInstanceState);
		//setContentView(R.layout.activity_main);
		//TextView tx=(TextView) findViewById(R.id.text);
		//tx.setOnCreateContextMenuListener(this);
		date=new ArrayList();
		for(int i=0;i<50;i++){
			date.add("测试数据"+i);
		}
		adapter=new ArrayAdapter(this,android.R.layout.simple_list_item_1, date);
		setListAdapter(adapter);
		ListView lv=getListView();
		lv.setOnCreateContextMenuListener(this);
	}

	@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;
	}

	@Override
	public boolean onOptionsItemSelected(MenuItem item) {
		// Handle action bar item clicks here. The action bar will
		// automatically handle clicks on the Home/Up button, so long
		// as you specify a parent activity in AndroidManifest.xml.
		int id = item.getItemId();
		switch (id) {
		case R.id.action_settings1:
			Toast.makeText(this, item.getTitle(), Toast.LENGTH_LONG).show();
			break;
		case R.id.action_settings2:
			Toast.makeText(this, item.getTitle(), Toast.LENGTH_LONG).show();
			break;
		case R.id.action_settings3:
			Toast.makeText(this, item.getTitle(), Toast.LENGTH_LONG).show();
			break;
		case R.id.action_settings4:
			Toast.makeText(this, item.getTitle(), Toast.LENGTH_LONG).show();
			break;
		
		}
		return super.onOptionsItemSelected(item);
	}
	@Override
	public void onCreateContextMenu(ContextMenu menu, View v, ContextMenuInfo menuInfo) {
		// TODO Auto-generated method stub
		getMenuInflater().inflate(R.menu.weixin, menu);
//		menu.add(1, 101, 0, "未读");
//		menu.add(1, 102, 1, "置顶");
//		menu.add(1, 103, 2, "删除");
		super.onCreateContextMenu(menu, v, menuInfo);
	}
	@Override
	public boolean onContextItemSelected(MenuItem item) {
		// TODO Auto-generated method stub
		AdapterContextMenuInfo info=(AdapterContextMenuInfo) item.getMenuInfo();
		final int pos=info.position;
		int id=item.getItemId();
		switch (id) {
		case R.id.weidu:
			Toast.makeText(this, item.getItemId()+"未读"+R.id.weidu, Toast.LENGTH_LONG).show();
			break;
		case R.id.zhiding:
			AlertDialog dialog=new AlertDialog.Builder(this).create();
			dialog.setTitle("对话框");
			dialog.setMessage("是否置顶");
			dialog.setButton(AlertDialog.BUTTON_POSITIVE, "确认", new DialogInterface.OnClickListener() {
				
				@Override
				public void onClick(DialogInterface dialog, int which) {
					// TODO Auto-generated method stub
					String s=date.remove(pos);
					date.add(0, s);
					adapter.notifyDataSetChanged();
					Toast.makeText(getApplicationContext(), "置顶成功", Toast.LENGTH_LONG).show();
				}
			});
			dialog.setButton(AlertDialog.BUTTON_NEGATIVE, "取消", new DialogInterface.OnClickListener() {
				
				@Override
				public void onClick(DialogInterface dialog, int which) {
					// TODO Auto-generated method stub
					Toast.makeText(getApplicationContext(), "取消置顶", Toast.LENGTH_LONG).show();
				}
			});	
			dialog.show();
			break;
		case R.id.shanchu:
			AlertDialog dialog1=new AlertDialog.Builder(this).create();
			dialog1.setTitle("对话框");
			dialog1.setMessage("是否确认删除内容");
			dialog1.setButton(AlertDialog.BUTTON_POSITIVE, "确认", new DialogInterface.OnClickListener() {
				
				@Override
				public void onClick(DialogInterface dialog, int which) {
					// TODO Auto-generated method stub
					date.remove(pos);
					adapter.notifyDataSetChanged();
					Toast.makeText(getApplicationContext(), "删除成功", Toast.LENGTH_LONG).show();
				}
			});
			dialog1.setButton(AlertDialog.BUTTON_NEGATIVE, "取消", new DialogInterface.OnClickListener() {
				
				@Override
				public void onClick(DialogInterface dialog, int which) {
					// TODO Auto-generated method stub
					Toast.makeText(getApplicationContext(), "取消删除", Toast.LENGTH_LONG).show();
				}
			});	
			dialog1.show();
			break;		
		}
		return super.onContextItemSelected(item);
	}
}

运行结果如下图：