微信 未读 置顶 删除 的简单实现

微信 未读 置顶 删除 的简单实现：

package com.example.meun;

import java.util.ArrayList;

import android.app.ListActivity;
import android.os.Bundle;
import android.view.ContextMenu;
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.Toast;

public class MainActivity extends ListActivity {
	
	private ArrayList<String> data = null;
	private ArrayAdapter adapter;

	@Override
	protected void onCreate(Bundle savedInstanceState) {
		super.onCreate(savedInstanceState);
		//setContentView(R.layout.activity_main);
		
		data = new ArrayList<String>();
		for(int i=0;i<20;i++){
			data.add("微信消息"+i);
		}
		
		
		adapter=new ArrayAdapter(this,android.R.layout.simple_list_item_1,data);
		this.setListAdapter(adapter);
		
		ListView lv = this.getListView();
		lv.setAdapter(adapter);
		lv.setOnCreateContextMenuListener(this);
		
	}

	@Override
	public boolean onContextItemSelected(MenuItem item) {
		
		AdapterContextMenuInfo info = (AdapterContextMenuInfo) item.getMenuInfo();
		int pos = info.position;
		
		int id=item.getItemId();
		if(id==1001){
			Toast.makeText(this, "该消息还未读", Toast.LENGTH_SHORT).show();
		}
		
		if(id == 1002){
			String temp = data.get(pos);
			data.remove(pos);
			data.add(0,temp);
			adapter.notifyDataSetChanged();
		}
		
		if(id == 1003){
			data.remove(pos);
			
			adapter.notifyDataSetChanged();
		}
		
		return super.onContextItemSelected(item);
	}
	
	
	@Override
	public void onCreateContextMenu(ContextMenu menu, View v,ContextMenuInfo menuInfo) {
		
		menu.add(1, 1001, 0, "标为未读");
		menu.add(1, 1002, 1, "置顶聊天");
		menu.add(1, 1003, 2, "删除该聊天");
		
		super.onCreateContextMenu(menu, v, menuInfo);
	}
}