仿微信长按选项删除该聊天和置顶该聊天ContextMenu

来源：互联网发布：冰原狙击淘宝有没有cdk 编辑：程序博客网时间：2024/04/29 10:02
接下来是代码内容
package com.example.contenxtmenu;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.widget.AdapterView.AdapterContextMenuInfo;import android.widget.ArrayAdapter;import android.widget.ListView;import android.widget.Toast;import android.view.ContextMenu.ContextMenuInfo;public class MainActivity extends ListActivity {ArrayList<String>list;ArrayAdapter adapter;@Overrideprotected void onCreate(Bundle savedInstanceState) {super.onCreate(savedInstanceState);//setContentView(R.layout.activity_main);//TextView text=(TextView) findViewById(R.id.text);//text.setOnCreateContextMenuListener(this);//ImageView imageview=(ImageView) findViewById(R.id.inmager);//imageview.setOnCreateContextMenuListener(this);list=new ArrayList<String>();for(int i=0;i<50;i++){list.add("测试的微信数据"+i);}adapter=new ArrayAdapter(this,android.R.layout.simple_list_item_1,list);this.setListAdapter(adapter);ListView lv=this.getListView();lv.setOnCreateContextMenuListener(this);}@Overridepublic void onCreateContextMenu(ContextMenu menu, View v, ContextMenuInfo menuInfo) {menu.add(1, 1001, 0, "标记未读");menu.add(1, 1002, 1, "置顶该聊天");menu.add(1, 1003, 2, "删除该聊天");super.onCreateContextMenu(menu, v, menuInfo);}@Overridepublic boolean onContextItemSelected(MenuItem item) {AdapterContextMenuInfo info=(AdapterContextMenuInfo) item.getMenuInfo();int a=info.position;int id=item.getItemId();if(id==1001){Toast.makeText(getApplicationContext(), "已标记未读成功", Toast.LENGTH_SHORT).show();}if(id==1002){//置顶的逻辑 先把当前的删除，得到的一个对象，然后在把这个对象添加到顶部，用数组下标的方式置顶到0的位置。String b=list.remove(a);list.add(0, b);adapter.notifyDataSetChanged();Toast.makeText(getApplicationContext(), "置顶成功", Toast.LENGTH_SHORT).show();}if(id==1003){list.remove(a);adapter.notifyDataSetChanged();Toast.makeText(getApplicationContext(), "删除该聊天成功", Toast.LENGTH_SHORT).show();}return super.onContextItemSelected(item);}}
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