ContextMenu上下文菜单

上下文菜单一般是真针对ListView(多条数据的操作)

　　需求：在ListView中显示通话记录的电话号码，长按显示的上下文菜单为复制号码到拨号盘、发送信息、复制号码，与之相对应的事件。

　　

布局代码：

　　

 <LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"

     android:layout_width="match_parent"

     android:layout_height="match_parent"

     android:orientation="vertical" >

     <ListView

         android:id="@+id/listview"

         android:layout_width="fill_parent"

         android:layout_height="fill_parent" />

 </LinearLayout>

MainActivity

 package com.android.hzy.contextmenu;

 import android.app.Activity;

 import android.content.Context;

 import android.content.Intent;

 import android.database.Cursor;

 import android.graphics.Color;

 import android.net.Uri;

 import android.os.Bundle;

 import android.provider.CallLog.Calls;

 import android.text.ClipboardManager;

 import android.view.ContextMenu;

 import android.view.ContextMenu.ContextMenuInfo;

 import android.view.MenuItem;

 import android.view.View;

 import android.view.ViewGroup;

 import android.widget.AdapterView.AdapterContextMenuInfo;

 import android.widget.CursorAdapter;

 import android.widget.ListView;

 import android.widget.TextView;

 public class MainActivity extends Activity {

     private static final int MENU_DIAL_ID = 0;

     private static final int MENU_SMS_ID = 1;

     private static final int MENU_COPY_ID = 2;

     private ListView listview;

     private MyAdapter adapter;

     @Override

     protected void onCreate(Bundle savedInstanceState) {

         super.onCreate(savedInstanceState);

         setContentView(R.layout.activity_main);

         listview = (ListView) findViewById(R.id.listview);

         Cursor c = getContentResolver().query(Calls.CONTENT_URI, new String[]{Calls._ID,Calls.NUMBER}, null, null, null);

         adapter = new MyAdapter(this, c);

         // 如果数据是来自于手机本身的数据库   使用CursorAdapter的子类

         listview.setAdapter(adapter);

         // 给listview注册上下文菜单

         registerForContextMenu(listview);

     }

     /**

      * 创建上下文菜单

      */

     @Override

     public void onCreateContextMenu(ContextMenu menu, View v,

             ContextMenuInfo menuInfo) {

         // TODO Auto-generated method stub

         menu.add(0, MENU_DIAL_ID, 0, "复制号码到拨号盘");

         menu.add(0, MENU_SMS_ID, 0, "发送短信");

         menu.add(0, MENU_COPY_ID, 0, "复制号码");

         super.onCreateContextMenu(menu, v, menuInfo);

     }

     /**

      * 上下文菜单被选择

      */

     @Override

     public boolean onContextItemSelected(MenuItem item) {

         // TODO Auto-generated method stub

         AdapterContextMenuInfo acmi = (AdapterContextMenuInfo) item.getMenuInfo();

         int position = acmi.position;

         Cursor cursor = (Cursor) adapter.getItem(position);

         String number = cursor.getString(cursor.getColumnIndex(Calls.NUMBER));

         int id = item.getItemId();

         Intent intent = null;

         switch (id) {

         case MENU_DIAL_ID:

             intent = new Intent();

             intent.setAction(Intent.ACTION_DIAL);

             intent.setData(Uri.parse("tel:"+number));

             startActivity(intent);

             break;

         case MENU_SMS_ID:

             intent = new Intent();

             intent.setAction(Intent.ACTION_SENDTO);

             intent.setData(Uri.parse("smsto:"+number));

             startActivity(intent);

             break;

         case MENU_COPY_ID:

             // 得到剪贴版服务

             ClipboardManager cm = (ClipboardManager) getSystemService(Context.CLIPBOARD_SERVICE);

             // 将内容放到剪贴版本中

             cm.setText(number);

             break;

         default:

             break;

         }

         return super.onContextItemSelected(item);

     }

     private final class MyAdapter extends CursorAdapter{

         public MyAdapter(Context context, Cursor c) {

             super(context, c);

             // TODO Auto-generated constructor stub

         }

         // 创建item的布局

         @Override

         public View newView(Context context, Cursor cursor, ViewGroup parent) {

             // TODO Auto-generated method stub

             TextView tv = new TextView(context);

             tv.setTextSize(22);

             tv.setTextColor(Color.WHITE);

             return tv;

         }

         // 绑定数据

         @Override

         public void bindView(View view, Context context, Cursor cursor) {

             // TODO Auto-generated method stub

             // 得到数据 电话号码

             String number = cursor.getString(cursor.getColumnIndex(Calls.NUMBER));

             TextView tv = (TextView) view;

             tv.setText(number);

         }

     }

 }

注：清单文件中需要添加权限

<uses-permission android:name="android.permission.READ_CONTACTS"/>