android 监听系统新安装程序的广播

private class MyReceiver extends BroadcastReceiver{
		@Override
		public void onReceive(Context context, Intent intent) {
			// TODO Auto-generated method stub
			if(intent.getAction().equals(Intent.ACTION_PACKAGE_ADDED)){
				//Toast.makeText(context, intent.getDataString().substring(8), 2000).show();
				String packName = intent.getDataString().substring(8);
				//packName为所安装的程序的包名
				packagNameList.add(packName);				
			}
		}
	}

       //监听系统新安装程序的广播
        receiver = new MyReceiver();
        IntentFilter filter = new IntentFilter(Intent.ACTION_PACKAGE_ADDED);
        filter.addDataScheme("package");    //必须添加这项，否则拦截不到广播
        registerReceiver(receiver, filter);