41.android广播-监控应用的状态

应用有3中状态：安装，更新和卸载，因此需要3个广播：

清单文件配置如下：

        <receiver android:name="com.ldw.appstatus.apPReceiver">            <intent-filter>                <action android:name="android.intent.action.PACKAGE_ADDED"/>                <action android:name="android.intent.action.PACKAGE_REPLACED"/>                <action android:name="android.intent.action.PACKAGE_REMOVED"/>                <data android:scheme="package"/>            </intent-filter>        </receiver>监控app状态代码：
package com.ldw.appstatus;import android.content.BroadcastReceiver;import android.content.Context;import android.content.Intent;import android.net.Uri;import android.widget.Toast;public class appReceiver extends BroadcastReceiver {	@Override	public void onReceive(Context context, Intent intent) {		// TODO Auto-generated method stub		String action = intent.getAction();		Uri uri = intent.getData();//获取到应用的包名		if("android.intent.action.PACKAGE_ADDED".equals(action)){			Toast.makeText(context, uri.toString() + "被安装了", Toast.LENGTH_SHORT).show();		}		else if("android.intent.action.PACKAGE_REPLACED".equals(action)){			Toast.makeText(context, uri.toString() + "被更新了", Toast.LENGTH_SHORT).show();		}		else if("android.intent.action.PACKAGE_REMOVED".equals(action)){			Toast.makeText(context, uri.toString() + "被卸载了", Toast.LENGTH_SHORT).show();		}	}}