Android_07_监控应用的状态

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MainActivity.java

package com.itheima.applistener;import android.os.Bundle;import android.app.Activity;import android.view.Menu;public class MainActivity extends Activity {    @Override    protected void onCreate(Bundle savedInstanceState) {        super.onCreate(savedInstanceState);        setContentView(R.layout.activity_main);    }    @Override    public boolean onCreateOptionsMenu(Menu menu) {        // Inflate the menu; this adds items to the action bar if it is present.        getMenuInflater().inflate(R.menu.main, menu);        return true;    }    }

APPStatusReceiver.java

package com.itheima.applistener;import android.content.BroadcastReceiver;import android.content.Context;import android.content.Intent;import android.net.Uri;import android.widget.Toast;public class APPStatusReceiver extends BroadcastReceiver {@Overridepublic void onReceive(Context context, Intent intent) {// TODO Auto-generated method stubString action = intent.getAction();Uri uri = intent.getData();if("android.intent.action.PACKAGE_ADDED".equals(action)){Toast.makeText(context, uri.toString() + "被安装了", 0).show();}if("android.intent.action.PACKAGE_REPLACED".equals(action)){Toast.makeText(context, uri.toString() + "被升级了", 0).show();}if("android.intent.action.PACKAGE_REMOVED".equals(action)){Toast.makeText(context, uri.toString() + "被卸载了", 0).show();}}}

activity_main.xml

<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"    xmlns:tools="http://schemas.android.com/tools"    android:layout_width="match_parent"    android:layout_height="match_parent"    android:paddingBottom="@dimen/activity_vertical_margin"    android:paddingLeft="@dimen/activity_horizontal_margin"    android:paddingRight="@dimen/activity_horizontal_margin"    android:paddingTop="@dimen/activity_vertical_margin"    tools:context=".MainActivity" >    <TextView        android:layout_width="wrap_content"        android:layout_height="wrap_content"        android:text="@string/hello_world" /></RelativeLayout>

清单文件如下：

<?xml version="1.0" encoding="utf-8"?><manifest xmlns:android="http://schemas.android.com/apk/res/android"    package="com.itheima.applistener"    android:versionCode="1"    android:versionName="1.0" >    <uses-sdk        android:minSdkVersion="8"        android:targetSdkVersion="17" />    <application        android:allowBackup="true"        android:icon="@drawable/ic_launcher"        android:label="@string/app_name"        android:theme="@style/AppTheme" >        <activity            android:name="com.itheima.applistener.MainActivity"            android:label="@string/app_name" >            <intent-filter>                <action android:name="android.intent.action.MAIN" />                <category android:name="android.intent.category.LAUNCHER" />            </intent-filter>        </activity>        <receiver android:name="com.itheima.applistener.APPStatusReceiver">            <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>    </application></manifest>

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