Android

android在安装应用程序与卸载应用程序时都会发送广播，安装应用程序成功时会发送android.intent.action.PACKAGE_ADDED广播，可以通过intent.getDataString()获取安装应用的包名。当卸载应用程序成功时，系统会发送android.intent.action.PACKAGE_REMOVED广播，同样可以通过intetn.getDataString()获取应用的包名。

所以需要自定义一个BroadcastReceiver来对系统广播进行监听与处理。

1、自定义广播
自定义AppChangeTestReceiver继承自BroadcastReceiver,实现其onReceive()方式，具体代码如下。

public class AppChangTestReceiver extends BroadcastReceiver{

@Override

public void onReceive(Context context, Intent intent) {

    final String action = intent.getAction();

    if(Intent.ACTION_PACKAGE_ADDED.equals(action)) {

        Log.i("AAA",">>>>>>>>>>>>>>>>>>>package added");

    } else if (Intent.ACTION_PACKAGE_REMOVED.equals(action)) {

        Log.i("AAA",">>>>>>>>>>>>>>>>>>>package removed");

    }

	}

}

2、注册监听
1)XML方式：在AndroidManifest.xml的配置文件Application节点下，注册自定义的AppChangeTestReceiver,其生命周期默认是整个应用的生命周期

<?xml version="1.0" encoding="utf-8"?>

<application

    android:allowBackup="true"

    android:icon="@mipmap/ic_launcher"

    android:label="@string/app_name"

    android:theme="@style/AppTheme" >

    <activity

        android:name=".HomeActivity"

        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=".receiver.AppChangTestReceiver">

        <intent-filter>

            <action android:name="android.intent.action.PACKAGE_ADDED"/>

            <action android:name="android.intent.action.PACKAGE_REMOVED"/>

            <data android:scheme="package"/>

        </intent-filter>

    </receiver>

</application>

</manifest>

2）代码中动态注册：一般在Activity的onStart()方法中进行注册，在onStop或者在onDestroy方法中进行注销，其生命周期是Activity的生命周期。

   @Override

protected void onStart() {

    super.onStart();

    IntentFilter intentFilter = new IntentFilter();

    intentFilter.addAction(Intent.ACTION_PACKAGE_ADDED);

    intentFilter.addAction(Intent.ACTION_PACKAGE_REMOVED);

    intentFilter.addDataScheme("package");

    registerReceiver(mReceiver, intentFilter);

}

@Override

protected void onDestroy() {

    super.onDestroy();

    unregisterReceiver(mReceiver);

}

private BroadcastReceiver mReceiver = new BroadcastReceiver() {

    @Override

    public void onReceive(Context context, Intent intent) {

        final String action = intent.getAction();

        if(Intent.ACTION_PACKAGE_ADDED.equals(action)) {

            Log.i("AAA","####################-------package added");

        } else if(Intent.ACTION_PACKAGE_REMOVED.equals(action)) {

            Log.i("AAA","###################----------package removed");

        }

    }

};