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我目前正試圖弄清楚,如何在android中獲取屏幕開/關事件。目前,只要MainActivity處於運行狀態,它就會工作。但是,只要我關閉活動,不知何故服務器和接收器停止工作(我沒有得到任何日誌消息了)。我想這個問題與某種接收機的動態註冊有關。只要應用程序關閉,接收器就會取消註冊(?)。我怎樣才能保持接收器活着? (在Manifest文件中聲明接收器是不可能的)。在應用程序未運行時獲取屏幕開/關事件
我得到了下面的代碼:
主要活動:
public class MainActivity extends Activity {
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
startService(new Intent(getApplicationContext(), ScreenOnOffService.class));
}
}
ScreenReceiver:
public class ScreenReceiver extends BroadcastReceiver {
@Override
public void onReceive(final Context context, final Intent intent) {
Log.e("test","onReceive");
if (intent.getAction().equals(Intent.ACTION_SCREEN_OFF)) {
Log.d("test","Screen Off ");
} else if (intent.getAction().equals(Intent.ACTION_SCREEN_ON)) {
Log.d("test","Screen On ");}
}
}
ScreenOnOffService:
public class ScreenOnOffService extends Service {
//Some unimportant code
@Override
public int onStartCommand(Intent intent, int flags, int startId) {
final IntentFilter filter = new IntentFilter(Intent.ACTION_SCREEN_ON);
filter.addAction(Intent.ACTION_SCREEN_OFF);
filter.addAction(Intent.ACTION_USER_PRESENT);
final BroadcastReceiver mReceiver = new ScreenReceiver();
registerReceiver(mReceiver, filter);
return super.onStartCommand(intent, flags, startId);
}
}
AndroidManifest:
<?xml version="1.0" encoding="utf-8"?>
<application
android:allowBackup="true"
android:icon="@drawable/ic_launcher"
android:label="@string/app_name"
android:theme="@style/AppTheme" >
<activity
android:name="ch.ethz.inf.thesis.screenonoffproject.app.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>
<service android:name=".ScreenOnOffService">
</service>
</application>
</manifest>
我缺少的東西讓我的服務還活着嗎?我希望有人能幫助我。
看一看[這裏](http://stackoverflow.com/questions/8713361/keep-a-service-running-even-when -phone-是-睡着)。 –
嘿史蒂夫,我想這不能解決我的問題(如果我沒有誤解某件事情):問題不在於我的服務在睡眠事件中停止運行,更多的是接收器不再工作。我猜想在關閉應用程序後它會被取消註冊。 – DonMushroom
嘿史蒂夫再次,對不起,我錯了。它確實幫了我很多:D – DonMushroom