我正在尝试启动一个在后台运行的服务，该服务正在侦听ACTION_SCREEN_OFF当它发现ACTION_SCREEN_OFF，开始我的活动。
我在某处读到你需要创建一个广播接收器因为将其放入清单 XML 中是行不通的。然而，经过多次搜索后，我不知道从哪里开始。
你不能声明ACTION_SCREEN_ON and ACTION_SCREEN_OFF in the AndroidManifest.xml。
您只能在活动进行时捕捉它们。
这是一个例子。
The 广播接收器:
public class ScreenReceiver extends BroadcastReceiver {
public static boolean wasScreenOn = true;
@Override
public void onReceive(final Context context, final Intent intent) {
if (intent.getAction().equals(Intent.ACTION_SCREEN_OFF)) {
// do whatever you need to do here
wasScreenOn = false;
} else if (intent.getAction().equals(Intent.ACTION_SCREEN_ON)) {
// and do whatever you need to do here
wasScreenOn = true;
}
}
}
The Activity:
public class ExampleActivity extends Activity {
private BroadcastReceiver mReceiver = null;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
// initialize receiver
final IntentFilter filter = new IntentFilter(Intent.ACTION_SCREEN_ON);
filter.addAction(Intent.ACTION_SCREEN_OFF);
mReceiver = new ScreenReceiver();
registerReceiver(mReceiver, filter);
// your code
}
@Override
protected void onPause() {
// when the screen is about to turn off
if (ScreenReceiver.wasScreenOn) {
// this is the case when onPause() is called by the system due to a screen state change
Log.e("MYAPP", "SCREEN TURNED OFF");
} else {
// this is when onPause() is called when the screen state has not changed
}
super.onPause();
}
@Override
protected void onResume() {
super.onResume();
// only when screen turns on
if (!ScreenReceiver.wasScreenOn) {
// this is when onResume() is called due to a screen state change
Log.e("MYAPP", "SCREEN TURNED ON");
} else {
// this is when onResume() is called when the screen state has not changed
}
}
@Override
protected void onDestroy() {
if (mReceiver != null) {
unregisterReceiver(mReceiver);
mReceiver = null;
}
super.onDestroy();
}
}
您可能可以通过聆听这些事件来解决您的问题Service.
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