我试图开发一款使用手机加速度计的安卓应用程序。除了华为手机（在P9上测试）之外，它在任何地方都可以正常工作。我勾选了“保持黑屏运行”选项，并启用了电池优化器来保护应用程序。
我无法找到解决方案，所以向您请教 :-) 这是我的活动：
public class MainActivity extends AppCompatActivity {
private static final String TAG = "MainActivity";
private MyService mService;
private boolean mIsRunning;
private MyService.ICallback mCallback = new MyService.ICallback() {
public void changed() {
Log.i(TAG, "CHANGED");
}
};
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
}
@Override
protected void onResume() {
super.onResume();
if(!mIsRunning) {
startStepService();
}
bindStepService();
}
@Override
protected void onPause() {
super.onPause();
if(mIsRunning && mService != null) {
unbindStepService();
}
}
private ServiceConnection mConnection = new ServiceConnection() {
public void onServiceConnected(ComponentName className, IBinder service) {
mService = ((MyService.StepBinder)service).getService();
mService.registerCallback(mCallback);
}
public void onServiceDisconnected(ComponentName className) {
mService = null;
}
};
private void startStepService() {
if (! mIsRunning) {
mIsRunning = true;
startService(new Intent(MainActivity.this, MyService.class));
}
}
private void bindStepService() {
bindService(new Intent(MainActivity.this, MyService.class), mConnection, Context.BIND_AUTO_CREATE);
}
private void unbindStepService() {
unbindService(mConnection);
}
我的服务：
public class MyService extends Service {
private static final String TAG = "Test";
private SensorManager mSensorManager;
private Detector detector;
private MyDisplayer displayer;
private PowerManager.WakeLock wakeLock;
private ICallback mCallback;
private MyDisplayer.Listener mStepListener = new MyDisplayer.Listener() {
public void changed() {
passValue();
}
public void passValue() {
if (mCallback != null) {
mCallback.changed();
}
}
};
private final IBinder mBinder = new StepBinder();
public static final int MyID = 1234;
android.app.Notification Notification;
public class StepBinder extends Binder {
public MyService getService() {
return MyService.this;
}
}
@Override
public void onCreate() {
super.onCreate();
acquireWakeLock();
displayer = new MyDisplayer();
displayer.addListener(mStepListener);
registerDetector();
startServiceNotification();
}
private void registerDetector() {
mSensorManager = (SensorManager) getSystemService(SENSOR_SERVICE);
detector = new Detector();
detector.addStepListener(displayer);
Sensor mSensor = mSensorManager.getDefaultSensor(Sensor.TYPE_ACCELEROMETER);
mSensorManager.registerListener(detector, mSensor, SensorManager.SENSOR_DELAY_GAME);
}
@Override
public IBinder onBind(Intent intent) {
return mBinder;
}
public interface ICallback {
void changed();
}
public void registerCallback(ICallback cb) {
mCallback = cb;
}
private void startServiceNotification() {
NotificationCompat.Builder mBuilder = new NotificationCompat.Builder(this)
.setSmallIcon(R.drawable.logo_32)
.setContentTitle("Test")
.setPriority(Notification.PRIORITY_HIGH)
.setContentText("My Notif");
TaskStackBuilder stackBuilder = TaskStackBuilder.create(this);
Intent resultIntent = new Intent(this, MainActivity.class);
stackBuilder.addNextIntent(resultIntent);
PendingIntent resultPendingIntent = stackBuilder.getPendingIntent(0, PendingIntent.FLAG_UPDATE_CURRENT);
mBuilder.setContentIntent(resultPendingIntent);
startForeground(MyID, mBuilder.build());
}
private void acquireWakeLock() {
PowerManager pm = (PowerManager) getSystemService(Context.POWER_SERVICE);
int wakeFlags = PowerManager.PARTIAL_WAKE_LOCK;
wakeLock = pm.newWakeLock(wakeFlags, TAG);
wakeLock.acquire();
}
@Override
public int onStartCommand(Intent intent, int flags, int startId) {
return START_STICKY;
}
监听器和探测器在这个问题中没有用处，所以我没有放在这里。 谢谢你的帮助。