我正在尝试在三星N7100上记录压力数据。
我的问题是在屏幕变暗后不会调用onSensorChanged()方法。在屏幕上一切都开始正常工作。
任何人都能指出我正确的方向吗？
尝试设置一个唤醒锁，在前台运行服务，重新注册听众，....，没有任何作用。请帮忙： - ）
//MainActivity starts service (this is just a test, not the real app I am building)
public class MainActivity extends Activity {
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
startService(new Intent(this, sensorservice.class));
}
@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;
}
}
这是服务：
public class sensorservice extends Service implements SensorEventListener{
@Override
public IBinder onBind(Intent intent) {
// TODO Auto-generated method stub
return null;
}
@Override
public void onCreate() {
}
@Override
public int onStartCommand(Intent intent, int flags, int startId) {
Notification noti = new Notification.Builder(this)
.setContentTitle("test")
.setContentText("test")
.setSmallIcon(R.drawable.ic_launcher)
.setOngoing(true)
.build();
Intent notificationIntent = new Intent(this, MainActivity.class);
PendingIntent pendingIntent = PendingIntent.getActivity(this, 0, notificationIntent, 0);
startForeground(5, noti);
PowerManager pm = (PowerManager)this.getSystemService(sensorservice.POWER_SERVICE);
PowerManager.WakeLock wl = pm.newWakeLock(PowerManager.PARTIAL_WAKE_LOCK,"Tag");
wl.acquire();
SensorManager mgr = (SensorManager) this.getSystemService(SENSOR_SERVICE);
Sensor pressuresensor = mgr.getDefaultSensor(Sensor.TYPE_PRESSURE);
mgr.registerListener(this, pressuresensor, SensorManager.SENSOR_DELAY_NORMAL);
return START_STICKY;
}
@Override
public void onAccuracyChanged(Sensor sensor, int accuracy) {
// TODO Auto-generated method stub
}
@Override
public void onSensorChanged(SensorEvent event) {
float pressure = event.values[0];
System.out.println("Pressure = "+ pressure + " hPa");
}
}