sensor 詳解（轉載，用以記錄）
阿新 • • 發佈：2019-02-07
mHandler = new Handler(looper) { @Override public void handleMessage(Message msg) { final SensorEvent t = (SensorEvent)msg.obj; final int handle = t.sensor.getHandle(); switch (t.sensor.getType()) {// Only report accuracy for sensors that support it. case Sensor.TYPE_MAGNETIC_FIELD: case Sensor.TYPE_ORIENTATION: // call onAccuracyChanged() only if the value changes final int accuracy = mSensorAccuracies.get(handle);if ((t.accuracy >= 0) && (accuracy != t.accuracy)) { mSensorAccuracies.put(handle, t.accuracy); mSensorEventListener.onAccuracyChanged(t.sensor, t.accuracy); }break; default: // For other sensors, just report the accuracy once if (mFirstEvent.get(handle) == false) { mFirstEvent.put(handle, true); mSensorEventListener.onAccuracyChanged( t.sensor, SENSOR_STATUS_ACCURACY_HIGH); } break; } mSensorEventListener.onSensorChanged(t); sPool.returnToPool(t); } };