该功能在系统设置-显示-拿起设备时唤醒

alps\vendor\mediatek\proprietary\packages\apps\MtkSettings\src\com\android\settings\display\LiftToWakePreferenceController.javapublic boolean isAvailable() {SensorManager sensors = (SensorManager) mContext.getSystemService(Context.SENSOR_SERVICE);return sensors != null && sensors.getDefaultSensor(Sensor.TYPE_WAKE_GESTURE) != null;
}

 通过以上代码可以控制该功能是不是在设置中显示，也可以看出来用到的sensor是Sensor.TYPE_WAKE_GESTURE，当然这个sensor是需要驱动配置好之后，上层才可以正常的控制该功能的开启和关闭。

alps\frameworks\base\core\java\android\hardware\SensorManager.javapublic Sensor getDefaultSensor(int type) {// TODO: need to be smarter, for now, just return the 1st sensorList<Sensor> l = getSensorList(type);boolean wakeUpSensor = false;// For the following sensor types, return a wake-up sensor. These types are by default// defined as wake-up sensors. For the rest of the SDK defined sensor types return a// non_wake-up version.if (type == Sensor.TYPE_PROXIMITY || type == Sensor.TYPE_SIGNIFICANT_MOTION|| type == Sensor.TYPE_TILT_DETECTOR || type == Sensor.TYPE_WAKE_GESTURE|| type == Sensor.TYPE_GLANCE_GESTURE || type == Sensor.TYPE_PICK_UP_GESTURE|| type == Sensor.TYPE_LOW_LATENCY_OFFBODY_DETECT|| type == Sensor.TYPE_WRIST_TILT_GESTURE|| type == Sensor.TYPE_DYNAMIC_SENSOR_META || type == Sensor.TYPE_HINGE_ANGLE) {wakeUpSensor = true;}for (Sensor sensor : l) {if (sensor.isWakeUpSensor() == wakeUpSensor) return sensor;}return null;
}alps\frameworks\base\services\core\java\com\android\server\policy\WakeGestureListener.javapublic abstract void onWakeUp();public boolean isSupported() {synchronized (mLock) {return mSensor != null;}
}public void requestWakeUpTrigger() {synchronized (mLock) {if (mSensor != null && !mTriggerRequested) {mTriggerRequested = true;mSensorManager.requestTriggerSensor(mListener, mSensor);}}
}public void cancelWakeUpTrigger() {synchronized (mLock) {if (mSensor != null && mTriggerRequested) {mTriggerRequested = false;mSensorManager.cancelTriggerSensor(mListener, mSensor);}}
}alps\frameworks\base\services\core\java\com\android\server\policy\PhoneWindowManager.javaclass MyWakeGestureListener extends WakeGestureListener {MyWakeGestureListener(Context context, Handler handler) {super(context, handler);}@Overridepublic void onWakeUp() {synchronized (mLock) {if (shouldEnableWakeGestureLp()) {performHapticFeedback(HapticFeedbackConstants.VIRTUAL_KEY, false,"Wake Up");wakeUp(SystemClock.uptimeMillis(), mAllowTheaterModeWakeFromWakeGesture,PowerManager.WAKE_REASON_GESTURE, "android.policy:GESTURE");}}}
}

关键的方法是onWakeUp（），这个方法就是抬手的动作触发的操作，如果我们要在抬手的时候处理一些事情，那么可以在这个方法里面操作。

@Override
public void onWakeUp() {synchronized (mLock) {if (shouldEnableWakeGestureLp()) {performHapticFeedback(HapticFeedbackConstants.VIRTUAL_KEY, false,"Wake Up");wakeUp(SystemClock.uptimeMillis(), mAllowTheaterModeWakeFromWakeGesture,PowerManager.WAKE_REASON_GESTURE, "android.policy:GESTURE");}// Add on 2023/4/10 for  startif ((SystemProperties.getInt("ro.xxx_support", 0) == 1|| SystemProperties.getInt("ro.xxx_support", 0) == 1)&& Settings.Global.getInt(mContext.getContentResolver(), Settings.Global.LIFT_ON, 1) == 1) {Log.d("HZH", "PhoneWindowManager MyWakeGestureListener onWakeUp 890: open vicescreen");Intent intent = new Intent();intent.setComponent(new ComponentName("com.xxx.xxx", "com.xxx.xxx.XService"));intent.putExtra("broadcast_type", 109);mContext.startForegroundService(intent);}// Add  on 2023/4/10 for  end}
}

l流程比较简单，主要是给大家提供一个思路，如果有抬手相关的需求的时候，相信是会有帮助的