sensor

frameworks\base\core\java\android\hardware\Sensor.java

sensor 的对象

frameworks\base\core\java\android\hardware\SensorEvent.java

sensor上发的事件对象，包含sensor信息

frameworks\base\core\java\android\hardware\SensorEventListener.java

监听SensorEvent监听器接口

frameworks\base\core\java\android\hardware\SensorManager.java

用于sensor 注册与取消注册抽象类

frameworks\base\core\java\android\hardware\LegacySensorManager.java

与厂商相关sensor管理类

frameworks\base\core\java\android\hardware\SystemSensorManager.java

实现SensorManager是sensor及事件管理实现

SensorManager-》LegacySensorManager-》SystemSensorManager实现sensor管理

frameworks\base\services\core\java\com\android\server\SensorNotificationService.java

是一个系统服务，实现SensorEventListener，用于监听事件并发送通知

frameworks\base\core\java\com\android\internal\os\SensorPowerCalculator.java

frameworks\base\services\core\java\com\mediatek\sensorhub\SensorHubService.java

解锁码亮屏慢

frameworks\base\packages\SystemUI\src\com\android\systemui\classifier\FalsingManager.java

private void sessionExitpoint(boolean force) { if (mSessionActive && (force || !shouldSessionBeActive())) { mSessionActive = false; mSensorManager.unregisterListener(this); } } private void onSessionStart() { if (FalsingLog.ENABLED) { FalsingLog.i("onSessionStart", "classifierEnabled=" + isClassiferEnabled()); } mBouncerOn = false; mSessionActive = true; if (mHumanInteractionClassifier.isEnabled()) { registerSensors(CLASSIFIER_SENSORS); } if (mDataCollector.isEnabled()) { registerSensors(COLLECTOR_SENSORS); } }

根据是锁屏keyguard 时会注册p-sensor，解锁后会注销注册，由于指纹解锁应该是亮屏的。这个时候判断ps enable，不是polling mode，而且定义了GN_MTK_BSP_PS_DYNAMIC_CALI，ps_no_need_calibarate不等于1，就会动态校准。是android N新加的feature，在SystemUI的FalsingManager中，其中之一是通过具体感应器来监测数据, 来做容错处理，比如说用户不小心挡住传感器而导致的一些错误响应等。这个过程根据ps 是wait-sleep模式还是polling ，可能会导致亮屏慢200ms~300msAccidentTouchWindowManager.javaitel_mistaken_touching_proof 用来控制智能辅助功能

public boolean isOpen() { return observer.value == 1;//equals to itel_mistaken_touching_proof } public void onScreenTurnedOff() { Log.d(TAG, "onScreenTurnedOff observer.value : " + observer.value); if (observer.value == 1 && !isRegisterSensor) { Log.d(TAG, "onScreenTurnedOff sensor register success"); isRegisterSensor = true; mSensorManager.registerListener(this,mProximitySensor, SensorManager.SENSOR_DELAY_NORMAL); } accidentWindowDismiss(); } public void onScreenTurnedOn() { Log.d(TAG, "onScreenTurnedOn isSensorShow : " +isSensorShow+" isProximity: "+isProximity+" mHallState "+mHallState); if (isSensorShow && isProximity && (mHallState == 0)) { accidentWindowShow(); } else if (isRegisterSensor) { isRegisterSensor = false; mSensorManager.unregisterListener(this); } }