Android 短按两次Power键打开相机

 

RK3368 Android6.0

今天 12.31 有点搞笑 有测试人员反馈 短按power键 会跳转到camera2  

先看了一下日志 确实跳转到了camera2  把东西捋了一下 问了一下 硬件(一度怀疑power的键值是不是改变了) 硬件说要拿烙铁帮我看一下日志 哈哈哈

一.日志先上

12-31 15:06:45.716  GestureLauncherService(  586): Power button double tap gesture detected, launching camera. Interval=240ms  噫

12-31 15:06:45.959  ActivityManager(  586): START u0 {act=android.media.action.STILL_IMAGE_CAMERA

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12-31 15:06:45.476 W/TelecomManager(  586): Telecom Service not found. 12-31 15:06:45.624 D/XHApiManager(  586): enter XHApiManager 12-31 15:06:45.625 I/PowerManagerService(  586): Going to sleep due to power button (uid 1000)... 12-31 15:06:45.627 I/PowerManagerService(  586): Sleeping (uid 1000)... 12-31 15:06:45.715 D/XHApiManager(  586): enter XHApiManager 12-31 15:06:45.716 W/TelecomManager(  586): Telecom Service not found. 12-31 15:06:45.716 I/GestureLauncherService(  586): Power button double tap gesture detected, launching camera. Interval=240ms 12-31 15:06:45.717 I/PowerManagerService(  586): Waking up from sleep (uid 1000)... 12-31 15:06:45.733 D/SensorsHal(  586): Couldn't open /dev/mma8452_daemon (No such file or directory) 12-31 15:06:45.733 E/SensorService(  586): Error activating sensor 0 (Operation not permitted) 12-31 15:06:45.734 V/KeyguardServiceDelegate(  586): onStartedWakingUp() 12-31 15:06:45.749 D/WifiConfigStore(  586): Retrieve network priorities before PNO. Max priority: 0 12-31 15:06:45.751 D/XHService(  586): receiver intent :android.intent.action.SCREEN_OFF 12-31 15:06:45.751 E/WifiStateMachine(  586):  Fail to set up pno, want true now false 12-31 15:06:45.776 E/native  (  586): do suspend true 12-31 15:06:45.779 I/ActivityManager(  586): START u0 {act=android.media.action.STILL_IMAGE_CAMERA flg=0x14000000 cmp=com.android.camera2/com.android.camera.CameraActivity} from uid 10011 on display 0

1.1.frameworks\base\services\core\java\com\android\server\policy\PhoneWindowManager.java

power键值

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case KeyEvent.KEYCODE_POWER: {     result &= ~ACTION_PASS_TO_USER;     isWakeKey = false; // wake-up will be handled separately     if (down) {         interceptPowerKeyDown(event, interactive);                                                              } else {         interceptPowerKeyUp(event, interactive, canceled);     }     break;

 power键按下

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private void interceptPowerKeyDown(KeyEvent event, boolean interactive) {     // Hold a wake lock until the power key is released.     if (!mPowerKeyWakeLock.isHeld()) {         mPowerKeyWakeLock.acquire();     }       // Cancel multi-press detection timeout.     if (mPowerKeyPressCounter != 0) {         mHandler.removeMessages(MSG_POWER_DELAYED_PRESS);     }       // Detect user pressing the power button in panic when an application has     // taken over the whole screen.     boolean panic = mImmersiveModeConfirmation.onPowerKeyDown(interactive,             SystemClock.elapsedRealtime(), isImmersiveMode(mLastSystemUiFlags));     if (panic) {         mHandler.post(mHiddenNavPanic);     }       // Latch power key state to detect screenshot chord.     if (interactive && !mScreenshotChordPowerKeyTriggered             && (event.getFlags() & KeyEvent.FLAG_FALLBACK) == 0) {         mScreenshotChordPowerKeyTriggered = true;         mScreenshotChordPowerKeyTime = event.getDownTime();         interceptScreenshotChord();     }       // Stop ringing or end call if configured to do so when power is pressed.     TelecomManager telecomManager = getTelecommService();     boolean hungUp = false;     if (telecomManager != null) {         if (telecomManager.isRinging()) {             // Pressing Power while there's a ringing incoming             // call should silence the ringer.             telecomManager.silenceRinger();         } else if ((mIncallPowerBehavior                 & Settings.Secure.INCALL_POWER_BUTTON_BEHAVIOR_HANGUP) != 0                 && telecomManager.isInCall() && interactive) {             // Otherwise, if "Power button ends call" is enabled,             // the Power button will hang up any current active call.             hungUp = telecomManager.endCall();         }     }       GestureLauncherService gestureService = LocalServices.getService(             GestureLauncherService.class);     boolean gesturedServiceIntercepted = false;     if (gestureService != null) {         gesturedServiceIntercepted = gestureService.interceptPowerKeyDown(event, interactive);     }       // If the power key has still not yet been handled, then detect short     // press, long press, or multi press and decide what to do.     mPowerKeyHandled = hungUp || mScreenshotChordVolumeDownKeyTriggered             || mScreenshotChordVolumeUpKeyTriggered || gesturedServiceIntercepted;     if (!mPowerKeyHandled) {         if (interactive) {             // When interactive, we're already awake.             // Wait for a long press or for the button to be released to decide what to do.             if (hasLongPressOnPowerBehavior()) {                 Message msg = mHandler.obtainMessage(MSG_POWER_LONG_PRESS);                 msg.setAsynchronous(true);                 mHandler.sendMessageDelayed(msg,                         ViewConfiguration.get(mContext).getDeviceGlobalActionKeyTimeout());             }         } else {             wakeUpFromPowerKey(event.getDownTime());               if (mSupportLongPressPowerWhenNonInteractive && hasLongPressOnPowerBehavior()) {                 Message msg = mHandler.obtainMessage(MSG_POWER_LONG_PRESS);                 msg.setAsynchronous(true);                 mHandler.sendMessageDelayed(msg,                         ViewConfiguration.get(mContext).getDeviceGlobalActionKeyTimeout());                 mBeganFromNonInteractive = true;             } else {                 final int maxCount = getMaxMultiPressPowerCount();                   if (maxCount <= 1) {                     mPowerKeyHandled = true;                 } else {                     mBeganFromNonInteractive = true;                 }             }         }     } }

1.2.frameworks\base\services\core\java\com\android\server\GestureLauncherService.java

双击拉起camera2        mCameraDoubleTapPowerEnabled && 判断距离上一次按键时间 

mCameraDoubleTapPowerEnabled ->isCameraDoubleTapPowerSettingEnabled->Settings.Secure.CAMERA_DOUBLE_TAP_POWER_GESTURE_DISABLED

updateCameraDoubleTapPowerEnabled

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private void updateCameraDoubleTapPowerEnabled() {     boolean enabled = isCameraDoubleTapPowerSettingEnabled(mContext, mUserId);     synchronized (this) {         mCameraDoubleTapPowerEnabled = enabled;

isCameraDoubleTapPowerSettingEnabled　　　

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public static boolean isCameraDoubleTapPowerSettingEnabled(Context context, int userId) {     return isCameraDoubleTapPowerEnabled(context.getResources())             && (Settings.Secure.getIntForUser(context.getContentResolver(),                     Settings.Secure.CAMERA_DOUBLE_TAP_POWER_GESTURE_DISABLED, 0, userId) == 0); }

interceptPowerKeyDown　　

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public boolean interceptPowerKeyDown(KeyEvent event, boolean interactive) {     boolean launched = false;     boolean intercept = false;     long doubleTapInterval;     synchronized (this) {         doubleTapInterval = event.getEventTime() - mLastPowerDown;         if (mCameraDoubleTapPowerEnabled                 && doubleTapInterval < CAMERA_POWER_DOUBLE_TAP_MAX_TIME_MS                 && doubleTapInterval > CAMERA_POWER_DOUBLE_TAP_MIN_TIME_MS) {             launched = true;             intercept = interactive;         }         mLastPowerDown = event.getEventTime();     }     if (launched) {         Slog.i(TAG, "Power button double tap gesture detected, launching camera. Interval="                 + doubleTapInterval + "ms");         launched = handleCameraLaunchGesture(false /* useWakelock */,                 StatusBarManager.CAMERA_LAUNCH_SOURCE_POWER_DOUBLE_TAP);         if (launched) {             MetricsLogger.action(mContext, MetricsLogger.ACTION_DOUBLE_TAP_POWER_CAMERA_GESTURE,                     (int) doubleTapInterval);         }     }     MetricsLogger.histogram(mContext, "power_double_tap_interval", (int) doubleTapInterval);     return intercept && launched; }

handleCameraGesture 拉起相机

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/**  * @return true if camera was launched, false otherwise.  */ private boolean handleCameraLaunchGesture(boolean useWakelock, int source) {     boolean userSetupComplete = Settings.Secure.getInt(mContext.getContentResolver(),             Settings.Secure.USER_SETUP_COMPLETE, 0) != 0;     if (!userSetupComplete) {         if (DBG) Slog.d(TAG, String.format(                 "userSetupComplete = %s, ignoring camera launch gesture.",                 userSetupComplete));         return false;     }     if (DBG) Slog.d(TAG, String.format(             "userSetupComplete = %s, performing camera launch gesture.",             userSetupComplete));       if (useWakelock) {         // Make sure we don't sleep too early         mWakeLock.acquire(500L);     }     StatusBarManagerInternal service = LocalServices.getService(             StatusBarManagerInternal.class);     service.onCameraLaunchGestureDetected(source);     return true; }