Android 开关机POWER键长按短按代码分析

代码定位

路径：frameworks/base/services/core/java/com/android/server/policy/PhoneWindowManager.java

public int interceptKeyBeforeQueueing(KeyEvent event, int policyFlags) {.....................case KeyEvent.KEYCODE_POWER: {EventLogTags.writeInterceptPower(KeyEvent.actionToString(event.getAction()),mPowerKeyHandled ? 1 : 0, mPowerKeyPressCounter);// Any activity on the power button stops the accessibility shortcutcancelPendingAccessibilityShortcutAction();result &= ~ACTION_PASS_TO_USER;isWakeKey = false; // wake-up will be handled separatelyif (down) {interceptPowerKeyDown(event, interactive);//按下动作  interactive->是否亮屏} else {interceptPowerKeyUp(event, interactive, canceled);//释放动作}break;}case KeyEvent.KEYCODE_SYSTEM_NAVIGATION_DOWN:// fall throughcase KeyEvent.KEYCODE_SYSTEM_NAVIGATION_UP:// fall throughcase KeyEvent.KEYCODE_SYSTEM_NAVIGATION_LEFT:// fall throughcase KeyEvent.KEYCODE_SYSTEM_NAVIGATION_RIGHT: {if(!isBox){result &= ~ACTION_PASS_TO_USER;interceptSystemNavigationKey(event);}break;}.....................}

根据上述代码追踪到这个interceptPowerKeyUp()函数接口

private void interceptPowerKeyUp(KeyEvent event, boolean interactive, boolean canceled) {final boolean handled = canceled || mPowerKeyHandled;mScreenshotChordPowerKeyTriggered = false;cancelPendingScreenshotChordAction();cancelPendingPowerKeyAction();if (!handled) {if ((event.getFlags() & KeyEvent.FLAG_LONG_PRESS) == 0) {// Abort possibly stuck animations only when power key up without long press case.mHandler.post(mWindowManagerFuncs::triggerAnimationFailsafe);}// Figure out how to handle the key now that it has been released.mPowerKeyPressCounter += 1;final int maxCount = getMaxMultiPressPowerCount();final long eventTime = event.getDownTime();if (mPowerKeyPressCounter < maxCount) {// This could be a multi-press.  Wait a little bit longer to confirm.// Continue holding the wake lock.Message msg = mHandler.obtainMessage(MSG_POWER_DELAYED_PRESS,interactive ? 1 : 0, mPowerKeyPressCounter, eventTime);msg.setAsynchronous(true);mHandler.sendMessageDelayed(msg, ViewConfiguration.getMultiPressTimeout());return;}// No other actions.  Handle it immediately.powerPress(eventTime, interactive, mPowerKeyPressCounter);}// Done.  Reset our state.finishPowerKeyPress();}

然后注意到上述一个函数接口 powerPress(eventTime, interactive, mPowerKeyPressCounter);

 private void powerPress(long eventTime, boolean interactive, int count) {if (mDefaultDisplayPolicy.isScreenOnEarly() && !mDefaultDisplayPolicy.isScreenOnFully()) {Slog.i(TAG, "Suppressed redundant power key press while "+ "already in the process of turning the screen on.");return;}Slog.d(TAG, "powerPress: eventTime=" + eventTime + " interactive=" + interactive+ " count=" + count + " beganFromNonInteractive=" + mBeganFromNonInteractive +" mShortPressOnPowerBehavior=" + mShortPressOnPowerBehavior);if (count == 2) {powerMultiPressAction(eventTime, interactive, mDoublePressOnPowerBehavior);} else if (count == 3) {powerMultiPressAction(eventTime, interactive, mTriplePressOnPowerBehavior);} else if (interactive && !mBeganFromNonInteractive) {switch (mShortPressOnPowerBehavior) {case SHORT_PRESS_POWER_NOTHING:break;case SHORT_PRESS_POWER_GO_TO_SLEEP:String product = SystemProperties.get("ro.target.product","");if (!TextUtils.isEmpty(product) && (product.equals("box") || product.equals("atv"))) {int powerKey = SystemProperties.getInt("persist.sys.power_key",0);Slog.i("ROCKCHIP", "powerKey = " + powerKey);if (powerKey == 1) {shutDown();} else if (powerKey == 2) {reboot();} else {goToSleepFromPowerButton(eventTime, 0);}} else {goToSleepFromPowerButton(eventTime, 0);}break;case SHORT_PRESS_POWER_REALLY_GO_TO_SLEEP:goToSleepFromPowerButton(eventTime, PowerManager.GO_TO_SLEEP_FLAG_NO_DOZE);break;case SHORT_PRESS_POWER_REALLY_GO_TO_SLEEP_AND_GO_HOME:if (goToSleepFromPowerButton(eventTime,PowerManager.GO_TO_SLEEP_FLAG_NO_DOZE)) {launchHomeFromHotKey(DEFAULT_DISPLAY);}break;case SHORT_PRESS_POWER_GO_HOME:shortPressPowerGoHome();break;case SHORT_PRESS_POWER_CLOSE_IME_OR_GO_HOME: {if (mDismissImeOnBackKeyPressed) {if (mInputMethodManagerInternal == null) {mInputMethodManagerInternal =LocalServices.getService(InputMethodManagerInternal.class);}if (mInputMethodManagerInternal != null) {mInputMethodManagerInternal.hideCurrentInputMethod(SoftInputShowHideReason.HIDE_POWER_BUTTON_GO_HOME);}} else {shortPressPowerGoHome();}break;}}}}

如果想取消短按熄屏如何做呢？接下来是我的做法如下

case SHORT_PRESS_POWER_GO_TO_SLEEP:String product = SystemProperties.get("ro.target.product","");if (!TextUtils.isEmpty(product) && (product.equals("box") || product.equals("atv"))) {int powerKey = SystemProperties.getInt("persist.sys.power_key",0);Slog.i("ROCKCHIP", "powerKey = " + powerKey);if (powerKey == 1) {shutDown();} else if (powerKey == 2) {reboot();} else {//goToSleepFromPowerButton(eventTime, 0);}} else {//goToSleepFromPowerButton(eventTime, 0);}break;

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代码定位

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