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 shortcut
cancelPendingAccessibilityShortcutAction();
result &= ~ACTION_PASS_TO_USER;
isWakeKey = false; // wake-up will be handled separately
if (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 through
case KeyEvent.KEYCODE_SYSTEM_NAVIGATION_UP:
// fall through
case KeyEvent.KEYCODE_SYSTEM_NAVIGATION_LEFT:
// fall through
case 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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