安卓长按关机按键确认

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

//查看长按关机方法
private void powerLongPress() {
final int behavior = getResolvedLongPressOnPowerBehavior();
switch (behavior) {
case LONG_PRESS_POWER_NOTHING:
break;
case LONG_PRESS_POWER_GLOBAL_ACTIONS:
mPowerKeyHandled = true;
performHapticFeedback(HapticFeedbackConstants.LONG_PRESS, false,
"Power - Long Press - Global Actions");
showGlobalActionsInternal();
break;
case LONG_PRESS_POWER_SHUT_OFF:
case LONG_PRESS_POWER_SHUT_OFF_NO_CONFIRM:
mPowerKeyHandled = true;
performHapticFeedback(HapticFeedbackConstants.LONG_PRESS, false,
"Power - Long Press - Shut Off");
sendCloseSystemWindows(SYSTEM_DIALOG_REASON_GLOBAL_ACTIONS);
mWindowManagerFuncs.shutdown(behavior == LONG_PRESS_POWER_SHUT_OFF);
break;
case LONG_PRESS_POWER_GO_TO_VOICE_ASSIST:
mPowerKeyHandled = true;
performHapticFeedback(HapticFeedbackConstants.LONG_PRESS, false,
"Power - Long Press - Go To Voice Assist");
// Some devices allow the voice assistant intent during setup (and use that intent
// to launch something else, like Settings). So we explicitly allow that via the
// config_allowStartActivityForLongPressOnPowerInSetup resource in config.xml.
launchVoiceAssist(mAllowStartActivityForLongPressOnPowerDuringSetup);
break;
case LONG_PRESS_POWER_ASSISTANT:
mPowerKeyHandled = true;
performHapticFeedback(HapticFeedbackConstants.LONG_PRESS, false,
"Power - Long Press - Go To Assistant");
final int powerKeyDeviceId = Integer.MIN_VALUE;
launchAssistAction(null, powerKeyDeviceId);
break;
}

private int getResolvedLongPressOnPowerBehavior() {
    //检查是否为工厂测试模式 
    if (FactoryTest.isLongPressOnPowerOffEnabled()) {
        return LONG_PRESS_POWER_SHUT_OFF_NO_CONFIRM;
    }
    return mLongPressOnPowerBehavior;
    //return LONG_PRESS_POWER_SHUT_OFF_NO_CONFIRM;
}

//查看mLongPressOnPowerBehavior，config_longPressOnPowerBehavior默认值为1
mLongPressOnPowerBehavior = Settings.Global.getInt(resolver,
Settings.Global.POWER_BUTTON_LONG_PRESS,
mContext.getResources().getInteger(
com.android.internal.R.integer.config_longPressOnPowerBehavior));

frameworks/base/core/res/res/values/config.xml

<!-- Control the behavior when the user long presses the power button.
        0 - Nothing
        1 - Global actions menu
        2 - Power off (with confirmation)
        3 - Power off (without confirmation)
        4 - Go to voice assist
        5 - Go to assistant (Settings.Secure.ASSISTANT)
-->
<integer name="config_longPressOnPowerBehavior">1</integer>

frameworks/base/core/res/res/values/config.xml