Android5.0 长按电源键关机没弹确定对话框直接关机

Android5.0 长按电源键关机没有弹确定对话框直接关机，但用户点击了关机选项之后，应该弹一个确定对话框给用户提示是否真的进入关机模式。

首先在frameworks层将对话框的标志位打开。

frameworks\base\policy\src\com\android\internal\policy\impl\GlobalActions.java

       @Override        public void onPress() {            final boolean quickbootEnabled = Settings.System.getInt(                    mContext.getContentResolver(), "enable_quickboot", 0) == 1;            // go to quickboot mode if enabled            if (quickbootEnabled) {                startQuickBoot();                return;            }            // shutdown by making sure radio and power are handled accordingly.            mWindowManagerFuncs.shutdown(true /* confirm */);//20150423 show the power-off dialog        }

frameworks\base\services\core\java\com\android\server\power\ShutdownThread.java

static void shutdownInner(final Context context, boolean confirm) {        // ensure that only one thread is trying to power down.        // any additional calls are just returned        synchronized (sIsStartedGuard) {            if (sIsStarted) {                Log.d(TAG, "Request to shutdown already running, returning.");                return;            }        }        boolean showRebootOption = false;        String[] defaultActions = context.getResources().getStringArray(                com.android.internal.R.array.config_globalActionsList);        for (int i = 0; i < defaultActions.length; i++) {            if (defaultActions[i].equals("reboot") && mReboot) {// if (defaultActions[i].equals("reboot")) {20150421 for power_off dialog                showRebootOption = true;                break;            }        }        final int longPressBehavior = context.getResources().getInteger(                        com.android.internal.R.integer.config_longPressOnPowerBehavior);        int resourceId = mRebootSafeMode                ? com.android.internal.R.string.reboot_safemode_confirm                : (longPressBehavior == 2                        ? com.android.internal.R.string.shutdown_confirm_question                        : com.android.internal.R.string.shutdown_confirm);        if (showRebootOption && !mRebootSafeMode) {            resourceId = com.android.internal.R.string.reboot_confirm;        }        Log.d(TAG, "Notifying thread to start shutdown longPressBehavior=" + longPressBehavior);        if (confirm) {            final CloseDialogReceiver closer = new CloseDialogReceiver(context);            if (sConfirmDialog != null) {                sConfirmDialog.dismiss();            }            sConfirmDialog = new AlertDialog.Builder(context)                    .setTitle(mRebootSafeMode                            ? com.android.internal.R.string.reboot_safemode_title                            : showRebootOption                                    ? com.android.internal.R.string.reboot_title                                    : com.android.internal.R.string.power_off)                    .setMessage(resourceId)                    .setPositiveButton(com.android.internal.R.string.yes,                            new DialogInterface.OnClickListener() {                        public void onClick(DialogInterface dialog, int which) {                            beginShutdownSequence(context);                        }                    })                    .setNegativeButton(com.android.internal.R.string.no, null)                    .create();            closer.dialog = sConfirmDialog;            sConfirmDialog.setOnDismissListener(closer);            sConfirmDialog.getWindow().setType(WindowManager.LayoutParams.TYPE_KEYGUARD_DIALOG);            sConfirmDialog.show();        } else {            beginShutdownSequence(context);        }    }