systemui关机dialog相关

1、systemui下拉关机按钮
通过Android 布局分析工具发现

按钮布局
base/packages/SystemUI/res-keyguard/layout/footer_actions.xml
按钮初始化和点击事件
frameworks/base/packages/SystemUI/src/com/android/systemui/qs/FooterActionsController.kt

private val powerMenuLite: View = view.findViewById(R.id.pm_lite)
...
powerMenuLite.setOnClickListener(onClickListener)
...
    private val onClickListener = View.OnClickListener { v ->
        // Don't do anything if the tap looks suspicious.
        if (!visible || falsingManager.isFalseTap(FalsingManager.LOW_PENALTY)) {
            return@OnClickListener
        }
        if (v === settingsButtonContainer) {
            if (!deviceProvisionedController.isCurrentUserSetup) {
                // If user isn't setup just unlock the device and dump them back at SUW.
                activityStarter.postQSRunnableDismissingKeyguard {}
                return@OnClickListener
            }
            metricsLogger.action(MetricsProto.MetricsEvent.ACTION_QS_EXPANDED_SETTINGS_LAUNCH)
            startSettingsActivity()
        } else if (v === powerMenuLite) {
            uiEventLogger.log(GlobalActionsDialogLite.GlobalActionsEvent.GA_OPEN_QS)
            globalActionsDialog?.showOrHideDialog(false, true, v)
        }
    }

GlobalActionsDialogLite
globalActionsDialog?.showOrHideDialog(false, true, v)
到这里，就定位到按钮点击跳出关机dialog的地方
2、GlobalActionsDialogLite
frameworks/base/packages/SystemUI/src/com/android/systemui/globalactions/GlobalActionsDialogLite.java
showOrHideDialog

    public void showOrHideDialog(boolean keyguardShowing, boolean isDeviceProvisioned,
            @Nullable View view) {
        mKeyguardShowing = keyguardShowing;
        mDeviceProvisioned = isDeviceProvisioned;
        if (mDialog != null && mDialog.isShowing()) {
            // In order to force global actions to hide on the same affordance press, we must
            // register a call to onGlobalActionsShown() first to prevent the default actions
            // menu from showing. This will be followed by a subsequent call to
            // onGlobalActionsHidden() on dismiss()
            mWindowManagerFuncs.onGlobalActionsShown();
            mDialog.dismiss();
            mDialog = null;
        } else {
            handleShow(view);
        }
    }

3、点击事件
从代码看，这是一个adapter适配器

        public void onClickItem(int position) {
            Action item = mAdapter.getItem(position);
            if (!(item instanceof SilentModeTriStateAction)) {
                if (mDialog != null) {
                    // don't dismiss the dialog if we're opening the power options menu
                    if (!(item instanceof PowerOptionsAction)) {
                        // Usually clicking an item shuts down the phone, locks, or starts an
                        // activity. We don't want to animate back into the power button when that
                        // happens, so we disable the dialog animation before dismissing.
                        mDialogLaunchAnimator.disableAllCurrentDialogsExitAnimations();
                        mDialog.dismiss();
                    }
                } else {
                    Log.w(TAG, "Action clicked while mDialog is null.");
                }
                item.onPress();
            }
        }

4、item.onPress()
GlobalActionsDialogLite内部有很多内部类，继承实现了onPress接口，对应真正的点击事件。

关机按钮的实现类如下

    @VisibleForTesting
    final class ShutDownAction extends SinglePressAction implements LongPressAction {
        ShutDownAction() {
            super(R.drawable.ic_lock_power_off,
                    R.string.global_action_power_off);
        }
        ...
        ...
        @Override
        public void onPress() {
            mUiEventLogger.log(GlobalActionsEvent.GA_SHUTDOWN_PRESS);
            // shutdown by making sure radio and power are handled accordingly.
            mWindowManagerFuncs.shutdown();
        }
    }

5、GlobalActionsComponent
frameworks/base/packages/SystemUI/src/com/android/systemui/globalactions/GlobalActionsComponent.java

    @Override
    public void shutdown() {
        /*Skip Monkey Test*/
        if (ActivityManager.isUserAMonkey()) {
            Log.d(TAG, "Cannot shut down during monkey test");
            return;
        }
        /* @} */
        try {
            mBarService.shutdown();
        } catch (RemoteException e) {
        }
    }

mBarService.shutdown();最终走到frameworks/base/services/core/java/com/android/server/statusbar/StatusBarManagerService.java