【Settings】设置何时启动屏保

设置在何时开启Daydream
界面中设置在上下文菜单中点击when to dream

Daydream部分的源码路径：packages\apps\Settings\src\com\android\settings
DreamSettings.java

onCreateOptionsMenu(Menu menu, MenuInflater inflater)中// create "when to dream" overflow menu item        MenuItem whenToDream = createMenuItem(menu,                R.string.screensaver_settings_when_to_dream,                MenuItem.SHOW_AS_ACTION_NEVER,                isEnabled,                new Runnable() {                    @Override                    public void run() {                        showDialog(DIALOG_WHEN_TO_DREAM);                    }});

查看onCreateDialog()方法

    @Override    public Dialog onCreateDialog(int dialogId) {        logd("onCreateDialog(%s)", dialogId);        if (dialogId == DIALOG_WHEN_TO_DREAM)            return createWhenToDreamDialog();        return super.onCreateDialog(dialogId);    }

调用了createWhenToDreamDialog()

设置单选项时由变量initialSelection决定。
将initialSelection的值改为我们所需的位置，注释掉原有代码

Settings的push路径 system/priv-app/Settings,重启成功