Android 系统开机时间优化

概述publicstaticvoidsetDefaultHome(Contextcontext){PackageManagerpackageManager=context.getPackageManager();finalComponentNamecomponent=Constants.HOME_COMPONENTNAME;finalList<ResolveInfo>homeActivities=new

    public static voID setDefaultHome(Context context) {        PackageManager packageManager = context.getPackageManager();        final Componentname component = Constants.HOME_COMPONENTname;        final List<ResolveInfo> homeActivitIEs = new ArrayList<>();        packageManager.getHomeActivitIEs(homeActivitIEs);        final List<Componentname> allComponents = new ArrayList<>();        for (ResolveInfo info : homeActivitIEs) {            final ActivityInfo appInfo = info.activityInfo;            Componentname activityname = new Componentname(appInfo.packagename, appInfo.name);            allComponents.add(activityname);        }        // 利用 PackageManager 设置默认主页        packageManager.replacePreferredActivity(                HOME_FILTER,                IntentFilter.MATCH_category_EMPTY,                allComponents.toArray(new Componentname[0]),                component);        // Launch the new Home app so the change is immediately visible even if        // the Home button is not pressed.        // 跳转到主页        if (true) {            // 不能再次启动 Launcher，影响开机时间，再次启动会多耗时 4s+            return;        }        Intent intent = new Intent(Intent.ACTION_MAIN);        intent.addcategory(Intent.category_HOME);        intent.setFlags(Intent.FLAG_ACTIVITY_NEW_TASK);        context.startActivityAsUser(intent, UserHandle.CURRENT);    }

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