Android(安卓)launcher 源码 app 的启动方式

关键Java代码路径

Launcher3\src\com\android\launcher3\LauncherModel.java

 private void loadAllApps() {                     // Create the ApplicationInfos            for (int i = 0; i < apps.size(); i++) {                ResolveInfo app = apps.get(i);                // This builds the icon bitmaps.                mBgAllAppsList.add(new AppInfo(packageManager, app,                        mIconCache, mLabelCache));            }

可以看到 app快捷方式默认 FLAG_ACTIVITY_NEW_TASKFLAG_ACTIVITY_RESET_TASK_IF_NEEDED 两种flag

 /**     * Must not hold the Context.     */    public AppInfo(PackageManager pm, ResolveInfo info, IconCache iconCache,            HashMap<Object, CharSequence> labelCache) {        final String packageName = info.activityInfo.applicationInfo.packageName;        this.componentName = new ComponentName(packageName, info.activityInfo.name);        this.container = ItemInfo.NO_ID;        this.setActivity(componentName,                Intent.FLAG_ACTIVITY_NEW_TASK | Intent.FLAG_ACTIVITY_RESET_TASK_IF_NEEDED);        try {            PackageInfo pi = pm.getPackageInfo(packageName, 0);            flags = initFlags(pi);            firstInstallTime = initFirstInstallTime(pi);        } catch (NameNotFoundException e) {            Log.d(TAG, "PackageManager.getApplicationInfo failed for " + packageName);        }        iconCache.getTitleAndIcon(this, info, labelCache);    }

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