从启动启动器图标现有singleTask活动 [英] Launch existing singleTask Activity from launcher icon

问题描述

情景：

• 活动A（MAIN和LAUNCHER在清单）上的启动器图标时，点击启动。

• Activity A (MAIN and LAUNCHER in manifest) starts up when clicking on launcher icon.

在轮到启动活动B。

活动B然后启动我们的主要应用程序的活动C（MAIN和singleTask在清单）。

Activity B then launches our main app Activity C (MAIN and singleTask in manifest).

行为我需要：

在活动C已经被证明和home键是那么pressed，下一次启动程序图标pressed我想直接跳到活动C（而不是展示活动A（因而乙）再次）。

Once Activity C has been shown and the home key is then pressed, the next time the launcher icon is pressed I would like to skip straight to Activity C (and not show Activity A (and consequently B) again).

我一直在使用FLAG_ACTIVITY_CLEAR_TOP从A试过，但我仍然得到活动A，每当我打了启动屏幕上的图标。

I have tried using FLAG_ACTIVITY_CLEAR_TOP from A, but I still get Activity A whenever I hit icon on launch screen.

从发射我singletask活动的C外观实现？

Is appearance of my singletask Activity C from launcher achievable?

更新：从A FLAG_ACTIVITY_CLEAR_TOP使用，而不是调用完成（），从而创建活动B的启动器图标的preSS出现的情况。然而，也将使用选自B FLAG_ACTIVITY_CLEAR_TOP，而不是调用完成（）不能解决的情况。现在我没有得到一个关于启动器图标preSS，但得到B.是什么给了！

Update: Use of FLAG_ACTIVITY_CLEAR_TOP from A and not calling finish() creates the situation whereby Activity B appears on press of launcher icon. However, also applying use of FLAG_ACTIVITY_CLEAR_TOP from B and not calling finish() does not resolve situation. now I don't get A on launcher icon press, but get B. What gives!

推荐答案

请参阅类似的情景<一个href=\"http://stackoverflow.com/questions/7238532/how-to-launch-activity-only-once-when-app-is-opened-for-first-time\">here.

在你的情况，我会建议使用类似的方法，在这里你将有一个共享preference将坚持重presenting您的应用程序是否具有previously已经启动的值。

In your case, I would recommend using a similar approach, where you would have a SharedPreference that would persist a value representing whether your app had previously been launched.

创建一个简单的活动，将包含你正在试图在这里做的逻辑。在该活动的（pre-A活动）onResume（）方法，检查程序是否pviously跑了$ P $的的preference重新presenting的价值。

Create a simple Activity that will contain the logic for what you are trying to do here. In that activity's ("pre-A" Activity) onResume() method, check the value of the preference representing whether the app has ran previously.

如果它没有previously已经跑了，推出一个意向到活动A，它调用后续的B和C的活动;否则，发起意图活动℃。

If it has not previously been ran, launch an intent to Activity A, which calls the subsequent B and C activities; otherwise, launch an intent to Activity C.

好像pretty简单，只记得在你的清单来定义新的pre-A的活动！

Seems pretty straightforward, just remember to define the new "Pre-A" activity in your manifest!

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