Kill activity when it comes to foreground

Question

i m writing an application n stuckup with one problem.I have three activity A,B and C. when i goes from activty A to B and B to C and if i press menu button on device.my application goes into background state. when i reopen application it shows Activity C. I want when i reopen my application it should shows Activity A instead of any other activity from Activity stack. I have gone through some activity lifecycle method and try to override it.i have override onStart() ,onPause() method and finsh activity C as well as Activity B and the problem i m facing is when i go from Activity C to activity D activity C finish all background activity n m not able to go back to acitvity C on finish of Activity D. Can anyone help me how to show specific acitivity on resume of application?? thansks in advance. here is my manifest.xml ```

Accepted Answer

In the manifest, set this on your root activity (that is the first one that gets launched in your application, the one with ACTION_MAIN and CATEGORY_LAUNCHER):

```
android:clearTaskOnLaunch="true"
```

You don't need to do anything else. No overriding of lifecycle methods.

EDIT Add additional information after some empirical experimentation:

You need to make sure that your root activity is always in the task's activity stack to make this work. This means that you can't call `finish()` on the root activity until the user actually wants to quit your application (ie: when he presses the BACK key when in your root activity).

In your example you have a LoginActivity, MenuActivity and DescriptionActivity and the LoginActivity is the root activity. When the LoginActivity launches the MenuActivity it cannot call `finish()` on itself. In this case, when the user presses the BACK key while in the MenuActivity, it will return to the LoginActivity. If this isn't what you want then you need to set a flag in the LoginActivity that you've already launched the MenuActivity and when `onResume()` is called you can check that flag to determine if you are returning from the MenuActivity and in that case you can just immediately call `finish()`.

Kill activity when it comes to foreground

Solution

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