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copied!<p>I like your original idea of creating a "returnFromNotify" activity better than your proposed workaround, as it <em>is</em> possible to detect if the ResumeActivity is at the bottom of the stack (and therefore the only activity in the stack).</p> <p>Here's how you can do it:</p> <p>Add your ResumeActivity to the manifest and specify the <a href="http://developer.android.com/guide/topics/manifest/activity-element.html#nohist">noHistory</a> attribute:</p> <pre><code><activity android:name=".ResumeActivity" android:noHistory="true" /> </code></pre> <p>Specifying noHistory will make sure this Activity won't stay in the stack as soon as it finishes. This way you know that only a currently running instance of the ResumeActivity will show up in the stack.</p> <p>In order to check the application stack, you'll also have to ask for the GET_TASKS permission:</p> <pre><code><uses-permission android:name="android.permission.GET_TASKS" /> </code></pre> <p>Now you can use <a href="http://developer.android.com/reference/android/app/ActivityManager.html#getRunningTasks%28int%29">ActivityManager::getRunningTasks()</a> to determine if ResumeActivity is the only activity in the stack:</p> <pre><code>public class ResumeActivity extends Activity { @Override public void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); if(isOnlyActivityInStack()) { //check the application stack //This activity is the only activity in the application stack, so we need to launch the main activity Intent main = new Intent(this, MainActivity.class); main.setFlags(Intent.FLAG_ACTIVITY_CLEAR_TOP); startActivity(main); } else { //Return the user to the last activity they had open this.finish(); } } /** * Checks the currently running tasks. If this activity is the base activity, we know it's the only activity in the stack * * @return boolean This activity is the only activity in the stack? **/ private boolean isOnlyActivityInStack() { ActivityManager manager = (ActivityManager) getSystemService(Context.ACTIVITY_SERVICE); boolean onlyActivityInStack = false; for(RunningTaskInfo tasks : manager.getRunningTasks(Integer.MAX_VALUE)) { if(tasks.baseActivity.getPackageName().equals(this.getPackageName())) { //find this package's application stack if(tasks.baseActivity.getClassName().equals(this.getClass().getName())) { //If the ResumeActivity is the base activity, we know that it is the only activity in the stack onlyActivityInStack = true; break; } } } return onlyActivityInStack; } } </code></pre> <p>I know you asked this question over 2 years ago, but I'm providing this answer in case anyone else runs in to this particular situation (as I did). I think you were on the right track with the solution you were originally working towards.</p>

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