Searching high and low has yielded no result for my problem. Hence I'm finally posting to plead for some assistance.
I have two app, both written by me. App A launches App B, passing in parameters through Intent.putExtra(). This works perfectly fine when App B is launched the parameters are passed nicely.
However, I can't find a way to return a response to App A. Using startActivityForResult() always gave me immediate onActivityResult() with RESULT_CANCELED. Upon further inspection, the logcat gave me a warning stating "Activity is launching as a new task, so cancelling activity result".
I tried making Activity of App B with different launch mode, action filters (android.intent.action.PICK), but nothing I do changed anything.
Am I trying to do the impossible? From what I understand, what I am attempting to do should be similar to using third-party activity to pick pictures from the device's photo gallery.
EDIT:
Ok, I tried removing the LAUNCHER category from Activity B but it still doesn't work. Here's my activity:
<activity android:name=".${CLASSNAME}" android:label="@string/app_name" android:configChanges="mcc|mnc|locale|keyboardHidden|orientation" android:launchMode="standard">
<intent-filter>
<action android:name="android.intent.action.PICK" />
</intent-filter>
</activity>
Has anybody actually got this to work? I'm beginning to suspect starting an activity that is of another app can never return results since it seems it'll always start a new task no matter what you put in the "intent-filter".