Transparent Activity opening independently

Question

I want to create a activity with transparent background that I can start by clicking on a Notification.

I created the notification and the activity with no problem, but now, I want to open this particular TransparentActivity independently i.e. without showing the other activities on the background.

I tried to put some flags on the intent:

intent.setFlags(Intent.FLAG_ACTIVITY_NEW_TASK | Intent.FLAG_ACTIVITY_SINGLE_TOP | Intent.FLAG_ACTIVITY_CLEAR_WHEN_TASK_RESET);

and on the AndroidManifest file, on my TransparentActivity tag, I put:

<activity
    android:name=".TransparentActivity"
    android:launchMode="singleTask"
    android:theme="@style/Theme.Transparent">
    <intent-filter>
        <action android:name="android.intent.action.MAIN" />
        <category android:name="android.intent.category.LAUNCHER" />
    </intent-filter>
</activity>

It works as expected, but now I have two icons for my app, which is something I don't want.

Is there a way to make it work?

Answer 1

Easiest way to do this is to change the taskAffinity for this Activity in the manifest. Add:

android:taskAffinity=""

to the <activity> declaration for this oneActivity`.

This one Activity will then be launched into a new task, and not into the task that runs the rest of your application.