<activity android:name=".SendMessageActivity">

    <!-- This activity can respond to intents with an action SEND and a content type text/plain -->
    <intent-filter>
        <action android:name="android.intent.action.SEND"/>
        <category android:name="android.intent.category.DEFAULT"/>
        <data android:mimeType="text/plain"/>
    </intent-filter>

    <!-- Needed if you import the sharetarget androidx library. It allows for this activity to be taken into account as a chooser target provider -->
    <meta-data android:name="android.service.chooser.chooser_target_service"
               android:value="androidx.sharetarget.ChooserTargetServiceCompat"/>
</activity>