How to show the back-arrow in the toolbar?

[daniel-stoneuk]

Make sure your activity declaration looks something like this:

<activity
            android:name=".ExampleMaterialAboutActivity"
            android:parentActivityName=".MainActivity"
            android:theme="@style/AppTheme.MaterialAboutActivity"
            tools:ignore="UnusedAttribute">
            <meta-data
                android:name="android.support.PARENT_ACTIVITY"
                android:value=".MainActivity" />
        </activity>

[Rainer-Lang]

I have different parent activites. I start the "about" out of the NavDrawer.

[daniel-stoneuk]

Do you use fragments with your NavDrawer?

[Rainer-Lang]

I'm using Activities and within Fragments (sometimes).

[daniel-stoneuk]

Oh right. Hmm, if you want to code your own logic for activity handling, you can check out MaterialAboutFragment and see how I've done it in the demo app here.

[Rainer-Lang]

Yes I think this is the only way.