How to set background for all activities?

Question

How to set background for all activities in adnroid application and keep it's aspect ratio?

I am using android:windowBackground in style, but I don't know, how to keep aspect ratio for my background image.

Is there only way to add ImageView with background for all activities manually?

Answer 1

You might be able to set the background in the styles.xml

<style name="AppTheme.FullBackground" parent="AppTheme">
    <item name="android:background">#757575</item>
</style>

(Where AppTheme might be a theme you already defined, and I just used a grey color there, but it can be a drawable)

Then add to your Manifest

<activity 
    android:name=".FooActivity"
    android:theme="@style/AppTheme.FullBackground">
</activity>

Since you have to add activities to the Manifest anyway, this is a good way to check if all the activities have the background. You, of course, could still extend the BaseActivity and only have the BaseActivity class maintain the theme setting.