Android White Background when keyboard fades away

Put:

<style name="AppTheme" parent="AppBaseTheme">
     <item name="android:windowBackground">@drawable/gradient</item>
</style>

In styles.xml source

Its happen because window re size itself to make room for the soft input area

use android:windowSoftInputMode="adjustNothing" in AndroidManifest.xml

<activity android:windowSoftInputMode="adjustNothing"
..
...
</activity>

In AndroidManifest.xml file try to set windowSoftInputMode attribute to adjustNothing:

android:windowSoftInputMode="adjustNothing"

It worked for my Ionic project, avoiding the resize of Cordova webview when soft keyboard is on.

That is your windowBackground peeking through. You are probably drawing over the white background of your Theme with that teal background. Modify your theme to include a better background color and remove the background from your layout if possible to improve drawing performance.

<style name="MyAppTheme" parent="Theme.DeviceDefault.NoActionBar">
  ...
  <item name="android:windowBackground">#ff000000</item>
  ...
</style>