Yellow box appears around EditText once it has been Auto-Filled
You can customize that autofill's background.Create new styles file res/values-v26/styles.xml,add copy of your application's theme to that file with one additional line
<item name="android:autofilledHighlight">@android:color/transparent</item>in this case it will be transparent, that is what I wanted to achieve, but you can use any color you like.https://developer.android.com/guide/topics/text/autofill