Android keyboard key preview background image

Question

DEVELOPING AN ANDROID KEYBOARD: how can I change the background image of the key preview?

Answer 1

If you are creating your custom keyboard by extending KeyboardView then we can set a custom key preview layout to our custom KeyboardView using 'android:keyPreviewLayout' attr.

E.g.

 <com.example.myApp.MyCustomKeyboardView
        android:id="@+id/keyboard_view"
        android:layout_width="fill_parent"
        android:layout_height="wrap_content"
        android:keyPreviewLayout="@layout/my_custom_layout" />

where my_custom_layout.xml is your custom preview layout something like

<TextView xmlns:android="http://schemas.android.com/apk/res/android"
    android:layout_width="wrap_content"
    android:layout_height="80sp"
    android:textSize="40sp"
    android:textColor="?android:attr/textColorPrimaryInverse"
    android:minWidth="32dip"
    android:gravity="center"
    android:background="@color/black"/>

Hope this helps!