图像背景想要删除并设置为透明图像

     [It is a sticker app I want to remove image background white color, I need a transparent image][1]
      XML: Sticker view used for sticker adding in image view this sticker file going to save into phone gallery 
            <com.xiaopo.flying.sticker.StickerView
                android:id="@+id/sticker_view"
                android:layout_width="wrap_content"
                android:layout_height="wrap_content"
                android:layout_gravity="center"
                app:showBorder="false"
                app:showIcons="false">
            <ImageView
                android:layout_width="wrap_content"
                android:layout_height="wrap_content"
                android:id="@+id/cropped_image_view"
             />
 </com.xiaopo.flying.sticker.StickerView>
     [It is a sticker app I want to remove imag