Android - Set a border around an ImageView

Question

I have a cell with a fixed width and height, let it be 100x100px. Inside that cell I want to display an ImageView with a border around.
My first idea was to put

Answer 1

This is what worked for me:

    <ImageView
        android:id="@+id/dialpad_phone_country_flag"
        android:layout_width="22dp"
        android:layout_height="15dp"
        android:scaleType="fitXY"
        android:background="@color/gen_black"
        android:padding="1px"/>

Answer 2

Just add the property adjustViewBounds to the ImageView.

<ImageView
        android:id="@+id/imageView"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:background="@drawable/image_border"
        android:padding="1dp"
        android:adjustViewBounds="true"
        android:src="@drawable/test_image" />

Kindly note that android:adjustViewBounds="true" works only with android:layout_width and android:layout_height set to "wrap_content".

Answer 3

If you put the padding=1 and the background color in the LinearLayout, you'll have a 1px yellow border.