Color-Drawable Resources
Description
In Android, an image is one type of a drawable resource.
Android supports another drawable resource called a color-drawable resource, which is essentially a colored rectangle.
Example
To define a color rectangle, you define an XML element by the node name
of drawable in any XML file in the /res/values subdirectory.
The following code shows a couple of color-drawable resource examples.
<resources>
<drawable name="red_rectangle">#f00</drawable>
<drawable name="blue_rectangle">#0000ff</drawable>
<drawable name="green_rectangle">#f0f0</drawable>
</resources>
The following code shows how you can use a color-drawable resource in Java.
/*from w ww. j ava2 s . c o m*/
// Get a drawable
ColorDrawable redDrawable = (ColorDrawable)
activity.getResources().getDrawable(R.drawable.red_rectangle);
//Set it as a background to a text view
textView.setBackgroundDrawable(redDrawable);
Reference in resource
The following code shows how you can use a color-drawable resource in layout resource.
<resources>
<drawable name="red_rectangle">#f00</drawable>
<drawable name="blue_rectangle">#0000ff</drawable>
<drawable name="green_rectangle">#f0f0</drawable>
</resources>
The following resource file references the defined color drawable defined above.
<TextView android:layout_width="fill_parent"
android:layout_height="wrap_content"
android:textAlign="center"
android:background="@drawable/red_rectangle"/>