How to create Drawable from resource – Dev

The best answers to the question “How to create Drawable from resource” in the category Dev.

QUESTION:

I have an image res/drawable/test.png (R.drawable.test).
I want to pass this image to a function which accepts Drawable, e.g. mButton.setCompoundDrawables().

So how can I convert an image resource to a Drawable?

ANSWER:

This code is deprecated:

Drawable drawable = getResources().getDrawable( R.drawable.icon );

Use this instead:

Drawable drawable = ContextCompat.getDrawable(getApplicationContext(),R.drawable.icon);

ANSWER:

Your Activity should have the method getResources. Do:

Drawable myIcon = getResources().getDrawable( R.drawable.icon );


As of API version 21 this method is deprecated and can be replaced with:

Drawable myIcon = AppCompatResources.getDrawable(context, R.drawable.icon);

If you need to specify a custom theme, the following will apply it, but only if API is version 21 or greater:

Drawable myIcon =  ResourcesCompat.getDrawable(getResources(), R.drawable.icon, theme);

ANSWER:

I would just like to add that if you are getting “deprecated” message when using getDrawable(…) you should use the following method from the support library instead.

ContextCompat.getDrawable(getContext(),R.drawable.[name])

You do not have to use getResources() when using this method.

This is equivalent to doing something like

Drawable mDrawable;
if(android.os.Build.VERSION.SDK_INT >= android.os.Build.VERSION_CODES.LOLLIPOP){
    mDrawable = ContextCompat.getDrawable(getContext(),R.drawable.[name]);
} else {
    mDrawable = getResources().getDrawable(R.id.[name]);
}

This works on both pre and post Lollipop versions.

ANSWER:

The getDrawable (int id) method is deprecated as of API 22.

Instead you should use the getDrawable (int id, Resources.Theme theme) for API 21+

Code would look something like this.

Drawable myDrawable;
if(android.os.Build.VERSION.SDK_INT >= android.os.Build.VERSION_CODES.LOLLIPOP){
    myDrawable = context.getResources().getDrawable(id, context.getTheme());
} else {
    myDrawable = context.getResources().getDrawable(id);
}