Set alpha on ImageView without setAlpha

Question

Can I programatically set the alpha of an ImageView without the need for being dependent on API level 11 where setAlpha was introduced?

Answer 1

ImageView has a method setAlpha(int) since API leve 1. So you can use it in any API level.
It is the setAlpha(float) method of View which is introduced in API level 11.

Answer 2

I used code to setAlpha of the image itself, not the view. This is available from API level 1..

public void toggleButton(int i) {
    if (indImageBtnEnabled[i]) {

        int di = getDrawableId(findViewById(myImagebtns[i]));
        Drawable d = this.getResources().getDrawable(di);
        d.setAlpha(25);

        ((ImageView) findViewById(myImagebtns[i])).setImageDrawable(d);

        indImageBtnEnabled[i] = false;
    } else {
        // findViewById(myImagebtns[i]).setAlpha(1f) << NEEDS API11;
        int di = getDrawableId(findViewById(myImagebtns[i]));
        Drawable d = this.getResources().getDrawable(di);
        d.setAlpha(255);

        ((ImageView) findViewById(myImagebtns[i])).setImageDrawable(d);

        indImageBtnEnabled[i] = true;
    }
}