[Solved] How to change an Image in a button on clicking the button?

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A Xamarin/C# way:

var button = FindViewById<Button>(Resource.Id.myButton);
button.Click += delegate { 
    button.Text = "Some New Text";

    // If your image is a Drawable
    button.SetBackgroundResource(Resource.Drawable.button_background);

    // From an asset
    button.Background = Drawable.CreateFromStream(Assets.Open("button_asset.jpg"), null);

    // From an arbitrary path
    button.Background = Drawable.CreateFromPath("/sdcard/Download/downloaded_file.jpg");
};

Update:

If you are using drawableLeft, drawableRight, etc… in your layout, you can change these via SetCompoundDrawablesWithIntrinsicBounds (int left, int top, int right, int bottom):

button.SetCompoundDrawablesWithIntrinsicBounds(0, 0, Resource.Drawable.button_background, 0);

If you are setting multiple drawables, you can preserve and change some of them via:

var drawables = button.GetCompoundDrawables();
button.SetCompoundDrawablesWithIntrinsicBounds(drawables[0], drawables[1], Resources.GetDrawable(Resource.Drawable.button_background, this.Theme), drawables[3]);

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solved How to change an Image in a button on clicking the button?