Scale drawableLeft in button with text

Question

I have a button with text and a drawable on the left. Is there any way I can make that drawable scale to it's appropriate size (fill button's height) while keeping its aspect ratio?

Relevant excerpt from my layout:

        <Button 
            android:text="@string/add_fav"
            android:id="@+id/event_fav_button"
            android:layout_width="match_parent"
            android:layout_height="40dp"
            android:drawableLeft="@drawable/star_yellow"/>  

Answer 1

You can resize an image on basis of the dimension of a Button, use getHeight() and getWidth() methods to get the size of the button and use following function to resize image for Button:

Resizing a Bitmap:

public Bitmap getResizedBitmap(Bitmap bm, int newHeight, int newWidth) {

int width = bm.getWidth();

int height = bm.getHeight();

float scaleWidth = ((float) newWidth) / width;

float scaleHeight = ((float) newHeight) / height;

// create a matrix for the manipulation

Matrix matrix = new Matrix();

// resize the bit map

matrix.postScale(scaleWidth, scaleHeight);

// recreate the new Bitmap

Bitmap resizedBitmap = Bitmap.createBitmap(bm, 0, 0, width, height, matrix, false);

return resizedBitmap;

}

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Now use this resized image for your button. Reference