Code example for Drawable

Methods: drawgetBoundsgetIntrinsicHeightgetIntrinsicWidthgetOpacitysetBounds

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            if (icon == null) {
                return null; 
            } 
 
            final int iconWidth = icon.getIntrinsicWidth();
            final int iconHeight = icon.getIntrinsicHeight();
 
            if (icon instanceof PaintDrawable) {
                PaintDrawable painter = (PaintDrawable) icon;
                painter.setIntrinsicWidth(width);
                painter.setIntrinsicHeight(height);
            } 
 
            if (width > 0 && height > 0) {
                if (width < iconWidth || height < iconHeight) {
                    final float ratio = (float) iconWidth / iconHeight;
 
                    if (iconWidth > iconHeight) {
                        height = (int) (width / ratio);
                    } else if (iconHeight > iconWidth) {
                        width = (int) (height * ratio);
                    } 
 
                    final Bitmap.Config c = icon.getOpacity() != PixelFormat.OPAQUE ?
                                Bitmap.Config.ARGB_8888 : Bitmap.Config.RGB_565;
                    final Bitmap thumb = Bitmap.createBitmap(mIconWidth, mIconHeight, c);
                    final Canvas canvas = mCanvas;
                    canvas.setBitmap(thumb);
                    // Copy the old bounds to restore them later 
                    // If we were to do oldBounds = icon.getBounds(), 
                    // the call to setBounds() that follows would 
                    // change the same instance and we would lose the 
                    // old bounds 
                    mOldBounds.set(icon.getBounds());
                    final int x = (mIconWidth - width) / 2;
                    final int y = (mIconHeight - height) / 2;
                    icon.setBounds(x, y, x + width, y + height);
                    icon.draw(canvas);
                    icon.setBounds(mOldBounds);
                    icon = new BitmapDrawable(thumb);
                } else if (iconWidth < width && iconHeight < height) {
                    final Bitmap.Config c = Bitmap.Config.ARGB_8888;
                    final Bitmap thumb = Bitmap.createBitmap(mIconWidth, mIconHeight, c);
                    final Canvas canvas = mCanvas;
                    canvas.setBitmap(thumb);
                    mOldBounds.set(icon.getBounds());
                    final int x = (width - iconWidth) / 2;
                    final int y = (height - iconHeight) / 2;
                    icon.setBounds(x, y, x + iconWidth, y + iconHeight);
                    icon.draw(canvas);
                    icon.setBounds(mOldBounds);
                    icon = new BitmapDrawable(thumb);
                } 
            } 
 
            return icon;