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BitmapUtil.md

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Converting vector drawable to Bitmap

The library contains the util class to allow you to convert almost any drawable to a Bitmap. For example:

DisplayMetrics metrics = context.getResources().getDisplayMetrics();
Bitmap bitmap = BitmapUtil.toBitmap(sourceDrawable, metrics, 60f, 120f);

That snippet will convert sourceDrawable to a Bitmap with size depending on device screen density.

You can also set size only for one side then the other side will match aspect ratio if the Drawable's getIntrinsicWidth() and getIntrinsicHeight() return values greater than zero. For example:

DisplayMetrics metrics = context.getResources().getDisplayMetrics();
Bitmap bitmap = BitmapUtil.toBitmap(sourceDrawable, metrics, 60f, 0);

Result Drawable will have 60dp width and the height is determined by its aspect ratio.

For cases when you are not sure that Drawable's getIntrinsicWidth() and getIntrinsicHeight() return values greater than zero you can provide fallback values that will be used if method fails to acquire the aspect ratio of source drawable. For example:

GradientDrawable gradientDrawable = new GradientDrawable();
gradientDrawable.setColor(Color.BLUE);
DisplayMetrics metrics = context.getResources().getDisplayMetrics();
Bitmap bitmap = BitmapUtil.toBitmap(gradientDrawable, metrics, 60f, 0, 60f, 60f);

In that case resultant Bitmap will have 60dp x 60dp size, because GradientDrawable#getIntrinsicHeight() returns -1.