Here you can find the source of convertDrawableToBitmap(Drawable drawable)
public static Bitmap convertDrawableToBitmap(Drawable drawable)
//package com.java2s; //License from project: Open Source License import android.graphics.Bitmap; import android.graphics.Canvas; import android.graphics.PixelFormat; import android.graphics.drawable.Drawable; public class Main { public static Bitmap convertDrawableToBitmap(Drawable drawable) { Bitmap bitmap = Bitmap/* www . j av a 2 s . c om*/ .createBitmap( drawable.getIntrinsicWidth(), drawable.getIntrinsicHeight(), drawable.getOpacity() != PixelFormat.OPAQUE ? Bitmap.Config.ARGB_8888 : Bitmap.Config.RGB_565); Canvas canvas = new Canvas(bitmap); drawable.setBounds(0, 0, drawable.getIntrinsicWidth(), drawable.getIntrinsicHeight()); drawable.draw(canvas); return bitmap; } }