Android中Bitmap、Drawable、byte[]互换

1.Drawable—>Bitmap查看源代码打印帮助Resources res=getResources();Bitmap bmp=BitmapFactory.decodeResource(res, R.drawable.sample_0);2.Bitmap---->DrawableDrawable drawable =new BitmapDrawable(bmp);另外在网上搜了一些其它的方法，在这里分享下1、Drawable → Bitmappublic static Bitmap drawableToBitmap(Drawable drawable){ Config config; if (drawable.getOpacity() != PixelFormat.OPAQUE) { config = Bitmap.Config.ARGB_8888; } else { config = Bitmap.Config.RGB_565; } Bitmap bitmap = Bitmap.createBitmap(drawable.getIntrinsicWidth(), rawable.getIntrinsicHeight(),config); Canvas canvas = new Canvas(bitmap); // canvas.setBitmap(bitmap); drawable.setBounds(0, 0, drawable.getIntrinsicWidth(), drawable.getIntrinsicHeight()); drawable.draw(canvas); return bitmap;}2、从资源中获取BitmapResources res=getResources();Bitmap bmp=BitmapFactory.decodeResource(res, R.drawable.pic);3、Bitmap → byte[]private byte[] Bitmap2Bytes(Bitmap bm){ ByteArrayOutputStream baos = new ByteArrayOutputStream(); bm.compress(Bitmap.CompressFormat.PNG, 100, baos); return baos.toByteArray();}4、byte[] → Bitmapprivate Bitmap Bytes2Bimap(byte[] b){ if (b.length != 0) { return BitmapFactory.decodeByteArray(b, 0, b.length); } else { return null; }}