Android中Bitmap、Drawable、byte[]转换

// Android中Bitmap、Drawable、byte[]转换// 1.Drawable—>BitmapResources res = getResources();Bitmap bmp = BitmapFactory.decodeResource(res, R.drawable.sample_0);// 2.Bitmap---->DrawableDrawable drawable = new BitmapDrawable(bmp);// 另外在网上搜了些，也不知到底谁是原创的// 1、Drawable → Bitmappublic static Bitmap drawableToBitmap(Drawable drawable) {Bitmap bitmap = Bitmap.createBitmap(drawable.getIntrinsicWidth(),drawable.getIntrinsicHeight(),drawable.getOpacity() != PixelFormat.OPAQUE ? Bitmap.Config.ARGB_8888: Bitmap.Config.RGB_565);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;}}
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