How to get a byte array from a drawable resource ?

问题

I would like to get a byte array from an jpeg image located in my res/drawable file ?

Does anyone know how to do that please ?

回答1:

Get a bitmap decodeResource(android.content.res.Resources, int) Then either compress it to ByteArrayOutputStream() or copyPixelsToBuffer and get your array from the buffer. http://developer.android.com/reference/android/graphics/Bitmap.html

回答2:

    Drawable drawable;

    Bitmap bitmap = ((BitmapDrawable) drawable).getBitmap();
    ByteArrayOutputStream stream = new ByteArrayOutputStream();
    bitmap.compress(Bitmap.CompressFormat.JPEG, 100, stream);
    byte[] bitmapdata = stream.toByteArray();

回答3:

ByteArrayOutputStream stream = new ByteArrayOutputStream();
mPhoto.compress(Bitmap.CompressFormat.JPEG /* FileType */,
                        100 /* Ratio */, stream);

HTH !

来源：https://stackoverflow.com/questions/2829469/how-to-get-a-byte-array-from-a-drawable-resource