Check if the device supports webP image format

Question

Is there any way to check if the device supports an image format (webP format specifically). According to android doc (http://developer.android.com/guide/appendix/media-formats.html), webP is supported in 4.0+ devices.

But some of the 4.0+ devices are not supporting webP yet. (for ex, Noxia XL- http://developer.nokia.com/community/wiki/Nokia_X_known_issues). Is there any way to programmatically check if the device supports webP image or not.Any help would be appreciated.Thanks!

Answer 1

As far as I know there is no API for this. So solution is to try to decode some webp image on device and check if it returns Bitmap.

This can be implemented like this:

import android.graphics.Bitmap;
import android.graphics.BitmapFactory;

public class WebPUtils {
    //states
    private static final int NOT_INITIALIZED = -1;
    private static final int SUPPORTED = 1;
    private static final int NOT_SUPPORTED = 0;

    //why not boolean? we need more states for result caching
    private static int isWebPSupportedCache = NOT_INITIALIZED;

    public static boolean isWebPSupported() {
        // did we already try to check?
        if (isWebPSupportedCache == NOT_INITIALIZED) {
            //no - trying to decode
            //webp 1x1 transparent pixel with lossless
            final byte[] webp1x1 = new byte[]{
                    0x52, 0x49, 0x46, 0x46, 0x1A, 0x00, 0x00, 0x00,
                    0x57, 0x45, 0x42, 0x50, 0x56, 0x50, 0x38, 0x4C,
                    0x0D, 0x00, 0x00, 0x00, 0x2F, 0x00, 0x00, 0x00,
                    0x10, 0x07, 0x10, 0x11, 0x11, (byte) 0x88, (byte) 0x88, (byte) 0xFE,
                    0x07, 0x00
            };
            try {
                final Bitmap bitmap = BitmapFactory.decodeByteArray(webp1x1, 0, webp1x1.length);
                if (bitmap != null) {
                    //webp supported
                    isWebPSupportedCache = SUPPORTED;
                    //don't forget to recycle!
                    bitmap.recycle();
                } else {
                    //bitmap is null = not supported
                    isWebPSupportedCache = NOT_SUPPORTED;
                }
            } catch (Exception ex) {
                //we got some exception = not supported
                isWebPSupportedCache = NOT_SUPPORTED;
                ex.printStackTrace();
            }
        }
        return isWebPSupportedCache == SUPPORTED;
    }
}