How to save a JPEG image on Android with a custom quality level

Question

On Android, how do I save an image file as a JPEG at 30% quality?

In standard Java, I would use ImageIO to read the image as a BufferedImage

Answer 1

You can store your bitmap in the JPEG format by calling compress and setting the second parameter:

    Bitmap bm2 = createBitmap();
    OutputStream stream = new FileOutputStream("/sdcard/test.jpg");
    /* Write bitmap to file using JPEG and 80% quality hint for JPEG. */
    bm2.compress(CompressFormat.JPEG, 80, stream);