How to convert bitmap to PNG and then to base64 in Android?

Question

As the title implies, I\'m trying to get the user of my Android app to select an image from his device (done), I then want to scale the image down (done), compress/convert the i

Answer 1

Try this to convert bitmap into png:

 bitmap.compress(Bitmap.CompressFormat.PNG, quality, outStream);

Check method's documentation.

You can directly convert bitmap to Base64. Use this for encoding and decoding from and to Base64.

public static String encodeToBase64(Bitmap image)
{
    Bitmap immagex=image;
    ByteArrayOutputStream baos = new ByteArrayOutputStream();  
    immagex.compress(Bitmap.CompressFormat.JPEG, 100, baos);
    byte[] b = baos.toByteArray();
    String imageEncoded = Base64.encodeToString(b, Base64.DEFAULT);

    Log.e("LOOK", imageEncoded);
    return imageEncoded;
}

public static Bitmap decodeBase64(String input) 
{
    byte[] decodedByte = Base64.decode(input, 0);
    return BitmapFactory.decodeByteArray(decodedByte, 0, decodedByte.length); 
}