Why Bitmap to Base64 String showing black background on webview in android?

Question

I am using a code that combine to images into 1 by using canvas . I show that image to ImageView it looks fine. But when I try to show that into WebView it show background b

Answer 1

The JPEG format does not support alpha transparency, which is why the transparent background becomes black when you convert your original image to JPEG.

Use the PNG format instead:

 map1.compress(Bitmap.CompressFormat.PNG, 100, baos); 

and

String imgTag = "<img src='data:image/png;base64," + imgToString               
    + "' align='left' bgcolor='ff0000'/>";