CODEWITHSUNDEEP
androidbase64picasso
user2288903
user2288903

Reputation: 41

Converting base64 into bitmap and loading into recycler view

I'm trying to convert base64 image into bitmap image and then load it using picasso library into a recycler view. However, I get an error whenever I run my code saying I need to pass in a URI into the picasso method. 

    public String getImage(){
      Context context =null;

        byte[] decodedString = Base64.decode(image, Base64.URL_SAFE);
        Bitmap decodedByte = BitmapFactory.decodeByteArray(decodedString, 0, decodedString.length);


        ByteArrayOutputStream bytes = new ByteArrayOutputStream();
        decodedByte.compress(Bitmap.CompressFormat.PNG, 100, bytes);

      path = MediaStore.Images.Media.insertImage(context.getContentResolver(), decodedByte, null, null);
        return Uri.parse(path);    
}

DataAdapter:

 Picasso.with(context).load(data.get(i).getImage()).into(holder.reportImage);

Upvotes: 1

Views: 3059

Answers (2)

Annsh Singh
Annsh Singh

Reputation: 435

Assuming that you are using base64 image as a placeholder for your item in recycler view I suggest you use this method to convert base64 string to bitmap -

 fun fromBase64ToBitmap(context: Context, base64string: String?): BitmapDrawable {
    val decodedString = Base64.decode(string, Base64.DEFAULT)
    val bitmap = BitmapFactory.decodeByteArray(decodedString, 0, decodedString.size)
    return BitmapDrawable(context.resources, bitmap)
}

and set 

picasso.load(your_high_quality_image)
       .placeholder(bitmapDrawableFromAboveMethod)
       .into(imageHolder)

Hope this helps.

Note: Code is in Kotlin but you can easily convert it in java

Upvotes: 1

dev.bmax
dev.bmax

Reputation: 10621

Once you have downloaded and decoded a bitmap, there is no point of using an image loading library. All of the benefits (request queue and cache) are lost. You can simply use holder.reportImage.setImageBitmap(bmp);

Another approach would be to write a custom RequestHandler, that will decode the base64 data after downloading.

Upvotes: 1

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