Bitmap is null when convert imageview in bitmap

Question

I need put effect blur in image, but when convert imageview into bitmap it is showing an error (NullPointerException).

See the code:

// mImages is a list of string (links http of images in web)      
Picasso.with(mContext).load(mImages.get(position)).fit().centerInside().into(imageView);
Bitmap bitmap = ((BitmapDrawable) imageView.getDrawable()).getBitmap();

aneurinc · Accepted Answer · 2017-03-19T00:11:42.987

2

Make use of Picasso callback:

Picasso.with(this)
    .load(mImages.get(position))
    .fit()
    .centerInside()
    .into(imageView, new Callback() {
        @Override 
        public void onSuccess() {
            // Drawable is ready
            Bitmap bitmap = ((BitmapDrawable) imageView.getDrawable()).getBitmap();
        }

        @Override 
        public void onError() {

        }
    });

Make sure your ImageView's width and height are NOT defined by WRAP_CONTENT.

This is because fit() requires the size of the ImageView when it is measured.

If your ImageView has its width and height defined by WRAP_CONTENT, its methods getMeasuredWidth() and getMeasuredHeight() will return 0 and you will not see the image.

edited Mar 19 '17 at 00:11

answered Mar 18 '17 at 21:41

aneurinc

1,238
12
20

Has generated this error: java.lang.IllegalStateException: Fit cannot be used with a Target. in first line – Pablo SN Mar 18 '17 at 21:55
Sorry about that. I have submitted a new answer that is working for me. – aneurinc Mar 19 '17 at 00:05

score 0 · Answer 2 · answered Mar 18 '17 at 21:14

0

Are you sure imageView != null ? wrap it inside if condition

if(imageView != null){
// write your code here
}else{
//log something like the following
Log.e("imageView","NULL");
}

Are you sure it's built? Try next code

imageView.buildDrawingCache();
Bitmap bmap = imageView.getDrawingCache();

answered Mar 18 '17 at 21:14

Seif Mostafa

58
10

I entered the verification as you suggested. The imageview is not null. I put the suggested code and it is still giving null in the bitmap – Pablo SN Mar 18 '17 at 21:44
Actually I managed to solve with the solution passed by @User123, but thanks for the help – Pablo SN Mar 19 '17 at 00:50

Bitmap is null when convert imageview in bitmap

2 Answers2