Resize image to full width and variable height with Picasso

Question

I have a listView with an adapter that contains ImageView of variable size (width and height). I need resize the pictures load with Picasso to the max width of

Answer 1

Picasso.get()
.load(message_pic_url)
.fit()
.centerCrop()
.placeholder(R.drawable.profile_wall_picture)
.into(holder.message_picture);

Try this code, Worked for me.

Answer 2

@Override
    protected void onResume() {
        super.onResume();

        imageView.getViewTreeObserver().addOnGlobalLayoutListener(new ViewTreeObserver.OnGlobalLayoutListener() {
            @Override
            public void onGlobalLayout() {
                loadImageIfReady();
            }
        });

    }

    private void loadImageIfReady() {
        if (imageView.getMeasuredWidth() <= 0 || mPayload == null)
            this.finish();    // if not ready GTFO

        Picasso.with(this)
                    .load(mPayload)
                    .resize(imageView.getMeasuredWidth(), imageView.getMeasuredWidth())
                    .centerInside()
                    .into(imageView);


    }

Answer 3

Finally I solved it doing a transformation of Picasso, here is the snippet:

    Transformation transformation = new Transformation() {

        @Override
        public Bitmap transform(Bitmap source) {
            int targetWidth = holder.message_picture.getWidth();

            double aspectRatio = (double) source.getHeight() / (double) source.getWidth();
            int targetHeight = (int) (targetWidth * aspectRatio);
            Bitmap result = Bitmap.createScaledBitmap(source, targetWidth, targetHeight, false);
            if (result != source) {
                // Same bitmap is returned if sizes are the same
                source.recycle();
            }
            return result;
        }

        @Override
        public String key() {
            return "transformation" + " desiredWidth";
        }
    };

    mMessage_pic_url = message_pic_url;

    Picasso.with(this.context)
        .load(message_pic_url)
        .error(android.R.drawable.stat_notify_error)
        .transform(transformation)
        .into(holder.message_picture, new Callback() {
            @Override
            public void onSuccess() {
                holder.progressBar_picture.setVisibility(View.GONE);
            }

            @Override
            public void onError() {
                Log.e(LOGTAG, "error");
                holder.progressBar_picture.setVisibility(View.GONE);
            }
    });

This line is for customize with your desired width:

int targetWidth = holder.message_picture.getWidth();

Additionally this snipped include Callback for loading hide and error drawable built-in Picasso.

If you need more information to debug any error, you MUST implement a custom listener (Picasso builder) beacuse the onError Callback information is "null". You only know that there is an error for UI behavior.

I hope this helps someone to save many hours.

Answer 4

As of Picasso 2.4.0, this operation is now directly supported. Simply add a .resize() request with one of the dimensions as 0. For example, to have a variable width, your call would become:

Picasso.with(this.context)
       .load(message_pic_url)
       .placeholder(R.drawable.profile_wall_picture)
       .resize(0, holder.message_picture.getHeight()),
       .into(holder.message_picture);

Note that this call uses .getHeight() and therefore assumes the message_picture has already been measured. If that isn't the case, such as when you have inflated a new view in a ListAdapter, you can delay this call until after measurement by adding an OnGlobalLayoutListener to the view:

holder.message_picture.getViewTreeObserver()
      .addOnGlobalLayoutListener(new ViewTreeObserver.OnGlobalLayoutListener() {
            // Wait until layout to call Picasso
            @Override
            public void onGlobalLayout() {
                // Ensure we call this only once
                imageView.getViewTreeObserver()
                         .removeOnGlobalLayoutListener(this);


                Picasso.with(this.context)
                       .load(message_pic_url)
                       .placeholder(R.drawable.profile_wall_picture)
                       .resize(0, holder.message_picture.getHeight())
                       .into(holder.message_picture);
            }
        });

Answer 5

    Picasso.with(this).load(url).resize(1800, 1800).centerInside().into(secondImageView)

    <ImageView
        android:id="@+id/SecondImage"
        android:layout_width="fill_parent"
        android:layout_height="wrap_content"
        android:layout_alignParentStart="true"
        android:layout_alignParentLeft="true"
        android:adjustViewBounds="true"
        android:layout_margin="10dp"
        android:visibility="gone"/>

This will help you with variable height of images for all devices

Answer 6

extend ImageView then override onMeasure method like the following.

@Override
    protected void onMeasure(int widthMeasureSpec, int heightMeasureSpec){
        Drawable d = getDrawable();

        if(d!=null && fittingType == FittingTypeEnum.FIT_TO_WIDTH){
            int width = MeasureSpec.getSize(widthMeasureSpec);
            int height = (int) Math.ceil((float) width * (float) d.getIntrinsicHeight() / (float) d.getIntrinsicWidth());
            setMeasuredDimension(width, height);
        }else{
            super.onMeasure(widthMeasureSpec, heightMeasureSpec);
        }
    }