android - Animated loading image in picasso

Question

I have the following code to load an image in Picasso, using a drawable for the placeholder to display while the image is downloading. What I want though is an animated spinning progress bar style spinner that animates around and around while the image is loading, like I see in most professional apps. Picasso doesn't seem to support this, only static image drawables. Is there a way to get it working with Picasso or do I have to do something different?

Picasso.with(context).load(url)             
                    .placeholder(R.drawable.loading)
                    .error(R.drawable.image_download_error)
                    .into(view);

Answer 1

How to have a loading progress animation image using Picasso placeholder:

I solved this easily using a animated-rotate xml object.

Steps:

progress_image.png

/res/drawable/progress_animation.xml

<?xml version="1.0" encoding="utf-8"?>
<layer-list xmlns:android="http://schemas.android.com/apk/res/android">

<item android:gravity="center">
    <animated-rotate xmlns:android="http://schemas.android.com/apk/res/android"
        android:drawable="@drawable/progress_image"
        android:pivotX="50%"
        android:pivotY="50%" />
    </item>
</layer-list>

Picasso loading:

Picasso.with( context )
        .load( your_path )
        .error( R.drawable.ic_error )
        .placeholder( R.drawable.progress_animation )
        .into( image_view );