android - OkHTTP and Picasso don't run together

Question

I use Picasso library in my project to load images ande cache them. It works good without any problem. However, when I try to use OkHttp library to perform data communication with my server (JSON communication), Picasso throws exceptions.

I use the following jars : okhttp-2.0.0-RC2, okio-1.0.0, picasso-2.2.0. When I run my project after I add these jars, It crashes with the following :

06-12 11:13:15.824: E/dalvikvm(12105): Could not find class 'com.squareup.okhttp.HttpResponseCache', referenced from method com.squareup.picasso.OkHttpDownloader.<init>

I added okhttp just to use the following method :

public static String executeHttpGet(String urlStr) {
    Response response = null;
    String result = "";
    OkHttpClient client = new OkHttpClient();

    try {
        Request request = new Request.Builder().url(urlStr).build();

        response = client.newCall(request).execute();
        result = response.body().string();
    } catch (Exception ex) {

    }
    return result;
}

The above code works without any problem. However the codes which use Picasso library and used to work perfectly, start to throw the following excecption :

06-12 11:19:49.307: E/AndroidRuntime(13036): FATAL EXCEPTION: main
06-12 11:19:49.307: E/AndroidRuntime(13036): java.lang.NoClassDefFoundError: com.squareup.okhttp.HttpResponseCache
06-12 11:19:49.307: E/AndroidRuntime(13036):    at com.squareup.picasso.OkHttpDownloader.<init>(OkHttpDownloader.java:74)
06-12 11:19:49.307: E/AndroidRuntime(13036):    at com.squareup.picasso.OkHttpDownloader.<init>(OkHttpDownloader.java:51)
06-12 11:19:49.307: E/AndroidRuntime(13036):    at com.squareup.picasso.OkHttpDownloader.<init>(OkHttpDownloader.java:41)
06-12 11:19:49.307: E/AndroidRuntime(13036):    at com.squareup.picasso.Utils$OkHttpLoaderCreator.create(Utils.java:319)
06-12 11:19:49.307: E/AndroidRuntime(13036):    at com.squareup.picasso.Utils.createDefaultDownloader(Utils.java:171)
06-12 11:19:49.307: E/AndroidRuntime(13036):    at com.squareup.picasso.Picasso$Builder.build(Picasso.java:490)
06-12 11:19:49.307: E/AndroidRuntime(13036):    at com.squareup.picasso.Picasso.with(Picasso.java:390)

My Class Path :

If I remove okhttp-2.0.0-RC2, okio-1.0.0, Picasso lines work.

Why is that happening ? How can I use two libraries together ?

Answer 1

This combination works for me:

compile 'com.squareup.okhttp:okhttp:2.2.0'
compile 'com.squareup.okhttp:okhttp-urlconnection:2.2.0'
compile 'com.squareup.picasso:picasso:2.4.0'