I encounter this problem only on lollipop version. I can run the app easily on versions above lollipop. The error shows up when I run the app in my application file:
You need to install Multidex to run picasso on lower devices
public class MyApplication extends Application {
@Override
protected void attachBaseContext(Context base) {
super.attachBaseContext(base);
MultiDex.install(base);
}
}
add this in your manifest under application tag
android:name="your.package.name.MyApplication"