Custom Picasso for redirecting image URLs

README.md

CustomPicasso

A util class which helps to load redirecting image URLs using Picasso and Jake Wharton's picasso2-okhttp3-downloader.

Singleton approach -

    CustomPicasso.with(context)
        .load("http://i.imgur.com/DvpvklR.png")
        .into(imageView);

Benefit of singleton approach is to avoid memory leak.

Non singleton approach -

    Picasso customPicasso = CustomPicasso.getNewInstance(context);
    customPicasso.load("http://i.imgur.com/DvpvklR.png")
        .into(imageView);

    //After usage call shutdown to avoid memory leak e.g. in onDestroy() of activity
    customPicasso.shutdown();

build.gradle (Module: app)

android {

    ...
  
}

dependencies {

    ...
    
    compile 'com.squareup.picasso:picasso:2.5.2'
    compile 'com.jakewharton.picasso:picasso2-okhttp3-downloader:1.1.0'
}

CustomPicasso.java

import android.content.Context;
import android.util.Log;

import com.jakewharton.picasso.OkHttp3Downloader;
import com.squareup.picasso.Picasso;

/**
 * Created by Hrishikesh Kadam on 19/12/2017
 */

public class CustomPicasso {

    private static String LOG_TAG = CustomPicasso.class.getSimpleName();
    private static boolean hasCustomPicassoSingletonInstanceSet;

    public static Picasso with(Context context) {

        if (hasCustomPicassoSingletonInstanceSet)
            return Picasso.with(context);

        try {
            Picasso.setSingletonInstance(null);
        } catch (IllegalStateException e) {
            Log.w(LOG_TAG, "-> Default singleton instance already present" +
                    " so CustomPicasso singleton cannot be set. Use CustomPicasso.getNewInstance() now.");
            return Picasso.with(context);
        }

        Picasso picasso = new Picasso.Builder(context).
                downloader(new OkHttp3Downloader(context))
                .build();

        Picasso.setSingletonInstance(picasso);
        Log.w(LOG_TAG, "-> CustomPicasso singleton set to Picasso singleton." +
                " In case if you need Picasso singleton in future then use Picasso.Builder()");
        hasCustomPicassoSingletonInstanceSet = true;

        return picasso;
    }

    public static Picasso getNewInstance(Context context) {

        Log.w(LOG_TAG, "-> Do not forget to call customPicasso.shutdown()" +
                " to avoid memory leak");

        return new Picasso.Builder(context).
                downloader(new OkHttp3Downloader(context))
                .build();
    }
}