UrlImageView.java - Abstracts Picasso behind a custom ImageView and injects Picasso via Dagger.

BootstrapModule.java

import dagger.Module;
import dagger.Provides;

@Module
(
    complete = false
)
public class BootstrapModule {
    @Provides
    Picasso providesPicasso(Context context) {
        return Picasso.with(context);
    } 
}

FunActivity.java

public class FunActivity extends FragmentActivity {
  
  @Override
    protected void onCreate(final Bundle savedInstanceState)
    {
        super.onCreate(savedInstanceState);
        
        // ... other stuff, get data model,etc
        // We'll call the data model "UserModel" in this example
        
        UrlImageView avatar = (UrlImageView) findViewById(R.id.user_avatar);
        
        // Load the Remote Image into the URL, thats it!
        avatar.setUrl(userModel.getAvatarUrl()); 
    }
 
}

PicassoSample.java

Picasso.with(getContext()).load("http://path/to/some/file.png").into(myImageView);

UrlImageView.java

package com.donnfelker.view;

import android.content.Context;
import android.util.AttributeSet;
import android.widget.ImageView;
import com.donnfelker.android.R;
import com.donnfelker.app.BootstrapApplication;
import com.squareup.picasso.Picasso;

import javax.inject.Inject;

public class UrlImageView extends ImageView
{
    @Inject Picasso picasso;

    private int defaultImageId = R.drawable.ic_placeholder;
    private String url;

    public UrlImageView(final Context context)
    {
        this(context, null);
    }

    public UrlImageView(final Context context, final AttributeSet attrs)
    {
        this(context, attrs, 0);
    }

    public UrlImageView(final Context context, final AttributeSet attrs, final int defStyle)
    {
        super(context, attrs, defStyle);
        BootstrapApplication.getInstance().inject(this);
    }

    public String getUrl() {
        return url;
    }

    public int getDefaultImageId()
    {
        return defaultImageId;
    }

    public void setDefaultImageId(final int defaultImageId)
    {
        this.defaultImageId = defaultImageId;
    }

    public void setUrl(final String url)
    {
        this.url = url;

        picasso.load(getUrl()).placeholder(getDefaultImageId()).into(this);

    }
}