Main Image Picasso

package com.yoesuv.demoretrofit;

import android.os.Bundle;
import android.support.v7.app.AppCompatActivity;
import android.support.v7.widget.Toolbar;
import android.view.MenuItem;
import android.widget.ImageView;

import com.squareup.picasso.Picasso;

public class MainImage extends AppCompatActivity {

    public static String EXTRA_NAMA = "extra nama";
    public static String EXTRA_IMAGE = "extra image";

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_image);

        Toolbar toolbar = (Toolbar) findViewById(R.id.toolbar);
        setSupportActionBar(toolbar);

        if(getSupportActionBar()!=null){
            getSupportActionBar().setElevation(5);
            getSupportActionBar().setDisplayHomeAsUpEnabled(true);
            getSupportActionBar().setTitle(getIntent().getExtras().getString(EXTRA_NAMA));
        }

        ImageView imgView = (ImageView) findViewById(R.id.imageView);
        Picasso.with(this).load(getIntent().getExtras().getString(EXTRA_IMAGE)).into(imgView);
    }

    @Override
    public boolean onOptionsItemSelected(MenuItem item) {
        switch(item.getItemId()){
            case android.R.id.home :
                MainImage.this.finish();
                return true;
        }
        return super.onOptionsItemSelected(item);
    }
}