Can't load image.

[umer93379]

package com.example.umer9.lbfvf1.user;

import android.content.Intent;
import android.os.Bundle;
import android.support.v7.app.AppCompatActivity;
import android.view.View;
import android.widget.AdapterView;
import android.widget.ImageView;
import android.widget.ListView;
import android.widget.Toast;

import com.amigold.fundapter.BindDictionary;
import com.amigold.fundapter.FunDapter;
import com.amigold.fundapter.extractors.StringExtractor;
import com.amigold.fundapter.interfaces.DynamicImageLoader;
import com.example.umer9.lbfvf1.R;
import com.kosalgeek.android.json.JsonConverter;
import com.kosalgeek.genasync12.AsyncResponse;
import com.kosalgeek.genasync12.PostResponseAsyncTask;
import com.squareup.picasso.Picasso;

import java.io.Serializable;
import java.util.ArrayList;

public class ListActivity extends AppCompatActivity implements AsyncResponse,
AdapterView.OnItemClickListener{

final String LOG = "ListActivity";
private ArrayList<Post> bookList;
private ListView lvBook;

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

    Bundle searchThis= getIntent().getExtras();
    String myParam = searchThis.getString("searchThis");

    PostResponseAsyncTask taskRead = new PostResponseAsyncTask(ListActivity.this, this);
    taskRead.execute("http://10.0.0.102/lbf_fyp/api/search.php?string="+myParam);
}

@Override
public void processFinish(String s) {

    if (s == null || s.isEmpty()) {

        Intent intent = new Intent(ListActivity.this, User_Main.class);
        Toast.makeText(ListActivity.this, "No Record Found", Toast.LENGTH_LONG).show();
        startActivity(intent);
    }
    else {

        ArrayList<Post> bookList = new JsonConverter<Post>().toArrayList(s, Post.class);
        BindDictionary<Post> dict = new BindDictionary<Post>();

        dict.addStringField(R.id.title, new StringExtractor<Post>() {
            @Override
            public String getStringValue(Post item, int position) {
                return item.b_title;
            }
        });
        dict.addStringField(R.id.author, new StringExtractor<Post>() {
            @Override
            public String getStringValue(Post item, int position) {
                return item.b_author;
            }
        });
        dict.addStringField(R.id.isbn, new StringExtractor<Post>() {
            @Override
            public String getStringValue(Post item, int position) {
                return item.b_isbn;
            }
        });
        dict.addStringField(R.id.avail_on, new StringExtractor<Post>() {
            @Override
            public String getStringValue(Post item, int position) {
                return ""+item.last_availbleDate;
            }
        });
        dict.addStringField(R.id.rownum, new StringExtractor<Post>() {
            @Override
            public String getStringValue(Post item, int position) {
                return "" + item.b_row;
            }
        });
        dict.addStringField(R.id.standnum, new StringExtractor<Post>() {
            @Override
            public String getStringValue(Post item, int position) {
                return "" + item.b_stand;
            }
        });
        dict.addStringField(R.id.shelvenum, new StringExtractor<Post>() {
            @Override
            public String getStringValue(Post item, int position) {
                return "" + item.b_shelf;
            }
        });
       dict.addDynamicImageField(R.id.b_img, new StringExtractor<Post>() {
           @Override
           public String getStringValue(Post item, int position) {
               return item.b_img;
           }
       }, new DynamicImageLoader() {
           @Override
           public void loadImage(String url, ImageView view) {
               Picasso.with(ListActivity.this).load(url).into(view);
           }
       });

        FunDapter<Post> adapter = new FunDapter<>(ListActivity.this,
                bookList, R.layout.books_list, dict);
        lvBook = (ListView) findViewById(R.id.lvBook);
        lvBook.setAdapter(adapter);
    }
}

@Override
public void onItemClick(AdapterView<?> parent, View view, int position, long id) {
    Post selectedBook = bookList.get(position);
    Intent intent = new Intent(ListActivity.this, DetaileActivity.class);
    intent.putExtra("book", (Serializable) selectedBook);
    startActivity(intent);
}

}
//Serialized data
public class Post {

@SerializedName("b_title")
public String b_title;

@SerializedName("b_author")
public  String b_author;


@SerializedName("b_isbn")
public  String b_isbn;

@SerializedName("last_availbleDate")
public  String last_availbleDate;

@SerializedName("b_row")
public  int b_row;

@SerializedName("b_stand")
public  int b_stand;

@SerializedName("b_shelf")
public  int b_shelf;

@SerializedName("b_img")
public String b_img;

}

//In you given video part 1, I tried to put an image in listView. Here's my XML

<RelativeLayout
    android:id="@+id/left"
    android:layout_weight="1"
    android:layout_margin="6dp"
    android:layout_width="match_parent"
    android:layout_height="170dp"
    android:background="@color/itembg">

    <RelativeLayout
        android:id="@+id/tv"
        android:layout_width="215dp"
        android:layout_height="wrap_content"
        android:layout_alignBaseline="@+id/headings"
        android:layout_alignBottom="@+id/headings"
        android:layout_alignParentLeft="true"

        android:layout_alignParentStart="true"
        android:layout_margin="6dp"
        android:layout_toEndOf="@+id/headings"
        android:layout_toRightOf="@+id/headings">

        <TextView
            android:id="@+id/title"
            android:layout_width="match_parent"
            android:layout_height="wrap_content"
            android:layout_alignParentTop="true"
            android:textAppearance="@style/Base.TextAppearance.AppCompat.Body1"
            android:textSize="15dp" />

        <TextView
            android:id="@+id/author"
            android:layout_width="match_parent"
            android:layout_height="wrap_content"
            android:layout_alignLeft="@+id/title"
            android:layout_alignStart="@+id/title"
            android:layout_below="@+id/title"
            android:textSize="15dp" />

        <TextView
            android:id="@+id/isbn"
            android:layout_width="match_parent"
            android:layout_height="wrap_content"
            android:layout_alignLeft="@+id/author"
            android:layout_alignStart="@+id/author"
            android:layout_below="@+id/author"
            android:width="@dimen/activity_vertical_margin"
            android:textSize="15dp" />

        <TextView
            android:id="@+id/avail_on"
            android:layout_width="match_parent"
            android:layout_height="wrap_content"
            android:layout_alignLeft="@+id/isbn"
            android:layout_alignStart="@+id/isbn"
            android:layout_below="@+id/isbn"
            android:width="@dimen/activity_vertical_margin"
            android:textSize="15dp" />

    </RelativeLayout>

    <RelativeLayout
        android:layout_width="150dp"
        android:layout_height="100dp"
        android:layout_alignParentEnd="true"
        android:layout_alignParentRight="true"
        android:layout_alignParentTop="false">

        <ImageView
            android:id="@+id/b_img"
            android:layout_width="wrap_content"
            android:layout_height="wrap_content" />

    </RelativeLayout>

    <RelativeLayout
        android:id="@+id/rss_headings"
        android:layout_below="@+id/tv"
        android:layout_marginTop="8dp"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content">

        <LinearLayout
            android:layout_width="match_parent"
            android:layout_height="wrap_content"
            android:layout_alignParentStart="true"
            android:layout_alignParentLeft="true"
            android:weightSum="3">

            <TextView
                android:id="@+id/row"
                android:layout_width="wrap_content"
                android:layout_height="wrap_content"
                android:layout_weight="1"
                android:layout_marginLeft="20dp"
                android:layout_marginStart="20dp"
                android:text="Row"
                android:textSize="15dp" />


            <TextView
                android:id="@+id/stand"
                android:layout_width="wrap_content"
                android:layout_height="wrap_content"
                android:layout_weight="1"
                android:text="Stand"
                android:textSize="15dp" />


            <TextView
                android:id="@+id/shelve"
                android:layout_width="wrap_content"
                android:layout_height="wrap_content"
                android:layout_weight="1"
                android:layout_marginEnd="20dp"
                android:layout_marginRight="20dp"
                android:text="Shelve"
                android:textSize="15dp" />


        </LinearLayout>

    </RelativeLayout>

    <LinearLayout
        android:layout_below="@+id/rss_headings"
        android:layout_width="match_parent"
        android:layout_height="match_parent"
        android:weightSum="3">

        <TextView
            android:id="@+id/rownum"
            android:layout_weight="1"
            android:textSize="20dp"
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"
            android:layout_marginLeft="30dp"
            android:layout_marginStart="30dp"/>
        <TextView
            android:id="@+id/standnum"
            android:layout_weight="1"
            android:textSize="20dp"
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"/>
        <TextView
            android:id="@+id/shelvenum"
            android:layout_weight="1"
            android:layout_marginEnd="35dp"
            android:layout_marginRight="35dp"
            android:textSize="20dp"
            android:layout_width="wrap_content"
            android:layout_height="wrap_content" />
    </LinearLayout>

</RelativeLayout>