serkan stack serkan stack - 9 months ago 55
Android Question

java.lang.IllegalArgumentException: Context must not be null

I am using adapter to show images. In Adapter, How to get context when using Picasso?
I tried different solutions but I couldn't solve. What should I do when using picasso in Adapter? Context is a big problem for developers I see on the internet.

package gc.x;

import android.content.Context;
import android.view.LayoutInflater;
import android.view.View;
import android.view.ViewGroup;
import android.widget.ImageView;
import android.widget.TextView;

import com.squareup.picasso.Picasso;

import gc.ovidos_challenge.R;
import gc.ovidos_challenge.models.Image;

import java.util.List;

public class ImagesAdapter extends RecyclerView.Adapter<ImagesAdapter.MyViewHolder> {

private List<Image> imagesList;

private Context context;

public ImagesAdapter(Context context) {
this.context = context;

public class MyViewHolder extends RecyclerView.ViewHolder {
public TextView title;
public ImageView imageview;

public MyViewHolder(View view) {
title = (TextView) view.findViewById(;
imageview = (ImageView) view.findViewById(;


public ImagesAdapter(List<Image> imagesList) {
this.imagesList = imagesList;

public MyViewHolder onCreateViewHolder(ViewGroup parent, int viewType) {
View itemView = LayoutInflater.from(parent.getContext()).inflate(R.layout.list_image, parent, false);

return new MyViewHolder(itemView);

public void onBindViewHolder(MyViewHolder holder, int position) {
Image image = imagesList.get(position);

// holder.imageview.setImageBitmap(image.getBitmapFromURL());


public int getItemCount() {
return imagesList.size();


Answer Source

you have created two constructors one for context and one for your data. use one constructor to initialize both of them

like this

public ImagesAdapter(Context context,List<Image> imagesList) {
        this.context = context;