Vfrdtyky

I am using a custom gridview adapter to show images with volley singleton. But when I run it it returns the onErrorResponse. It looks like the adapter is not even set properly, is it something with where i set the adapter? I have tried setting it in onCreate but same error.

The adapter class looked fine so I think the problem is in MainActivity.

MainActivity.java:

public class MainActivity extends AppCompatActivity {



private final int THUMBNAIL_SIZE = 250;

private final String KEY = "IMAGE";

ArrayList<Bitmap> bitmaps = new ArrayList<Bitmap>();

private static final String URLS = {

    "http://10.0.2.2/Android%20A4_1/germany.png",

    "http://10.0.2.2/Android%20A4_1/indonesia.png",

    "http://10.0.2.2/Android%20A4_1/japan.png",

    "http://10.0.2.2/Android%20A4_1/sarawak.png",

    "http://10.0.2.2/Android%20A4_1/singapore.png",

    "http://10.0.2.2/Android%20A4_1/switzerland.png",

};





@Override

protected void onCreate(Bundle savedInstanceState) {

    super.onCreate(savedInstanceState);

    setContentView(R.layout.activity_main);







    for(int i = 0; i<URLS.length; i++) {

        LoadingImages(URLS[i]);

    }

}



private void LoadingImages(String url) {

    ImageLoader imageLoader = MySingleton.getInstance(getApplicationContext()).getImageLoader();

    imageLoader.get(url, new ImageLoader.ImageListener() {

        @Override

        public void onResponse(ImageLoader.ImageContainer response, boolean isImmediate) {

            Bitmap image = response.getBitmap();

            Bitmap thumbnail = ThumbnailUtils.extractThumbnail(image, THUMBNAIL_SIZE, THUMBNAIL_SIZE);

            bitmaps.add(thumbnail);



            GridView gridView = (GridView)findViewById(R.id.grid_layout);



            final ImageAdapter imageAdapter = new ImageAdapter(MainActivity.this, bitmaps);

            gridView.setAdapter(imageAdapter);



            gridView.setOnItemClickListener(new AdapterView.OnItemClickListener() {

                @Override

                public void onItemClick(AdapterView<?> adapterView, View view, int i, long l) {

                    Intent intent = new Intent(getApplicationContext(), Main2Activity.class);

                    intent.putExtra(KEY, URLS[i]);

                    startActivity(intent);

                }

            });

        }



        @Override

        public void onErrorResponse(VolleyError error) {

            Log.e("error", error.getMessage());

        }

    });

}

}

The Adapter class:

public class ImageAdapter extends BaseAdapter {

private Context mContext;

private ArrayList<Bitmap> bitmaps;



public ImageAdapter(Context context, ArrayList<Bitmap> bitmaps) {

    this.mContext = context;

    this.bitmaps = bitmaps;

}



@Override

public int getCount() {

    return 0;

}



@Override

public Object getItem(int i) {

    return null;

}



@Override

public long getItemId(int i) {

    return 0;

}



@Override

public View getView(int i, View view, ViewGroup viewGroup) {





    if (view == null) {

      final LayoutInflater layoutInflater = LayoutInflater.from(mContext);

      view = layoutInflater.inflate(R.layout.griditems, null);

      MyViewHolder myViewHolder = new MyViewHolder(view);

      view.setTag(myViewHolder);

    }

    MyViewHolder myViewHolder = (MyViewHolder)view.getTag();

    myViewHolder.img.setImageBitmap(bitmaps.get(i));



    return view;

}



public class MyViewHolder {

   public ImageView img;



   public MyViewHolder(View view) {

       img = view.findViewById(R.id.image1);

   }

}

}

My Singleton:

public class MySingleton {

private static MySingleton instance;

private RequestQueue requestQueue;

private ImageLoader imageLoader;

private static Context context;



private MySingleton(Context context){

    this.context = context;

    requestQueue = Volley.newRequestQueue(context);

    imageLoader = new ImageLoader(requestQueue, new ImageLoader.ImageCache() {

        private final LruCache<String, Bitmap> cache = new LruCache<>(6);

        @Override

        public Bitmap getBitmap(String url) {

            Bitmap bmp = cache.get(url);

            if (bmp == null) {

                System.out.println("Not in cache");

            } else {

                System.out.println("In cache");

            }



            return bmp;

        }



        @Override

        public void putBitmap(String url, Bitmap bitmap) {

            System.out.println("Put in cache");

            cache.put(url, bitmap);

        }

    });

}



public static synchronized MySingleton getInstance(Context context) {

    if (instance == null) {

        instance = new MySingleton(context);

    }

    return instance;

}



public ImageLoader getImageLoader() {

    return imageLoader;

}

}

Main2Activity:

public class Main2Activity extends AppCompatActivity {



private ImageView imageView;

private final String KEY = "IMAGE";



@Override

protected void onCreate(Bundle savedInstanceState) {

    super.onCreate(savedInstanceState);

    setContentView(R.layout.activity_main2);



    imageView = (ImageView)findViewById(R.id.imageView);

    Bundle bundle = getIntent().getExtras();

    String url = bundle.getString(KEY);

    LoadingImages(url);

}



private void LoadingImages(String url) {

    final ImageLoader imageLoader = MySingleton.getInstance(getApplicationContext()).getImageLoader();

    imageLoader.get(url, new ImageLoader.ImageListener() {

        @Override

        public void onResponse(ImageLoader.ImageContainer response, boolean isImmediate) {

            Bitmap bitmap = response.getBitmap();

            imageView.setImageBitmap(bitmap);

        }



        @Override

        public void onErrorResponse(VolleyError error) {

            Log.e("Error", error.getMessage());

        }

    });

}

}

change This methods

@Override

public int getCount() {

return 0;

}



@Override

public Object getItem(int i) {

return null;

}



@Override

public long getItemId(int i) {

return 0;

 }

To

@Override

public int getCount() {

return bitmaps.size;

}



@Override

public Object getItem(int i) {

return bitmaps.get(i);

}



@Override

public long getItemId(int i) {

return i;

 }