protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);

        gridView = (GridView) findViewById(R.id.gridView);
        gridAdapter = new GridViewAdapter(this, R.layout.grid_item_layout, getData());
        gridView.setAdapter(gridAdapter);
    }

private ArrayList<ImageItem> getData() {
        final ArrayList<ImageItem> imageItems = new ArrayList<>();
        TypedArray imgs = getResources().obtainTypedArray(R.array.image_ids);
        for (int i = 0; i < imgs.length(); i++) {
            Bitmap bitmap = BitmapFactory.decodeResource(getResources(), imgs.getResourceId(i, -1));
            imageItems.add(new ImageItem(bitmap, "Image#" + i));
        }
        return imageItems;
    }

mItems = new ArrayList<GridViewItem>();
Resources resources = getResources();

mItems.add(new GridViewItem(resources.getDrawable(R.drawable.aim), getString(R.string.aim)));
:
mItems.add(new GridViewItem(resources.getDrawable(R.drawable.youtube), getString(R.string.youtube)));

public class GridViewAdapter extends ArrayAdapter {
    private Context context;
    private int layoutResourceId;
    private ArrayList data = new ArrayList();

    public GridViewAdapter(Context context, int layoutResourceId, ArrayList data) {
        super(context, layoutResourceId, data);
        this.layoutResourceId = layoutResourceId;
        this.context = context;
        this.data = data;
    }

    @Override
    public View getView(int position, View convertView, ViewGroup parent) {
        View row = convertView;
        ViewHolder holder = null;

        if (row == null) {
            LayoutInflater inflater = ((Activity) context).getLayoutInflater();
            row = inflater.inflate(layoutResourceId, parent, false);
            holder = new ViewHolder();
            holder.imageTitle = (TextView) row.findViewById(R.id.text);
            holder.image = (ImageView) row.findViewById(R.id.image);
            row.setTag(holder);
        } else {
            holder = (ViewHolder) row.getTag();
        }

        ImageItem item = data.get(position);
        holder.imageTitle.setText(item.getTitle());
        holder.image.setImageBitmap(item.getImage());


    Picasso.
    with(mContext).
    load(ImageItem .Getimage())
    .placeholder(R.drawable.ic_launcher)
     .fit()
    .into(holder.imageView);

        return row;
    }

    static class ViewHolder {
        TextView imageTitle;
        ImageView image;
    }
}

//Downloading data asynchronously
public class AsyncHttpTask extends AsyncTask<String, Void, Integer> {

    @Override
    protected Integer doInBackground(String... params) {
        Integer result = 0;
        try {
            // Create Apache HttpClient
            HttpClient httpclient = new DefaultHttpClient();
            HttpResponse httpResponse = httpclient.execute(new HttpGet(params[0]));
            int statusCode = httpResponse.getStatusLine().getStatusCode();

            // 200 represents HTTP OK
            if (statusCode == 200) {
                String response = streamToString(httpResponse.getEntity().getContent());
                parseResult(response);
                result = 1; // Successful
            } else {
                result = 0; //"Failed
            }
        } catch (Exception e) {
            Log.d(TAG, e.getLocalizedMessage());
        }
        return result;
    }

    @Override
    protected void onPostExecute(Integer result) {
        // Download complete. Let us update UI
        if (result == 1) {
            mGridAdapter.setGridData(mGridImages);
            mGridAdapter.notifyDataSetChanged();
        } else {
            Toast.makeText(MainActivity.this, "No Connection found,Check your Connection!", Toast.LENGTH_SHORT).show();
        }
        mProgressBar.setVisibility(View.GONE);
    }
}

String streamToString(InputStream stream) throws IOException {
    BufferedReader bufferedReader = new BufferedReader(new InputStreamReader(stream));
    String line;
    String result = "";
    while ((line = bufferedReader.readLine()) != null) {
        result += line;
    }

    // Close stream
    if (null != stream) {
        stream.close();
    }
    return result;
}

/**
 * Parsing the feed results and get the list
 * @param result
 */
private void parseResult(String result) {
    try {

        JSONObject response = new JSONObject(result);
        JSONArray posts = response.optJSONArray("result");
        GridImages item;
        for (int i = 0; i < posts.length(); i++) {
            JSONObject post = posts.optJSONObject(i);
            String title = post.optString("name");
            String image=post.optString("path");
            item = new GridImages();
            item.Settitle(title);
            item.Setimage(image);
         //   JSONArray attachments = post.getJSONArray("attachments");
           // if (null != attachments && attachments.length() > 0) {
             //   JSONObject attachment = attachments.getJSONObject(0);
               // if (attachment != null)
                 //   item.Setimage(attachment.getString("url"));
            //}
            mGridImages.add(item);
        }
    } catch (JSONException e) {
        e.printStackTrace();
    }
}