How to Set Up a List of Clickable Images with GridView

Hello guys, I need your help.

My work in Android is inspired from this tutorial: http://ift.tt/1iGkWpF

I need when image in Android GridView is clicked redirect to link provided on CustomAdapter class in

Java Code:

private ImageWithUrl[] imageIds

Now when click on a image in GridView I have the crash of application.

My code follow, can you help me?

CustomAdapter class

Java Code:

public class CustomAdapter extends BaseAdapter {
    private Context context;
    private final String[] mobileValues;

    public CustomAdapter(Context context, String[] mobileValues) {
        this.context = context;
        this.mobileValues = mobileValues;
    }

    public View getView(int position, View convertView, ViewGroup parent) {

        LayoutInflater inflater = (LayoutInflater) context
                .getSystemService(Context.LAYOUT_INFLATER_SERVICE);

        View gridView;

        if (convertView == null) {

            gridView = new View(context);

            gridView = inflater.inflate(R.layout.mobile, null);

            TextView textView = (TextView) gridView
                    .findViewById(R.id.grid_item_label);
            textView.setText(mobileValues[position]);

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

            String mobile = mobileValues[position];

            if (mobile.contains("file1")) {
                imageView.setImageResource(R.drawable.file1);
            } else if (mobile.contains("file2")) {
                imageView.setImageResource(R.drawable.file2);
            } else if (mobile.contains("file3")) {
                imageView.setImageResource(R.drawable.file3);
            } else if (mobile.contains("file4")) {
                imageView.setImageResource(R.drawable.file4);
            } else if (mobile.contains("file5")) {
                imageView.setImageResource(R.drawable.file5);
            } else {
                imageView.setImageResource(R.drawable.file6);
            }

        } else {
            gridView = (View) convertView;
        }

        return gridView;
    }

    @Override
    public int getCount() {
        return mobileValues.length;
    }

    @Override
    public long getItemId(int position) {
        return 0;
    }

    @Override
    public String getItem(int position) {
        if (mobileValues != null && mobileValues.length > position) {
            return mobileValues[position];
        } else {
            return "";
        }
    }

        private ImageWithUrl[] imageIds = {
        new ImageWithUrl(R.drawable.file1, "http://ift.tt/1iFZVvl"),
        new ImageWithUrl(R.drawable.file2, "http://ift.tt/1iFZVvp"),
        new ImageWithUrl(R.drawable.file3, "http://ift.tt/1muPTO9"),
        new ImageWithUrl(R.drawable.file4, "http://ift.tt/1iFZVLG") };

    protected class ImageWithUrl extends Object {
        private int imageId;
        private String imageUrlString;

        ImageWithUrl(int id, String url) {
            imageId = id;
            imageUrlString = url;
        }

        public int getImageId() {
            return imageId;
        }

        public String getImageUrlString() {
            return imageUrlString;
        }
    }
}

Activity class

Java Code:

final String[] myPics = new String[] { mystring1, mystring2, ... };

    gridView = (GridView) findViewById(R.id.gridView1);
    final CustomAdapter myAdapter = new CustomAdapter(this, myPics);
    gridView.setAdapter(myAdapter);

    gridView.setOnItemClickListener(new OnItemClickListener() {
        public void onItemClick(AdapterView<?> parent, View v,
            int position, long id) {

            Intent i = new Intent(Intent.ACTION_VIEW);
            i.setData(Uri.parse(getItem(position).getImageUrlString()));
            startActivity(i);          

            }
        });