how to perform test to the GridView in onclick position

I write a testing to the Grid View to count the number of items in the grid. i want to perform onclick to the grid view

here is a my mainActivity class

public class MainActivity extends AppCompatActivity {
GridView gridView;
@Override
public void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); setContentView(R.layout.activity_main); gridView = (GridView) findViewById(R.id.gridview1); gridView.setAdapter(new ImageAdapter(this)); gridView.setOnItemClickListener(new AdapterView.OnItemClickListener() { public void onItemClick(AdapterView<?> parent, View v, int position, long id) { // Send intent to SingleViewActivity Intent i = new Intent(getApplicationContext(), SingleViewActivity.class); // Pass image index i.putExtra("id", position); startActivity(i); } });
}
}

SingleViewActivity.Java

public class SingleViewActivity extends Activity{
@Override
public void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); setContentView(R.layout.single_view); // Get intent data Intent i = getIntent(); // Selected image id int position = i.getExtras().getInt("id"); ImageAdapter imageAdapter = new ImageAdapter(this); ImageView imageView = (ImageView) findViewById(R.id.SingleView); imageView.setImageResource(imageAdapter.mThumbIds[position]);
}
}

ImageAdapter.java

public class ImageAdapter extends BaseAdapter {
private Context mContext;
// Constructor
public ImageAdapter(Context c) { mContext = c;
}
@Override
public int getCount() { retu mThumbIds.length;
}
@Override
public Object getItem(int position) { retu null;
}
@Override
public long getItemId(int position) { retu 0;
}
@Override
public View getView(int position, View convertView, ViewGroup parent) { ImageView imageView; if (convertView == null) { imageView = new ImageView(mContext); imageView.setLayoutParams(new GridView.LayoutParams(85, 85)); imageView.setScaleType(ImageView.ScaleType.CENTER_CROP); imageView.setPadding(8, 8, 8, 8); } else { imageView = (ImageView) convertView; } imageView.setImageResource(mThumbIds[position]); retu imageView;
}
public Integer[] mThumbIds = { R.drawable.images, R.drawable.asdawe, R.drawable.bokey, R.drawable.assd, R.drawable.download, R.drawable.ew, R.drawable.lilly, R.drawable.jh, R.drawable.rose, R.drawable.we, R.drawable.lilly1, R.drawable.images, R.drawable.bokey, R.drawable.asdawe, R.drawable.download, R.drawable.ew, R.drawable.jh, R.drawable.lilly, R.drawable.rose, R.drawable.we, R.drawable.lilly1, R.drawable.images
};
}

MainActivityTest.java

public class MainActivityTest extends ActivityInstrumentationTestCase<MainActivity> {
private MainActivity mActivity;
private GridView mGridView;
private Instrumentation mInstrumentation;
public MainActivityTest() { super("com.android.frameworks.coretests", MainActivity.class);
}
@Override
protected void setUp() throws Exception { super.setUp(); mActivity = getActivity(); mGridView = (GridView) mActivity.findViewById(R.id.gridview1); mInstrumentation = getInstrumentation();
}
@MediumTest
public void testPreconditions() { assertNotNull(mActivity); assertNotNull(mGridView);
}
@LargeTest
public void testSetSelection() { mGridView = new GridView(mActivity); mGridView.setSelection(0); assertEquals(0, mGridView.getSelectedItemPosition()); mGridView.setSelection(-1); assertEquals(-1, mGridView.getSelectedItemPosition()); mGridView.setSelection(mGridView.getCount()); assertEquals(mGridView.getCount(), mGridView.getSelectedItemPosition());
}
@Test
public void testSetSelectionone() { TouchUtils.dragQuarterScreenDown(this); TouchUtils.dragQuarterScreenUp(this); // Nothing should be selected assertEquals("Selection still available after touch", -1, mGridView.getSelectedItemPosition()); final int targetPosition = mGridView.getAdapter().getCount() ; assertEquals(22,targetPosition);
}
}

i want a test for the on click on the Grid View