public void onCreate(Bundle savedInstanceState) {
       super.onCreate(savedInstanceState);
       setContentView(R.layout.main);

       GridView gridview = (GridView) findViewById(R.id.gridview);
       gridview.setAdapter(new ImageAdapter(this));

       gridview.setOnItemClickListener(new OnItemClickListener() {
           public void onItemClick([COLOR=blue]AdapterView<?> parent[/COLOR], View v, int position, long id) {
               Toast.makeText(HelloGridView.this, "" + position, Toast.LENGTH_SHORT).show();
           }
       });
   }