Android ImageView onclicklistenener not working

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http://stackoverflow.com – I am new to android and I tried to implement onclicklistener on image view. But it's not working.. Please help. When I click on the image it dose not responds. import android.os.Bundle; import android.app.Activity; import android.content.Intent; import android.view.Menu; import android.view.View; import android.view.View.OnClickListener; import android.widget.ImageView; public class MainActivity extends Activity { @Override protected void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); setContentView(R.layout.activity_main); } @Over (HowTos)