# Using GridView in Android Application

• Add GridView on the activity layout which will automatically adds XML GridView object in the related xml layout as shown below

• Create Activity layout : layout/results.xml

<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"

    android:layout_width="fill_parent"

    android:layout_height="fill_parent"

    android:background="#FF234499"

    android:orientation="vertical" >

    <GridView

        android:id="@+id/resultsGrid"

        android:layout_width="fill_parent"

        android:layout_height="wrap_content"

        android:numColumns="5"

        android:background="#FF234499">

    </GridView>

</LinearLayout>

• Create Adapter which is responsible for creating cells on the GUI 

public class TextAdapter extends BaseAdapter{

     private Context c;

     private String[] list;

     public TextAdapter(Context ctx) {

          this.c = ctx;

          list = new String[50];

         

          for (int i = 0; i < list.length; i++) {

               list[i] = "Cell #" + i;

          }

     }

    

     public int getCount() {

          return list.length;

     }

     public Object getItem(int arg0) {

          return null;

     }

     public long getItemId(int arg0) {

          return 0;

     }

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

          final int p = position;

         

          TextView txtView = new TextView(c);

         

          if (position % 2 == 0) {

               txtView.setBackgroundColor(Color.BLACK);

          } else {

               txtView.setBackgroundColor(Color.WHITE);

          }

    

          //onclick enablement

          txtView.setOnClickListener(new View.OnClickListener() {

               public void onClick(View arg0) {

                    System.out.println("Postion clicked : " + p);

               }

          });

           

          txtView.setText(list[position]);

          return txtView;

     }

}

• Create linkage between GridView and application code by adding below code

public class ResultsActivity extends Activity implements View.OnClickListener {

      @Override

      protected void onCreate(Bundle savedInstanceState) {

      //grid view

      GridView resultsGrid = (GridView) findViewById(R.id.resultsGrid);

      resultsGrid.setAdapter(new TextAdapter(this));

 }