GridView Example in Android

GridView is a ViewGroup that displays items in a two-dimensional, scrollable grid. The grid items are automatically inserted to the layout using a Adapter.


Here The below Example Project shows GridView With A to Z TextView Elements.
UI Layout(grid_view_example.xml)

<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
    xmlns:tools="http://schemas.android.com/tools"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    tools:context=".GridViewExample" >

    <GridView
        android:id="@+id/gridView"
        android:layout_width="match_parent"
        android:layout_height="fill_parent"
        android:layout_centerHorizontal="true"
        android:numColumns="3" >
    </GridView>

</RelativeLayout>

Android Activity Class(GridViewExample.java)

package com.androidsurya.androidgridviewexample;

import android.os.Bundle;
import android.app.Activity;
import android.view.Menu;
import android.view.View;
import android.widget.AdapterView;
import android.widget.AdapterView.OnItemClickListener;
import android.widget.ArrayAdapter;
import android.widget.GridView;
import android.widget.TextView;
import android.widget.Toast;

public class GridViewExample extends Activity {

    static final String[] numbers = new String[] { "A", "B", "C", "D", "E",
            "F", "G", "H", "I", "J", "K", "L", "M", "N", "O", "P", "Q", "R",
            "S", "T", "U", "V", "W", "X", "Y", "Z" };
    GridView gridView;

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.grid_view_example);
        gridView = (GridView) findViewById(R.id.gridView);

        ArrayAdapter<String> adapter = new ArrayAdapter<String>(this,
                android.R.layout.simple_list_item_1, numbers);

        gridView.setAdapter(adapter);

        gridView.setOnItemClickListener(new OnItemClickListener() {

            @Override
            public void onItemClick(AdapterView<?> parent, View v,
                    int position, long id) {
                // TODO Auto-generated method stub

                Toast.makeText(getApplicationContext(),
                        "Selected: " + ((TextView) v).getText(),
                        Toast.LENGTH_SHORT).show();

            }
        });
    }

    @Override
    public boolean onCreateOptionsMenu(Menu menu) {
        // Inflate the menu; this adds items to the action bar if it is present.
        getMenuInflater().inflate(R.menu.grid_view_example, menu);
        return true;
    }

}

Register Activity in AndroidManifest file

<activity
            android:name="com.androidsurya.androidgridviewexample.GridViewExample"
            android:label="@string/app_name" >

Output Screenshot

For more information about GridView :- Android Developers site