GridView in Android

activity_main.xml

<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
    xmlns:tools="http://schemas.android.com/tools"
    android:id="@+id/LinearLayout1"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    android:orientation="vertical"
    tools:context=".MainActivity" >

    <GridView
        android:id="@+id/gridView1"
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:numColumns="3" >
    </GridView>

</LinearLayout>

MainActivity.java

package com.blogspot.kantapp.gridviewinandroid;

import android.app.Activity;
import android.os.Bundle;
import android.view.View;
import android.view.ViewGroup;
import android.widget.BaseAdapter;
import android.widget.GridView;
import android.widget.ImageView;

public class MainActivity extends Activity {

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);

        GridView grid = (GridView) findViewById(R.id.gridView1);

        ImageAdapter ia = new ImageAdapter();

        grid.setAdapter(ia);

    }

    class ImageAdapter extends BaseAdapter {

        @Override
        public int getCount() {
// TODO Auto-generated method stub
            return images.length;
        }

        @Override
        public Object getItem(int position) {
// TODO Auto-generated method stub
            return null;
        }

        @Override
        public long getItemId(int position) {
// TODO Auto-generated method stub
            return 0;
        }

        @Override
        public View getView(int position, View convertView, ViewGroup parent) {
// TODO Auto-generated method stub
            ImageView image = new ImageView(getApplicationContext());

            image.setLayoutParams(new GridView.LayoutParams(100, 100));

            image.setImageResource(images[position]);

            return image;
        }

    }

    int[] images = { R.mipmap.ic_launcher, R.mipmap.ic_launcher, R.mipmap.ic_launcher,
            R.mipmap.ic_launcher, R.mipmap.ic_launcher, R.mipmap.ic_launcher, R.mipmap.ic_launcher,
            R.mipmap.ic_launcher, R.mipmap.ic_launcher, R.mipmap.ic_launcher };

}