How to set Alternate Row Color in a Gridview Android?

Question

How to set alternate row color in a gridview? I have searched a lot of tutorial about how to set grid view row colors,but nothing about gridview row color. I got list view with alternate row color only. I need alternate row should be white and black. Here I Include my codes. Please help me!!!!!!!!!!

Here is Java Class:

public class MainActivity extends Activity {
    GridView gridView;

    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", "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", "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", "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", "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", "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", "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" };

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

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

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

    }
    }

Here is xml:

<?xml version="1.0" encoding="utf-8"?>
<GridView xmlns:android="http://schemas.android.com/apk/res/android"
    android:id="@+id/gridView1"
    android:numColumns="10"
    android:gravity="center"
    android:columnWidth="50dp"
    android:stretchMode="columnWidth"
    android:layout_width="fill_parent"
    android:layout_height="fill_parent">
</GridView>

Please provide good tutorial or sample Example. Thanks in Advance!!!!!!!!!!!

Answer 1

Create a custom adapter and override its getView method:

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

    gridView = (GridView) findViewById(R.id.gridview1);

    MyAdapter adapter = new MyAdapter(this,
            R.layout.item, numbers);

    gridView.setAdapter(adapter);

}

public class MyAdapter extends ArrayAdapter<String> {

    String[] objects;
    Context context;

    public MyAdapter(Context context, int textViewResourceId, String[] objects) {
        super(context, textViewResourceId, objects);
        this.context = context;
        this.objects = objects;
    }


    @Override
    public View getView(int position, android.view.View convertView, android.view.ViewGroup parent) {
        TextView tv;
        if (convertView == null) {
            LayoutInflater inflater = (LayoutInflater)context.getSystemService(Context.LAYOUT_INFLATER_SERVICE);
            tv = (TextView)inflater.inflate(R.layout.item,parent,false);
        } else {
            tv = (TextView) convertView;
        }
        tv.setText(objects[position]);
        if (position % 2 == 0)
            tv.setBackgroundColor(Color.BLACK);
        else
            tv.setBackgroundColor(Color.WHITE);

        return tv;
    }
}

item.xml

<?xml version="1.0" encoding="utf-8"?>

<TextView xmlns:android="http://schemas.android.com/apk/res/android"
              android:layout_width="match_parent"
              android:layout_height="match_parent">

</TextView>