GridView

activity_main.xml

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

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

    xmlns:app="http://schemas.android.com/apk/res-auto" 

    xmlns:tools="http://schemas.android.com/tools"     

    android:layout_width="match_parent"     

    android:layout_height="match_parent" 

    android:orientation="vertical"

    tools:context="com.example.dell.gridview.MainActivity">
 

<GridView        android:layout_width="match_parent" 

        android:layout_height="match_parent"

        android:numColumns="2"

        android:id="@+id/idGridView"/>

 </LinearLayout> 

MainActivity.java

import android.os.Bundle;
import android.support.v7.app.AppCompatActivity;
import android.widget.ArrayAdapter;
import android.widget.GridView;

        public class MainActivity extends AppCompatActivity {
            GridView gridView;
            String [] data={"data1","data2","data3","data4","data5","data6","data7","data8"};
            @Override 

             protected void onCreate(Bundle savedInstanceState) {
                super.onCreate(savedInstanceState);
                setContentView(R.layout.activity_main);
                gridView = (GridView) findViewById(R.id.idGridView);
                ArrayAdapter adapter = new ArrayAdapter(this,android.R.layout.simple_list_item_1,data);
                gridView.setAdapter(adapter);
            }
        }