Android List Adapter

package comu.metrox.arrayadapertdemo;

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

public class MainActivity extends AppCompatActivity {

@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
ListView list1 = (ListView)findViewById(R.id.listView);
ListView list2 = (ListView)findViewById(R.id.listView2);
String[] array1 = new String[]{"IOS","Android","Windows Mobile 10"};
String[] array2 = new String[]{"C#","SQL","Swift","Go"};
ArrayAdapter<String> adapter1 = new ArrayAdapter<String>(this,R.layout.array_item,array1);
list1.setAdapter(adapter1);
}
}

<?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="wrap_content"
android:textSize="24dp"
android:padding="10px"
android:shadowColor="#f0f"
android:shadowDx="4"
android:shadowDy="4"
android:shadowRadius="2"
android:id="@+id/textView" />

<?xml version="1.0" encoding="utf-8"?>
<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"
android:paddingBottom="@dimen/activity_vertical_margin"
android:paddingLeft="@dimen/activity_horizontal_margin"
android:paddingRight="@dimen/activity_horizontal_margin"
android:paddingTop="@dimen/activity_vertical_margin"
tools:context="comu.metrox.arrayadapertdemo.MainActivity">

<ListView
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:id="@+id/listView"
android:divider="#f00"
android:dividerHeight="2px" />

<ListView
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:id="@+id/listView2"
android:dividerHeight="2px"
android:divider="#0f0" />
</RelativeLayout>