Dynamic Array and component intialization in Android

package com.example.dynamicview;

import java.util.ArrayList;

import android.app.Activity;
import android.app.ActionBar;
import android.app.Fragment;
import android.os.Bundle;
import android.view.LayoutInflater;
import android.view.Menu;
import android.view.MenuItem;
import android.view.View;
import android.view.ViewGroup;
import android.view.ViewGroup.LayoutParams;
import android.widget.RelativeLayout;
import android.widget.TextView;
import android.os.Build;

public class MainActivity extends Activity {

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

       
//        String[] StringArray = { "one", "two", "three", "four", "five" };
        ArrayList<String> name = new ArrayList<String>();
        name.add("Google");
        name.add("Microsoft");
        name.add("Apple");
        name.add("Oracle");
        int topval=100;
       
        RelativeLayout layout = new RelativeLayout(this);
        RelativeLayout.LayoutParams relativeParams = new RelativeLayout.LayoutParams(
                LayoutParams.WRAP_CONTENT, LayoutParams.WRAP_CONTENT);
        for (int i = 0; i < name.size(); i++) {
            TextView tv = new TextView(getApplicationContext());
            tv.setText(name.get(i));
            relativeParams.addRule(RelativeLayout.BELOW, tv.getId());
            relativeParams.topMargin=topval+100;
            layout.addView(tv, relativeParams);
        }       
       
        setContentView(layout);
    }
   

}