@Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);
        LinearLayout linearLayout = new LinearLayout(this);
        linearLayout.setOrientation(LinearLayout.VERTICAL);


       ScrollView scrollView = new ScrollView(this);
        linearLayout.setVerticalScrollBarEnabled(true);

        linearLayout.addView(scrollView);

        for(int i = 1; i < 10; i++){

            Button button = new Button(this);

            button.setText(" Button Programmatically ");
            button.setTextSize(20);
            button.setGravity(Gravity.CENTER);

            linearLayout.addView(button);

            LinearLayout.LayoutParams layoutParams = new LinearLayout.LayoutParams(
                    LinearLayout.LayoutParams.MATCH_PARENT, LinearLayout.LayoutParams.WRAP_CONTENT);

            LinearLayout.LayoutParams lp = (LinearLayout.LayoutParams) button.getLayoutParams();
            if(i == 1)
                 lp.setMargins(30,40,30,80);
            else
                lp.setMargins(30,0,30,80);

            button.setLayoutParams(lp);
        //layoutParams.setMargins(30, 0, 30, 50);
            button.setBackgroundResource(R.drawable.btn);


            this.setContentView(linearLayout, layoutParams);
            //Button button = new Button(this);




            //LinearLayout.LayoutParams.setMargins(30, 20, 30, 0);
            //LinearLayout.setMargins(50, 10, 0, 0)
            //button.setBackgroundResource(R.drawable.btn);

            /*LinearLayout.LayoutParams lparams = new LinearLayout.LayoutParams(200, 100);
            button.setLayoutParams(lparams);
            button.setTag(0);
            button.setBackgroundResource(R.drawable.btn);
            buttonArray[i] = button;
            layout.addView(button);*/
        }
    }