<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
    xmlns:tools="http://schemas.android.com/tools"
    android:id="@+id/mainLayout"
    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="com.android.myApp.MainActivity" >

</RelativeLayout>

mLayout = (RelativeLayout) findViewById(R.id.mainLayout);
    RelativeLayout.LayoutParams lprams = new RelativeLayout.LayoutParams(RelativeLayout.LayoutParams.WRAP_CONTENT,
                                                                         RelativeLayout.LayoutParams.WRAP_CONTENT);

    Button btnTag = new Button(this);
    btnTag.setText("Button0");
    btnTag.setId(0);
    btnTag.setOnClickListener(mGlobalOnCLickListener);
    mLayout.addView(btnTag, lprams);
    lprams.addRule(RelativeLayout.BELOW, 0);

    btnTag = new Button(this);
    btnTag.setText("Button2");
    btnTag.setId(1);
    btnTag.setOnClickListener(mGlobalOnCLickListener);
    mLayout.addView(btnTag, lprams);