How to add element below another in relative layout in android

To set an element like TextView below another TextView in RelativeLayout in android app is easy to do with layout xml. You can do it like this.

<TextView
	android:id="@+id/heading"
	android:layout_width="wrap_content"
        android:layout_height="wrap_content"
	android:text="@string/activity_action_title"
	android:textAppearance="?android:attr/textAppearanceLarge"/>
<TextView
        android:id="@+id/welcome"
	android:layout_width="wrap_content"
	android:layout_height="wrap_content"
	android:layout_below="@+id/heading"
	android:layout_marginTop="10dp"
	android:textAppearance="?android:attr/textAppearanceMedium"/>

in the above code welcome TextView will come after heading.

Now we will do it programatically.

TextView ResultText = new TextView(Activity.this);
ResultText.setText("Your Custom text.");
RelativeLayout.LayoutParams p = new RelativeLayout.LayoutParams(LayoutParams.MATCH_PARENT,LayoutParams.WRAP_CONTENT);
p.addRule(RelativeLayout.BELOW, R.id.heading);
ResultText.setLayoutParams(p);                    
View relativeLayout = findViewById(R.id.Header);
((RelativeLayout) relativeLayout).addView(ResultText);