How to make a Button randomly Move in a Layout

Ok so in here i have this xml like this

<?xml version="1.0" encoding="utf-8"?>
<RelativeLayout xmlns:android="http://ift.tt/nIICcg"
    xmlns:ads="http://ift.tt/GEGVYd"
    android:orientation="vertical"
    android:layout_width="match_parent"
    android:layout_height="match_parent" >

     <RelativeLayout
         android:layout_width="wrap_content"
         android:layout_height="wrap_content"
         android:layout_centerHorizontal="true"
         android:layout_centerVertical="true"
         android:layout_margin="30dp"
         android:background="@drawable/backgroundblankred" >

         <Button
             android:id="@+id/button1"
             android:layout_width="100dp"
             android:layout_height="100dp"
             android:background="@drawable/eeclevelfirstblackbuton" />

     </RelativeLayout>

</RelativeLayout>

it is show like this

the button was inside a layout so i want to make the button when clicked it will be like this

the button randomly move inside the layout there and not out from the layout that can make app force close

Second question, how to set the fast of random button move? like set the buton random move every 2 second and increase it more fast, it is possible set the button move faster?

i just have this code now

public class tested extends Activity {

Button buttonblack;
int score=0;



@Override
protected void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    this.requestWindowFeature(Window.FEATURE_NO_TITLE);
    getWindow().setFlags(WindowManager.LayoutParams.FLAG_FULLSCREEN,
    WindowManager.LayoutParams.FLAG_FULLSCREEN);
    setContentView(R.layout.tested);


    buttonblack = (Button)findViewById(R.id.black1);
    buttonblack.setOnClickListener(new View.OnClickListener() {

              public void onClick(View v){
             //If clicked, Move the button randomly
                                         }                
            });

Anyone can help with some code? Thanks in Advance.