Start new activity in window manager

I want to start a new activity, the activity plays a live stream from a source. When I start the activity, it plays the content on the whole screen. I want to display the contents of the stream in a small screen which is a surfaceview. I am doing this by using a handler which runs a runnable and so on. This is how I am doing it:

//new activity played from here
 Intent localIntent3 = new Intent("android.intent.action.MAIN");
//intent flag set to start a new task over the previous one
 localIntent3.setFlags(270532608);
 startActivity(localIntent3);

Once this activity is started, I run the runnable on the respective handler, which renders the contents played on the stream on a surface view. Here is how I do this:

Runnable handlerRuntv = new Runnable() {
        public void run() {
            try {
                MainActivity.this.surfaceView = new SurfaceView(
                        MainActivity.this.getApplicationContext());
                MainActivity.this.openSurfaceView();

                //method to scale the surface view to a smaller display
                MainActivity.this.setPipscale();

            } catch (Exception localException) {
                localException.printStackTrace();
            }
        }
    };

This is how I run it on the handler:

      this.handlerTV.postDelayed(handlerRuntv, 300L);

Once the runnable starts to run on the handler, I do a back press on the device to take me to the previous activity where the content is already playing.

Question: I want to start the activity directly on the scaled display of the surface i.e. I do not want the user to press the back button to see the stream. How should this be done?

**EDIT:**

Using fragments to start activity in a fragment:

//In mainactivity.java
llFragment =(LinearLayout) findViewById(R.id.llfragment);
FragmentTransaction t = getFragmentManager().beginTransaction();
RunTVFragment fragment = new RunFragment();
t.add(llFragment.getId(), fragment, "fragment");
t.commit();

//llfragment in .xml
<LinearLayout
    android:id="@+id/llfragment"
    android:orientation="horizontal"
    android:layout_width="wrap_content"
    android:layout_height="wrap_content" >
</LinearLayout>

RunFragment.java that would start the activity:

@Override
public View onCreateView(LayoutInflater inflater, ViewGroup container,
        Bundle savedInstanceState) {
    // TODO Auto-generated method stub
        View v = inflater.inflate(R.layout.fragmentlayout, container, false);
        return v;
}

@Override
public void onActivityCreated(Bundle savedInstanceState) {
    // TODO Auto-generated method stub
    super.onActivityCreated(savedInstanceState);
      Intent localIntent3 = new Intent("android.intent.action.MAIN");
      localIntent3.addCategory("android.intent.category.LAUNCHER");
      startActivity(localIntent3);
      this.handlerTV.postDelayed(handlerRuntv, 300L);
}

//fragmentlayout.xml
<?xml version="1.0" encoding="utf-8"?>
<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    android:background="@drawable/back"
    android:orientation="horizontal" >

  <FrameLayout
            android:id="@+id/surframelayout"
            android:layout_width="340dp"
            android:layout_height="280dp"
            android:layout_alignParentRight="true"
            android:layout_below="@+id/textView1"/>

</RelativeLayout>

Still, the activity does not start/display in the region of the screen required. Instead, it is started as a new task, over the previous activity..

EDIT II:

Definition of NONUIFragment:

@Override
    public void onActivityCreated(Bundle savedInstanceState) {
        // TODO Auto-generated method stub
        super.onActivityCreated(savedInstanceState);
        ComponentName localComponentName2 = new ComponentName("mstar.tvsetting.ui", "mstar.tvsetting.ui.RootActivity");
          Intent localIntent3 = new Intent("android.intent.action.MAIN");
          localIntent3.addCategory("android.intent.category.LAUNCHER");
          localIntent3.setComponent(localComponentName2);
          localIntent3.setFlags(270532608);
          startActivity(localIntent3);
          this.handlerTV.postDelayed(handlerRuntv, 1000L);
    }

Calling NONUI-Fragment from the UI-Fragment:

@Override
    public void onActivityCreated(Bundle savedInstanceState) {
        // TODO Auto-generated method stub
        super.onActivityCreated(savedInstanceState);

         FragmentManager fm = getFragmentManager();

         // Check to see if we have retained the worker fragment.
         NonUITVFragment mWorkFragment = (NonUITVFragment)fm.findFragmentByTag("work");

         // If not retained (or first time running), we need to create it.
         if (mWorkFragment == null) {
             mWorkFragment = new NonUITVFragment();   //create instance of NON UI Fragment
             // Tell it who it is working with.
             mWorkFragment.setTargetFragment(this, 0);
             fm.beginTransaction().add(mWorkFragment, "work").commit();  //NON UI Fragment
         }
    }

Calling UI-Fragment from my main activity:

if (savedInstanceState == null) {    //UI Fragement
                getFragmentManager().beginTransaction().add(R.id.llfragment, new RunTVFragment()).commit();
            }

I doubt whether i understood your question properly.Maybe you can try using a fragment without UI to initiate the thread instead of the activity.