How to set OnTouchListener for the entire screen?

Please have a look at the following code. I am only posting the important sections of the code. activity_game.xml ``` <RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android" xmlns:tools="http://schemas.android.com/tools" android:id="@+id/fullView" 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=".Game" > <TextView android:id="@+id/numberOfQuestionsLeft" android:layout_width="wrap_content" android:layout_height="wrap_content" android:layout_alignParentLeft="true" android:layout_alignParentTop="true" android:layout_marginLeft="20dp" android:text="TextView" /> </RelativeLayout> ``` Game.java ``` public class Game extends Activity { private View fullView; @Override protected void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); setContentView(R.layout.activity_game); fullView = (View)findViewById(R.id.fullView); fullView.setOnTouchListener(imageViewSwiped); } OnTouchListener imageViewSwiped = new OnSwipeTouchListener() { public boolean onSwipeRight() { //code removed } public boolean onSwipeLeft() { //code removed return true; } public boolean onSwipeBottom() { //code removed return true; } }; } ``` OnSwipTouchListener.java Note - I do not own this class of the code. It is written by another SO member. ``` package game.Game; import android.view.GestureDetector; import android.view.GestureDetector.SimpleOnGestureListener; import android.view.MotionEvent; import android.view.View; import android.view.View.OnTouchListener; public class OnSwipeTouchListener implements OnTouchListener { private final GestureDetector gestureDetector = new GestureDetector(new GestureListener()); public boolean onTouch(final View v, final MotionEvent event) { return gestureDetector.onTouchEvent(event); } private final class GestureListener extends SimpleOnGestureListener { private static final int SWIPE_THRESHOLD = 100; private static final int SWIPE_VELOCITY_THRESHOLD = 100; @Override public boolean onDown(MotionEvent e) { return super.onDown(e); } @Override public boolean onFling(MotionEvent e1, MotionEvent e2, float velocityX, float velocityY) { boolean result = false; try { float diffY = e2.getY() - e1.getY(); float diffX = e2.getX() - e1.getX(); if (Math.abs(diffX) > Math.abs(diffY)) { if (Math.abs(diffX) > SWIPE_THRESHOLD && Math.abs(velocityX) > SWIPE_VELOCITY_THRESHOLD) { if (diffX > 0) { result = onSwipeRight(); } else { result = onSwipeLeft(); } } } else { if (Math.abs(diffY) > SWIPE_THRESHOLD && Math.abs(velocityY) > SWIPE_VELOCITY_THRESHOLD) { if (diffY > 0) { result = onSwipeBottom(); } else { result = onSwipeTop(); } } } } catch (Exception exception) { exception.printStackTrace(); } return result; } } public boolean onSwipeRight() { return false; } public boolean onSwipeLeft() { return false; } public boolean onSwipeTop() { return false; } public boolean onSwipeBottom() { return false; } } ``` Now, I am trying to make the make the WHOLE ACTIVITY touched enabled. Please view `Game.java` to see how I did it. But the problem is, it is not reacting to any kind of touch event! There is nothing wrong with the code `OnSwipTouchListener.java` because I have used the touch events of this by setting the listener to an `image view`. There must be a problem where I am trying to make the whole activity touch enabled. By saying "Whole Activity Touch Enabled" what I mean is, I need to swipe across the whole screen instead of adding the listener to an `imageview`. What have I done wrong here?