public class CameraView extends View implements SensorEventListener{ ..... .....  @Override     protected void onDraw(Canvas canvas) {                   mCanvas = canvas;              //update GameTimer and Items         hud.updateGameTimer();          //draw level based on camera coordinates         canvas.drawBitmap(background, camX, camY, null);          //Draw the HUD         hud.draw(canvas);            // and make sure to redraw asap         invalidate();     } }

public class Hud{     public TextElement gameTimer;     CameraView mCameraView;     private HashMap<Integer, Item> mItems = new HashMap<Integer, Item>();     private Integer mScreenWidth;     private Integer mScreenHeight;     //private ImageView imgView; private HashMap<Integer, ImageView> imgViews = new HashMap<Integer, ImageView>();     private LinearLayout ll;     private Integer n;      public Hud(CameraView cameraView){         mCameraView = cameraView;          mScreenWidth = mCameraView.screenWidth;         mScreenHeight = mCameraView.screenHeight;          //Get an instance of the GameTimer         gameTimer = new TextElement("GameTimer", mScreenWidth/2, 25);          //imgView = new ImageView(mCameraView.getContext()); //We use a layout to contain the buttons (or any view)         ll = new LinearLayout(mCameraView.getContext());         ll.setOrientation(LinearLayout.HORIZONTAL);     }      public void updateGameTimer() {          //update GameTimer long millis = System.currentTimeMillis() - mCameraView.startTime  ;         int seconds = (int) (millis / 1000);         int minutes = seconds / 60;         seconds     = seconds % 60;         gameTimer.setText(String.format("%d: %02d", minutes, seconds));      }      public void updateItems() {         mItems = Simulation.items;          ll = new LinearLayout(mCameraView.getContext());                  for (Item item : mItems.values()) {                          Integer id = item.getIdentifier();             ImageView imgView = new ImageView(mCameraView.getContext());             imgView.setImageBitmap(item.getImage());             imgView.setId(id);              //We set the layout parameters             LinearLayout.LayoutParams layoutParams = new LinearLayout.LayoutParams(                     LinearLayout.LayoutParams.WRAP_CONTENT, LinearLayout.LayoutParams.WRAP_CONTENT);              //SET THE MARGIN HERE             layoutParams.setMargins(30 , mScreenHeight - item.getImage().getHeight() - 20, 0, 0);             ImageView.OnClickListener listener = new ImageView.OnClickListener()              {                  public void onClick(View v)                 {                     Simulation.items.get(v.getId()).useItem();                     Simulation.items.remove(v.getId());                     imgViews.remove(v.getId());                     updateItems();                                       }             };                                  imgView.setOnClickListener(listener);                          //Add it to our linear layout             ll.addView(imgView, layoutParams);              //Measure and layout the linear layout before drawing it             ll.measure(MeasureSpec.getSize(ll.getMeasuredWidth()), MeasureSpec.getSize(ll.getMeasuredHeight()));             ll.layout(0, 0, MeasureSpec.getSize(imgView.getMeasuredWidth()), MeasureSpec.getSize(imgView.getMeasuredHeight()));              imgViews.put(item.getIdentifier(), imgView);                      }      }      public void draw(Canvas canvas) {         //GameTimer         gameTimer.Draw(canvas);                           //Finally draw the linear layout on the canvas            ll.draw(canvas);         if (imgViews.containsKey(1)) {                          //imgViews.get(1).performClick();         }              }  }