public class One extends View{

  private static final float RADIUS = 30;
  private Paint backgroundPaint;
  private Paint myPaint1;
  private Paint myPaint2;
  private Paint myPaint7;
  private Paint myPaint8;
  private Paint myPaint9;
 
  public One(Context context, AttributeSet attrs){
  super(context, attrs);
 
  backgroundPaint = new Paint();
  backgroundPaint.setColor(Color.YELLOW);
  
  myPaint1 = new Paint();
  myPaint2 = new Paint();
 
  myPaint7 = new Paint();
  myPaint8 = new Paint();
  myPaint9 = new Paint();

 
  myPaint1.setColor(Color.BLUE);
  myPaint2.setColor(Color.BLUE);
 
  myPaint7.setColor(Color.BLUE);
  myPaint8.setColor(Color.BLUE);
  myPaint9.setColor(Color.BLUE);
  }

 @Override
 public boolean onTouchEvent(MotionEvent event){
  int action = event.getAction();
  switch(action){
 
  case MotionEvent.ACTION_DOWN:  
  case MotionEvent.ACTION_MOVE:

  final float a = event.getX();
  final float b = event.getY();
 
  if(Math.sqrt(Math.pow(a - 160, 2) + Math.pow(b - 100, 2)) <= RADIUS){
   myPaint1.setColor(Color.RED);
  }
  else if(Math.sqrt(Math.pow(a - 160, 2) + Math.pow(b - 140, 2)) <= RADIUS){
   myPaint2.setColor(Color.RED);
  } 

 if(Math.sqrt(Math.pow(a - 100, 2) + Math.pow(b - 140, 2)) <= RADIUS){
   myPaint7.setColor(Color.RED);
  }
  else if(Math.sqrt(Math.pow(a - 120, 2) + Math.pow(b - 160, 2)) <= RADIUS){
   myPaint8.setColor(Color.RED);
  }
  else if(Math.sqrt(Math.pow(a - 140, 2) + Math.pow(b - 180, 2)) <= RADIUS){
   myPaint9.setColor(Color.RED);
  } 

  return true;
 
  case MotionEvent.ACTION_UP:
  case MotionEvent.ACTION_CANCEL:
 
   break;
  }
  return(true);
 }


 

                                                                                     


 @Override
 public void onDraw(Canvas canvas){
  int width = canvas.getWidth();
  int height = canvas.getHeight();

  switch(){ 
  Case Eng.A
  canvas.drawRect(0, 0, width, height, backgroundPaint);
 
  int[] start1 ={160,160};
  int[] end1 = {100,120};
  Paint[] paint1 = {backgroundPaint, myPaint1, myPaint2};
  
  for (int i=0; i<start1.length; i++) {
   canvas.drawCircle(start1[i],end1[i],RADIUS,paint1[i]);
  }
  break;
 
 
   Case Eng.B
  canvas.drawRect(0, 0, width, height, backgroundPaint); 

  int[] start2 = {100,120,140,};
  int[] end2 = {140,160,180};
  Paint[] paint2 = {backgroundPaint, myPaint7, myPaint8, myPaint9};
 
  for (int a=0; a<start2.length; a++) {
  canvas.drawCircle(start2[i],end2[i],RADIUS,paint2[i]);
  }
  break;
 }
  invalidate();
 }
   }
}

 

switch문을 써서 첫번째 케이스 나오고 터치 하면 두번째 케이스 나오고(첫번째케이스는 사라지구요) 하고 싶은데, switch문 주는거랑 터치이벤트를 어떻게 줘야할지 잘 모르겠어요ㅜㅜ

어떻게 써야 좋을지 코드면 댓글로 남겨주시면 열심히 배우겠습니다~

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