레이아웃에 뷰를 두개를 추가했는데요
뷰를 처음에 추가하고 두번째 추가하면 앞에 추가한건 안보이게되나요?
뷰를 확장해서 커스텀뷰를 만들어서 2개를 뿌려줄려고 하는데 잘안되네요
조언 부탁드립니다.
========================================ChartView .java (메인)

public class ChartView extends Activity {
    /** Called when the activity is first created. */
    @Override
    public void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.main);
        LinearLayout back = (LinearLayout)findViewById(R.id.back);
        back.setBackgroundColor(Color.WHITE);
        Chart chart = new Chart(this);
        chart.setPointXYSTR(100,100,"75");
        chart.setUpdown(true);
        Chart chart2 = new Chart(this);
        chart2.setPointXYSTR(200,100,"12");
        chart2.setUpdown(true);
        back.addView(chart);
        back.addView(chart2);
    }
}


========================================Chart.java
public class Chart extends View{
 
 Paint paint;
 private int pointX;
 private int pointY;
 private int isUpdown;
 private int isUpdownStr;
 private String str;
 
 public void setPointX(int X) {
  pointX=X;
 }
 public void setPointY(int Y) {
  pointY=Y;
 }
 public void setStr(String value) {
  str=value;
 }
 public int getPointX() {
  return pointX;
 }
 public int getPointY() {
  return pointY;
 }
 public void setPointXY(int X,int Y) {
  pointX=X;
  pointY=Y;
 }
 public void setPointXYSTR(int X,int Y,String value) {
  pointX=X;
  pointY=Y;
  str=value;
 }
 public void setUpdown(boolean bool) {//말풍선이 위쪽인지 아래인지 셋팅
  if(bool == true){
  isUpdown = pointY - 80;
  isUpdownStr = pointY - 35;
  }else{
  isUpdown = pointY + 10;
  isUpdownStr = pointY + 10;
  }
 }
 
 public Chart(Context conf)
 {
  super(conf);
 }
 
 protected void onDraw(Canvas canvas)
 {
  //페인트 셋팅
  paint = new Paint(Paint.ANTI_ALIAS_FLAG);
  paint.setColor(Color.BLACK);
  paint.setStrokeWidth(6f);
  
  //켄바스 배경색칠
  //canvas.drawColor(Color.WHITE);
  
  //점 동그라미 그리기
  //canvas.drawPoint(pointX,pointY,paint);
  canvas.drawCircle(pointX, pointY,5, paint);
  
  //말풍선 샛팅
  Resources r = getResources();
  BitmapDrawable bd = (BitmapDrawable)r.getDrawable(R.drawable.b);
  Bitmap bit = bd.getBitmap();
  
  //말풍선 그리기
  canvas.drawBitmap(bit, pointX-35,isUpdown, paint);
  
  paint.setTextSize(30);
  canvas.drawText(str, pointX-15, isUpdownStr , paint);
  
  
  /*
  for(i=X;i<Xplus;i+=5){
  canvas.drawPoint(i,Y,paint);
  }
  for(i=X;i<Xplus;i+=5){
   canvas.drawPoint(i,Yplus,paint);
  }
  for(i=Y;i<Yplus;i+=5){
   canvas.drawPoint(X,i,paint);
  }
  for(i=Y;i<Yplus;i+=5){
   canvas.drawPoint(Xplus,i,paint);
  }
  */

 }
}