Draw clickable rectangles and I do not know how set params before onDraw method

I am trying to make clickable rectangles. I've looked around and I created quite good code :)

I create constructor of my own rectangle class, then i set some values of it.
However, onDraw method looks like creates and draw rectangle but without constructor's new variables' values.
What do I do wrong?

This is default MyActivity class:

ll = (LinearLayout)findViewById(R.id.linearlayout);
 List<MiniRectangle> miniRectangleList = new ArrayList<MiniRectangle>();
 
 for(int i=0;i<8;i++)
 {
     int numberRandom = r.nextInt(3);
 
     MiniRectangle miniRectangle = new MiniRectangle(this);
     miniRectangle.set_color(colors.get(numberRandom));
     miniRectangle.set_size(50);
     miniRectangle.set_id_color(numberRandom);
     miniRectangle.set_number(i);
 
     ll.addView(miniRectangle);
 
     miniRectangleList.add(miniRectangle);
 }
 
 setContentView(ll);
 

This is my own rectangle class

public class MiniRectangle extends View implements View.OnClickListener {
 
     Context context;
     int _size;
     int _color;
     int _id_color;
     int _number;
 
     public MiniRectangle(Context context) {
         super(context);
         this.context = context;
         setOnClickListener(this);
     }
 
     @Override
     public void onClick(View view) {
         System.out.println(get_number());
         Toast.makeText(context, get_number(), Toast.LENGTH_SHORT).show();
     }
 
     @Override
     protected void onDraw(Canvas canvas) {
         super.onDraw(canvas);
 
         Paint paint = new Paint();
         paint.setColor(get_color());
         paint.setStrokeWidth(1);
 
         int kleft = (get_number() % 8) * get_size();
         int kright = kleft + get_size() - 2;
 
         int ktop = 1 * get_size();
         int kbottom = ktop + get_size() - 2;
 
         canvas.drawRect(kleft, ktop, kright, kbottom, paint);
     }
 }
 

I can say that after run project I get only one rectangle. No wonder if every rectangle has the same position. Please Help.

---