Ses propres ecouteur android

package com.example.repondeur;  
 

import android.content.Context;  
import android.graphics.Color;  
import android.util.AttributeSet;  
import android.view.Gravity;  
import android.view.View;  
import android.widget.Button;  
import android.widget.LinearLayout;  
import android.widget.TextView;  


public class Wheel extends LinearLayout {  
   
   
    Button up, down;  
 int max, min;  
 int wrap = LayoutParams.WRAP_CONTENT;  
 int fill = LayoutParams.FILL_PARENT;  
 TextView num;  
   
   
 public Wheel(Context context) {  
  super(context);  
  max = 10;  
  min = 1;  
  setOrientation(LinearLayout.VERTICAL);  
  setLayoutParams(new LayoutParams(wrap, wrap));  
  init();  
 }  

 public Wheel(Context context, AttributeSet attrs) {  
  super(context, attrs);  
  max = 10;  
  min = 1;  
  init();  
 }  
   
 //private void init(AttributeSet attrs) {}  

 public Wheel(Context context, int tmp, int tmp2) {  
  super(context);  
  max = tmp;  
  min = tmp2;  
  setOrientation(LinearLayout.VERTICAL);  
  setLayoutParams(new LayoutParams(wrap, wrap));  
  init();  
 }  

 private void init() {  
    
  Context ctx = this.getContext();  
  up = new Button(ctx);  
  down = new Button(ctx);  
  num = new TextView(ctx);  
    
  up.setText("+");  
  down.setText("-");  
  num.setText(Integer.toString(min));  
  num.setGravity(Gravity.CENTER);  
  num.setTextColor(Color.WHITE);  
  up.setOnClickListener(new OnClickListener() {  
     
   @Override  
   public void onClick(View v) {  
    int tmp = Integer.valueOf((String) num.getText()) + 1 ;  
    if (tmp > max){  
     tmp = min;  
    }  
    String chtmp = Integer.toString(tmp);  
    num.setText(chtmp);  
    //fireModifier(new ModifierEvent(Wheel.this, true));  
   }  
  });  
    
  down.setOnClickListener(new OnClickListener() {  
     
   @Override  
   public void onClick(View v) {  
    int tmp = Integer.valueOf((String) num.getText()) - 1 ;  
    if (tmp < min){  
     tmp = max;  
    }  
    String chtmp = Integer.toString(tmp);  
    num.setText(chtmp);  
    //fireModifier(new ModifierEvent(Wheel.this, false));  
   }  
  });  
    
    
  addView(up, new LinearLayout.LayoutParams(fill, wrap));  
  addView(num, new LinearLayout.LayoutParams(fill, wrap));  
  addView(down, new LinearLayout.LayoutParams(fill, wrap));  
    
 }  
   
 public int getNum(){  
  return Integer.valueOf(num.getText().toString());  
 }  
   
 public String getNumOnString(){  
  return num.getText().toString();  
 }  
   
 public void setMaxMin(int ma, int mi){  
  max = ma;  
  min = mi;  
 }  
   
}