Simple addition and subtraction device

package com.example.shoppingcart.view.activity;

import android.content.Context;
import android.util.AttributeSet;
import android.view.View;
import android.widget.LinearLayout;
import android.widget.TextView;
import android.widget.Toast;

import com.example.shoppingcart.R;

public class AddAndRemove extends LinearLayout implements View.OnClickListener {

    private View view;
    private TextView subtractor;
    private TextView number;
    private TextView add;
    private int count = 1;

    public AddAndRemove(Context context) {
        super(context);
    }

    public AddAndRemove(Context context, AttributeSet attrs) {
        super(context, attrs);
        view = View.inflate(context, R.layout.addandremove, this);
        initView();
    }

    private void initView() {
        subtractor = (TextView) view.findViewById(R.id.subtractor);
        number = (TextView) view.findViewById(R.id.number);
        add = (TextView) view.findViewById(R.id.add);

        subtractor.setOnClickListener(this);
        add.setOnClickListener(this);
    }

    @Override
    public void onClick(View v) {
        switch (v.getId()) {
            case R.id.subtractor:
                if (count>1){
                    count--;
                    number.setText(count+"");

　　　　　　　　　　// After clicking change, with callback interfaces pass values

                    IF (onNumberChangeListener = null!) { 
                        onNumberChangeListener.changed (COUNT); 
                    } 
                } the else { 
                    Toast.makeText (the getContext (), "can not be less of it", Toast.LENGTH_SHORT) the .Show (); 
                } 
                BREAK; 
            Case R. id.add: 

                COUNT ++; 
                number.setText (COUNT + ""); 
　　　　　　　　　　after clicking // change the callback interfaces with traditional values 
                IF (onNumberChangeListener = null!) { 
                    onNumberChangeListener.changed (COUNT); 
                } 

                BREAK; 
        } 
    } 

    public interface onNumberChangeListener {
        void changed(int num);
    }

    OnNumberChangeListener onNumberChangeListener;

    public void setOnNumberChangeListener(OnNumberChangeListener onNumberChangeListener){
        this.onNumberChangeListener = onNumberChangeListener;
    }

    public int getNumber(){
        return count;
    }

    public void setCount(int num){
        count = num;
        number.setText(count+"");
    }

}