hata göremedim onlarda sorun şu hesapla butonuna click view özelliği veremedim gösterdiğim kodda.
sadece formül var butona tıklayınca hesaplayamıyor bu şekilde.


Dosyalar şöyle:

package com.hesapla;

import android.app.Activity;
import android.os.Bundle;
import android.view.View;
import android.widget.Button;
import android.widget.EditText;
import android.widget.ImageButton;
import android.widget.RadioButton;
import android.widget.RadioGroup;
import android.widget.RadioGroup.OnCheckedChangeListener;
import android.widget.TextView;

public class Bki extends Activity {
	
	RadioButton radioButtonA;
	RadioButton radioButtonB;
	
	@Override
    public void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.bki);
        
        
    
		Button topla = (Button)findViewById(R.id.Button1);
        radioButtonA = (RadioButton)findViewById(R.id.radioButtonA);
        radioButtonB = (RadioButton)findViewById(R.id.radioButtonB); 
        
    	final EditText sayi4=(EditText)findViewById(R.id.number4);
		final TextView sonuc=(TextView)findViewById(R.id.result);
		
		final RadioGroup radioGroup1 = (RadioGroup)findViewById(R.id.radioGroup1);
        
        
        
        radioGroup1.setOnCheckedChangeListener(new OnCheckedChangeListener() {
         
         public void onCheckedChanged(RadioGroup radioGroup1, int checkedId) {
        	 
        	 
      
        	 if(radioButtonA.isChecked())
        	 {
        		 float sayi4float=Float.parseFloat(sayi4.getText().toString());	
                 sonuc.setText(String.valueOf((sayi4float * 1)));
        	 }
        	 else {
        		 float sayi4float=Float.parseFloat(sayi4.getText().toString());	
                 sonuc.setText(String.valueOf((sayi4float * 2)));
        	 }
        	 
        	 
        	   }
        
         
         
         
         
         
         
        	  });
        	 }
         }

layout:

<?xml version="1.0" encoding="utf-8"?>
<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    android:orientation="vertical" >

    <RadioGroup
        android:id="@+id/radioGroup1"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_above="@+id/imageButton1"
        android:layout_alignParentLeft="true" >

        <RadioButton
            android:id="@+id/radioButtonA"
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"
            android:layout_marginTop="36dp"
            android:text="RadioButton" />

        <RadioButton
            android:id="@+id/radioButtonB"
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"
            android:layout_marginTop="25dp"
            android:text="RadioButton" />
    </RadioGroup>

    <Button
        android:id="@+id/Button1"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_centerHorizontal="true"
        android:layout_centerVertical="true"
        android:src="@drawable/hesapla"
        android:text="hesapla" />

    <TextView
        android:id="@+id/result"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_alignRight="@+id/radioGroup1"
        android:layout_below="@+id/Button1"
        android:layout_marginRight="24dp"
        android:layout_marginTop="51dp"
        android:text="TextView" />

    <EditText
        android:id="@+id/number4"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_below="@+id/radioGroup1"
        android:layout_centerHorizontal="true"
        android:ems="10"
        android:inputType="numberDecimal" >

        <requestFocus />
    </EditText>

</RelativeLayout>