Java radiobutton和旁边的edittext一起用于计算器

我想写一个类来计算密度，你可以选择密度，质量或者体积。我设置为，如果您选择上述任何值相关的edittext Get setEnabled false，当按下“计算”按钮时，在同一edittext中设置文本，但它不起作用，请帮助

这是我的java类： 包装ir.kiandroid.chemcalculator3

import android.app.Activity;
import android.content.Intent;
import android.os.Bundle;
import android.view.Menu;
import android.view.MenuItem;
import android.view.View;
import android.view.View.OnClickListener;
import android.widget.Button;
import android.widget.EditText;
import android.widget.RadioButton;
import android.widget.RadioGroup;
import android.widget.TextView;
import android.widget.Toast;
import android.widget.RadioGroup.OnCheckedChangeListener;

public class Chegali extends Activity {

    private static final int MENU_ITEM1 = 0;
    private static final int MENU_ITEM2 = 1;
    private static final int MENU_ITEM3 = 2;

    // step1 : create all the variables.
    EditText roe, me, ve;
    TextView sub;
      Button b1, b2;
// String phEvar;
    RadioButton ro, m, vr;

    @Override
    protected void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    setContentView(R.layout.chegali);

    // step2 : get all the views from xml file.
    roe = (EditText) findViewById(R.id.e1);
    me = (EditText) findViewById(R.id.e2);
    ve = (EditText) findViewById(R.id.e3);

    ro = (RadioButton) findViewById(R.id.one);
    m = (RadioButton) findViewById(R.id.two);
    vr = (RadioButton) findViewById(R.id.three);

    sub = (TextView) findViewById(R.id.subject);

    b1 = (Button) findViewById(R.id.button1);
    b2 = (Button) findViewById(R.id.button2);

    // /////////
    sub.setText("محاسبه چگالی، ابتدا مجهول را انتخاب کنید سپس متغییر ها را وارد کنید.");
    // ////////
    RadioGroup radioGroup = (RadioGroup) findViewById(R.id.rg);
    radioGroup.setOnCheckedChangeListener(new OnCheckedChangeListener() {
        public void onCheckedChanged(RadioGroup group, int checkedId) {

            if (ro.isChecked() == true) {

                roe.setText("X=? gr/ml");
                me.setText("");
                ve.setText("");
                roe.setEnabled(false);
                me.setEnabled(true);
                ve.setEnabled(true);
            } else if (m.isChecked() == true) {

                roe.setText("");
                me.setText("X=? gr");
                ve.setText("");
                me.setEnabled(false);
                roe.setEnabled(true);
                ve.setEnabled(true);
            } else if (vr.isChecked() == true) {
                roe.setText("");
                me.setText("");
                ve.setText("X=? ml");
                ve.setEnabled(false);
                roe.setEnabled(true);
                me.setEnabled(true);
            }

        }
    });

    // step3 : write add functionality.
    b1.setOnClickListener(new OnClickListener() {
        @Override
        public void onClick(View v) {
            try {
                String roVar = roe.getText().toString();
                double roDou = Double.parseDouble(roVar);

                String vVar = ve.getText().toString();
                double vDou = Double.parseDouble(vVar);

                String mVar = me.getText().toString();
                double mDou = Double.parseDouble(mVar);

                if (ro.isChecked() == true) {

                    double result = mDou / vDou;
                    result = result * 100;
                    result = (double) ((int) result);
                    result = result / 100;
                    String rec = String.valueOf(result);
                    roe.setText("X=" + rec + "gr/ml");

                } else if (m.isChecked() == true) {
                    double result = roDou * vDou;
                    result = result * 100;
                    result = (double) ((int) result);
                    result = result / 100;
                    String rec = String.valueOf(result);
                    me.setText("X=" + rec + "gr");

                } else if (vr.isChecked() == true) {
                    double result = mDou / roDou;
                    result = result * 100;
                    result = (double) ((int) result);
                    result = result / 100;
                    String rec = String.valueOf(result);
                    ve.setText("X=" + rec + "ml");

                } else {
                    Toast.makeText(Chegali.this, "مجهول را انتخاب کنید.",
                            Toast.LENGTH_SHORT).show();
                }

            } catch (Exception e) {
                Toast.makeText(Chegali.this, "همه بخش ها را پر کنید.",
                        Toast.LENGTH_SHORT).show();
            }
        }
    });
    /*
     * 
     * 
     * b2.setOnClickListener(new OnClickListener() {
     * 
     * @Override public void onClick(View v) { String f =
     * ph.getText().toString(); int i = Integer.parseInt(f); String s =
     * volum.getText().toString(); int j = Integer.parseInt(s);
     * 
     * Integer result = i-j; String res = result.toString();
     * et3.setText(res); } });
     */

 }

 @Override
 public boolean onCreateOptionsMenu(Menu menu) {
    // TODO Auto-generated method stub

    menu.add(Menu.NONE, MENU_ITEM1, Menu.NONE, "کیان دروید").setIcon(
            R.drawable.kian);
    menu.add(Menu.NONE, MENU_ITEM2, Menu.NONE, "درباره اپ").setIcon(
            R.drawable.about);
    menu.add(Menu.NONE, MENU_ITEM3, Menu.NONE, "فیسبوک").setIcon(
            R.drawable.facebook);
    return super.onCreateOptionsMenu(menu);

}

@Override
public boolean onOptionsItemSelected(MenuItem item) {
    // TODO Auto-generated method stub
    switch (item.getItemId()) {
    case MENU_ITEM1:
        Toast.makeText(getApplicationContext(), "کیان دروید",
                Toast.LENGTH_LONG).show();
        break;
    case MENU_ITEM2:
        startActivity(new Intent(Chegali.this, About.class));
        Toast.makeText(getApplicationContext(), "درباره این برنامه",
                Toast.LENGTH_LONG).show();
    case MENU_ITEM3:
        Toast.makeText(getApplicationContext(), "فیس بوک",
                Toast.LENGTH_LONG).show();

    }
    return super.onOptionsItemSelected(item);
 }

 }

和xml文件：

<ScrollView xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:tools="http://schemas.android.com/tools"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:paddingBottom="@dimen/activity_vertical_margin"
android:paddingLeft="@dimen/activity_horizontal_margin"
android:paddingRight="@dimen/activity_horizontal_margin"
android:paddingTop="@dimen/activity_vertical_margin"
android:background="@drawable/back3"
tools:context=".Chegali" >
<LinearLayout 
android:id="@+id/linearLayout1"
android:layout_width="fill_parent"
android:layout_height="fill_parent"
android:orientation="vertical"
 >

  <ImageView
  android:layout_height="wrap_content"
  android:layout_width="fill_parent"
  android:src="@drawable/top" />
 <View
  android:layout_width="fill_parent"
  android:layout_height="1dp"
  android:layout_marginBottom="7dp"
  android:background="@android:color/darker_gray"/>

 <TextView
    android:id="@+id/subject"
    android:layout_width="fill_parent"
    android:layout_height="wrap_content"
    android:text="عنوان"
    android:textColor="#ffffff"
    android:layout_marginBottom="7dp"
    android:layout_gravity="right"
    android:background="@drawable/tv2_background"
    android:gravity="right"
    android:textAppearance="?android:attr/textAppearanceLarge" />
 <View
  android:layout_width="fill_parent"
   android:layout_height="1dp"
   android:background="@android:color/darker_gray"/>

 <RadioGroup
         android:id="@+id/rg"
         android:layout_width="fill_parent"
         android:layout_height="wrap_content"
         android:orientation="vertical"
         android:layout_marginTop="10dp"

         >



     <RadioButton 
            android:id="@+id/one"
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"
            android:textColor="#ffffff"
            android:text="چگالی"              
            android:layout_gravity="right"
            android:gravity="right"            
            android:textAppearance="?android:attr/textAppearanceLarge"
            />
  <EditText
    android:id="@+id/e1"
    android:layout_width="wrap_content"
    android:layout_height="wrap_content"
    android:textColor="#ffffff"
    android:background="@drawable/edit_text"
    android:textCursorDrawable="@null"
    android:textAppearance="?android:attr/textAppearanceLarge"
    android:ems="8" 
    android:inputType="number|numberDecimal|numberSigned"
    android:digits="0123456789."/>
  <requestFocus />



  <View
  android:layout_width="fill_parent"
  android:layout_height="1dp"
  android:background="@android:color/darker_gray"/>

  <RadioButton 
            android:id="@+id/two"
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"
            android:textColor="#ffffff"
            android:layout_gravity="right"
            android:gravity="right"
            android:text="جرم"                               
            android:textAppearance="?android:attr/textAppearanceLarge"
            />
  <EditText
    android:id="@+id/e2"
    android:layout_width="wrap_content"
    android:layout_height="wrap_content"
    android:textColor="#ffffff"
    android:background="@drawable/edit_text"
    android:textCursorDrawable="@null"
    android:textAppearance="?android:attr/textAppearanceLarge"
    android:ems="8" 
    android:inputType="number|numberDecimal|numberSigned"
    android:digits="0123456789."/>

  <View
    android:layout_width="fill_parent"
    android:layout_height="1dp"
    android:background="@android:color/darker_gray" />

    <RadioButton 
            android:id="@+id/three"
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"
            android:textColor="#ffffff"
            android:layout_gravity="right"
            android:gravity="right"
            android:text="حجم"           
            android:textAppearance="?android:attr/textAppearanceLarge"
            />
  <EditText
    android:id="@+id/e3"
    android:layout_width="wrap_content"
    android:layout_height="wrap_content"
    android:textColor="#ffffff"
    android:background="@drawable/edit_text"
    android:textCursorDrawable="@null"
    android:textAppearance="?android:attr/textAppearanceLarge"
    android:ems="8" 
    android:inputType="number|numberDecimal|numberSigned"
    android:digits="0123456789."/>



  </RadioGroup>




  <View
  android:layout_width="fill_parent"
  android:layout_height="1dp"
  android:background="@android:color/darker_gray"/>
  <RelativeLayout
    android:layout_width="wrap_content"
    android:layout_height="wrap_content"
    android:layout_gravity="right">
  <Button
    android:id="@+id/button1"
    android:textAppearance="?android:attr/textAppearanceLargeInverse"
    android:layout_width="wrap_content"
    android:layout_height="wrap_content"
    android:layout_marginTop="10dp"
    android:layout_toRightOf="@+id/button2"
    android:background="@drawable/button_shape"
    android:textColor="#ffffff"
    android:text="محاسبه" />

  <Button
    android:id="@+id/button2"
    android:textAppearance="?android:attr/textAppearanceLargeInverse"
    android:layout_width="wrap_content"
    android:layout_height="wrap_content"
    android:layout_marginTop="10dp"
    android:layout_marginRight="20dp"
    android:background="@drawable/button_shape"
    android:textColor="#ffffff"
    android:text="کمک" />

  </RelativeLayout>



  </LinearLayout>
  </ScrollView>