RadioGroup, RadioButton

layout.xml
<RadioGroup
     android:id="@+id/radGrpSex"
     android:layout_width="wrap_content"
     android:layout_height="wrap_content"
     android:orientation="vertical"
     android:checkedButton="@+id/radBtnMale">
     <RadioButton
         android:id="@+id/radBtnMale"
         android:layout_width="wrap_content"
         android:layout_height="wrap_content"
         android:textSize="20sp"
         android:text="@string/male" />
     <RadioButton
         android:id="@+id/radBtnFemale"
         android:layout_width="wrap_content"
         android:layout_height="wrap_content"
         android:textSize="20sp"
         android:text="@string/female" />
</RadioGroup>
<RadioGroup
     android:id="@+id/radGrpAge"
     android:layout_width="wrap_content"
     android:layout_height="wrap_content"
     android:orientation="vertical"
     android:checkedButton="@+id/radBtnAgeRange1">
     <RadioButton
         android:id="@+id/radBtnAgeRange1"
         android:layout_width="wrap_content"
         android:layout_height="wrap_content"
         android:textSize="20sp"
         android:text="@string/male_age_range1" />
    <RadioButton
        android:id="@+id/radBtnAgeRange2"
         android:layout_width="wrap_content"
         android:layout_height="wrap_content"
        android:textSize="20sp"
        android:text="@string/male_age_range2" />
    <RadioButton
        android:id="@+id/radBtnAgeRange3"
         android:layout_width="wrap_content"
         android:layout_height="wrap_content"
        android:textSize="20sp"
        android:text="@string/male_age_range3" />
 </RadioGroup>

src/
private Button mBtnOK;
private RadioGroup mRadGrpSex, mRadGrpAge;
private RadioButton mRadBtnAgeRange1, mRadBtnAgeRange2, mRadBtnAgeRange3;
@Override
 protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);
        ...
        mBtnOK = (Button) findViewById(R.id.btnOK);
        mBtnOK.setOnClickListener(btnOKOnClick);

        mRadGrpSex = (RadioGroup)findViewById(R.id.radGrpSex);
        mRadGrpAge = (RadioGroup)findViewById(R.id.radGrpAge);
        mRadBtnAgeRange1 = (RadioButton)findViewById(R.id.radBtnAgeRange1);
        mRadBtnAgeRange2 = (RadioButton)findViewById(R.id.radBtnAgeRange2);
        mRadBtnAgeRange3 = (RadioButton)findViewById(R.id.radBtnAgeRange3);
        mRadGrpSex.setOnCheckedChangeListener(radGrpSexOnCheckedChange);
 }

private View.OnClickListener btnOKOnClick = new View.OnClickListener() {

    @Override
    public void onClick(View v) {
        // TODO Auto-generated method stub
        String strSug = getString(R.string.result);
        // 不需要判斷男女生，直接依照選擇的年齡區間顯示結果
        switch (mRadGrpAge.getCheckedRadioButtonId()) {
            case R.id.radBtnAgeRange1:
                 strSug += getString(R.string.sug_not_hurry);
                 break;
            case R.id.radBtnAgeRange2:
                 strSug += getString(R.string.sug_find_couple);
                 break;
            case R.id.radBtnAgeRange3:
                 strSug += getString(R.string.sug_get_married);
                 break;
       }
       mTxtR.setText(strSug);
    }
};

private RadioGroup.OnCheckedChangeListener radGrpSexOnCheckedChange = new              
                                                                                   RadioGroup.OnCheckedChangeListener() {

    @Override
    public void onCheckedChanged(RadioGroup group, int checkedId) {
         // TODO Auto-generated method stub
         if (checkedId == R.id.radBtnMale) {
             mRadBtnAgeRange1.setText(getString(R.string.male_age_range1));
             mRadBtnAgeRange2.setText(getString(R.string.male_age_range2));
             mRadBtnAgeRange3.setText(getString(R.string.male_age_range3));
         } else {
             mRadBtnAgeRange1.setText(getString(R.string.female_age_range1));
             mRadBtnAgeRange2.setText(getString(R.string.female_age_range2));
             mRadBtnAgeRange3.setText(getString(R.string.female_age_range3));
         }
    }
};