android - DialogFragment 中的 RadioButton 监听器

Question

我尝试实现 RadioGroup View 并将其放入 DialogFragment 中，但出了点问题。我已按照本教程进行操作

http://developer.android.com/guide/topics/ui/controls/radiobutton.html

而是在 Activity 中， View 在 DialogFragment 中初始化:

public class MenuDialog extends DialogFragment {

    public MenuDialog(){}

    @Override
    public void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
    }

    @Override
    public View onCreateView(LayoutInflater inflater, ViewGroup container, Bundle savedInstanceState) {
        View view = inflater.inflate(R.layout.menu_layout, container);
        this.getDialog().setTitle("title");
        return view;
    }

public void onRadioButtonClicked(View view) {
    boolean checked = ((RadioButton) view).isChecked();
    switch(view.getId()) {
    case R.id.radio1:
        if(checked) {
            Log.i("MENU", ((RadioButton)view).getText());
        }
        break;
    case R.id.radio2:
        if(checked) {
            Log.i("MENU", ((RadioButton)view).getText());
        }
        break;
    case R.id.radio3:
        if(checked) {
            Log.i("MENU", ((RadioButton)view).getText());
        }
        break;
    case R.id.radio4:
        if(checked) {
            Log.i("MENU", ((RadioButton)view).getText());
        }
        break;
    }
    this.getDialog().dismiss();
}

xml:

<?xml version="1.0" encoding="utf-8"?>

<RadioGroup
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    android:id="@+id/radio_group" >

    <RadioButton
        android:id="@+id/radio1"
        android:text="20" />

    <RadioButton
        android:id="@+id/radio2"
        android:text="40" />

    <RadioButton
        android:id="@+id/radio3"
        android:text="60" />

    <RadioButton
        android:id="@+id/radio4"
        android:text="80" />
</RadioGroup>

onRadioButtonClicked 监听器，实现方式同教程。现在，当启动对话框时，如果我点击单选按钮，我会收到此错误:

09-27 09:41:08.018: E/AndroidRuntime(7447): FATAL EXCEPTION: main
09-27 09:41:08.018: E/AndroidRuntime(7447): java.lang.IllegalStateException: Could not
 find a method onRadioButtonClicked(View) in the activity class 
android.view.ContextThemeWrapper for onClick handler on view class 
android.widget.RadioButton with id 'radio1'

怎么了？

Answer 1

我宁愿在 fragment 内部实现点击处理程序并动态添加监听器(通过 java 而不是 XML)。所以我会做这样的事情:

public class MenuDialog extends DialogFragment implements OnClickListener{
[...]    
@Override
public View onCreateView(LayoutInflater inflater, ViewGroup container, Bundle savedInstanceState) {
    View view = inflater.inflate(R.layout.menu_layout, container);
    view.findViewById(R.id.radio1).setOnClickListener(this);
    view.findViewById(R.id.radio2).setOnClickListener(this);
    //and so on [...]
    this.getDialog().setTitle("title");
    return view;
}

@Override
public void onClick(View v){
    [...]
}