点击RadioGroup如何显示偏好

Question

我想创建一个RadioButtons列表来点击偏好设置。我做了这样的单选按钮：

<RadioGroup> 
     <Preference android:key="ex" android:summary="Example" android:title="Example"/> 
    <RadioGroup 
      android:id="@+id/radioSex" 
      android:layout_width="wrap_content" 
      android:layout_height="wrap_content" > 

      <RadioButton 
       android:id="@+id/radioMale" 
       android:layout_width="wrap_content" 
       android:layout_height="wrap_content" 
       android:text="@string/radio_male" 
       android:checked="true" /> 

      <RadioButton 
       android:id="@+id/radioFemale" 
       android:layout_width="wrap_content" 
       android:layout_height="wrap_content" 
       android:text="@string/radio_female" /> 

     </RadioGroup> 

后，Java文件

Preference ex; 
ex = (Preference) this.findPreference("ex"); 
ex.setOnPreferenceClickListener(new OnPreferenceClickListener() { 

}); 

在此之后，我不知道该怎么办英寸您可以发布代码以点击首选项显示单选按钮列表？非常感谢

Answer 1

没有可用的开箱即用的RadioGroup首选项。您需要通过扩展DialogPreference类来编写一个。

使用对话框内容创建单独的布局文件（/res/layout/pref_radiogroup.xml）。

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

    <RadioGroup 
     android:id="@+id/radioSex" 
     android:layout_width="wrap_content" 
     android:layout_height="wrap_content" > 

     <RadioButton 
      android:id="@+id/radioMale" 
      android:layout_width="wrap_content" 
      android:layout_height="wrap_content" 
      android:checked="true" 
      android:text="@string/radio_male" /> 

     <RadioButton 
      android:id="@+id/radioFemale" 
      android:layout_width="wrap_content" 
      android:layout_height="wrap_content" 
      android:text="@string/radio_female" /> 
    </RadioGroup> 

</FrameLayout> 

创建您的RadioGroupPreference类，它将扩展DialogPreference。

public class RadioGroupPreference extends DialogPreference { 

    private RadioGroup radioGroup; 

    public RadioGroupPreference(Context context, AttributeSet attrs) { 
     super(context, attrs); 
     setDialogLayoutResource(R.layout.pref_radiogroup); 
    } 

    @Override 
    protected View onCreateDialogView() { 
     View root = super.onCreateDialogView(); 
     radioGroup = (RadioGroup) root.findViewById(R.id.radioSex); 
     return root; 
    } 

    @Override 
    protected void onBindDialogView(View view) { 
     super.onBindDialogView(view); 
     setSelectedValue(getPersistedString("Male")); 
    } 

    @Override 
    protected void onDialogClosed(boolean positiveResult) { 
     super.onDialogClosed(positiveResult); 

     if (!positiveResult) { 
      return; 
     } 

     if (shouldPersist()) { 
      String valueToPersist = getSelectedValue(); 
      if (callChangeListener(valueToPersist)) { 
       persistString(valueToPersist); 
      } 
     } 
    } 

    @Override 
    protected Object onGetDefaultValue(TypedArray a, int index) { 
     return a.getString(index); 
    } 

    private void setSelectedValue(String value) { 
     for (int i = 0; i < radioGroup.getChildCount(); i++) { 
      View view = radioGroup.getChildAt(i); 
      if (view instanceof RadioButton) { 
       RadioButton radioButton = (RadioButton) view; 
       if (radioButton.getText().equals(value)) { 
        radioButton.setChecked(true); 
       } 
      } 

     } 
    } 

    private String getSelectedValue() { 
     int radioButtonId = radioGroup.getCheckedRadioButtonId(); 
     RadioButton radioButton = (RadioButton) radioGroup.findViewById(radioButtonId); 
     return (String) radioButton.getText(); 
    } 

} 

现在您只需将自定义首选项添加到您的首选项屏幕即可。

<com.package.RadioGroupPreference 
    android:summary="Radio Group Preference Summary" 
    android:title="Radio Group Preference" 
    android:key="preference_key" 
    android:defaultValue="@string/radio_male" />