錯誤在對話視圖

Question

我有，我有我從中選擇了一個檢查單選一個RadioGroup中的對話視圖從RadioGroup中選擇一個單選按鈕...
但它顯示了以下錯誤：

01-28 14:24:02.833: E/AndroidRuntime(4186): FATAL EXCEPTION: main 
01-28 14:24:02.833: E/AndroidRuntime(4186): java.lang.NullPointerException 
01-28 14:24:02.833: E/AndroidRuntime(4186):  at com.james.restme.MainActivity.onOptionsItemSelected(MainActivity.java:43) 
01-28 14:24:02.833: E/AndroidRuntime(4186):  at android.app.Activity.onMenuItemSelected(Activity.java:2534) 
01-28 14:24:02.833: E/AndroidRuntime(4186):  at com.android.internal.view.menu.MenuBuilder.dispatchMenuItemSelected(MenuBuilder.java:735) 
01-28 14:24:02.833: E/AndroidRuntime(4186):  at com.android.internal.view.menu.MenuItemImpl.invoke(MenuItemImpl.java:149) 
01-28 14:24:02.833: E/AndroidRuntime(4186):  at com.android.internal.view.menu.MenuPopupHelper.onItemClick(MenuPopupHelper.java:156) 
01-28 14:24:02.833: E/AndroidRuntime(4186):  at android.widget.AdapterView.performItemClick(AdapterView.java:298) 
01-28 14:24:02.833: E/AndroidRuntime(4186):  at android.widget.AbsListView.performItemClick(AbsListView.java:1086) 
01-28 14:24:02.833: E/AndroidRuntime(4186):  at android.widget.AbsListView$PerformClick.run(AbsListView.java:2855) 
01-28 14:24:02.833: E/AndroidRuntime(4186):  at android.widget.AbsListView$1.run(AbsListView.java:3529) 
01-28 14:24:02.833: E/AndroidRuntime(4186):  at android.os.Handler.handleCallback(Handler.java:615) 
01-28 14:24:02.833: E/AndroidRuntime(4186):  at android.os.Handler.dispatchMessage(Handler.java:92) 
01-28 14:24:02.833: E/AndroidRuntime(4186):  at android.os.Looper.loop(Looper.java:137) 
01-28 14:24:02.833: E/AndroidRuntime(4186):  at java.lang.reflect.Method.invokeNative(Native Method) 
01-28 14:24:02.833: E/AndroidRuntime(4186):  at java.lang.reflect.Method.invoke(Method.java:511) 

這是類文件...

public boolean onOptionsItemSelected(MenuItem item) { 
    // TODO Auto-generated method stub 

    switch (item.getItemId()) { 
    case R.id.menu_info: 

     break; 
    case R.id.menu_config: 
     Dialog adc = new Dialog(this); 
     adc.setContentView(R.layout.config_dialog); 
     RadioGroup rg1 = (RadioGroup) findViewById(R.id.radioGroup1); 
     Button btn = (Button) findViewById(R.id.button1); 
     rg1.setOnCheckedChangeListener(new OnCheckedChangeListener() { 

      @Override 
      public void onCheckedChanged(RadioGroup group, int checkedId) { 

      } 

     }); 
     adc.setTitle("Custom Dialog"); 
     adc.show(); 
     break; 
    case R.id.menu_demo: 
     break; 
    case R.id.menu_act: 
     break; 

    } 

    return super.onOptionsItemSelected(item); 
} 

這是xml文件...

<LinearLayout 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="match_parent" 
    android:layout_height="wrap_content" > 

    <RadioButton 
     android:id="@+id/radio0" 
     android:layout_width="wrap_content" 
     android:layout_height="wrap_content" 
     android:text="set up Account" /> 

    <RadioButton 
     android:id="@+id/radio1" 
     android:layout_width="wrap_content" 
     android:layout_height="wrap_content" 
     android:text="Check account" /> 

    <RadioButton 
     android:id="@+id/radio2" 
     android:layout_width="wrap_content" 
     android:checked="true" 
     android:layout_height="wrap_content" 
     android:text="Change config password" /> 

    <RadioButton 
     android:id="@+id/radio3" 
     android:layout_width="wrap_content" 
     android:layout_height="wrap_content" 
     android:text="Download new skin" /> 

    <RadioButton 
     android:id="@+id/radio4" 
     android:layout_width="wrap_content" 
     android:layout_height="wrap_content" 
     android:text="Download new que" /> 

    <RadioButton 
     android:id="@+id/radio5" 
     android:layout_width="wrap_content" 
     android:layout_height="wrap_content" 
     android:text="RadioButton" /> 
</RadioGroup> 

<Button 
    android:id="@+id/button1" 
    android:layout_width="wrap_content" 
    android:layout_height="wrap_content" 
    android:text="click" /> 

Answer 1

RadioGroup中和按鈕是在對話框的佈局部分..嘗試如下

Dialog adc = new Dialog(this); 
     adc.setContentView(R.layout.config_dialog); 
     RadioGroup rg1 = (RadioGroup) adc.findViewById(R.id.radioGroup1);//check here 
     Button btn = (Button) adc.findViewById(R.id.button1);//check here 
     rg1.setOnCheckedChangeListener(new OnCheckedChangeListener() { 

      @Override 
      public void onCheckedChanged(RadioGroup group, int checkedId) { 

      } 

     }); 
     adc.setTitle("Custom Dialog"); 
     adc.show();