添加RadioGroup中到AlertDialog中Android的

Question

我需要一个RadioGroup中添加到AlertDialog，所以我写了如下代码：

AlertDialog.Builder screenDialog = new AlertDialog.Builder(this); 
screenDialog.setTitle("Captured Screen"); 

RadioGroup azione = (RadioGroup) findViewById(R.id.azione_stop); 

LinearLayout dialogLayout = new LinearLayout(getApplicationContext()); 
dialogLayout.setOrientation(LinearLayout.VERTICAL); 
dialogLayout.addView(azione); 
screenDialog.setView(dialogLayout); 
screenDialog.show(); 

这是包含RadioGroup中的XML：

<?xml version="1.0" encoding="utf-8"?> 
<RadioGroup xmlns:android="http://schemas.android.com/apk/res/android" 
    android:id="@+id/azione_stop" 
    android:layout_width="wrap_content" 
    android:layout_height="wrap_content" > 
    <RadioButton 
     android:id="@+id/ritornare" 
     android:layout_width="wrap_content" 
     android:layout_height="wrap_content" 
     android:checked="true" 
     android:textColor="#000000" 
     android:text="Ritornare" /> 
    <RadioButton 
     android:id="@+id/chiudi" 
     android:layout_width="wrap_content" 
     android:layout_height="wrap_content" 
     android:textColor="# 
     android:text="Chiudi chiamata" /> 
    <RadioButton 
     android:id="@+id/offerta" 
     android:layout_width="wrap_content" 
     android:layout_height="wrap_content" 
     android:textColor="#000000" 
    android:text="Segna offerta" /> 

当我打开alertdialog时，我得到一个错误（java.lang.NullPointerException），其中RadioGroup被添加到LinearLayout中。 我该怎么办？ 谢谢，马蒂亚

Answer 1

RadioGroup azione = (RadioGroup) screenDialog.findViewById(R.id.azione_stop); 

和screenDialog.setContentView(R.layout.YOURXML);

AlertDialog screenDialog = new AlertDialog.Builder(this).create(); 
screenDialog.setTitle("Captured Screen"); 
screenDialog.setContentView(R.layout.YOURXMLLAYOUT); 

RadioGroup azione = (RadioGroup) findViewById(R.id.azione_stop); 

screenDialog.show();