动态单选按钮控件

Question

代码... {

private void createRadioButton() { 

     final RadioButton[] rb = new RadioButton[5]; 
     for(int i=0; i<5; i++){ 
      rb[i] = new RadioButton(this); 
      ll.addView(rb[i]); 
      rb[i].setText("Test"); 
     } 
     ll.addView(submit); 
      submit.setOnClickListener(new View.OnClickListener() { 
      public void onClick(View v) { 
       for(int i = 0; i < 5; i++) { 
        ll.removeView(rb[i]); 
       } 
       ll.removeView(submit); 
       Questions(); 
     }}); 
    } 

我遇到的问题是，单选按钮出现，用户可以选择任何一个。作为一个初学者，我确定我没有正确设置单选按钮。用户可以选择全部五个按钮，然后一旦选择他们也不能取消选中它们。用户应该只能从五个选项中选择一个选项......我如何使这个可能？

Answer 1

您必须添加单选按钮到RadioGroup，然后RadioGroup中布局

我错过喜欢的是提交的，但你的代码看起来应该像一些信息：

private void createRadioButton() { 
    final RadioButton[] rb = new RadioButton[5]; 
    RadioGroup rg = new RadioGroup(this); //create the RadioGroup 
    rg.setOrientation(RadioGroup.HORIZONTAL);//or RadioGroup.VERTICAL 
    for(int i=0; i<5; i++){ 
     rb[i] = new RadioButton(this); 
     rg.addView(rb[i]); //the RadioButtons are added to the radioGroup instead of the layout 
     rb[i].setText("Test"); 
    } 
    ll.addView(rg);//you add the whole RadioGroup to the layout 
    ll.addView(submit); 
    submit.setOnClickListener(new View.OnClickListener() { 
     public void onClick(View v) { 
      for(int i = 0; i < 5; i++) { 
       rg.removeView(rb[i]);//now the RadioButtons are in the RadioGroup 
      } 
      ll.removeView(submit); 
      Questions(); 
     } 
    }); 
} 

Answer 2

你必须在布局文件中创建一个RadioGroup中

<TableRow> 
    <RadioGroup 
     android:layout_width="fill_parent" 
     android:layout_height="wrap_content" 
     android:orientation="vertical" 
     android:id="@+id/radiobuttons"> 
    </RadioGroup> 
</TableRow> 

，然后以编程按钮添加到它：

public void makeRadioButtons(Vector tmpVector, int i, 
LinearLayout.LayoutParams lp) 
{ 
    RadioButton rb = new RadioButton(this); 
    rb.setText((String) tmpVector.elementAt(i)); 
    //rg is private member of class which refers to the radio group which you can find by id. 
    rg.addView(rb, 0, lp); 

} 

希望这会有所帮助。

Answer 3

您的布局。

<LinearLayout 
    android:id="@+id/linearMain" 
    android:layout_width="fill_parent" 
    android:layout_height="wrap_content" 
    android:orientation="vertical" 
    > 
    <RadioGroup 
     android:id="@+id/radiogroup" 
     android:layout_width="wrap_content" 
     android:layout_height="wrap_content" 
     xmlns:android="http://schemas.android.com/apk/res/android" 
     android:orientation="vertical" 
    > 
    </RadioGroup> 
</LinearLayout> 

代码

RadioGroup rg = (RadioGroup) findViewById(R.id.radiogroup);//not this RadioGroup rg = new RadioGroup(this); 
rg.setOrientation(RadioGroup.HORIZONTAL);//or RadioGroup.VERTICAL 
    for(int i=0; i<5; i++) 
    { 
     rb[i] = new RadioButton(this); 
     rg.addView(rb[i]); 
     rb[i].setText("Test"); 
    } 

希望这有助于你。