使用字符串数组动态创建 RadioButton

Question

我正在尝试从字符串数组创建 RadioButton，但如果我只使用字符串则它不起作用，那么它似乎工作正常 Log Cat Showing error “ava.lang.IllegalStateException: 指定的孩子已经有一个父母。你必须先在孩子的父母上调用 removeView()。”

我知道错误即将到来，因为 RadioButton 对象不是动态创建的，所以会显示错误

我从这里获取代码以供参考，请检查此网址 http://android.okhelp.cz/create-radiobutton-radiogroup-dynamically-android-sample/

请检查代码并纠正我，以便我使用我的应用程序更进一步 这是代码

LinearLayout layout = (LinearLayout) findViewById(R.id.layout);
RadioGroup radioGroup = new RadioGroup(this);

LinearLayout.LayoutParams p = new LinearLayout.LayoutParams(
                LinearLayout.LayoutParams.FILL_PARENT,
                LinearLayout.LayoutParams.WRAP_CONTENT
        );

        // adding Radio Group
        layout.addView(radioGroup, p);

        // creating Radio buttons Object//
        RadioButton radioButtonView = new RadioButton(this);
        String[] ab ={"1","2"}; 

        for(int i =0; i<ab.length;i++)
        {
            radioButtonView.setText(ab[i]);
            radioGroup.addView(radioButtonView, p);
            ((ViewGroup)layout.getParent()).removeView(layout);
        }

并记录 Cat 错误

 I/Choreographer(4431): Skipped 547 frames!  The application may be doing too much work on its main thread.
 D/AndroidRuntime(4431): Shutting down VM
 W/dalvikvm(4431): threadid=1: thread exiting with uncaught exception (group=0xb2d2fb20)
  FATAL EXCEPTION: main
  Process: com.example.radiobuttondynamic, PID: 4431
  java.lang.IllegalStateException: The specified child already has a parent. You must call removeView() on the child's parent first.
    at android.view.ViewGroup.addViewInner(ViewGroup.java:3562)
    at android.view.ViewGroup.addView(ViewGroup.java:3415)
    at android.widget.RadioGroup.addView(RadioGroup.java:141)
    at android.view.ViewGroup.addView(ViewGroup.java:3391)
    at com.example.radiobuttondynamic.Radio_Button.onCreateOptionsMenu(Radio_Button.java:46)
    at android.app.Activity.onCreatePanelMenu(Activity.java:2538)
    at com.android.internal.policy.impl.PhoneWindow.preparePanel(PhoneWindow.java:436)
    at com.android.internal.policy.impl.PhoneWindow.doInvalidatePanelMenu(PhoneWindow.java:800)
    at com.android.internal.policy.impl.PhoneWindow$1.run(PhoneWindow.java:221)
    at android.view.Choreographer$CallbackRecord.run(Choreographer.java:761)
    at android.view.Choreographer.doCallbacks(Choreographer.java:574)
    at android.view.Choreographer.doFrame(Choreographer.java:543)
    at android.view.Choreographer$FrameDisplayEventReceiver.run(Choreographer.java:747)
    at android.os.Handler.handleCallback(Handler.java:733)
    at android.os.Handler.dispatchMessage(Handler.java:95)
    at android.os.Looper.loop(Looper.java:136)
    at android.app.ActivityThread.main(ActivityThread.java:5017)
    at java.lang.reflect.Method.invokeNative(Native Method)
    at java.lang.reflect.Method.invoke(Method.java:515)
    at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:779)
    at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:595)
    at dalvik.system.NativeStart.main(Native Method)
 D/dalvikvm(4431): GC_FOR_ALLOC freed 142K, 7% free 3094K/3308K, paused 107ms, total 113ms

寻求帮助 谢谢

Answer 1

如果你有这个数组：-

String route[] = {"1", "3", "4"};

您可以使用循环创建单选按钮：-

for (int i = 0; i < route.length; i++) 
{
    RadioButton radioButton = new RadioButton(this);
    radioButton.setText("Route " + String.valueOf(route[i]));
    radioButton.setId(i);
    rprms = new RadioGroup.LayoutParams(RadioGroup.LayoutParams.WRAP_CONTENT, RadioGroup.LayoutParams.WRAP_CONTENT);
    rgp.addView(radioButton, rprms);
}

您可以使用以下方法获取所选字段：- （我有保存按钮，所以这段代码是用 onClick 监听器编写的） 否则你也可以使用 onCheckedChangeListener。

int selection = rgp.getCheckedRadioButtonId();
for (int i = 0; i < route.length; i++) 
{
    if (i == selection)
        showToast("" + route[i]);
}

Answer 2

IllegalStateException：指定的孩子已经有一个父母。你 必须先在孩子的父母上调用 removeView()。

因为您在LinearLayout 中再次添加相同的RadioButton 实例。

在for循环中创建RadioButton的对象：

   for(int i =0; i<ab.length;i++)
    {
        RadioButton radioButtonView = new RadioButton(this);
        radioButtonView.setText(ab[i]);
        radioGroup.addView(radioButtonView, p);
        ((ViewGroup)layout.getParent()).removeView(layout);
    }   

在for循环内避免错误。

Answer 3

错误是您尝试在同一布局中多次添加相同的 RadioButton，您必须将 Radiobutton 创建移动到 for 循环内

    String[] ab ={"1","2"}; 

    for(int i =0; i<ab.length;i++)
    {
        RadioButton radioButtonView = new RadioButton(this);
        radioButtonView.setText(ab[i]);
        radioGroup.addView(radioButtonView, p);
        ((ViewGroup)layout.getParent()).removeView(layout);
    }

Answer 4

这对我来说似乎开箱即用：

 LinearLayout mLinearLayout = (LinearLayout) findViewById(R.id.linear1);
  for (int k = 1; k <= 20; k++) {
   //create text button
   TextView title = new TextView(this);
   title.setText("Question Number:" + k);
   title.setTextColor(Color.BLUE);
   mLinearLayout.addView(title);
   // create radio button
   final RadioButton[] rb = new RadioButton[5];
   RadioGroup rg = new RadioGroup(this);
   rg.setOrientation(RadioGroup.VERTICAL);
   for (int i = 0; i < 5; i++) {
    rb[i] = new RadioButton(this);
    rg.addView(rb[i]);
    rb[i].setText(countryName[i]);
 
   }
   mLinearLayout.addView(rg);
  }


Read more: http://www.androidhub4you.com/2013/04/dynamic-radio-button-demo-in-android.html#ixzz5dEVNFDe9

在此处查看完整代码http://www.androidhub4you.com/2013/04/dynamic-radio-button-demo-in-android.html