以编程方式创建 RadioGroup答案

【问题标题】：Creating RadioGroup programmatically以编程方式创建 RadioGroup
【发布时间】：2013-11-24 14:36:52
【问题描述】：

我在使用以下代码时遇到错误

错误：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

请任何人帮助我解决这个问题错误：

RadioButton[] radiobutton = new RadioButton[5];
RadioGroup radiogroup = new RadioGroup(this);
for (int i = 0; i < 5; i++) {

    LinearLayout listmainLayout = (LinearLayout) findViewById(R.id.phonelist);
    // listmainLayout.setLayoutParams(new
    // ListView.LayoutParams(width,
    // height / 10));
    listmainLayout.setGravity(Gravity.CENTER_VERTICAL);
    RelativeLayout mainlistLayout = new RelativeLayout(getApplicationContext());
    LinearLayout.LayoutParams mainlistLayoutParams = new LinearLayout.LayoutParams(
        (int) (width * 0.85), LayoutParams.WRAP_CONTENT);
    mainlistLayout.setLayoutParams(mainlistLayoutParams);
    // mainlistLayout.setOrientation(LinearLayout.VERTICAL);
    mainlistLayout.setPadding((int) (0.03 * width), 0, 0, 0);
    LinearLayout.LayoutParams radiogroupparams = new LinearLayout.LayoutParams(
        LinearLayout.LayoutParams.WRAP_CONTENT,
        LinearLayout.LayoutParams.WRAP_CONTENT);
    radiogroup.setLayoutParams(radiogroupparams);
    radiobutton[i] = new RadioButton(this);
    radiobutton[i].setText(" " + ContactsActivity.phonetype.get(i)
        + "    " + ContactsActivity.phone.get(i));
    radiobutton[i].setId(i + 100);
    radiogroup.removeView(radiobutton[i]);
    radiogroup.addView(radiobutton[i]);
    mainlistLayout.addView(radiogroup);
}

我的 logcat 显示：

11-12 17:51:11.500: E/AndroidRuntime(3353): FATAL EXCEPTION: main
11-12 17:51:11.500: E/AndroidRuntime(3353): java.lang.RuntimeException: Unable to start activity ComponentInfo{com.example.contacts_appetite/com.example.contacts_appetite.ContactDetalisList}: java.lang.IllegalStateException: The specified child already has a parent. You must call removeView() on the child's parent first.
11-12 17:51:11.500: E/AndroidRuntime(3353):     at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2059)
11-12 17:51:11.500: E/AndroidRuntime(3353):     at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:2084)
11-12 17:51:11.500: E/AndroidRuntime(3353):     at android.app.ActivityThread.access$600(ActivityThread.java:130)
11-12 17:51:11.500: E/AndroidRuntime(3353):     at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1195)
11-12 17:51:11.500: E/AndroidRuntime(3353):     at android.os.Handler.dispatchMessage(Handler.java:99)
11-12 17:51:11.500: E/AndroidRuntime(3353):     at android.os.Looper.loop(Looper.java:137)
11-12 17:51:11.500: E/AndroidRuntime(3353):     at android.app.ActivityThread.main(ActivityThread.java:4745)
11-12 17:51:11.500: E/AndroidRuntime(3353):     at java.lang.reflect.Method.invokeNative(Native Method)
11-12 17:51:11.500: E/AndroidRuntime(3353):     at java.lang.reflect.Method.invoke(Method.java:511)
11-12 17:51:11.500: E/AndroidRuntime(3353):     at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:786)
11-12 17:51:11.500: E/AndroidRuntime(3353):     at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:553)
11-12 17:51:11.500: E/AndroidRuntime(3353):     at dalvik.system.NativeStart.main(Native Method)
11-12 17:51:11.500: E/AndroidRuntime(3353): Caused by: java.lang.IllegalStateException: The specified child already has a parent. You must call removeView() on the child's parent first.
11-12 17:51:11.500: E/AndroidRuntime(3353):     at android.view.ViewGroup.addViewInner(ViewGroup.java:3378)
11-12 17:51:11.500: E/AndroidRuntime(3353):     at android.view.ViewGroup.addView(ViewGroup.java:3249)
11-12 17:51:11.500: E/AndroidRuntime(3353):     at android.view.ViewGroup.addView(ViewGroup.java:3194)
11-12 17:51:11.500: E/AndroidRuntime(3353):     at android.view.ViewGroup.addView(ViewGroup.java:3170)
11-12 17:51:11.500: E/AndroidRuntime(3353):     at com.example.contacts_appetite.ContactDetalisList.getView(ContactDetalisList.java:139)
11-12 17:51:11.500: E/AndroidRuntime(3353):     at com.example.contacts_appetite.ContactDetalisList.onCreate(ContactDetalisList.java:65)
11-12 17:51:11.500: E/AndroidRuntime(3353):     at android.app.Activity.performCreate(Activity.java:5008)
11-12 17:51:11.500: E/AndroidRuntime(3353):     at android.app.Instrumentation.callActivityOnCreate(Instrumentation.java:1079)
11-12 17:51:11.500: E/AndroidRuntime(3353):     at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2023)
11-12 17:51:11.500: E/AndroidRuntime(3353):     ... 11 more

【问题讨论】：

我认为这是错误的 RadioButton[] radiobutton = new RadioButton[ContactsActivity.phone .size()];
看到这个stackoverflow.com/questions/5096329/…
和你为radiogroup设置的布局将在循环之外，因为radiogroup布局设置一次现在你在组中添加你的按钮，所以不需要在循环中添加radiogroup

标签： android android-view android-radiobutton android-radiogroup

【解决方案1】：

这个The specified child already has a parent. You must call removeView() on the child's parent first. 因为您多次将子（单选组）添加到父布局。

这样试试

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);          
       rb[i].setText(" " + ContactsActivity.phonetype.get(i)
            + "    " + ContactsActivity.phone.get(i));
       rb[i].setId(i + 100);
       rg.addView(rb[i]);
    }
    ll.addView(rg);//you add the whole RadioGroup to the layout

}

【讨论】：

为什么在设置text和id之前有rg.addView(rb[i])？你也在最后再次向 rg 添加视图
是的。这将工作......并在最后添加 RadioGroup 到父布局。
对我来说，它只有在删除“rg.addView(radiobutton[i]);”后才有效
我也在尝试这个解决方案，但是使用这种方式单选组允许我选择其中的所有单选按钮。它应该是同一单选组中单选按钮的唯一选择。

【解决方案2】：

这是我的源代码，

首先创建字符串数组

<string-array name="websites_array">
    <item>Yahoo</item>
    <item>Hotmail</item>
    <item>Gmail</item>
    <item>Facebook</item>
    <item>Other</item>
</string-array>

然后在源代码中，

final RadioGroup radioGrp = (RadioGroup) findViewById(R.id.radioGroup);

    //get string array from source
    String[] websitesArray = getResources().getStringArray(R.array.websites_array);

    //create radio buttons
    for (int i = 0; i < websitesArray.length; i++) {
        RadioButton radioButton = new RadioButton(this);
        radioButton.setText(websitesArray[i]);
        radioButton.setId(i);
        radioGrp.addView(radioButton);
    }

    //set listener to radio button group
    radioGrp.setOnCheckedChangeListener(new RadioGroup.OnCheckedChangeListener() {
        @Override
        public void onCheckedChanged(RadioGroup group, int checkedId) {
            int checkedRadioButtonId = radioGrp.getCheckedRadioButtonId();
            RadioButton radioBtn = (RadioButton) findViewById(checkedRadioButtonId);
            Toast.makeText(ConfigurationActivity.this, radioBtn.getText(), Toast.LENGTH_SHORT).show();
        }
    });

就是这样……:)

【讨论】：

如果您已经拥有checkedId，那么调用getCheckedRadioButtonId() 有什么意义？

【解决方案3】：

试试这个

RadioButton[] radiobutton = new RadioButton[5];
  final  RadioGroup radiogroup = new RadioGroup(this);

LinearLayout listmainLayout = (LinearLayout) findViewById(R.id.phonelist);
        // listmainLayout.setLayoutParams(new
        // ListView.LayoutParams(width,
        // height / 10));
        listmainLayout.setGravity(Gravity.CENTER_VERTICAL);
        RelativeLayout mainlistLayout = new RelativeLayout(
                getApplicationContext());
        LinearLayout.LayoutParams mainlistLayoutParams = new LinearLayout.LayoutParams(
                (int) (width * 0.85), LayoutParams.WRAP_CONTENT);
        mainlistLayout.setLayoutParams(mainlistLayoutParams);
        // mainlistLayout.setOrientation(LinearLayout.VERTICAL);
        mainlistLayout.setPadding((int) (0.03 * width), 0, 0, 0);
        LinearLayout.LayoutParams radiogroupparams = new LinearLayout.LayoutParams(
                LinearLayout.LayoutParams.WRAP_CONTENT,
                LinearLayout.LayoutParams.WRAP_CONTENT);
        radiogroup.setLayoutParams(radiogroupparams);
    for (int i = 0; i < 5; i++) {


        radiobutton[i] = new RadioButton(this);
        radiobutton[i].setText(" " + ContactsActivity.phonetype.get(i)
                + "    " + ContactsActivity.phone.get(i));
        radiobutton[i].setId(i + 100);
        radiogroup.addView(radiobutton[i]);
        mainlistLayout.addView(radiogroup);

}

【讨论】：

【解决方案4】：

将数组添加到strings.xml：

<string-array name="some_array">
    <item>some_item_0</item>
    <item>some_item_1</item>
    <item>some_item_2</item>
</string-array>

我不认为你需要每个按钮的 id 而是文本，所以把这个方法放在某个地方（在我的例子中，这是 Utils 类）：

public static void fillRadioGroup(Context context, RadioGroup radioGroup, int stringArrayId){
    for (String s : context.getResources().getStringArray(stringArrayId)){
        RadioButton radioButton = new RadioButton(context);
        radioButton.setText(s);
        radioGroup.addView(radioButton);
    }

    if(radioGroup.getChildCount() > 0)
        radioGroup.check(radioGroup.getChildAt(0).getId());
}

那么你就可以调用它了：

Utils.fillRadioGroup(this, radioGroup, R.array.some_array);

要获取您需要调用的文本：

if(radioGroup.getChildCount() > 0)
    String text = ((RadioButton) findViewById(radioGroup.getCheckedRadioButtonId())).getText().toString();

【讨论】：

【解决方案5】：

class RadioButtonsGroup {

    private val buttons = ArrayList<RadioButton>()

    fun add(radioButton: RadioButton) {
        buttons.add(radioButton)

        radioButton.setOnClickListener {
            for (button in buttons) {
                if (radioButton !== button) {
                    button.isChecked = false
                }
            }

            radioButton.isChecked = true
        }
    }
}

【讨论】：

【解决方案6】：

    String selectedValue = "";
    LinearLayout linearLayout = findViewById(R.id.linearLayout);
    RadioGroup radioGroup = new RadioGroup(this);
    ArrayList<String> arrayList; //or replace your list here
    arrayList.add("Apple");
    arrayList.add("Melon");

    for (int i = 0; i < arrayList.size(); i++){
       RadioButton radioButton = new RadioButton(this);
       radioButton.setText(arrayList.get(i));
       radioGroup.addView(radioButton);

       int keyI = i;
       radioButton.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View v) {
                if (radioButton.isChecked()){
                   selectedValue = arrayList.get(keyI);
                   Toast.makeText(AnActivity.this,selectedValue, Toast.LENGTH_SHORT).show();
                }
            }
       });
    }
    linearLayout.addView(radioGroup);
    //to do with updated selectedValue

【讨论】：