android - 以编程方式创建 RadioGroup

Question

我在使用以下代码时遇到错误

Error: The specified child already has a parent you must call removeView on the child's parent first

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

Answer 1

this 指定的 child 已经有一个 parent 。您必须先在子级父级上调用 removeView()。 因为您要多次将子级(单选组)添加到父级布局。

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

}