新手求指教！动态添加RadioButton的错误

[晨曦琉璃]

代码部分

public class MainActivity extends AppCompatActivity {
    ArrayList<String> totalList=new ArrayList<String>();
    Handler ChangeUI_Handler;
    RadioGroup rg;
    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);
        Intent getintent = getIntent();
        totalList=getintent.getStringArrayListExtra("totalList");
        rg=(RadioGroup)findViewById(R.id.radiogroup);
        RadioButton rbtn = new RadioButton(this);
        RadioGroup.LayoutParams layoutParams = new RadioGroup.LayoutParams(RadioGroup.LayoutParams.WRAP_CONTENT,50);
        rbtn.setLayoutParams(layoutParams);

        for (int t=0;t<=totalList.size();t++){
            rbtn.setId(t);
            rbtn.setGravity(Gravity.CENTER);
            rbtn.setText(totalList.get(t));
            rg.addView(rbtn);
        }
}

XML

<?xml version="1.0" encoding="utf-8"?>
<android.support.constraint.ConstraintLayout xmlns:android="http://schemas.android.com/apk/res/android"
    xmlns:app="http://schemas.android.com/apk/res-auto"
    xmlns:tools="http://schemas.android.com/tools"
    android:layout_width="match_parent"
    android:layout_height="match_parent">


    <LinearLayout
        android:layout_width="368dp"
        android:layout_height="495dp"
        android:orientation="vertical"
        tools:layout_editor_absoluteX="8dp"
        tools:layout_editor_absoluteY="8dp">


        <HorizontalScrollView
            android:layout_width="match_parent"
            android:layout_height="wrap_content"
            android:scrollbars="none">

            <RadioGroup
                android:id="@+id/radiogroup"
                android:layout_width="wrap_content"
                android:layout_height="match_parent"
                android:orientation="horizontal">

            </RadioGroup>
        </HorizontalScrollView>

        <ListView
            android:id="@+id/Mainlist"
            android:layout_width="match_parent"
            android:layout_height="match_parent"
            android:layout_weight="1" />

    </LinearLayout>
</android.support.constraint.ConstraintLayout>

addView那行报错java.lang.IllegalStateException: The specified child already has a parent. You must call removeView() on the child's parent first.
求指教怎么修改，谢谢！

[moonFY]

The specified child already has a parent. You must call removeView() on the child's parent first.

[只为搞笑]

        RadioButton rbtn = new RadioButton(this);
        RadioGroup.LayoutParams layoutParams = new RadioGroup.LayoutParams(RadioGroup.LayoutParams.WRAP_CONTENT,50);
        rbtn.setLayoutParams(layoutParams);

这一截代码要放到循环体内，要不你循环里一直添加的是同一个RadioButton，重复添加当然会报错咯

[晨曦琉璃]

引用 2 楼 u010668114 的回复:

        RadioButton rbtn = new RadioButton(this);
        RadioGroup.LayoutParams layoutParams = new RadioGroup.LayoutParams(RadioGroup.LayoutParams.WRAP_CONTENT,50);
        rbtn.setLayoutParams(layoutParams);

这一截代码要放到循环体内，要不你循环里一直添加的是同一个RadioButton，重复添加当然会报错咯

感谢！解决了！