Question

我正在尝试使用包含两个TextView和一个RadioButton的行为Listview扩充我的布局。我希望以这种方式添加的所有RadioButton都在同一个RadioGroup中。这是我到目前为止所做的：

@Override
    public View getView(int position, View convertView, ViewGroup parent) {
        View v = convertView;
        ViewHolder holder;
        if (v == null) {        
            LayoutInflater vi = 
                (LayoutInflater)activity.getSystemService(Context.LAYOUT_INFLATER_SERVICE);
            v = vi.inflate(R.layout.config_grid_item, null);
            holder = new ViewHolder();
            holder.item1 = (TextView) v.findViewById(R.id.config_item1);
            holder.item2 = (TextView) v.findViewById(R.id.config_item2);
            holder.item3 = (RadioButton) v.findViewById(R.id.config_item3);
            group.addView(holder.item3);
            v.setTag(holder);
        }
        else
            holder=(ViewHolder)v.getTag();

        final Profile profile = profiles.get(position);
        if (profile != null) {
            holder.item1.setText(profile.IP);
            holder.item2.setText(profile.name);
        }
        return v;
    }

行XML：

<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
    android:orientation="horizontal" android:layout_width="fill_parent"
    android:minHeight="60dip">

    <TextView android:id="@+id/config_item2" android:text="Name"
        android:layout_height="wrap_content" android:layout_width="wrap_content"
        android:layout_gravity="center_vertical" android:width="130dip"
        android:padding="10dip" />

    <TextView android:id="@+id/config_item1" android:text="IP"
        android:layout_height="wrap_content" android:layout_width="wrap_content"
        android:layout_gravity="center_vertical" android:width="130dip"
        android:padding="10dip" />
    <RadioButton android:id="@+id/config_item3" android:width="40dip"
        android:layout_width="wrap_content" android:layout_height="wrap_content"
        android:checked="false" android:focusable="false"
        android:focusableInTouchMode="false" />
</LinearLayout>

它在group.addView（holder.item3）崩溃了。错误日志在这里：

08-15 13:37:21.178: ERROR/AndroidRuntime(19749): java.lang.IllegalStateException: The specified child already has a parent. You must call removeView() on the child's parent first.
08-15 13:37:21.178: ERROR/AndroidRuntime(19749):     at android.view.ViewGroup.addViewInner(ViewGroup.java:1993)
08-15 13:37:21.178: ERROR/AndroidRuntime(19749):     at android.view.ViewGroup.addView(ViewGroup.java:1888)
08-15 13:37:21.178: ERROR/AndroidRuntime(19749):     at android.widget.RadioGroup.addView(RadioGroup.java:139)
08-15 13:37:21.178: ERROR/AndroidRuntime(19749):     at android.view.ViewGroup.addView(ViewGroup.java:1845)
08-15 13:37:21.178: ERROR/AndroidRuntime(19749):     at android.view.ViewGroup.addView(ViewGroup.java:1825)
08-15 13:37:21.178: ERROR/AndroidRuntime(19749):     at com.bluerisc.main.ConfigRowAdapter.getView(ConfigRowAdapter.java:67)
08-15 13:37:21.178: ERROR/AndroidRuntime(19749):     at android.widget.AbsListView.obtainView(AbsListView.java:1357)
08-15 13:37:21.178: ERROR/AndroidRuntime(19749):     at android.widget.ListView.measureHeightOfChildren(ListView.java:1200)
08-15 13:37:21.178: ERROR/AndroidRuntime(19749):     at android.widget.ListView.onMeasure(ListView.java:1111)
08-15 13:37:21.178: ERROR/AndroidRuntime(19749):     at android.view.View.measure(View.java:8222)
08-15 13:37:21.178: ERROR/AndroidRuntime(19749):     at android.view.ViewGroup.measureChildWithMargins(ViewGroup.java:3155)
08-15 13:37:21.178: ERROR/AndroidRuntime(19749):     at android.widget.FrameLayout.onMeasure(FrameLayout.java:245)
08-15 13:37:21.178: ERROR/AndroidRuntime(19749):     at android.view.View.measure(View.java:8222)
08-15 13:37:21.178: ERROR/AndroidRuntime(19749):     at android.view.ViewGroup.measureChildWithMargins(ViewGroup.java:3155)
08-15 13:37:21.178: ERROR/AndroidRuntime(19749):     at android.widget.LinearLayout.measureChildBeforeLayout(LinearLayout.java:1012)
08-15 13:37:21.178: ERROR/AndroidRuntime(19749):     at android.widget.LinearLayout.measureVertical(LinearLayout.java:381)
08-15 13:37:21.178: ERROR/AndroidRuntime(19749):     at android.widget.LinearLayout.onMeasure(LinearLayout.java:304)
08-15 13:37:21.178: ERROR/AndroidRuntime(19749):     at android.view.View.measure(View.java:8222)
08-15 13:37:21.178: ERROR/AndroidRuntime(19749):     at android.view.ViewGroup.measureChildWithMargins(ViewGroup.java:3155)
08-15 13:37:21.178: ERROR/AndroidRuntime(19749):     at android.widget.FrameLayout.onMeasure(FrameLayout.java:245)
08-15 13:37:21.178: ERROR/AndroidRuntime(19749):     at android.view.View.measure(View.java:8222)
08-15 13:37:21.178: ERROR/AndroidRuntime(19749):     at android.view.ViewGroup.measureChildWithMargins(ViewGroup.java:3155)
08-15 13:37:21.178: ERROR/AndroidRuntime(19749):     at android.widget.FrameLayout.onMeasure(FrameLayout.java:245)
08-15 13:37:21.178: ERROR/AndroidRuntime(19749):     at android.view.View.measure(View.java:8222)
08-15 13:37:21.178: ERROR/AndroidRuntime(19749):     at android.view.ViewRoot.performTraversals(ViewRoot.java:805)
08-15 13:37:21.178: ERROR/AndroidRuntime(19749):     at android.view.ViewRoot.handleMessage(ViewRoot.java:1764)
08-15 13:37:21.178: ERROR/AndroidRuntime(19749):     at android.os.Handler.dispatchMessage(Handler.java:99)
08-15 13:37:21.178: ERROR/AndroidRuntime(19749):     at android.os.Looper.loop(Looper.java:143)
08-15 13:37:21.178: ERROR/AndroidRuntime(19749):     at android.app.ActivityThread.main(ActivityThread.java:5068)
08-15 13:37:21.178: ERROR/AndroidRuntime(19749):     at java.lang.reflect.Method.invokeNative(Native Method)
08-15 13:37:21.178: ERROR/AndroidRuntime(19749):     at java.lang.reflect.Method.invoke(Method.java:521)
08-15 13:37:21.178: ERROR/AndroidRuntime(19749):     at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:858)
08-15 13:37:21.178: ERROR/AndroidRuntime(19749):     at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:616)
08-15 13:37:21.178: ERROR/AndroidRuntime(19749):     at dalvik.system.NativeStart.main(Native Method)

从错误日志中我可以猜到，因为RadioButton已经是xml行中的LinearLayout的子节点，它不希望被添加到radioGroup。有关如何解决此问题的任何想法？我基本上只想要一次选择一个单选按钮，这就是我将它们添加到一个无线电组的原因。

编辑：我只是听到了错误信息并试图从LinearLayout中删除视图的天才想法。它没有崩溃，但现在RadioButton没有出现在我的行中。进展如何？这是我添加/更改的内容：

        LinearLayout test = (LinearLayout) v.findViewById(R.id.LinearRadio);
        test.removeView(holder.item3);
        group.addView(holder.item3);

Answer 1

您无法同时向2个布局添加视图。
阅读完编辑后：是的，您将无法查看该单选按钮，因为它已从可见父项中删除并添加到不可见的无线电组中。

似乎你需要一个listview的listview，每行有两行。项目行为listView.setChoiceMode(ListView.CHOICE_MODE_SINGLE);的{{1}}可以满足需求。

Answer 2

您需要将无父线性LinearLayout添加到RadioGroup。

        LayoutInflater vi = (LayoutInflater)activity.getSystemService(Context.LAYOUT_INFLATER_SERVICE);
        v = vi.inflate(R.layout.config_grid_item, null);
        holder = new ViewHolder();
        holder.item1 = (TextView) v.findViewById(R.id.config_item1);
        holder.item2 = (TextView) v.findViewById(R.id.config_item2);
        holder.item3 = (RadioButton) v.findViewById(R.id.config_item3);
        group.addView(v);

Answer 3

不是很好的解决方案......只需取消选中所有的无线电按钮即可。（Radiogroup根本不需要） private void uncheckRadioBtn（）{for（int i = 0; i＆lt; contactMaxNum; ++ i）if（rb [i] .isChecked（））rb [i] .setChecked（false）;}

如何使用RadioButton扩充布局，然后添加到RadioGroup？

3 个答案: