Android.Support.Design.Widget.TabItem不能强制转换为Android.View.ViewGroup

Question

我在运行时得到以下错误。

E/AndroidRuntime：致命异常：main process：com.example.usamaakmal.trackpoint,pid：8774 Android.view.filflateException：二进制XML文件行0:Android.support.design.widget.tabItem不能强制转换为Android.view.viewgroup由：java.lang.classCastException：Android.support.design.widget.tabItem导致。java:872)在Android.view.layoutinflater.rinflateChildren（layoutinflater.java:832)，在Android.view.layoutinflater.rinflateChildren（layoutinflater.java:872)，在Android.view.layoutinflater.rinflateChildren（layoutinflater.java:872)，在Android.view.layoutinflater.rinflateChildren（layoutinflater.java:832)，在erdialog.java:20)在Android.support.v4.app.fragment.performCreateView（fragment.java:2354)在Android.support.v4.app.fragmentManagerimpl.moveToState（fragmentManager.java:1419)在Android.support.v4.app.fragmentManagerimpl.moveFragmentToExpectedState（fragmentManager.java:1740)在在Android.support.v4.app.fragmentmanagerimpl.executeops（fragmentmanager.java:2580)在Android.support.v4.app.fragmentmanagerimpl.executeopstogether（fragmentmanager.java:2367)在Android.support.v4.app.fragmentmanagerimpl.removereddantoperationsandexecute（fragmentmanager.java:2322)在dispatchMessage（handler.jav）a:98)在Android.os.looper.loop(looper.java:156)在Android.app.activitythread.main（activitythread.java:6523)在java.lang.reflect.Method.invoke（原生方法）在com.android.internal.os.zygoteinit$methodandargscaller.run(zygoteinit.java:832)在com.android.internal.os.zygoteinit.main(zygoteinit.java:832)

我的XML布局如下所示

<?xml version="1.0" encoding="utf-8"?>
<RelativeLayout
    xmlns:android="http://schemas.android.com/apk/res/android" android:layout_width="match_parent"
    android:layout_height="wrap_content">

    <TextView
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_alignParentTop="true"
        android:text="Select Date And Time"
        android:textSize="20dp"
        android:layout_centerHorizontal="true"
        android:layout_marginTop="10dp"
        android:id="@+id/tv_date_time_title"/>


    <android.support.design.widget.TabLayout
        android:id="@+id/date_time_tab_layout"
        android:layout_width="match_parent"
        android:layout_height="match_parent"
        android:layout_below="@id/tv_date_time_title"
        android:layout_centerVertical="true">

        <android.support.design.widget.TabItem
            android:id="@+id/tab_date_item"
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"
            android:text="Date">

            <DatePicker android:id="@+id/dp_date_picker"></DatePicker>

        </android.support.design.widget.TabItem>

        <android.support.design.widget.TabItem
            android:id="@+id/tab_time_item"
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"
            android:text="Time">

            <TimePicker android:id="@+id/tp_time_picker"></TimePicker>
        </android.support.design.widget.TabItem>
    </android.support.design.widget.TabLayout>
</RelativeLayout>

我的自定义对话框片段类如下所示

public class DateTimePickerDialog extends DialogFragment {
    @Nullable
    @Override
    public View onCreateView(LayoutInflater inflater, @Nullable ViewGroup container, @Nullable Bundle savedInstanceState) {
        View view = inflater.inflate(R.layout.date_time_picker_layout,container,false);
        return view;
    }
}

Answer 1

tabitem扩展视图。参考这里。因此，不能在TabItem中包含另一个视图。

<?xml version="1.0" encoding="utf-8"?>
<RelativeLayout
    xmlns:android="http://schemas.android.com/apk/res/android" android:layout_width="match_parent"
    android:layout_height="wrap_content">

    <TextView
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_alignParentTop="true"
        android:text="Select Date And Time"
        android:textSize="20dp"
        android:layout_centerHorizontal="true"
        android:layout_marginTop="10dp"
        android:id="@+id/tv_date_time_title"/>


    <android.support.design.widget.TabLayout
        android:id="@+id/date_time_tab_layout"
        android:layout_width="match_parent"
        android:layout_height="match_parent"
        android:layout_below="@id/tv_date_time_title"
        android:layout_centerVertical="true">

        <android.support.design.widget.TabItem
            android:id="@+id/tab_date_item"
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"
            android:text="Date" />

        <android.support.design.widget.TabItem
            android:id="@+id/tab_time_item"
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"
            android:text="Time" />
    </android.support.design.widget.TabLayout>
</RelativeLayout>