ListView / ExpandableListView setEmptyView() 没有效果

Question

我试图为三个列表视图（即 2 个可扩展视图和 1 个列表视图）设置空视图，它们位于不同的选项卡中：

LayoutInflater inflater = getLayoutInflater();
        View emptyView = inflater.inflate(R.layout.empty_view, null, false);
...
ExpListView1.setEmptyView(emptyView);
ListView.setEmptyView(emptyView);
ExpListView2.setEmptyView(emptyView);

它没有效果 - 不会出现空视图。与该代码段相同：

View emptyView = inflater.inflate(R.layout.empty_view, null, false);
View emptyRelativeLayout = (RelativeLayout) emptyView.findViewById(R.id.empty_view_layout);
ExpListView1.setEmptyView(emptyRelativeLayout);

empty_view_layout.xml：

<RelativeLayout
  xmlns:android="http://schemas.android.com/apk/res/android"
  android:orientation="vertical"
  android:layout_width="fill_parent"
  android:layout_height="fill_parent"
  android:id="@+id/empty_view_layout">
    <TextView
    style="@android:style/TextAppearance.Large"
    android:id="@+id/empty_view_textview"
    android:layout_width = "fill_parent"
    android:layout_height="fill_parent"
    android:text="@string/no_items_in_list" 
    android:layout_centerInParent="true"/>
</RelativeLayout>

Answer 1

通过将空视图作为另一个内容视图添加到我的活动中解决了问题：

@Override
public void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    setContentView(R.layout.main);

    inflater = getLayoutInflater();
    emptyView = inflater.inflate(R.layout.empty_view, null);
    addContentView(emptyView, new LayoutParams(LayoutParams.FILL_PARENT, LayoutParams.FILL_PARENT));

Answer 2

我这样做了：

activity_main.xml

<RelativeLayout
        android:layout_width="match_parent"
        android:layout_height="match_parent">

        <ExpandableListView
            android:layout_width="match_parent"
            android:layout_height="match_parent"
            android:id="@+id/expListView">

        </ExpandableListView>


        <TextView
            android:id="@+id/txtEmptyView"
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"
            android:layout_centerInParent="true"
            android:gravity="center"
            android:padding="10dp"
            android:text="@string/no_game_available"
            android:textAppearance="@android:style/TextAppearance.Medium"
            android:textColor="@android:color/white" />

</RelativeLayout>

MainActivity.java

ExpandableListView expandableListView = (ExpandableListView) findViewById(R.id.expandableListView);

TextView txtEmptyView = (TextView) view.findViewById(R.id.txtEmptyView);

expandableListView.setEmptyView(txtEmptyView);

希望这会对您有所帮助。