Question

我试图在片段中实现ExpandableListView。更新的测试列表未在布局视图中显示。我尝试了与新项目相同的代码（在活动中似乎有效），但我无法在片段中找出问题。视图没有生成。我已经粘贴了我一直在尝试的代码。这可能是什么问题？请告诉我片段出错的地方。

编辑（2/2/2017） 我发现的实际问题是，

我一直在ScrollView中使用ExpandableListView，

           <ScrollView
            android:id="@+id/scrollFragHome"
            android:layout_width="match_parent"
            android:layout_height="match_parent"
            android:fillViewport="true">

           ...........other layouts ......

                <ExpandableListView
                            android:id="@+id/resHubExpandableListView"
                            android:layout_width="match_parent"
                            android:layout_height="wrap_content"
                            android:background="@color/white"
                            android:divider="@null"
                            android:groupIndicator="@null"
                            android:nestedScrollingEnabled="true" />
          </ScrollView>

我必须给列表视图固定高度的layout_width以查看它的所有视图。我在开始时使用了wrap_content，但它并没有按原样扩展listview。

我现在使用LayoutParam来设置列表视图的高度。

设置适配器后是否还有其他默认方式显示所有元素？

谢谢。

header.xml

<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:orientation="vertical">

<TextView
    android:id="@+id/resourceHubTitleHeader"
    android:layout_width="match_parent"
    android:layout_height="wrap_content"
    android:background="@color/login"
    android:ellipsize="end"
    android:maxLines="1"
    android:padding="15dp"
    android:text="Franchisee Emails"
    android:textColor="@color/primaryColor"
    android:textStyle="bold" />

    </LinearLayout>

layout_list_item.xml

 <!--resource hub title/date-->
<LinearLayout
    android:layout_width="match_parent"
    android:layout_height="wrap_content"
    android:orientation="horizontal">

    <TextView
        android:id="@+id/resourceTitle"
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:layout_weight="1"
        android:ellipsize="end"
        android:maxLines="1"
        android:text="Franchisee Agreement"
        android:textColor="@color/primaryColor"
        android:textStyle="bold" />

    <LinearLayout
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_marginLeft="5dp"
        android:layout_marginRight="5dp"
        android:gravity="end"
        android:orientation="horizontal">

        <TextView
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"
            android:text="Date: "
            android:textColor="@color/primaryColor" />

        <TextView
            android:id="@+id/resourceDateUp"
            android:layout_width="match_parent"
            android:layout_height="wrap_content"
            android:text="DD/MMM/YYYY"
            android:textColor="@color/primaryColor" />
    </LinearLayout>

</LinearLayout>

ExpandableListView适配器：

public class ResHubExpandableListAdapter extends BaseExpandableListAdapter {

HashMap<String, ArrayList<String>> mResHubList;
ArrayList<String> mResHubHeaderList;
Context mContext;

public ResHubExpandableListAdapter(Context context, HashMap<String, ArrayList<String>> mResHubFiles
        , ArrayList<String> resHubHeader) {
    this.mResHubList = mResHubFiles;
    this.mResHubHeaderList = resHubHeader;
    this.mContext = context;
}

@Override
public int getGroupCount() {
    return mResHubHeaderList.size();
}

@Override
public int getChildrenCount(int groupPosition) {
    return mResHubList.get(mResHubHeaderList.get(groupPosition)).size();
}

@Override
public Object getGroup(int groupPosition) {
    return mResHubHeaderList.get(groupPosition);
}

@Override
public Object getChild(int groupPosition, int childPosition) {
    return mResHubList.get(mResHubHeaderList.get(groupPosition)).get(childPosition);
}

@Override
public long getGroupId(int groupPosition) {
    return groupPosition;
}

@Override
public long getChildId(int groupPosition, int childPosition) {
    return childPosition;
}

@Override
public boolean hasStableIds() {
    return false;
}

@Override
public View getGroupView(int groupPosition, boolean isExpanded, View convertView, ViewGroup parent) {
    View row = convertView;
    LayoutInflater inflater;
    String headerTitle = (String) getGroup(groupPosition);
    if (row == null || row.getTag() == null) {
        inflater = (LayoutInflater) mContext.getSystemService(Context.LAYOUT_INFLATER_SERVICE);
        row = inflater.inflate(R.layout.resource_hub_list_header, null);
        GeneralUtil.Log("rzenks getGroupView", "getGroupView at position: " + groupPosition);
    }
    TextView resourceHubTitleHeader = (TextView) row.findViewById(R.id.resourceHubTitleHeader);
    resourceHubTitleHeader.setText(headerTitle);

    return row;
}

@Override
public View getChildView(int groupPosition, int childPosition, boolean isLastChild, View convertView, ViewGroup parent) {
    View row = convertView;
    LayoutInflater inflater;
    final String childText = (String) getChild(groupPosition, childPosition);
    if (row == null || row.getTag() == null) {
        inflater = (LayoutInflater) mContext.getSystemService(Context.LAYOUT_INFLATER_SERVICE);
        row = inflater.inflate(R.layout.resource_hub_list_item, null);
        GeneralUtil.Log("rzenks getChildView", "getChildView at position: " + groupPosition);
    }
    TextView resourceTitle = (TextView) row.findViewById(R.id.resourceTitle);
    resourceTitle.setText(childText);

    return row;
}

@Override
public boolean isChildSelectable(int groupPosition, int childPosition) {
    return true;
}}

我的片段

public View onCreateView(LayoutInflater inflater, ViewGroup container,
                         Bundle savedInstanceState) {
    // Inflate the layout for this fragment
    View v = inflater.inflate(R.layout.fragment_home, container, false);

    //new tab addition
    mResourceHubMain = (LinearLayout) v.findViewById(R.id.resourceHubMain);
    mResHubExpandableListView = (ExpandableListView) v.findViewById(R.id.resHubExpandableListView);

    // New Tab list data view
    prepareExpandListData();
    mExpandableListAdapter = new ResHubExpandableListAdapter(getActivity(), resHubList, resHubHeaderList);
    mResHubExpandableListView.setAdapter(mExpandableListAdapter);
    }

遇到ExpandableListView问题。 listView没有填充片段

0 个答案: