我正在使用ExpandableListView
包含根据我获得的数据生成的组项和子项。现在我需要在每个生成的组的底部有一个按钮,其中有一个onClickListener,它调用一个函数,该函数必须知道该按钮所属的组。
将其添加到我的list_group.xml
布局文件中会在示例数据标题 -Header上添加按钮,并将其添加到我的list_item.xml
,将其添加到每个示例数据 -TextView元素。
这是我使用Android Studio的第一个项目,我一直试图解决这个问题。
以下是how the list looks like 的屏幕截图 我正在尝试添加按钮项目所在的按钮。
这是我用数据填充列表的功能:
private void prepareListData(ccyPair[] ccyPairs) {
listDataHeader = new ArrayList<String>();
listDataChild = new HashMap<String, List<String>>();
int counter = 0;
// Adding child data
for (ccyPair p : ccyPairs){
listDataHeader.add("Sample Data Title");
List<String> tempExpInfo = new ArrayList<String>();
tempExpInfo.add("Sample data");
tempExpInfo.add("Sample data");
tempExpInfo.add("Sample data");
tempExpInfo.add("Sample data");
tempExpInfo.add("Sample data");
tempExpInfo.add("Sample data");
tempExpInfo.add("BUTTON");
listDataChild.put(listDataHeader.get(counter), tempExpInfo);
counter++;
}
}
list_group.xml文件:
<?xml version="1.0" encoding="utf-8"?>
<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:app="http://schemas.android.com/apk/res-auto"
android:layout_width="fill_parent"
android:layout_height="wrap_content"
android:orientation="vertical"
android:padding="8dp"
android:background="@color/colorExpandableList">
<TextView
android:id="@+id/lblListHeader"
android:layout_width="fill_parent"
android:layout_height="wrap_content"
android:paddingLeft="?android:attr/expandableListPreferredItemPaddingLeft"
android:textSize="17dp"
android:paddingTop="10dp"
android:paddingBottom="10dp"
android:background="@color/colorExpandableList"
android:textColor="#2282c1"
android:layout_alignParentTop="true"/>
</RelativeLayout>
list_item.xml文件:
<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:app="http://schemas.android.com/apk/res-auto"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:background="@color/colorExpandableList"><![CDATA[
android:orientation="vertical" >
]]>
<TextView
android:id="@+id/lblListItem"
android:layout_width="fill_parent"
android:layout_height="wrap_content"
android:background="@color/colorExpandableList"
android:paddingBottom="5dp"
android:paddingLeft="?android:attr/expandableListPreferredChildPaddingLeft"
android:paddingTop="5dp"
android:textSize="17dip" />
</LinearLayout>
以及ExpandableListAdapter
public class ExpandableListAdapter extends BaseExpandableListAdapter {
private Context _context;
private List<String> _listDataHeader; // header titles
// child data in format of header title, child title
private HashMap<String, List<String>> _listDataChild;
public ExpandableListAdapter(Context context, List<String> listDataHeader, HashMap<String, List<String>> listChildData) {
this._context = context;
this._listDataHeader = listDataHeader;
this._listDataChild = listChildData;
}
@Override
public Object getChild(int groupPosition, int childPosititon) {
return this._listDataChild.get(this._listDataHeader.get(groupPosition))
.get(childPosititon);
}
@Override
public long getChildId(int groupPosition, int childPosition) {
return childPosition;
}
@Override
public View getChildView(int groupPosition, final int childPosition,
boolean isLastChild, View convertView, ViewGroup parent) {
final String childText = (String) getChild(groupPosition, childPosition);
if (convertView == null) {
LayoutInflater infalInflater = (LayoutInflater) this._context
.getSystemService(Context.LAYOUT_INFLATER_SERVICE);
convertView = infalInflater.inflate(R.layout.list_item, null);
}
TextView txtListChild = (TextView) convertView
.findViewById(R.id.lblListItem);
txtListChild.setText(childText);
return convertView;
}
@Override
public int getChildrenCount(int groupPosition) {
return this._listDataChild.get(this._listDataHeader.get(groupPosition))
.size();
}
@Override
public Object getGroup(int groupPosition) {
return this._listDataHeader.get(groupPosition);
}
@Override
public int getGroupCount() {
return this._listDataHeader.size();
}
@Override
public long getGroupId(int groupPosition) {
return groupPosition;
}
@Override
public View getGroupView(int groupPosition, boolean isExpanded, View convertView, ViewGroup parent) {
String headerTitle = (String) getGroup(groupPosition);
if (convertView == null) {
LayoutInflater infalInflater = (LayoutInflater) this._context
.getSystemService(Context.LAYOUT_INFLATER_SERVICE);
convertView = infalInflater.inflate(R.layout.list_group, null);
}
TextView lblListHeader = (TextView) convertView
.findViewById(R.id.lblListHeader);
lblListHeader.setTypeface(null, Typeface.BOLD);
lblListHeader.setText(headerTitle);
return convertView;
}
@Override
public boolean hasStableIds() {
return false;
}
@Override
public boolean isChildSelectable(int groupPosition, int childPosition) {
return true;
}
}
答案 0 :(得分:1)
getChildView()方法是你想看的地方
第一个选项:
在getChildView()方法中,您必须区分要扩展的视图。
if(isLastChild){
convertView = Inflater.inflate(R.layout.list_item_with_button, null);
} else {
convertView = Inflater.inflate(R.layout.list_item, null);
}
对于最后一个孩子,您创建一个包含按钮组件的list_item_with_button.xml。然后,您可以检查isLastChild布尔标志以扩充此新布局,以使按钮位于最后位置。
第二个选项:您可以编辑现有的list_item.xml并为其添加一个按钮,您可以在最后一个位置显示
View button = convertView.findViewById(R.id.myButton);
if(isLastChild){
v.setVisibility(View.VISIBLE);
} else {
v.setVisibility(View.GONE);
}