在ExpandableListView中显示图片需要以下几个步骤：
首先，确保你已经将所需的图片添加到项目的资源文件夹（res/drawable）中。
创建一个自定义的布局文件，例如list_item_image.xml，用于定义列表项的布局。在这个布局文件中，添加ImageView和其他需要的控件。例如：
<?xml version="1.0" encoding="utf-8"?> <LinearLayout xmlns:android="http://schemas.android.com/apk/res/android" android:layout_width="match_parent" android:layout_height="wrap_content" android:orientation="horizontal"> <ImageView android:id="@+id/imageView" android:layout_width="48dp" android:layout_height="48dp" android:src="@drawable/your_image" /> <TextView android:id="@+id/textView" android:layout_width="wrap_content" android:layout_height="wrap_content" android:layout_marginLeft="16dp" android:text="Your Text" /> </LinearLayout> 请确保将your_image替换为实际的图片资源名称。
public class ImageExpandableListAdapter extends BaseAdapter { private Context context; private List<String> groupHeaders; private List<List<String>> childItems; private int resource; public ImageExpandableListAdapter(Context context, List<String> groupHeaders, List<List<String>> childItems, int resource) { this.context = context; this.groupHeaders = groupHeaders; this.childItems = childItems; this.resource = resource; } @Override public int getGroupCount() { return groupHeaders.size(); } @Override public int getChildrenCount(int groupPosition) { return childItems.get(groupPosition).size(); } @Override public Object getGroup(int groupPosition) { return groupHeaders.get(groupPosition); } @Override public Object getChild(int groupPosition, int childPosition) { return childItems.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) { String headerTitle = (String) getGroup(groupPosition); if (convertView == null) { LayoutInflater inflater = (LayoutInflater) context.getSystemService(Context.LAYOUT_INFLATER_SERVICE); convertView = inflater.inflate(resource, null); } TextView textView = (TextView) convertView.findViewById(R.id.textView); textView.setText(headerTitle); return convertView; } @Override public View getChildView(int groupPosition, int childPosition, boolean isLastChild, View convertView, ViewGroup parent) { final String childText = (String) getChild(groupPosition, childPosition); if (convertView == null) { LayoutInflater inflater = (LayoutInflater) context.getSystemService(Context.LAYOUT_INFLATER_SERVICE); convertView = inflater.inflate(resource, null); } ImageView imageView = (ImageView) convertView.findViewById(R.id.imageView); imageView.setImageResource(R.drawable.your_image); // 设置图片资源 return convertView; } @Override public boolean isChildSelectable(int groupPosition, int childPosition) { return true; } } 请确保将your_image替换为实际的图片资源名称。
ExpandableListView expandableListView = findViewById(R.id.expandableListView); List<String> groupHeaders = new ArrayList<>(); List<List<String>> childItems = new ArrayList<>(); // 添加分组数据和子项数据 // ... ImageExpandableListAdapter adapter = new ImageExpandableListAdapter(this, groupHeaders, childItems, R.layout.list_item_image); expandableListView.setAdapter(adapter); 现在，你应该可以在ExpandableListView中看到图片了。如果需要根据数据动态更改图片，可以在适配器类的getView()方法中设置ImageView的图片资源。
