ExpandableListView使用

最新推荐文章于 2025-08-07 14:12:26 发布

iteye_12837

最新推荐文章于 2025-08-07 14:12:26 发布

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文章标签：移动开发 java

本文详细介绍了如何在Android应用中自定义ExpandableListView组件，包括在Activity中使用该组件，以及如何定义group.xml和child.xml布局文件。此外，还展示了如何创建相应的Adapter来填充数据。

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1.自定义ExpandableListView

<ExpandableListView  
    android:id="@android:id/list"
    android:layout_width="fill_parent"
    android:layout_height="wrap_content"
    android:cacheColorHint="@android:color/transparent"
    android:listSelector="@android:color/transparent">
</ExpandableListView>

2.在Activity中使用ExpandableListView

ExpandableListView list = (ExpandableListView) findViewById(android.R.id.list);

3.定义group.xml

<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
    android:layout_width="fill_parent"
    android:layout_height="wrap_content"
    android:gravity="center"
    android:orientation="horizontal"
    android:background="@android:color/transparent"
    android:descendantFocusability="blocksDescendants">
	
    <ImageButton
        android:id="@+id/group_imagebutton"
        android:layout_width="50dp"
        android:layout_height="50dp" />
	<LinearLayout 
	    android:layout_width="wrap_content"
	    android:layout_height="wrap_content"
	    android:layout_marginLeft="20dp"
	    android:orientation="vertical">
	    <TextView
	        android:id="@+id/group_name"
	        android:layout_width="160dp"
	        android:layout_height="20dp"
	        android:textSize="16sp"/>
	    <TextView
	        android:id="@+id/group_dance"
	        android:layout_width="160dp"
	        android:layout_height="30dp"
	        android:textSize="14sp"/>
	</LinearLayout>>
   

</LinearLayout>

4.定义child.xml

<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
    android:layout_width="fill_parent"
    android:layout_height="wrap_content"
    android:orientation="vertical" 
    android:background="@android:color/transparent"
    <TextView
        android:id="@+id/child_nation"
        android:layout_width="fill_parent"
        android:layout_height="20dp"
        android:textSize="16sp"/>
    <TextView
        android:id="@+id/child_intro"
        android:layout_width="fill_parent"
        android:layout_height="wrap_content"
        android:textSize="14sp"/>
   

</LinearLayout>

5.创建adapter


import java.util.ArrayList;
import android.content.Context;
import android.content.Intent;
import android.view.LayoutInflater;
import android.view.View;
import android.view.View.OnClickListener;
import android.view.ViewGroup;
import android.widget.BaseExpandableListAdapter;
import android.widget.ImageView;
import android.widget.TextView;
public class TeacherListAdapter extends BaseExpandableListAdapter {
	private Context mContext = null;
	private ArrayList<TeacherBean> teacherContentList = null;

	public TeacherListAdapter(Context context) {
		this.mContext = context;
	}

	public Object getChild(int groupPosition, int childPosition) {
		return teacherContentList.get(groupPosition);
	}

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

	public int getChildrenCount(int groupPosition) {
		return 1;
	}

	public View getChildView(int groupPosition, int childPosition,
			boolean isLastChild, View convertView, ViewGroup parent) {
		TextView nation = null;
		TextView intro = null;
		if (convertView == null) {
			convertView = LayoutInflater.from(mContext).inflate(
					R.layout.child, null);
		}
		nation = (TextView) convertView.findViewById(R.id.child_nation);
		
		intro = (TextView) convertView.findViewById(R.id.child_intro);
		TeacherBean context = teacherContentList.get(groupPosition);
		nation.setText(context.getNation());
		intro.setText(context.getIntro());
		return convertView;
	}

	public Object getGroup(int groupPosition) {
		return teacherContentList.get(groupPosition);
	}

	public int getGroupCount() {
		return teacherContentList.size();
	}

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

	public View getGroupView(int groupPosition, boolean isExpanded,
			View convertView, ViewGroup parent) {
		ImageView image = null;
		TextView name = null;
		TextView dance = null;
		if (convertView == null) {
			convertView = LayoutInflater.from(mContext).inflate(
					R.layout.group, null);
		}
		image = (ImageView) convertView.findViewById(R.id.group_imagebutton);
		name = (TextView) convertView.findViewById(R.id.group_name);
		dance = (TextView) convertView.findViewById(R.id.group_dance);
		TeacherBean context = teacherContentList.get(groupPosition);
		name.setText(context.getName());
		dance.setText(context.getDance());
		image.setImageDrawable(context.getImage());		
		return convertView;
	}

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

	public boolean hasStableIds() {
		return true;
	}

}