android的ExpandableListView _Expandable

归志宁无五亩园，读书本意在元元。这篇文章主要讲述android的ExpandableListView相关的知识，希望能为你提供帮助。
activity_main.xml

< RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android" xmlns:tools="http://schemas.android.com/tools" android:layout_width="match_parent" android:layout_height="match_parent" android:paddingBottom="@dimen/activity_vertical_margin" android:paddingLeft="@dimen/activity_horizontal_margin" android:paddingRight="@dimen/activity_horizontal_margin" android:paddingTop="@dimen/activity_vertical_margin" tools:context="com.example.expandablelistview.MainActivity" > < ExpandableListView android:id="@+id/ExpandableListView1_1" android:layout_width="match_parent" android:layout_height="wrap_content" android:layout_alignParentLeft="true" android:layout_alignParentTop="true" android:groupIndicator="@null" > < /ExpandableListView> < /RelativeLayout> < !-- android:groupIndicator="@null"去掉自带的箭头图标 -->

group_item.xml

< ?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/imageViewgroup_1" android:layout_width="wrap_content" android:layout_height="wrap_content" android:src="https://www.songbingjia.com/android/@drawable/ic_launcher" /> < TextView android:id="@+id/textViewgroup_1" android:layout_width="wrap_content" android:layout_height="wrap_content" /> < /LinearLayout>

child_item.xml

< ?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/imageViewchild_1" android:layout_width="wrap_content" android:layout_height="wrap_content" android:src="https://www.songbingjia.com/android/@drawable/ic_launcher" android:padding="10dp" /> < TextView android:id="@+id/textViewchild_1" android:layout_width="wrap_content" android:layout_height="wrap_content" android:text="sdfds" android:padding="10dp" /> < /LinearLayout>

MainActivity

package com.example.expandablelistview; import android.app.Activity; import android.os.Bundle; import android.view.Menu; import android.view.MenuItem; import android.view.View; import android.view.ViewGroup; import android.widget.BaseExpandableListAdapter; import android.widget.ExpandableListView; import android.widget.ImageView; import android.widget.TextView; public class MainActivity extends Activity { private ExpandableListView expandableListView; @Override protected void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); setContentView(R.layout.activity_main); expandableListView=(ExpandableListView) findViewById(R.id.ExpandableListView1_1); expandableListView.setAdapter(new MyExpandableListAdapter()); } @Override public boolean onCreateOptionsMenu(Menu menu) { // Inflate the menu; this adds items to the action bar if it is present. getMenuInflater().inflate(R.menu.main, menu); return true; } @Override public boolean onOptionsItemSelected(MenuItem item) { // Handle action bar item clicks here. The action bar will // automatically handle clicks on the Home/Up button, so long // as you specify a parent activity in AndroidManifest.xml. int id = item.getItemId(); if (id == R.id.action_settings) { return true; } return super.onOptionsItemSelected(item); } class MyExpandableListAdapter extends BaseExpandableListAdapter{ private String[] skills = new String[]{ "WORD", "EXCEL", "EMAIL", "PPT" }; private String[][] groups = new String[][]{ {"文档编辑", "文档排版", "文档处理", "文档打印"}, {"表格编辑", "表格排版", "表格处理", "表格打印"}, {"收发邮件", "管理邮箱", "登录登出", "注册绑定"}, {"演示编辑", "演示排版", "演示处理", "演示打印"}, }; @Override public int getGroupCount() { // TODO Auto-generated method stub return skills.length; } //二级列表的数量 @Override public int getChildrenCount(int groupPosition) { // TODO Auto-generated method stub return groups[groupPosition].length; } //返回每一组的对象 @Override public Object getGroup(int groupPosition) { // TODO Auto-generated method stub return skills[groupPosition]; } //返回每组中的列表项 @Override public Object getChild(int groupPosition, int childPosition) { // TODO Auto-generated method stub return groups[groupPosition][childPosition]; }@Override public long getGroupId(int groupPosition) { // TODO Auto-generated method stub return groupPosition; }@Override public long getChildId(int groupPosition, int childPosition) { // TODO Auto-generated method stub return childPosition; }@Override public boolean hasStableIds() { // TODO Auto-generated method stub return true; }@Override public View getGroupView(int groupPosition, boolean isExpanded, View convertView, ViewGroup parent) { // TODO Auto-generated method stub if(convertView==null){ convertView=getLayoutInflater().inflate(R.layout.group_item, null); } ImageView imageView=(ImageView) convertView.findViewById(R.id.imageViewgroup_1); TextView textView=(TextView) convertView.findViewById(R.id.textViewgroup_1); imageView.setImageResource(R.drawable.ic_launcher); textView.setText(skills[groupPosition]); return convertView; }@Override public View getChildView(int groupPosition, int childPosition, boolean isLastChild, View convertView, ViewGroup parent) { // TODO Auto-generated method stub if(convertView==null){ convertView=getLayoutInflater().inflate(R.layout.child_item, null); ImageView imageView=(ImageView) convertView.findViewById(R.id.imageViewchild_1); TextView textView=(TextView) convertView.findViewById(R.id.textViewchild_1); imageView.setImageResource(R.drawable.ic_launcher); textView.setText(groups[groupPosition][childPosition]); } return convertView; }@Override public boolean isChildSelectable(int groupPosition, int childPosition) { // TODO Auto-generated method stub return true; } } }