android中expandablelistview的学习

android中经常需要用到expanablelistview，今天学习了expandablelistview，并附上源码

  首先定义parent布局的xml文件expandable_parent_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="match_parent"    android:orientation="horizontal"    android:gravity="center" >    <ImageView     android:id="@+id/imageid"    android:layout_width="0dp"    android:layout_height="wrap_content"    android:layout_weight="1"    /><TextView     android:id="@+id/textid"    android:layout_width="0dp"    android:layout_height="wrap_content"    android:layout_weight="4"    android:gravity="center"    /></LinearLayout>

child的布局文件如下，比较简单，只包含一个TextView，expandalbe_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="match_parent"     >    <TextView     android:id="@+id/textid"    android:layout_width="match_parent"    android:layout_height="wrap_content"    /></LinearLayout>

在实现自定义的adapter，继承自BaseExpandableListAdapter，，，，MyExpandableAdapter.java如下：

package com.example.expandablelistview;import android.content.Context;import android.view.LayoutInflater;import android.view.View;import android.view.ViewGroup;import android.widget.BaseExpandableListAdapter;import android.widget.ImageView;import android.widget.TextView;public class MyExpandableAdapter extends BaseExpandableListAdapter {private Context context;private String [][]child = new String[][]{{"firstone","firsttwo","firstthree","firstfour"},{"secondone","secondtwo","secondthree","secondfour"},{"thirdone","thirdtwo","thirdthree"}};private int[]images = new int[]{R.drawable.ic_launcher,R.drawable.ic_launcher,R.drawable.ic_launcher};private String[]parent = new String[]{"parentone","parenttwo","parentthree"};public MyExpandableAdapter(Context context) {super();this.context = context;}@Overridepublic Object getChild(int arg0, int arg1) {// TODO Auto-generated method stubreturn child[arg0][arg1];}@Overridepublic long getChildId(int arg0, int arg1) {// TODO Auto-generated method stubreturn arg1;}@Overridepublic View getChildView(int arg0, int arg1, boolean arg2, View arg3,ViewGroup arg4) {// TODO Auto-generated method stubView view = LayoutInflater.from(context).inflate(R.layout.expandalbe_child_item,null);TextView textView = (TextView) view.findViewById(R.id.textid);textView.setText(child[arg0][arg1]);return view;}@Overridepublic int getChildrenCount(int arg0) {// TODO Auto-generated method stubreturn child[arg0].length;}@Overridepublic Object getGroup(int arg0) {// TODO Auto-generated method stubreturn parent[arg0];}@Overridepublic int getGroupCount() {// TODO Auto-generated method stubreturn parent.length;}@Overridepublic long getGroupId(int arg0) {// TODO Auto-generated method stubreturn arg0;}@Overridepublic View getGroupView(int arg0, boolean arg1, View arg2, ViewGroup arg3) {// TODO Auto-generated method stubView view = LayoutInflater.from(context).inflate(R.layout.expandable_parent_item,null);ImageView imageView = (ImageView) view.findViewById(R.id.imageid);TextView textView = (TextView) view.findViewById(R.id.textid);imageView.setImageResource(images[arg0]);textView.setText(parent[arg0]);return view;<pre name="code" class="java">package com.example.expandablelistview;import android.os.Bundle;import android.app.Activity;import android.view.Menu;import android.widget.ExpandableListView;public class MainActivity extends Activity {@Overrideprotected void onCreate(Bundle savedInstanceState) {super.onCreate(savedInstanceState);setContentView(R.layout.activity_main);ExpandableListView listView = (ExpandableListView) findViewById(R.id.expandlistid);MyExpandableAdapter adapter = new MyExpandableAdapter(this);listView.setAdapter(adapter);}@Overridepublic 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;}}

}@Overridepublic boolean hasStableIds() {// TODO Auto-generated method stubreturn false;}@Overridepublic boolean isChildSelectable(int arg0, int arg1) {// TODO Auto-generated method stubreturn false;}}

最后，MainActivity.java如下；

package com.example.expandablelistview;import android.os.Bundle;import android.app.Activity;import android.view.Menu;import android.widget.ExpandableListView;public class MainActivity extends Activity {@Overrideprotected void onCreate(Bundle savedInstanceState) {super.onCreate(savedInstanceState);setContentView(R.layout.activity_main);ExpandableListView listView = (ExpandableListView) findViewById(R.id.expandlistid);MyExpandableAdapter adapter = new MyExpandableAdapter(this);listView.setAdapter(adapter);}@Overridepublic 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;}}

源码下载链接：http://download.csdn.net/detail/mockingbirds/8052699