2.4.10 可展开的列表组件

<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"    android:layout_width="fill_parent"    android:layout_height="fill_parent"    android:orientation="vertical" >    <ExpandableListView        android:id="@+id/expandableListView1"        android:layout_width="match_parent"        android:layout_height="wrap_content" >    </ExpandableListView></LinearLayout>

package com.moon.hello2;import java.util.ArrayList;import java.util.Calendar;import java.util.HashMap;import java.util.List;import java.util.Map;import android.R.anim;import android.R.integer;import android.app.Activity;import android.database.DataSetObserver;import android.os.Bundle;import android.os.Handler;import android.os.Message;import android.view.Gravity;import android.view.Menu;import android.view.View;import android.view.ViewGroup;import android.view.View.OnClickListener;import android.widget.AbsListView;import android.widget.ArrayAdapter;import android.widget.AutoCompleteTextView;import android.widget.Button;import android.widget.DatePicker;import android.widget.ExpandableListAdapter;import android.widget.ExpandableListView;import android.widget.ImageView;import android.widget.LinearLayout;import android.widget.ListView;import android.widget.ProgressBar;import android.widget.RatingBar;import android.widget.SimpleAdapter;import android.widget.RatingBar.OnRatingBarChangeListener;import android.widget.SeekBar;import android.widget.DatePicker.OnDateChangedListener;import android.widget.SeekBar.OnSeekBarChangeListener;import android.widget.TabHost;import android.widget.TextView;import android.widget.TimePicker;import android.widget.TimePicker.OnTimeChangedListener;public class MainActivity extends Activity {    @Override    protected void onCreate(Bundle savedInstanceState) {        super.onCreate(savedInstanceState);        this.setContentView(R.layout.activity_main);        ExpandableListView listView = (ExpandableListView)findViewById(R.id.expandableListView1);        ExpandableListAdapter adapter = new ExpandableListAdapter() {            private String[] armTypeStrings = new String[]{"神族","人族","虫族"};            private String[][] armStrings = new String[][]{{"狂战士","龙骑士","黑暗圣堂","电兵"},{"小狗","刺蛇","飞龙","自爆飞机"},{"机枪兵","护士MM","幽灵"}};            @Override            public void unregisterDataSetObserver(DataSetObserver arg0) {                // TODO Auto-generated method stub                            }                        @Override            public void registerDataSetObserver(DataSetObserver arg0) {                // TODO Auto-generated method stub                            }                        @Override            public void onGroupExpanded(int arg0) {                // TODO Auto-generated method stub                            }                        @Override            public void onGroupCollapsed(int arg0) {                // TODO Auto-generated method stub                            }                        @Override            public boolean isEmpty() {                // TODO Auto-generated method stub                return false;            }                        @Override            public boolean isChildSelectable(int arg0, int arg1) {                // TODO Auto-generated method stub                return true;            }                        @Override            public boolean hasStableIds() {                // TODO Auto-generated method stub                return true;            }                        @Override            public View getGroupView(int groupPosition, boolean arg1, View arg2, ViewGroup arg3) {                // TODO Auto-generated method stub                LinearLayout linearLayout = new LinearLayout(MainActivity.this);                linearLayout.setOrientation(LinearLayout.HORIZONTAL);                TextView textView = this.getTextView();                textView.setText(this.getGroup(groupPosition).toString());                linearLayout.addView(textView);                return linearLayout;            }                        @Override            public long getGroupId(int groupPosition) {                // TODO Auto-generated method stub                return groupPosition;            }                        @Override            public int getGroupCount() {                // TODO Auto-generated method stub                return this.armTypeStrings.length;            }                        @Override            public Object getGroup(int groupPosition) {                // TODO Auto-generated method stub                return this.armTypeStrings[groupPosition];            }                        @Override            public long getCombinedGroupId(long arg0) {                // TODO Auto-generated method stub                return 0;            }                        @Override            public long getCombinedChildId(long arg0, long arg1) {                // TODO Auto-generated method stub                return 0;            }                        @Override            public int getChildrenCount(int groupPosition) {                // TODO Auto-generated method stub                return this.armStrings[groupPosition].length;            }                        @Override            public View getChildView(int groupPosition, int childPosition, boolean isLastChild, View convertView,                    ViewGroup parent) {                TextView textView = this.getTextView();                textView.setText(this.getChild(groupPosition, childPosition).toString());                return textView;            }                        @Override            public long getChildId(int arg0, int arg1) {                // TODO Auto-generated method stub                return 0;            }                        @Override            public Object getChild(int groupPostion, int childPosition) {                // TODO Auto-generated method stub                return this.armStrings[groupPostion][childPosition];            }                        @Override            public boolean areAllItemsEnabled() {                // TODO Auto-generated method stub                return false;            }                        private TextView getTextView(){                TextView textView = new TextView(MainActivity.this);                AbsListView.LayoutParams layoutParams = new AbsListView.LayoutParams(ViewGroup.LayoutParams.MATCH_PARENT, 64);                textView.setLayoutParams(layoutParams);                textView.setGravity(Gravity.CENTER_VERTICAL);                textView.setPadding(36, 0, 0, 0);                textView.setTextSize(20);                return textView;            }        };        listView.setAdapter(adapter);    }    @Override    public boolean onCreateOptionsMenu(Menu menu) {        getMenuInflater().inflate(R.menu.main, menu);        return true;    }}

getChildView 返回子列表中的单个view

getGroupView 返回单个group的view(不展开时候的那个)

childCount 返回某个group下边的子元素数目

groupCount 返回所有的group数目

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