BaseExpandableListAdapter的用法

BaseExpandableListAdapter的用法

 

<?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="vertical" >

    <ExpandableListView 
        android:layout_width="fill_parent"
        android:layout_height="wrap_content"
        android:id="@+id/ecpandable"
        />

</LinearLayout>

 

package cn.csdn.activity;

import android.app.Activity;
import android.os.Bundle;
import android.view.View;
import android.view.ViewGroup;
import android.widget.AbsListView;
import android.widget.BaseExpandableListAdapter;
import android.widget.ExpandableListAdapter;
import android.widget.ExpandableListView;
import android.widget.ImageView;
import android.widget.LinearLayout;
import android.widget.TextView;

public class ExpandableListViewActivity extends Activity{

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        // TODO Auto-generated method stub
        super.onCreate(savedInstanceState);
        setContentView(R.layout.expandable_layout);
        
        /**BaseExpandableListAdapter實現了ExpandableListAdapter*/
        ExpandableListAdapter adapter = new BaseExpandableListAdapter(){

/**----------定義數組-------------------------------------------------------------------*/
            private int[] images = new int[]{
                    R.drawable.ic_launcher,
                    R.drawable.stop,
                    R.drawable.play
            };
            private String[] armTypes = new String[]{
                    "神族","蟲族","人族"
            };
            private String[][] arms = new String[][]{
                    {"狂戰士","龍騎士","黑暗聖堂"},
                    {"小狗","飛龍","自爆妃子"},
                    {"步兵","傘兵","護士mm"}
            };
                        
/*===========組元素表示可摺疊的列表項，子元素表示列表項展開後看到的多個子元素項=============*/

/**----------得到armTypes和arms中每一個元素的ID-------------------------------------------*/
            
            //獲取組在給定的位置編號，即armTypes中元素的ID
            @Override
            public long getGroupId(int groupPosition) {
                return groupPosition;
            }
        
            //獲取在給定的組的兒童的ID，就是arms中元素的ID
            @Override
            public long getChildId(int groupPosition, int childPosition) {
                return childPosition;
            }
            
/**----------根據上面得到的ID的值，來得到armTypes和arms中元素的個數 ------------------------*/
            
            //獲取的羣體數量，得到armTypes裏元素的個數
            @Override
            public int getGroupCount() {
                return armTypes.length;
            }
            
            //取得指定組中的兒童人數，就是armTypes中每一個種族它軍種的個數
            @Override
            public int getChildrenCount(int groupPosition) {
                return arms[groupPosition].length;
            }
            
/**----------利用上面getGroupId得到ID，從而根據ID得到armTypes中的數據，並填到TextView中 -----*/
            
            //獲取與給定的組相關的數據，得到數組armTypes中元素的數據
            @Override
            public Object getGroup(int groupPosition) {
                return armTypes[groupPosition];
            }

            //獲取一個視圖顯示給定組，存放armTypes
            @Override
            public View getGroupView(int groupPosition, boolean isExpanded,
                    View convertView, ViewGroup parent) {
                TextView textView = getTextView();//調用定義的getTextView()方法
                textView.setText(getGroup(groupPosition).toString());//添加數據
                return textView;
            }

/**----------利用上面getChildId得到ID，從而根據ID得到arms中的數據，並填到TextView中---------*/
            
            //獲取與孩子在給定的組相關的數據,得到數組arms中元素的數據
            @Override
            public Object getChild(int groupPosition, int childPosition) {
                return arms[groupPosition][childPosition];
            }
            
            //獲取一個視圖顯示在給定的組 的兒童的數據，就是存放arms
            @Override
            public View getChildView(int groupPosition, int childPosition, boolean isLastChild,
                    View convertView, ViewGroup parent) {
                LinearLayout ll = new LinearLayout(ExpandableListViewActivity.this);
                ll.setOrientation(0);//定義爲縱向排列
                ImageView logo = new ImageView(ExpandableListViewActivity.this);
                logo.setImageResource(images[groupPosition]);//添加圖片
                ll.addView(logo);
                TextView textView = getTextView();//調用定義的getTextView()方法
                textView.setText(getChild(groupPosition,childPosition).toString());//添加數據
                ll.addView(textView);
                return ll;
            }
            
/**------------------自定義一個設定TextView屬性的方法----------------------------------------------*/
            
            //定義一個TextView
            private TextView getTextView(){
                AbsListView.LayoutParams lp = new AbsListView.LayoutParams(ViewGroup.LayoutParams.FILL_PARENT,40);
                TextView textView = new TextView(ExpandableListViewActivity.this);
                textView.setLayoutParams(lp);
                textView.setPadding(36, 0, 0, 0);
                textView.setTextSize(20);
                return textView;
            }
            
/**-------------------其他設置-------------------------------------------------------------------*/
            
            //孩子在指定的位置是可選的，即：arms中的元素是可點擊的
            @Override
            public boolean isChildSelectable(int groupPosition,
                    int childPosition) {
                return true;
            }

            //表示孩子是否和組ID是跨基礎數據的更改穩定
            public boolean hasStableIds() {
                return true;
            }
        };
            
            /**使用適配器*/
            ExpandableListView expandListView = (ExpandableListView) this.findViewById(R.id.ecpandable);
            expandListView.setAdapter(adapter);
    }

    
}

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