ExpandableListView的使用

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andriod ExpandableListView的使用

在iOS中UITableView被经常用到，当我们设置tableview的style为group的时候，它就以分组的形式呈现出来，同样的，在andriod中也有类似的UI控件：ExpandableListView。

下面来实现这样一个效果：
实例效果图

1、布局文件：

<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/list"        android:layout_width="fill_parent"        android:layout_height="fill_parent"        android:background="#ffffff"        android:cacheColorHint="#00000000"        android:listSelector="#00000000" >    </ExpandableListView></LinearLayout>

2、java文件

package com.example.expandablelistview2;import android.R.color;import android.support.v7.app.ActionBarActivity;import android.support.v7.app.ActionBar;import android.support.v4.app.Fragment;import android.os.Bundle;import android.view.Gravity;import android.view.LayoutInflater;import android.view.Menu;import android.view.MenuItem;import android.view.View;import android.view.ViewGroup;import android.view.Window;import android.widget.AbsListView;import android.widget.AbsListView.LayoutParams;import android.widget.AbsoluteLayout;import android.widget.BaseExpandableListAdapter;import android.widget.ExpandableListAdapter;import android.widget.ExpandableListView;import android.widget.Toast;import android.widget.ExpandableListView.OnChildClickListener;import android.widget.ImageView;import android.widget.LinearLayout;import android.widget.TextView;import android.os.Build;public class MainActivity extends ActionBarActivity {    @Override    protected void onCreate(Bundle savedInstanceState) {        super.onCreate(savedInstanceState);        requestWindowFeature(Window.FEATURE_NO_TITLE);        setContentView(R.layout.activity_main);        final ExpandableListAdapter adapter = new BaseExpandableListAdapter() {            // 设置组视图的图片            int[] logs = new int[]{R.drawable.wj,R.drawable.bmw,R.drawable.b};            // 设置组视图显示的文字            private String[] generalsTypes = new String[] {"奥迪","宝马","奔驰"};            // 子视图显示的文字            private String[][] generals = new String[][]{                    { "奥迪Q1", "奥迪Q2", "奥迪A3", "奥迪Q4", "奥迪Q5", "奥迪Q6" },                      { "宝马X1", "宝马X2", "宝马X3", "宝马X4", "宝马X5", "宝马X6" },                      { "奔驰E1", "奔驰S2", "奔驰S3", "奔驰S4", "奔驰S5" }            };            // 子视图的图片            public int[][] generallogos = new int[][]{                    { R.drawable.wj, R.drawable.wj,                            R.drawable.wj, R.drawable.wj,                            R.drawable.wj, R.drawable.wj },                      { R.drawable.bmw, R.drawable.bmw,                            R.drawable.bmw, R.drawable.bmw,                            R.drawable.bmw, R.drawable.bmw },                      { R.drawable.b, R.drawable.b, R.drawable.b,                            R.drawable.b, R.drawable.b }             };            // 获得文字的方法            TextView getTextView() {                AbsListView.LayoutParams lp = new AbsListView.LayoutParams(                          ViewGroup.LayoutParams.FILL_PARENT, 64);                  TextView textView = new TextView(                          MainActivity.this);                  textView.setLayoutParams(lp);                  textView.setGravity(Gravity.CENTER_VERTICAL);                  textView.setPadding(36, 0, 0, 0);                  textView.setTextSize(20);  //                textView.setTextColor(color.black);                  return textView;              }            // 重写ExpandableListAdapter方法            @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 arg0, boolean arg1, View arg2, ViewGroup arg3) {                // TODO Auto-generated method stub                // 代码创建ImageView                LinearLayout lineaLayout = new LinearLayout(MainActivity.this);                lineaLayout.setOrientation(0);                ImageView logo = new ImageView(MainActivity.this);                logo.setImageResource(logs[arg0]);                logo.setPadding(50, 15, 0, 0);                lineaLayout.addView(logo);                // 代码创建textView                TextView textView = getTextView();//              textView.setTextColor(color.black);                textView.setText(getGroup(arg0).toString());                lineaLayout.addView(textView);                return lineaLayout;            }            @Override            public long getGroupId(int arg0) {                // TODO Auto-generated method stub                return arg0;            }            @Override            public int getGroupCount() {                // TODO Auto-generated method stub                return generalsTypes.length;            }            @Override            public Object getGroup(int arg0) {                // TODO Auto-generated method stub                return generalsTypes[arg0];            }            @Override            public int getChildrenCount(int arg0) {                // TODO Auto-generated method stub                return generals[arg0].length;            }            @Override            public View getChildView(int arg0, int arg1, boolean arg2, View arg3,                    ViewGroup arg4) {                // TODO Auto-generated method stub                LinearLayout lineraLayout = new LinearLayout(MainActivity.this);                lineraLayout.setOrientation(0);                ImageView imageView = new ImageView(MainActivity.this);                imageView.setImageResource(generallogos[arg0][arg1]);                imageView.setPadding(10, 15, 0, 0);                lineraLayout.addView(imageView);                TextView textView = getTextView();                textView.setText(getChild(arg0, arg1).toString());                textView.setTextSize(15);                lineraLayout.addView(textView);                return lineraLayout;            }            @Override            public long getChildId(int arg0, int arg1) {                // TODO Auto-generated method stub                return arg1;            }            @Override            public Object getChild(int arg0, int arg1) {                // TODO Auto-generated method stub                return generals[arg0][arg1];            }        };        ExpandableListView expandableListView = (ExpandableListView)this.findViewById(R.id.list);        expandableListView.setAdapter(adapter);        expandableListView.setOnChildClickListener(new OnChildClickListener() {            @Override            public boolean onChildClick(ExpandableListView arg0, View arg1, int arg2,                    int arg3, long arg4) {                // TODO Auto-generated method stub                Toast.makeText(MainActivity.this, "你点击了" + adapter.getChild(arg2, arg3), 1).show();                return false;            }        });    }}

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