由于这个模块内容较多,篇幅较长，请耐心阅读。
习题模块分为两个部分
- [x] 习题列表界面
- [x] 习题详情界面
一、习题列表界面
1、习题界面
（1）、创建习题界面
在res/layout文件夹中，新建一个布局文件，命名为main_view_exercises。
（2）、导入界面图片
将习题界面所需图片 exercises_bg_1.png、exercises_bg_2.png、exercises_bg_3.png、exercises_bg_4.png导入drawable文件夹中。
（3）、习题界面代码main_view_exercises.xml
<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:orientation="vertical"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:background="@android:color/white">
<ListView
android:id="@+id/lv_list"
android:layout_width="fill_parent"
android:layout_height="fill_parent"
android:layout_marginBottom="55dp"
android:divider="#E4E4E4"
android:dividerHeight="1dp"/>
</LinearLayout>
2、习题界面Item
由于习题界面使用了ListView控件，所以需要创建一个Item界面。在res/layout文件夹中，新建一个布局文件，命名为exercises_list_item。代码如下：
<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:orientation="horizontal"
android:layout_width="fill_parent"
android:layout_height="wrap_content"
android:background="@android:color/white"
android:paddingBottom="15dp"
android:paddingLeft="10dp"
android:paddingRight="10dp"
android:paddingTop="15dp">
<TextView
android:id="@+id/tv_order"
android:layout_width="40dp"
android:layout_height="40dp"
android:layout_gravity="center_vertical"
android:layout_marginLeft="10dp"
android:background="@drawable/exercises_bg_1"
android:gravity="center"
android:textColor="@android:color/white"
android:textSize="16sp"/>
<LinearLayout
android:layout_width="fill_parent"
android:layout_height="fill_parent"
android:layout_marginLeft="15dp"
android:gravity="center_vertical"
android:orientation="vertical">
<TextView
android:id="@+id/tv_title"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:singleLine="true"
android:textColor="#000000"
android:textSize="14sp"/>
<TextView
android:id="@+id/tv_content"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_marginTop="2dp"
android:singleLine="true"
android:textColor="#a3a3a3"
android:textSize="12sp"/>
</LinearLayout>
</LinearLayout>
3、创建ExerciseBean类
在com.bocuegu.bean包中新建一个java类，命名为ExerciseBean。用来创建习题所有的属性。代码如下：
package com.boxuegu.bean;
public class ExercisesBean {
public int id; //每章习题ID
public String title; //每章习题标题
public String content; //每章习题的数目
public int background; //每章习题前边的序列背景
public int subjectId; //每道习题的ID
public String subject; //每道习题的题干
public String a; //每道习题的A选项
public String b; //每道习题的B选项
public String c; //每道习题的C选项
public String d; //每道习题的D选项
public int answer; //每道习题的正确答案
/*
* select为 0,1,2,3,4，的含义：
* 0时表示所选选项是对的
* 1表示选项中的A是错误的
* 2表示选项中的B是错误的
* 3表示选项中的C是错误的
* 4表示选项中的D是错误的
*/
public int select;
}
4、习题界面Adapter
选择com.boxuegu包，创建adapter包。在adapter包中创建一个Java类，命名为ExercisesAdapter。由于ExercisesAdapter类继承自BaseAdapter类，所以要修改主类，代码如下：
package com.boxuegu.adapter;
import android.content.Context;
import android.content.Intent;
import com.boxuegu.R;
import com.boxuegu.activity.ExercisesDetailActivity;
import com.boxuegu.bean.ExercisesBean;
import android.view.LayoutInflater;
import android.view.View;
import android.view.ViewGroup;
import android.widget.BaseAdapter;
import android.widget.TextView;
import java.util.List;
//ExercisesAdapter类继承自BaseAdapter类
public class ExercisesAdapter extends BaseAdapter {
private Context mContext;
private List<ExercisesBean> ebl;
public ExercisesAdapter(Context context){
this.mContext = context;
}
//设置数据更新界面
public void setData(List<ExercisesBean> ebl){
this.ebl = ebl;
notifyDataSetChanged();
}
//获取Item的总数
@Override
public int getCount() {
return ebl == null?0:ebl.size();
}
//根据position得到对应Item的对象
@Override
public ExercisesBean getItem(int position) {
return ebl == null ? null : ebl.get(position);
}
//根据position得到对应Item的ID
@Override
public long getItemId(int position) {
return position;
}
//根据position得到对应Item的视图，position是当前Item的位置
@Override
public View getView(int position, View convertView, ViewGroup parent) {
final ViewHolder vh;
//复用convertView
if (convertView == null){
vh = new ViewHolder();
convertView = LayoutInflater.from(mContext).inflate(R.layout.exercises_list_item,null);
vh.title = (TextView) convertView.findViewById(R.id.tv_title);
vh.content = (TextView) convertView.findViewById(R.id.tv_content);
vh.order = (TextView) convertView.findViewById(R.id.tv_order);
convertView.setTag(vh);
}else {
vh = (ViewHolder) convertView.getTag();
}
//获取position对应的Item的数据对象
final ExercisesBean bean = getItem(position);
if (bean != null){
vh.order.setText(position + 1 + "");
vh.title.setText(bean.title);
vh.content.setText(bean.content);
vh.order.setBackgroundResource(bean.background);
}
//每个Item的点击事件
convertView.setOnClickListener(new View.OnClickListener(){
@Override
public void onClick(View v){
if (bean == null)
return;
//跳转到习题详情界面 后面添加
Intent intent = new Intent(mContext, ExercisesDetailActivity.class);
intent.putExtra("id",bean.id);
intent.putExtra("title",bean.title);
mContext.startActivity(intent);
}
});
return convertView;
}
class ViewHolder{
public TextView title,content;
public TextView order;
}
}
5、习题界面逻辑代码
在com.boxuegu.view包中创建一个ExercisesView的Java类。
package com.boxuegu.view;
import android.app.Activity;
import com.boxuegu.R;
import com.boxuegu.adapter.ExercisesAdapter;
import com.boxuegu.bean.ExercisesBean;
import android.view.LayoutInflater;
import android.view.View;
import android.widget.ListView;
import java.util.ArrayList;
import java.util.List;
public class ExercisesView {
private ListView lv_list;
private ExercisesAdapter adapter;
private List<ExercisesBean> ebl;
private Activity mContext;
private LayoutInflater mInflater;
private View mCurrentView;
public ExercisesView(Activity context){
mContext = context;
mInflater = LayoutInflater.from(mContext);
}
private void createView(){
initView();
}
private void initView(){
mCurrentView = mInflater.inflate(R.layout.main_view_exercises,null);
lv_list = (ListView) mCurrentView.findViewById(R.id.lv_list);
adapter = new ExercisesAdapter(mContext);
initData();
adapter.setData(ebl);
lv_list.setAdapter(adapter);
}
//设置数据
private void initData(){
ebl = new ArrayList<ExercisesBean>();
for (int i=0;i<10;i++){
ExercisesBean bean = new ExercisesBean();
bean.id = (i+1);
switch (i){
case 0:
bean.title = "第1章 博客(网站)简介";
bean.content="共计5题";
bean.background=(R.drawable.exercises_bg_1);
break;
case 1:
bean.title = "第2章 认识WordPress";
bean.content="共计5题";
bean.background=(R.drawable.exercises_bg_2);
break;
case 2:
bean.title = "第3章 WordPress基础";
bean.content="共计5题";
bean.background=(R.drawable.exercises_bg_3);
break;
case 3:
bean.title = "第4章 熟悉Linux系统";
bean.content="共计5题";
bean.background=(R.drawable.exercises_bg_4);
break;
case 4:
bean.title = "第5章 PHP基本语法";
bean.content="共计5题";
bean.background=(R.drawable.exercises_bg_1);
break;
case 5:
bean.title = "第6章 MySQL数据库";
bean.content="共计5题";
bean.background=(R.drawable.exercises_bg_2);
break;
case 6:
bean.title = "第7章 Nginx服务器";
bean.content="共计5题";
bean.background=(R.drawable.exercises_bg_3);
break;
case 7:
bean.title = "第8章 云服务器简介";
bean.content="共计5题";
bean.background=(R.drawable.exercises_bg_4);
break;
case 8:
bean.title = "第9章 环境搭建过程";
bean.content="共计5题";
bean.background=(R.drawable.exercises_bg_1);
break;
case 9:
bean.title = "第10章 WordPress主题";
bean.content="共计5题";
bean.background=(R.drawable.exercises_bg_2);
break;
default:
break;
}
ebl.add(bean);
}
}
//获取当前在导航栏上方显示对应的view
public View getView(){
if (mCurrentView == null){
createView();
}
return mCurrentView;
}
//显示当前导航栏上方所对应的view界面
public void showView(){
if (mCurrentView == null) {
createView();
}
mCurrentView.setVisibility(View.VISIBLE);
}
}
6、修改底部导航栏代码
因为习题界面是通过底部导航栏进行跳转的，找到MainActivity.java文件的private RelativeLayout rl_title_bar;，在下方添加：
private ExercisesView mExerciseView;
找到MainActivity.java文件的createView()方法，在注释//习题界面下方添加如下代码：
if (mExerciseView == null){
mExerciseView = new ExercisesView(this);
mBodyLayout.addView(mExerciseView.getView());
}else{
mExerciseView.getView();
}
mExerciseView.showView();
二、习题详情界面
1、创建界面
（1）、创建习题详情界面
在com.boxuegu.activity中创建一个Java类，命名为ExercisesDetailActivity。在res/layout文件夹下创建一个布局文件，命名为activity_exercises_detail。
（2）、导入界面图片 exercises_a.png、exercises_b.png、exercises_c.png、exercises_d.png、exercises_error_icon.png、exercises_right_icon.png。
（3）、界面代码activity_exercises_detail.xml
<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:orientation="vertical"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:background="@android:color/white">
<include layout="@layout/main_title_bar" />
<TextView
android:layout_width="fill_parent"
android:layout_height="wrap_content"
android:layout_marginLeft="10dp"
android:layout_marginTop="15dp"
android:text="一、选择题"
android:textColor="#000000"
android:textSize="16sp"
android:textStyle="bold"
android:visibility="gone"/>
<ListView
android:layout_width="fill_parent"
android:layout_height="fill_parent"
android:id="@+id/lv_list"
android:divider="@null"/>
</LinearLayout>
2、习题详情界面Item
在res/layout文件夹中创建一个布局文件，命名为exercises_detail_list_item。代码如下：
<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:orientation="vertical"
android:layout_width="fill_parent"
android:layout_height="fill_parent"
android:background="@android:color/white"
android:padding="15dp">
<TextView
android:id="@+id/tv_subject"
android:layout_width="fill_parent"
android:layout_height="wrap_content"
android:lineSpacingMultiplier="1.5"
android:textColor="#000000"
android:textSize="14sp"/>
<LinearLayout
android:layout_width="fill_parent"
android:layout_height="wrap_content"
android:layout_marginTop="15dp"
android:orientation="horizontal">
<ImageView
android:id="@+id/iv_a"
android:layout_width="35dp"
android:layout_height="35dp"
android:src="@drawable/exercises_a"/>
<TextView
android:id="@+id/tv_a"
android:layout_width="fill_parent"
android:layout_height="wrap_content"
android:layout_gravity="center_vertical"
android:layout_marginLeft="8dp"
android:lineSpacingMultiplier="1.5"
android:textColor="#000000"
android:textSize="12sp"/>
</LinearLayout>
<LinearLayout
android:layout_width="fill_parent"
android:layout_height="wrap_content"
android:layout_marginTop="15dp"
android:orientation="horizontal">
<ImageView
android:id="@+id/iv_b"
android:layout_width="35dp"
android:layout_height="35dp"
android:src="@drawable/exercises_b"/>
<TextView
android:id="@+id/tv_b"
android:layout_width="fill_parent"
android:layout_height="wrap_content"
android:layout_gravity="center_vertical"
android:layout_marginLeft="8dp"
android:lineSpacingMultiplier="1.5"
android:textColor="#000000"
android:textSize="12sp"/>
</LinearLayout>
<LinearLayout
android:layout_width="fill_parent"
android:layout_height="wrap_content"
android:layout_marginTop="15dp"
android:orientation="horizontal">
<ImageView
android:id="@+id/iv_c"
android:layout_width="35dp"
android:layout_height="35dp"
android:src="@drawable/exercises_c"/>
<TextView
android:id="@+id/tv_c"
android:layout_width="fill_parent"
android:layout_height="wrap_content"
android:layout_gravity="center_vertical"
android:layout_marginLeft="8dp"
android:lineSpacingMultiplier="1.5"
android:textColor="#000000"
android:textSize="12sp"/>
</LinearLayout>
<LinearLayout
android:layout_width="fill_parent"
android:layout_height="wrap_content"
android:layout_marginTop="15dp"
android:orientation="horizontal">
<ImageView
android:id="@+id/iv_d"
android:layout_width="35dp"
android:layout_height="35dp"
android:src="@drawable/exercises_d"/>
<TextView
android:id="@+id/tv_d"
android:layout_width="fill_parent"
android:layout_height="wrap_content"
android:layout_gravity="center_vertical"
android:layout_marginLeft="8dp"
android:lineSpacingMultiplier="1.5"
android:textColor="#000000"
android:textSize="12sp"/>
</LinearLayout>
</LinearLayout>
3、习题数据的存放
（1）、如果没有assets文件夹则创建一个。
（2）、在assets文件夹下创建xml文件用来存放习题内容。
因为有10个章节的内容，所以要创建10个xml文件。这里演示一个，其余9个依次类推。注意，这里创建的是xml文件，不是android xml文件。
<?xml version="1.0" encoding="UTF-8"?>
<infos>
<exercises id="1">
<subject>1.下列哪个选项属于一个网站（）。</subject>
<a>百度APP</a>
<b>腾讯网</b>
<c>谷歌浏览器</c>
<d>Eclipse</d>
<answer>2</answer>
</exercises>
<exercises id="2">
<subject>2.个人博客的英文简称（）。</subject>
<a>Eclipse</a>
<b>SDK</b>
<c>SDK Manager.exe</c>
<d>blog</d>
<answer>4</answer>
</exercises>
<exercises id="3">
<subject>3.CMS系统属于什么类型的网站系统（）。</subject>
<a>纯静态</a>
<b>纯动态</b>
<c>伪静态</c>
<d>以上都不对</d>
<answer>2</answer>
</exercises>
<exercises id="4">
<subject>4.个人博客与网站的关系（）。</subject>
<a>博客属于网站</a>
<b>网站属于博客</b>
<c>静态网站属于博客</c>
<d>静态博客属于网站</d>
<answer>1</answer>
</exercises>
<exercises id="5">
<subject>5.动态博客有哪些功能（）。</subject>
<a>发布文章</a>
<b>留言评论</b>
<c>后台管理</c>
<d>以上都对</d>
<answer>4</answer>
</exercises>
</infos>
（3）、解析xml文件
找到AnalysisUtils.java文件，添加以下代码用来解析XML文件：
//解析XML文件
public static List<ExercisesBean> getExercisesInfos(InputStream is) throws Exception{
XmlPullParser parser = Xml.newPullParser();
parser.setInput(is,"utf-8");
List<ExercisesBean> exercisesInfos = null;
ExercisesBean exercisesInfo = null;
int type = parser.getEventType();
while (type!=XmlPullParser.END_DOCUMENT){
switch (type){
case XmlPullParser.START_TAG:
if ("infos".equals(parser.getName())){
exercisesInfos = new ArrayList<ExercisesBean>();
}else if ("exercises".equals(parser.getName())){
exercisesInfo = new ExercisesBean();
String ids = parser.getAttributeValue(0);
exercisesInfo.subjectId = Integer.parseInt(ids);
}else if ("subject".equals(parser.getName())){
String subject = parser.nextText();
exercisesInfo.subject=subject;
}else if ("a".equals(parser.getName())){
String a = parser.nextText();
exercisesInfo.a=a;
}else if ("b".equals(parser.getName())){
String b = parser.nextText();
exercisesInfo.b=b;
}else if ("c".equals(parser.getName())){
String c = parser.nextText();
exercisesInfo.c=c;
}else if ("d".equals(parser.getName())){
String d = parser.nextText();
exercisesInfo.d=d;
}else if ("answer".equals(parser.getName())){
String answer = parser.nextText();
exercisesInfo.answer=Integer.parseInt(answer);
}
break;
case XmlPullParser.END_TAG:
if ("exercises".equals(parser.getName())){
exercisesInfos.add(exercisesInfo);
exercisesInfo=null;
}
break;
}
type=parser.next();
}
return exercisesInfos;
}
4、习题详情界面Adapter
在com.boxuegu.adapter包中创建一个Java类，命名为ExrecisesDetailAdapter。代码如下：
package com.boxuegu.adapter;
import android.content.Context;
import com.boxuegu.R;
import com.boxuegu.bean.ExercisesBean;
import com.boxuegu.utils.AnalysisUtils;
import android.view.LayoutInflater;
import android.view.View;
import android.view.ViewGroup;
import android.widget.BaseAdapter;
import android.widget.ImageView;
import android.widget.TextView;
import java.util.ArrayList;
import java.util.List;
public class ExrecisesDetailAdapter extends BaseAdapter {
private Context mContext;
private List<ExercisesBean> ebl;
private OnSelectListener onSelectListener;
public ExrecisesDetailAdapter(Context context,OnSelectListener onSelectListener){
this.mContext = context;
this.onSelectListener = onSelectListener;
}
public void setData(List<ExercisesBean> ebl){
this.ebl = ebl;
notifyDataSetChanged();
}
@Override
public int getCount() {
return ebl == null ? 0 : ebl.size();
}
@Override
public ExercisesBean getItem(int position) {
return ebl == null?null:ebl.get(position);
}
@Override
public long getItemId(int position) {
return position;
}
//记录点击的位置
private ArrayList<String> selectedPosition = new ArrayList<String>();
@Override
public View getView(final int position, View convertView, final ViewGroup parent) {
final ViewHolder vh;
if (convertView == null){
vh = new ViewHolder();
convertView = LayoutInflater.from(mContext).inflate(R.layout.exercises_detail_list_item,null);
vh.subject = (TextView) convertView.findViewById(R.id.tv_subject);
vh.tv_a = (TextView) convertView.findViewById(R.id.tv_a);
vh.tv_b = (TextView) convertView.findViewById(R.id.tv_b);
vh.tv_c = (TextView) convertView.findViewById(R.id.tv_c);
vh.tv_d = (TextView) convertView.findViewById(R.id.tv_d);
vh.iv_a = (ImageView) convertView.findViewById(R.id.iv_a);
vh.iv_b = (ImageView) convertView.findViewById(R.id.iv_b);
vh.iv_c = (ImageView) convertView.findViewById(R.id.iv_c);
vh.iv_d = (ImageView) convertView.findViewById(R.id.iv_d);
convertView.setTag(vh);
}else {
vh=(ViewHolder) convertView.getTag();
}
final ExercisesBean bean = getItem(position);
if (bean != null){
vh.subject.setText(bean.subject);
vh.tv_a.setText(bean.a);
vh.tv_b.setText(bean.b);
vh.tv_c.setText(bean.c);
vh.tv_d.setText(bean.d);
}
if (!selectedPosition.contains("" + position)){
vh.iv_a.setImageResource(R.drawable.exercises_a);
vh.iv_b.setImageResource(R.drawable.exercises_b);
vh.iv_c.setImageResource(R.drawable.exercises_c);
vh.iv_d.setImageResource(R.drawable.exercises_d);
AnalysisUtils.setABCDEnable(true,vh.iv_a,vh.iv_b,vh.iv_c,vh.iv_d);
}else {
AnalysisUtils.setABCDEnable(false,vh.iv_a,vh.iv_b,vh.iv_c,vh.iv_d);
switch (bean.select){
case 0: //用户所选选项是正确的
if (bean.answer == 1){
vh.iv_a.setImageResource(R.drawable.exercises_right_icon);
vh.iv_b.setImageResource(R.drawable.exercises_b);
vh.iv_c.setImageResource(R.drawable.exercises_c);
vh.iv_d.setImageResource(R.drawable.exercises_d);
}else if (bean.answer == 2){
vh.iv_a.setImageResource(R.drawable.exercises_a);
vh.iv_b.setImageResource(R.drawable.exercises_right_icon);
vh.iv_c.setImageResource(R.drawable.exercises_c);
vh.iv_d.setImageResource(R.drawable.exercises_d);
}else if (bean.answer == 3){
vh.iv_a.setImageResource(R.drawable.exercises_a);
vh.iv_b.setImageResource(R.drawable.exercises_b);
vh.iv_c.setImageResource(R.drawable.exercises_right_icon);
vh.iv_d.setImageResource(R.drawable.exercises_d);
}else if (bean.answer == 4){
vh.iv_a.setImageResource(R.drawable.exercises_a);
vh.iv_b.setImageResource(R.drawable.exercises_b);
vh.iv_c.setImageResource(R.drawable.exercises_c);
vh.iv_d.setImageResource(R.drawable.exercises_right_icon);
}
break;
case 1: //用户所选选项A是错误的
vh.iv_a.setImageResource(R.drawable.exercises_error_icon);
if (bean.answer == 2){
vh.iv_b.setImageResource(R.drawable.exercises_right_icon);
vh.iv_c.setImageResource(R.drawable.exercises_c);
vh.iv_d.setImageResource(R.drawable.exercises_d);
}else if (bean.answer == 3){
vh.iv_b.setImageResource(R.drawable.exercises_b);
vh.iv_c.setImageResource(R.drawable.exercises_right_icon);
vh.iv_d.setImageResource(R.drawable.exercises_d);
}else if (bean.answer == 4){
vh.iv_b.setImageResource(R.drawable.exercises_b);
vh.iv_c.setImageResource(R.drawable.exercises_c);
vh.iv_d.setImageResource(R.drawable.exercises_right_icon);
}
break;
case 2: //用户所选选项B是错误的
vh.iv_b.setImageResource(R.drawable.exercises_error_icon);
if (bean.answer == 1){
vh.iv_a.setImageResource(R.drawable.exercises_right_icon);
vh.iv_c.setImageResource(R.drawable.exercises_c);
vh.iv_d.setImageResource(R.drawable.exercises_d);
}else if (bean.answer == 3){
vh.iv_a.setImageResource(R.drawable.exercises_a);
vh.iv_c.setImageResource(R.drawable.exercises_right_icon);
vh.iv_d.setImageResource(R.drawable.exercises_d);
}else if (bean.answer == 4){
vh.iv_a.setImageResource(R.drawable.exercises_a);
vh.iv_c.setImageResource(R.drawable.exercises_c);
vh.iv_d.setImageResource(R.drawable.exercises_right_icon);
}
break;
case 3: //用户所选选项C是错误的
vh.iv_c.setImageResource(R.drawable.exercises_error_icon);
if (bean.answer == 1){
vh.iv_a.setImageResource(R.drawable.exercises_right_icon);
vh.iv_b.setImageResource(R.drawable.exercises_b);
vh.iv_d.setImageResource(R.drawable.exercises_d);
}else if (bean.answer == 2){
vh.iv_a.setImageResource(R.drawable.exercises_a);
vh.iv_b.setImageResource(R.drawable.exercises_right_icon);
vh.iv_d.setImageResource(R.drawable.exercises_d);
}else if (bean.answer == 4){
vh.iv_a.setImageResource(R.drawable.exercises_a);
vh.iv_b.setImageResource(R.drawable.exercises_b);
vh.iv_d.setImageResource(R.drawable.exercises_right_icon);
}
break;
case 4: //用户所选选项D是错误的
vh.iv_c.setImageResource(R.drawable.exercises_error_icon);
if (bean.answer == 1){
vh.iv_a.setImageResource(R.drawable.exercises_right_icon);
vh.iv_b.setImageResource(R.drawable.exercises_b);
vh.iv_c.setImageResource(R.drawable.exercises_c);
}else if (bean.answer == 2){
vh.iv_a.setImageResource(R.drawable.exercises_a);
vh.iv_b.setImageResource(R.drawable.exercises_right_icon);
vh.iv_c.setImageResource(R.drawable.exercises_c);
}else if (bean.answer == 3){
vh.iv_a.setImageResource(R.drawable.exercises_a);
vh.iv_b.setImageResource(R.drawable.exercises_b);
vh.iv_c.setImageResource(R.drawable.exercises_right_icon);
}
break;
default:
break;
}
}
//当用户点击A选项的点击事件
vh.iv_a.setOnClickListener(new View.OnClickListener(){
@Override
public void onClick(View v){
if (selectedPosition.contains("" + position)){
selectedPosition.remove("" + position);
}else {
selectedPosition.add(position + "");
}
onSelectListener.onSelectA(position,vh.iv_a,vh.iv_b,vh.iv_c,vh.iv_d);
}
});
//当用户点击B选项的点击事件
vh.iv_b.setOnClickListener(new View.OnClickListener(){
@Override
public void onClick(View v){
if (selectedPosition.contains("" + position)){
selectedPosition.remove("" + position);
}else {
selectedPosition.add(position + "");
}
onSelectListener.onSelectA(position,vh.iv_a,vh.iv_b,vh.iv_c,vh.iv_d);
}
});
//当用户点击C选项的点击事件
vh.iv_c.setOnClickListener(new View.OnClickListener(){
@Override
public void onClick(View v){
if (selectedPosition.contains("" + position)){
selectedPosition.remove("" + position);
}else {
selectedPosition.add(position + "");
}
onSelectListener.onSelectA(position,vh.iv_a,vh.iv_b,vh.iv_c,vh.iv_d);
}
});
//当用户点击D选项的点击事件
vh.iv_d.setOnClickListener(new View.OnClickListener(){
@Override
public void onClick(View v){
if (selectedPosition.contains("" + position)){
selectedPosition.remove("" + position);
}else {
selectedPosition.add(position + "");
}
onSelectListener.onSelectA(position,vh.iv_a,vh.iv_b,vh.iv_c,vh.iv_d);
}
});
return convertView;
}
class ViewHolder{
public TextView subject,tv_a,tv_b,tv_c,tv_d;
public ImageView iv_a,iv_b,iv_c,iv_d;
}
public interface OnSelectListener{
void onSelectA(int position,ImageView iv_a,ImageView iv_b,ImageView iv_c,ImageView iv_d);
void onSelectB(int position,ImageView iv_a,ImageView iv_b,ImageView iv_c,ImageView iv_d);
void onSelectC(int position,ImageView iv_a,ImageView iv_b,ImageView iv_c,ImageView iv_d);
void onSelectD(int position,ImageView iv_a,ImageView iv_b,ImageView iv_c,ImageView iv_d);
}
}
5、习题详情界面逻辑代码——ExercisesDetailActivity.java
package com.boxuegu.activity;
import android.content.pm.ActivityInfo;
import com.boxuegu.R;
import com.boxuegu.adapter.ExrecisesDetailAdapter;
import com.boxuegu.bean.ExercisesBean;
import com.boxuegu.utils.AnalysisUtils;
import android.graphics.Color;
import android.os.Bundle;
import android.support.v7.app.AppCompatActivity;
import android.support.v7.widget.LinearLayoutCompat;
import android.view.View;
import android.widget.ImageView;
import android.widget.ListView;
import android.widget.RelativeLayout;
import android.widget.TextView;
import java.io.InputStream;
import java.util.ArrayList;
import java.util.List;
public class ExercisesDetailActivity extends AppCompatActivity {
private TextView tv_main_title;
private TextView tv_back;
private RelativeLayout rl_title_bar;
private ListView lv_list;
private String title;
private int id;
private List<ExercisesBean> ebl;
private ExrecisesDetailAdapter adapter;
@Override
protected void onCreate(Bundle savedInstanceState){
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_exercises_detail);
//设置界面为竖屏
setRequestedOrientation(ActivityInfo.SCREEN_ORIENTATION_PORTRAIT);
//获取从习题界面传递过来的章节ID
id = getIntent().getIntExtra("id",0);
//获取从习题界面传递过来的章节标题
title = getIntent().getStringExtra("title");
ebl = new ArrayList<ExercisesBean>();
initData();
init();
}
private void initData(){
try {
//从XML文件中获取习题数据
InputStream is = getResources().getAssets().open("chapter" + id +".xml");
ebl = AnalysisUtils.getExercisesInfos(is);
} catch (Exception e) {
e.printStackTrace();
}
}
//初始化控件
private void init(){
tv_main_title = (TextView) findViewById(R.id.tv_main_title);
tv_back = (TextView) findViewById(R.id.tv_back);
rl_title_bar = (RelativeLayout) findViewById(R.id.title_bar);
rl_title_bar.setBackgroundColor(Color.parseColor("#30B4FF"));
lv_list = (ListView)findViewById(R.id.lv_list);
TextView tv = new TextView(this);
tv.setTextColor(Color.parseColor("#000000"));
tv.setTextSize(16.0f);
tv.setText("第一部分、选择题（单选）");
tv.setPadding(10,15,0,0);
lv_list.addHeaderView(tv);
tv_main_title.setText(title);
tv_back.setOnClickListener(new View.OnClickListener(){
@Override
public void onClick(View v){
ExercisesDetailActivity.this.finish();
}
});
adapter = new ExrecisesDetailAdapter(ExercisesDetailActivity.this,new ExrecisesDetailAdapter.OnSelectListener(){
@Override
public void onSelectD(int postion, ImageView iv_a, ImageView iv_b, ImageView iv_c, ImageView iv_d){
//判断如果答案不是4即D答案
if (ebl.get(postion).answer != 4){
ebl.get(postion).select=4;
}else {
ebl.get(postion).select = 0;
}
switch (ebl.get(postion).answer){
case 1:
iv_a.setImageResource(R.drawable.exercises_right_icon);
iv_d.setImageResource(R.drawable.exercises_error_icon);
break;
case 2:
iv_b.setImageResource(R.drawable.exercises_right_icon);
iv_d.setImageResource(R.drawable.exercises_error_icon);
break;
case 3:
iv_c.setImageResource(R.drawable.exercises_right_icon);
iv_d.setImageResource(R.drawable.exercises_error_icon);
break;
case 4:
iv_d.setImageResource(R.drawable.exercises_right_icon);
break;
}
AnalysisUtils.setABCDEnable(false,iv_a,iv_b,iv_c,iv_d);
}
@Override
public void onSelectC(int postion, ImageView iv_a, ImageView iv_b, ImageView iv_c, ImageView iv_d){
//判断如果答案不是3即C答案
if (ebl.get(postion).answer != 3){
ebl.get(postion).select=3;
}else {
ebl.get(postion).select = 0;
}
switch (ebl.get(postion).answer){
case 1:
iv_a.setImageResource(R.drawable.exercises_right_icon);
iv_c.setImageResource(R.drawable.exercises_error_icon);
break;
case 2:
iv_b.setImageResource(R.drawable.exercises_right_icon);
iv_c.setImageResource(R.drawable.exercises_error_icon);
break;
case 3:
iv_c.setImageResource(R.drawable.exercises_right_icon);
break;
case 4:
iv_c.setImageResource(R.drawable.exercises_error_icon);
iv_d.setImageResource(R.drawable.exercises_right_icon);
break;
}
AnalysisUtils.setABCDEnable(false,iv_a,iv_b,iv_c,iv_d);
}
@Override
public void onSelectB(int postion, ImageView iv_a, ImageView iv_b, ImageView iv_c, ImageView iv_d){
//判断如果答案不是2即B答案
if (ebl.get(postion).answer != 2){
ebl.get(postion).select=2;
}else {
ebl.get(postion).select = 0;
}
switch (ebl.get(postion).answer){
case 1:
iv_a.setImageResource(R.drawable.exercises_right_icon);
iv_b.setImageResource(R.drawable.exercises_error_icon);
break;
case 2:
iv_b.setImageResource(R.drawable.exercises_right_icon);
break;
case 3:
iv_c.setImageResource(R.drawable.exercises_right_icon);
iv_b.setImageResource(R.drawable.exercises_error_icon);
break;
case 4:
iv_d.setImageResource(R.drawable.exercises_right_icon);
iv_b.setImageResource(R.drawable.exercises_error_icon);
break;
}
AnalysisUtils.setABCDEnable(false,iv_a,iv_b,iv_c,iv_d);
}
@Override
public void onSelectA(int postion, ImageView iv_a, ImageView iv_b, ImageView iv_c, ImageView iv_d){
//判断如果答案不是1即A答案
if (ebl.get(postion).answer != 1){
ebl.get(postion).select=1;
}else {
ebl.get(postion).select = 0;
}
switch (ebl.get(postion).answer){
case 1:
iv_a.setImageResource(R.drawable.exercises_right_icon);
break;
case 2:
iv_b.setImageResource(R.drawable.exercises_right_icon);
iv_a.setImageResource(R.drawable.exercises_error_icon);
break;
case 3:
iv_c.setImageResource(R.drawable.exercises_right_icon);
iv_a.setImageResource(R.drawable.exercises_error_icon);
break;
case 4:
iv_d.setImageResource(R.drawable.exercises_right_icon);
iv_a.setImageResource(R.drawable.exercises_error_icon);
break;
}
AnalysisUtils.setABCDEnable(false,iv_a,iv_b,iv_c,iv_d);
}
});
adapter.setData(ebl);
lv_list.setAdapter(adapter);
}
}
6、修改界面代码
（1）、修改习题界面数据适配器
找到ExercisesAdapter.java文件，在注释//跳转到习题详情界面下方添加如下代码：
Intent intent = new Intent(mContext, ExercisesDetailActivity.class);
ntent.putExtra("id",bean.id);
intent.putExtra("title",bean.title);
mContext.startActivity(intent);
（2）、设置A,B,C,D四个选项是否可以点击
找到AnalysisUtils.java文件，添加如下代码：
//设置A,B,C,D4个选项是否可以被点击
public static void setABCDEnable(boolean value, ImageView iv_a,ImageView iv_b, ImageView iv_c,ImageView iv_d){
iv_a.setEnabled(value);
iv_b.setEnabled(value);
iv_c.setEnabled(value);
iv_d.setEnabled(value);
}
三，运行效果
Android项目实战系列—基于博学谷 开源地址
