android开发步步为营之24：milliondollars游戏技术要点代码生成控件和读取xml文件

时间：2014-09-24 00:05:35 阅读：324 评论：0 收藏：0 [点我收藏+]

Milliondollars智力问答游戏，主要的技术要点（一）、读取题库数据xml文件（二）、如何动态的生成题目和选项。这里做个总结，供以后参考。
（一）、读取题库数据xml文件
将assets/topics.xml文件读取
topics.xml格式：
<?xml version="1.0" encoding="UTF-8"?>
<book>
 <question topic="《全唐诗》是哪个时期的人编辑的？">
 <a>清朝</a>
 唐朝
 <c>明朝</c>
 <d>元朝</d>
 <answer>清朝</answer>
 </question>
 <question topic="荷兰是国花是？">
 <a>荷花</a>
 玫瑰
 <c>风信子</c>
 <d>郁金香</d>
 <answer>郁金香</answer>
 </question>
 <question topic="乐山大佛历经多少年方才建成？">
 <a>90</a>
 80
 <c>70</c>
 <d>60</d>
 <answer>90</answer>
 </question>
 <question topic="人的自我意识是从什么时候产生的？">
 <a>2岁左右</a>
 1岁左右
 <c>3岁左右</c>
 <d>4岁左右</d>
 <answer>1岁左右</answer>
 </question>
</book>
读取代码：
/**
 * 从xml中读取所有的题目
 */
 public void readTopicXml() {
 DocumentBuilderFactory docBuilderFactory = null;
 DocumentBuilder docBuilder = null;
 Document doc = null;
 try {
 docBuilderFactory = DocumentBuilderFactory.newInstance();
 docBuilder = docBuilderFactory.newDocumentBuilder();
 // xml file 放到 assets目录中的
 doc = docBuilder.parse(this.getResources().getAssets()
 .open("topics.xml"));
 // root element
 Element root = doc.getDocumentElement();
 // 获取所有的题目
 NodeList nodeList = root.getElementsByTagName("question");
 topics = new ArrayList<Topic>();
 int nodelength = nodeList.getLength();
 for (int a = 0; a < nodelength; a++) {
 Node nd = nodeList.item(a);
 Topic tp = new Topic();
 tp.topicid = a;
 // topics
 tp.topic = nd.getAttributes().item(0).getNodeValue();
 // items and answer
 NodeList nl = nd.getChildNodes();
 int childCount = nl.getLength();
 for (int b = 0; b < childCount; b++) {
 Node ndchild = nl.item(b);
 if (ndchild instanceof Element) {
 if (ndchild.getNodeName().equals("a")) {
 tp.a = ndchild.getTextContent();
 }
 if (ndchild.getNodeName().equals("b")) {
 tp.b = ndchild.getTextContent();
 }
 if (ndchild.getNodeName().equals("c")) {
 tp.c = ndchild.getTextContent();
 }
 if (ndchild.getNodeName().equals("d")) {
 tp.d = ndchild.getTextContent();
 }
 if (ndchild.getNodeName().equals("answer")) {
 tp.answer = ndchild.getTextContent();
 }
 }

 }

 topics.add(tp);
 }

 } catch (Exception e) {
 Log.e("err", e.getMessage());
 Log.e("err", e.getStackTrace().toString());
 } finally {
 doc = null;
 docBuilder = null;
 docBuilderFactory = null;
 Date d = new Date();
 Log.i("info", d.toLocaleString()
 + ":MillionaireActivity.readTopicXml complete");
 }
 }

（二）、如何动态的生成题目和选项
/**
 * 动态设置页面
 *
 * @param topics
 */
 public void setLayout(List<Topic> topics) {
 try {

 int count = topics.size();
 Random r = new Random();
 int index = r.nextInt(count);
 while (al.indexOf(index) != -1) {
 index = r.nextInt(count);
 }
 al.add(index);// 已选择的题目

 // scroll view
 ScrollView sv = new ScrollView(this);
 RelativeLayout.LayoutParams svp = new RelativeLayout.LayoutParams(
 RelativeLayout.LayoutParams.FILL_PARENT,
 RelativeLayout.LayoutParams.FILL_PARENT);
 sv.setLayoutParams(svp);
 setContentView(sv);

 // relative layout
 RelativeLayout svlayout = new RelativeLayout(this);
 svlayout.setLayoutParams(svp);
 sv.addView(svlayout);
 tcRadom = topics.get(index);
 // TextView
 // 当前得分
 RelativeLayout.LayoutParams tp = new RelativeLayout.LayoutParams(
 RelativeLayout.LayoutParams.FILL_PARENT, RelativeLayout.LayoutParams.WRAP_CONTENT);
 tp.topMargin = 8;
 tp.leftMargin = 8;
 tp.rightMargin = 8;
 TextView tv = new TextView(this);
 tv.setId(USER_ID + 1);

 tv.setText("当前得分:" + total + "美元");
// tv.setTextColor(Color.RED);
 tv.setLayoutParams(tp);
 svlayout.addView(tv);

 // 题目
 RelativeLayout.LayoutParams tpTopic = new RelativeLayout.LayoutParams(
 RelativeLayout.LayoutParams.WRAP_CONTENT, RelativeLayout.LayoutParams.WRAP_CONTENT);
 tpTopic.topMargin = 8;
 tpTopic.leftMargin = 8;
 tpTopic.rightMargin = 8;
 tpTopic.addRule(RelativeLayout.BELOW, USER_ID + 1);
 TextView tvTopic = new TextView(this);
 tvTopic.setId(USER_ID + 2);

 tvTopic.setText(tcRadom.topic);
// tvTopic.setTextColor(Color.MAGENTA);
 tvTopic.setLayoutParams(tpTopic);
 svlayout.addView(tvTopic);
 // RadioGroup 选项
 items.clear();// 选择的题目对应的选项先清空
 alChoseItems.clear();// 已经随机选出的选项先清空
 items.add(tcRadom.a);
 items.add(tcRadom.b);
 items.add(tcRadom.c);
 items.add(tcRadom.d);
 RelativeLayout.LayoutParams rp = new RelativeLayout.LayoutParams(
 RelativeLayout.LayoutParams.FILL_PARENT, RelativeLayout.LayoutParams.WRAP_CONTENT);
 rp.topMargin = 8;
 rp.leftMargin = 8;
 rp.rightMargin = 8;
 rp.addRule(RelativeLayout.BELOW, USER_ID + 2);
 RadioGroup rg = new RadioGroup(this);
 rg.setId(USER_ID + 3);

 Random ra = new Random();
 // A选项随机抽取
 int itemAIndex = ra.nextInt(4);
 while (alChoseItems.indexOf(itemAIndex) != -1) {
 itemAIndex = ra.nextInt(4);
 }
 alChoseItems.add(itemAIndex);
 RadioButton rba = new RadioButton(this);
 rba.setText("A." + items.get(itemAIndex));

 // B选项随机抽取
 int itemBIndex = ra.nextInt(4);
 while (alChoseItems.indexOf(itemBIndex) != -1) {
 itemBIndex = ra.nextInt(4);
 }
 alChoseItems.add(itemBIndex);
 RadioButton rbb = new RadioButton(this);
 rbb.setText("B." + items.get(itemBIndex));

 // C选项随机抽取
 int itemCIndex = ra.nextInt(4);
 while (alChoseItems.indexOf(itemCIndex) != -1) {
 itemCIndex = ra.nextInt(4);
 }
 alChoseItems.add(itemCIndex);
 RadioButton rbc = new RadioButton(this);
 rbc.setText("C." + items.get(itemCIndex));

 // D选项随机抽取
 int itemDIndex = ra.nextInt(4);
 while (alChoseItems.indexOf(itemDIndex) != -1) {
 itemDIndex = ra.nextInt(4);
 }
 alChoseItems.add(itemDIndex);
 RadioButton rbd = new RadioButton(this);
 rbd.setText("D." + items.get(itemDIndex));

 rg.addView(rba);
 rg.addView(rbb);
 rg.addView(rbc);
 rg.addView(rbd);
 rg.setLayoutParams(rp);
 svlayout.addView(rg);

 // Button 确定答题
 RelativeLayout.LayoutParams bp = new RelativeLayout.LayoutParams(
 150, RelativeLayout.LayoutParams.WRAP_CONTENT);
 bp.topMargin = 8;
 bp.leftMargin = 8;
 bp.rightMargin = 8;
 bp.addRule(RelativeLayout.BELOW, USER_ID + 3);
 Button btn = new Button(this);
 btn.setId(USER_ID + 4);
 btn.setText("确 定");
 btn.setLayoutParams(bp);
 btn.setOnClickListener(this);
 svlayout.addView(btn);

 // TextView 是否回答正确提示
 RelativeLayout.LayoutParams tpTip = new RelativeLayout.LayoutParams(
 RelativeLayout.LayoutParams.FILL_PARENT, RelativeLayout.LayoutParams.WRAP_CONTENT);
 tpTip.topMargin = 8;
 tpTip.leftMargin = 8;
 tpTip.rightMargin = 8;
 tpTip.addRule(RelativeLayout.BELOW, USER_ID + 4);
 TextView tvTip = new TextView(this);
 tvTip.setId(USER_ID + 5);
 tvTip.setLayoutParams(tpTip);
 svlayout.addView(tvTip);
 } catch (Exception ex) {
 Date d = new Date();
 Log.i("err", d.toLocaleString() + ":MillionaireActivity.setLayout error,"
 + ex.getStackTrace());
 }
 Date d = new Date();
 Log.i("info", d.toLocaleString() + ":MillionaireActivity.setLayout complete");

标签：android xml 代码生成控件

原文地址：http://blog.csdn.net/figo0423/article/details/39505001

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