xml
假如有这样一个xml格式的数据：
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<?xml version="1.0" encoding="utf-8"?> <resources> <customer name="luopeng" age="21" gender="1" emial="dylankeepmoving@163.com"/> <customer name="dylan" age="22" gender="2" emial="710097663@qq.com"/> <customer name="android" age="6" gender="2" emial="android@gmail.com"/> </resources> |
下面我们来编写一个类来读取，此类的作用是点击按钮后在editview上显示资源文件（一个xml）中的内容，此例中会使用到xmlresourceparser
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public class testxmlresourceparseractivity extends activity { private edittext et; private button mybutton; @overridepublic void oncreate(bundle savedinstancestate) { super.oncreate(savedinstancestate); setcontentview(r.layout.main); // 变量在内部类中使用的前提是此变量必须是final修饰的 mybutton = (button) this.findviewbyid(r.id.btn01); et = (edittext) this.findviewbyid(r.id.edittext01); mybutton.setonclicklistener(new onclicklistener() { stringbuilder sb = new stringbuilder(""); resources res = getresources(); xmlresourceparser xrp = res.getxml(r.xml.test); @override public void onclick(view v) { int counter = 0; try { // 判断是否到了文件的结尾 while (xrp.geteventtype() != xmlresourceparser.end_document) { //文件的内容的起始标签开始，注意这里的起始标签是test.xml文件里面<resources>标签下面的第一个标签 if (xrp.geteventtype() == xmlresourceparser.start_tag) { string tagname = xrp.getname(); if (tagname.endswith("customer")) { counter++; sb.append("这是第" + counter + "客户"+"\n"); sb.append("姓名："+xrp.getattributevalue(0)+"\n"); sb.append("年龄："+xrp.getattributevalue(1)+"\n"); sb.append("性别："+xrp.getattributevalue(2)+"\n"); sb.append("邮箱："+xrp.getattributevalue(3)+"\n\n"); } } xrp.next(); } et.settext(sb.tostring()); } catch (xmlpullparserexception e) { } catch (ioexception e) { e.printstacktrace(); } } }); } |
json
创建json数据
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try { //首先创建对象中的一个单个键值对 jsonobject root = new jsonobject(); root.put("cat", "it"); //另一个键值对的值是一个数组，数组里装了3个json对象，所以再分别搞3个jsonobject对象存放键值对 jsonobject lan1 = new jsonobject(); lan1.put("id", "1"); lan1.put("ide", "eclipse"); lan1.put("name","java"); jsonobject lan2 = new jsonobject(); lan2.put("id", "2"); lan2.put("ide", "xcode"); lan2.put("name","swift"); jsonobject lan3 = new jsonobject(); lan3.put("id", "2"); lan3.put("ide", "visual studio"); lan3.put("name","c#"); //在将这3个对象存入一个数组 jsonarray array = new jsonarray(); array.put(lan1); array.put(lan2); array.put(lan3); //再将数组作为键"languages"的值，构成一个对象 root.put("languages", array); //本例中只将内容输出出来 system.out.println(root.tostring()); } catch (jsonexception e) { e.printstacktrace(); } |
读取json数据
assets/test.json
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{ "languages":[ {"id":1,"ide":"eclipse","name":"java"}, {"id":2,"ide":"xcode","name":"swift"}, {"id":3,"ide":"visual studio","name":"c#"}, ], "cat","it"}try { inputstream is = getresources().getassets().open("test.json"); inputstreamreader isr = new inputstreamreader(is, "utf-8"); bufferedreader br = new bufferedreader(isr); //将文本中的数据，都读取到一个stringbuilder当中 string line; stringbuilder builder = new stringbuilder(); while((line=br.readline()) != null ){ builder.append(line); } br.close(); isr.close(); jsonobject root = new jsonobject(builder.tostring()); //根据键，获得键对应的值，由于值是string类型，所以用getstring system.out.println("cat="+root.getstring("cat")); //根据键，获得键对应的数组，由于值是一个数组，所以用getjsonarray jsonarray array = root.getjsonarray("languages"); //由于要遍历数组，所以创建一个for循环 for(int i=0; i < array. length(); i++){ //由于每一个数组当中的元素，也是一个新的json对象 jsonobject lan = array.getjsonobject(i); system.out.println("-------------------"); system.out.println("id="+lan.getint("id")); system.out.println("ide="+lan.getstring("name")); system.out.println("name="+lan.getstring("name")); log.i("tag","-------"); } } catch (ioexception e) { e.printstacktrace(); } catch (jsonexception e) { // todo auto-generated catch block e.printstacktrace(); } |
