Android App中读取XML与JSON格式数据的基本方法示例

<?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>

public class TestXmlResourceParserActivity extends Activity { private EditText et; private Button myButton; @Override public 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();       }     }   }); }

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();  }

{  "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();  }