Pro Android学习笔记（四）：了解Android资源（下）

<rootname="tom"><--也可以是<root>，本次采用带参数的方式作为实验--> 
   <leaf>Hello from an elementtest.</leaf>
    <leaf>Hello World!</leaf>
    <cornersradius="13dp"/>
 </root>

try{  //防止在解析过程中，因xml文件书写或解析分析不匹配等原因造成的异常
    XmlPullParser xpp =getResources().getXml(R.xml.rt_test); //获取XML资源的对象
             
    int eventType = xpp.next();  //相当于xpp.next(); int eventType =xpp.getEventType()，而next()直接返回类型
   while(eventType != XmlPullParser.END_DOCUMENT){ //根据类型不同进行相应处理
        switch(eventType){ 
        caseXmlPullParser.START_DOCUMENT: 
            Log.d("xml","***************start****************"); 
            break; 
        caseXmlPullParser.START_TAG: 
            int count = xpp.getAttributeCount(); 
            Log.d("xml","starttap: " + xpp.getName() + "attribute number " +count); 
            for(int i = 0 ; i < count ; i ++){ //此处处理<xxxx yy=zz….>中yy=zz的参数部分，要注意xml是允许这样编写，除非确定自定义的XML的schema中不纯正此方式               Log.d("xml","    Attribute " + i + " : " + xpp.getAttributeName(i) +" = " +xpp.getAttributeValue(i)); 
            } 
            break; 
        caseXmlPullParser.END_TAG: 
            Log.d("xml","endtap: " + xpp.getName()); 
            break; 
        case XmlPullParser.TEXT: 
            Log.d("xml"," text: " + xpp.getText()); 
            break; 
        default: 
            Log.d("xml","eventType= " + eventType); 
            break; 
        } 
       eventType = xpp.next();    } 
    Log.d("xml","***************end****************"); 
}catch(Throwable t){ 
    Log.e("xml","testXMLget exception t : " +t.getMessage()); 
 }

protected void testRaw(){ 
    try{ //io读取，对异常的获取
       InputStream is =getResources().openRawResource(R.raw.rt_test); //获取raw资源
        readTextFile(is);
        is.close();
    }catch(Throwable t){
        Log.e("raw","testRaw error : " + t.getMessage());
    }
 } 
private void readTextFile(InputStream is) throwsIOException{
    ByteArrayOutputStream baos = new ByteArrayOutputStream();
     int ch =is.read();
     while(ch !=-1){
        baos.write(ch);
        ch =is.read();           
     }
    Log.d("raw",baos.toString());
    //Log.d("raw",newString(baos.toByteArray(),"GB2312"));
}

protected void testAssets(){ 
     try{
        AssetManager am = getAssets(); //通过AssetManager来获取/assets目录下的文件
       InputStream is =am.open("vt_test.txt");//不使用ID，直接通过文件名来获取，又如”subbir/vt_test2.txt”       readTextFile(is);
        is.close();
    }catch(Throwable t){
        Log.e("asset","testAsset Resource error : " + t.getMessage());
     }
 }