我有一个 XML 文件，其中包含从 URL 检索到的一些阿拉伯字符，因此我必须将其编码为 UTF-8，以便它可以处理这些字符。
XML 文件：
<Entry>
<lstItems>
<item>
<id>1</id>
<title>News Test 1</title>
<subtitle>16/7/2012</subtitle>
<img>joelle.mobi-mind.com/imgs/news1.jpg</img>
</item>
<item>
<id>2</id>
<title>كريم</title>
<subtitle>16/7/2012</subtitle>
<img>joelle.mobi-mind.com/imgs/news2.jpg</img>
</item>
<item>
<id>3</id>
<title>News Test 333</title>
<subtitle>16/7/2012</subtitle>
<img>joelle.mobi-mind.com/imgs/news3.jpg</img>
</item>
<item>
<id>4</id>
<title>ربيع</title>
<subtitle>16/7/2012</subtitle>
<img>joelle.mobi-mind.com/imgs/cont20.jpg</img>
</item>
<item>
<id>5</id>
<title>News Test 55555</title>
<subtitle>16/7/2012</subtitle>
<img>joelle.mobi-mind.com/imgs/cont21.jpg</img>
</item>
<item>
<id>6</id>
<title>News Test 666666</title>
<subtitle>16/7/2012</subtitle>
<img>joelle.mobi-mind.com/imgs/cont22.jpg</img>
</item>
</lstItems>
</Entry>
我将从 URL 检索到的 XML 解析为字符串，如下所示：
public String getXmlFromUrl(String url) {
try {
return new AsyncTask<String, Void, String>() {
@Override
protected String doInBackground(String... params) {
//String xml = null;
try {
DefaultHttpClient httpClient = new DefaultHttpClient();
HttpGet httpPost = new HttpGet(params[0]);
HttpResponse httpResponse = httpClient.execute(httpPost);
HttpEntity httpEntity = httpResponse.getEntity();
xml = new String(EntityUtils.toString(httpEntity).getBytes(),"UTF-8");
} catch (Exception e) {
e.printStackTrace();
}
return xml;
}
}.execute(url).get();
} catch (InterruptedException e) {
// TODO Auto-generated catch block
e.printStackTrace();
} catch (ExecutionException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
return xml;
}
现在将返回的 String 传递给该方法以获取 Document 供以后使用，如下所示：
public Document getDomElement(String xml){
Document doc = null;
DocumentBuilderFactory dbf = DocumentBuilderFactory.newInstance();
try {
DocumentBuilder db = dbf.newDocumentBuilder();
InputSource is = new InputSource();
StringReader xmlstring=new StringReader(xml);
is.setCharacterStream(xmlstring);
is.setEncoding("UTF-8");
//Code Stops here !
doc = db.parse(is);
} catch (ParserConfigurationException e) {
Log.e("Error: ", e.getMessage());
return null;
} catch (SAXException e) {
Log.e("Error: ", e.getMessage());
return null;
} catch (IOException e) {
Log.e("Error: ", e.getMessage());
return null;
}
// return DOM
return doc;
}
出现此消息的错误：
09-18 07:51:40.441: E/Error:(1210): Unexpected token (position:TEXT @1:4 in java.io.StringReader@4144c240)
所以代码在我上面显示的地方崩溃并出现以下错误
09-18 07:51:40.451: E/AndroidRuntime(1210): java.lang.RuntimeException: Unable to start activity ComponentInfo{com.example.university1/com.example.university1.MainActivity}: java.lang.NullPointerException
请注意，该代码适用于 ISO 编码。