如何在android中使用REST使用Post方法获取XML信息？

比如说,

URI: http://99.99.99.99:8080/services/api/products/getProduct

Method: POST

Content-Type: application/xml

然后，我使用高级Rest客户端可以获取这些数据

<Products>
  <Product>
    <category>Apple</category>
    <productCode>A1</productCode>
  </Product>
  <Product>
    <category>Orange</category>
    <productCode>A2</productCode>
  </Product>
  <Product>
    <category>Banana</category>
    <productCode>A3</productCode>
  </Product>
....
</Products>

---

我认为，

System.out.println

的输出在logcat中不可见

您应该改为使用类：

Log.d("test", result);

---

您还必须确保您的请求是。

我收到了您的问题，主要是您在主线程中调用api

但您必须在后台线程中调用此api

使用AsynTask

    public class GetDetails extends AsyncTask<String, Void, String>{

    String response = null;
    @Override
    protected String doInBackground(String... strings) {
        try {

    HttpParams httpParameters = new BasicHttpParams();
    int timeoutConnection = 3000;
    HttpConnectionParams.setConnectionTimeout(httpParameters, timeoutConnection);
    // Set the default socket timeout (SO_TIMEOUT) 
    // in milliseconds which is the timeout for waiting for data.
    int timeoutSocket = 5000;
    HttpConnectionParams.setSoTimeout(httpParameters, timeoutSocket);
    DefaultHttpClient httpClient = new DefaultHttpClient(httpParameters);
    HttpPost httppost = null;

    httppost = new HttpPost("http://99.99.99.99:8080/services/api/products/getProduct");

    httppost.setHeader("Accept", "application/xml");
    httppost.setHeader("Content-type", "application/xml");

    HttpResponse httpResponse = httpClient.execute(httppost);

    InputStream inputStream = httpResponse.getEntity().getContent();
    if (inputStream != null)
         response = convertInputStreamToString(inputStream);
    else
        response = null;

    Log.v("data for list", response);

        } catch (Exception e) {
            Log.e("Cann", e.toString());
        }

        return strings[0];
    }

    @Override
    protected void onPostExecute(String result) {
    super.onPostExecute(result);
           if(response != null){
           XmlPullParserFactory factory =XmlPullParserFactory.newInstance();
             factory.setNamespaceAware(true);
             XmlPullParser xpp = factory.newPullParser();

             xpp.setInput(new StringReader (result));
             int eventType = xpp.getEventType();
             while (eventType != XmlPullParser.END_DOCUMENT) {
              if(eventType == XmlPullParser.START_DOCUMENT) {
                  System.out.println("Start document");
              } else if(eventType == XmlPullParser.END_DOCUMENT) {
                  System.out.println("End document");
              } else if(eventType == XmlPullParser.START_TAG) {
                  System.out.println("Start tag "+xpp.getName());
              } else if(eventType == XmlPullParser.END_TAG) {
                  System.out.println("End tag "+xpp.getName());
              } else if(eventType == XmlPullParser.TEXT) {
             System.out.println("End tag "+xpp.getName());       
              }
              eventType = xpp.next();
             }
         }
      }

private String convertInputStreamToString(InputStream inputStream)
        throws IOException {
    BufferedReader bufferedReader = new BufferedReader(
            new InputStreamReader(inputStream));
    String line = "";
    String result = "";
    while ((line = bufferedReader.readLine()) != null)
        result += line;

    inputStream.close();
    return result;

}   

} 

public类GetDetails扩展异步任务{
字符串响应=null；
@凌驾
受保护的字符串背景（字符串…字符串）{
试一试{
HttpParams httpParameters=新的BasicHttpParams（）；
int timeoutConnection=3000；
HttpConnectionParams.setConnectionTimeout（httpParameters，timeoutConnection）；
//设置默认套接字超时（SO\U超时）
//以毫秒为单位，这是等待数据的超时。
int timeoutSocket=5000；
HttpConnectionParams.setSoTimeout（httpParameters，timeoutSocket）；
DefaultHttpClient httpClient=新的DefaultHttpClient（httpParameters）；
HttpPost HttpPost=null；
httppost=新的httppost（“http://99.99.99.99:8080/services/api/products/getProduct");
setHeader（“接受”、“应用程序/xml”）；
setHeader（“内容类型”、“应用程序/xml”）；
HttpResponse HttpResponse=httpClient.execute（httppost）；
InputStream InputStream=httpResponse.getEntity（）.getContent（）；
如果（inputStream！=null）
响应=convertInputStreamToString（inputStream）；
其他的
响应=空；
Log.v（“列表数据”，响应）；
}捕获（例外e）{
Log.e（“Cann”，e.toString（））；
}
返回字符串[0]；
}
@凌驾
受保护的void onPostExecute（字符串结果）{
super.onPostExecute（结果）；
if（响应！=null）{
XmlPullParserFactory工厂=XmlPullParserFactory.newInstance（）；
factory.setNamespaceAware（true）；
XmlPullParser xpp=factory.newPullParser（）；
xpp.setInput（新的StringReader（结果））；
int eventType=xpp.getEventType（）；
while（eventType！=XmlPullParser.END_文档）{
if（eventType==XmlPullParser.START\u文档）{
System.out.println（“开始文档”）；
}else if（eventType==XmlPullParser.END_文档）{
系统输出打印项次（“结束文件”）；
}else if（eventType==XmlPullParser.START_标记）{
System.out.println（“开始标记”+xpp.getName（））；
}else if（eventType==XmlPullParser.END_标记）{
System.out.println（“结束标记”+xpp.getName（））；
}else if（eventType==XmlPullParser.TEXT）{
System.out.println（“结束标记”+xpp.getName（））；
}
eventType=xpp.next（）；
}
}
}
私有字符串转换器InputStreamToString（InputStream InputStream）
抛出IOException{
BufferedReader BufferedReader=新的BufferedReader(
新的InputStreamReader（inputStream））；
字符串行=”；
字符串结果=”；
而（（line=bufferedReader.readLine（））！=null）
结果+=行；
inputStream.close（）；
返回结果；
}   
} 

---

最后，调用

getXml（）

方法更改为

new GetDetails（）.execute（“”）

网络操作必须在单独的线程中完成：在调用new GetDetails（）.execute（“”）之后，Cann日志显示它是java.io.FileNotFoundExceptionies，我可以从高级Rest客户端获取数据。可能是代码问题，Man，inputStream和reader之间存在问题，您有什么建议来解决这个问题吗？非常感谢。我在将输入流转换为字符串时遇到了一些问题，异常即将出现。我添加了函数can you Than，thx，you's hero，它最终可以在logcat中显示数据，现在我正在研究如何分离数据。苹果A1橙A2

    public class GetDetails extends AsyncTask<String, Void, String>{

    String response = null;
    @Override
    protected String doInBackground(String... strings) {
        try {

    HttpParams httpParameters = new BasicHttpParams();
    int timeoutConnection = 3000;
    HttpConnectionParams.setConnectionTimeout(httpParameters, timeoutConnection);
    // Set the default socket timeout (SO_TIMEOUT) 
    // in milliseconds which is the timeout for waiting for data.
    int timeoutSocket = 5000;
    HttpConnectionParams.setSoTimeout(httpParameters, timeoutSocket);
    DefaultHttpClient httpClient = new DefaultHttpClient(httpParameters);
    HttpPost httppost = null;

    httppost = new HttpPost("http://99.99.99.99:8080/services/api/products/getProduct");

    httppost.setHeader("Accept", "application/xml");
    httppost.setHeader("Content-type", "application/xml");

    HttpResponse httpResponse = httpClient.execute(httppost);

    InputStream inputStream = httpResponse.getEntity().getContent();
    if (inputStream != null)
         response = convertInputStreamToString(inputStream);
    else
        response = null;

    Log.v("data for list", response);

        } catch (Exception e) {
            Log.e("Cann", e.toString());
        }

        return strings[0];
    }

    @Override
    protected void onPostExecute(String result) {
    super.onPostExecute(result);
           if(response != null){
           XmlPullParserFactory factory =XmlPullParserFactory.newInstance();
             factory.setNamespaceAware(true);
             XmlPullParser xpp = factory.newPullParser();

             xpp.setInput(new StringReader (result));
             int eventType = xpp.getEventType();
             while (eventType != XmlPullParser.END_DOCUMENT) {
              if(eventType == XmlPullParser.START_DOCUMENT) {
                  System.out.println("Start document");
              } else if(eventType == XmlPullParser.END_DOCUMENT) {
                  System.out.println("End document");
              } else if(eventType == XmlPullParser.START_TAG) {
                  System.out.println("Start tag "+xpp.getName());
              } else if(eventType == XmlPullParser.END_TAG) {
                  System.out.println("End tag "+xpp.getName());
              } else if(eventType == XmlPullParser.TEXT) {
             System.out.println("End tag "+xpp.getName());       
              }
              eventType = xpp.next();
             }
         }
      }

private String convertInputStreamToString(InputStream inputStream)
        throws IOException {
    BufferedReader bufferedReader = new BufferedReader(
            new InputStreamReader(inputStream));
    String line = "";
    String result = "";
    while ((line = bufferedReader.readLine()) != null)
        result += line;

    inputStream.close();
    return result;

}   

}