Question

我对Android很新，我喜欢将输入流从一个类转移到另一个类。基本上，我试图将一个地理编码的位置发送到服务器，并将响应发送到另一个类进行解析。

这是我到目前为止针对httppost和输入流响应的一段代码：

Location1.java

private void updateWithNewLocation(Location location) {
  if (location != null) {
    double lat = location.getLatitude();
    String lat1 = Double.toString(lat);
    double lng = location.getLongitude();
    String lng1 = Double.toString(lng);

 HttpClient httpclient = new DefaultHttpClient();
 HttpPost httppost = new HttpPost("http://...");

 try {

     List<NameValuePair> nameValuePairs = new ArrayList<NameValuePair>(2);

nameValuePairs.add（new BasicNameValuePair（“lat”，lat1））; nameValuePairs.add（new BasicNameValuePair（“lng”，lng1））; httppost.setEntity（new UrlEncodedFormEntity（nameValuePairs））;

     HttpResponse response = httpclient.execute(httppost);
 InputStream is = response.getEntity().getContent();

BufferedInputStream bis = new BufferedInputStream（is）; ByteArrayBuffer baf = new ByteArrayBuffer（20）;

int current = 0;  
while((current = bis.read()) != -1){  
 baf.append((byte)current);  
}

这是我希望解析输入流的另一个类的片段......这个类中已经有一个输入流，我试图弄清楚如何用其他类中的其他流替换它。

parser1.java

       //I already have an inputstream here and this is where I want to inject the other class inputstream

          InputStream in = httpConnection.getInputStream(); 
          DocumentBuilderFactory dbf = DocumentBuilderFactory.newInstance();
   DocumentBuilder db = dbf.newDocumentBuilder();

   // parse the feed
   Document dom = db.parse(in);      
   Element docEle = dom.getDocumentElement(); ...

非常感谢任何帮助。

Answer 1

我认为这比Android问题更像Java个问题。你不能只使用现有的updateWithNewLocation()方法public并返回InputStream而不是void吗？类似的东西：

Location1.java

public static InputStream updateWithNewLocation(Location location) {
    InputStream result = null;
    if (location != null) {
        double lat = location.getLatitude();
        String lat1 = Double.toString(lat);
        double lng = location.getLongitude();
        String lng1 = Double.toString(lng);

        HttpClient httpclient = new DefaultHttpClient();
        HttpPost httppost = new HttpPost("http://...");

        try {

            List<NameValuePair> nameValuePairs = new ArrayList<NameValuePair>(2);
            nameValuePairs.add(new BasicNameValuePair("lat", lat1));
            nameValuePairs.add(new BasicNameValuePair("lng", lng1));
            httppost.setEntity(new UrlEncodedFormEntity(nameValuePairs));

            HttpResponse response = httpclient.execute(httppost);
            result = response.getEntity().getContent();
        } catch(Exception e) {
            //error handling
        }
    return result;
}

parser1.java

...
InputStream in = Location1.updateWithNewLocation(location)
DocumentBuilderFactory dbf = DocumentBuilderFactory.newInstance();
DocumentBuilder db = dbf.newDocumentBuilder();

// parse the feed
Document dom = db.parse(in);      
Element docEle = dom.getDocumentElement();
...

我试图找出一种方法，让一个类的输入流在不同的类中解析

1 个答案: