Question

我正在开发一个应用程序，它从服务器获取数据并解析xml并在列表视图中显示它。但问题是代码在模拟器上运行正常，但是当我在设备上安装应用程序时，它不从服务器获取数据（不连接到互联网）。

我已经使用BB键对应用程序进行了签名，因此该部分没有错误。

以下是我的一些代码..我正在使用连接到互联网 -

public XMLParser() throws SAXException, IOException{

             // connect to feed's URL
            String url=urlToHit;
            System.out.println(url);
            try {
                httpConnection = (HttpConnection)Connector.open(url);
            } catch (IOException e1) {
                // TODO Auto-generated catch block
                e1.printStackTrace();
            }
            try {
                inputStream = httpConnection.openDataInputStream();
            } catch (IOException e) {
                // TODO Auto-generated catch block
                e.printStackTrace();
            }

            if(httpConnection.getResponseCode() == HttpConnection.HTTP_OK)
            {
                // check header field for a specific encoding
                String desiredEncoding = "ISO-8859-1";  //iso-8859-1
                String contenttype = httpConnection.getHeaderField("Content-Type");
                if (contenttype != null)
                {
                    contenttype = contenttype.toUpperCase();
                    if (contenttype.indexOf("UTF-8") != -1)
                    {
                        desiredEncoding = "UTF-8";
                    }
                }

                // we need an input source for the sax parser
                InputSource is = new InputSource(inputStream);

                // setup Encoding to match what the web server sent us
                is.setEncoding(desiredEncoding);

                // create the factory
                SAXParserFactory factory = SAXParserFactory.newInstance();

                // create a parser
                SAXParser parser = null;
                try {
                    parser = factory.newSAXParser();
                } catch (ParserConfigurationException e) {
                    // TODO Auto-generated catch block
                    e.printStackTrace();
                } catch (SAXException e) {
                    // TODO Auto-generated catch block
                    e.printStackTrace();
                }

                // instantiate our handler
                DefaultHandler myHandler= new DefaultHandler(){


                    public void startElement(String uri, String localName,String element_name, Attributes attributes)throws SAXException{


                        if (element_name.equals("Books")){
                            bookCount=attributes.getValue("booksCount");

                    }
                    if (element_name.equals("Book")){

                        TableRowManager row = new TableRowManager();

                        Bitmap scaledBitmap = new Bitmap(50, 70);

                        Bitmap img=Bitmap.createBitmapFromBytes((getImageFromUrl(attributes.getValue("image")).getBytes()), 0,-1, 1);

                        img.scaleInto(scaledBitmap,  Bitmap.FILTER_BILINEAR, Bitmap.SCALE_TO_FIT);
                        //img=(new WebBitmapField(attributes.getValue("image"))).getBitmap();
                        row.add(new BitmapField(scaledBitmap));

                        row.add(new LabelField(attributes.getValue("title"),DrawStyle.ELLIPSIS));
                        //row.add(new BitmapField(attributes.getValue("image"),));
                        LabelField lf1=new LabelField("Author:"+attributes.getValue("author"),DrawStyle.ELLIPSIS){

                            protected void paint(Graphics graphics) {
                             graphics.setColor(0x00878787);

                             super.paint(graphics);

                           }
                        };

                        row.add(lf1);
                        LabelField lf2=new LabelField("ISBN:"+attributes.getValue("isbn13"),DrawStyle.ELLIPSIS){

                            protected void paint(Graphics graphics) {
                             graphics.setColor(0x00878787);

                             super.paint(graphics);

                           }
                        };

                        row.add(lf2);

                        LabelField lf3=new LabelField("year:"+attributes.getValue("year"),DrawStyle.ELLIPSIS){

                            protected void paint(Graphics graphics) {
                             graphics.setColor(0x00878787);

                             super.paint(graphics);

                           }
                        };

                        row.add(lf3);

                        title.addElement(attributes.getValue("title"));
                        isbn.addElement(attributes.getValue("isbn13"));
                        bookImg.addElement(attributes.getValue("image"));
                        author.addElement(attributes.getValue("author"));
                        year.addElement(attributes.getValue("year"));



                        row.add(new BitmapField(p1));

                        rows.addElement(row);
                    }

                    }
                    public void characters(char[] ch, int start, int len) throws SAXException{



                    }

                };

                // perform the synchronous parse           
                parser.parse(is,myHandler);
            }



        }

请建议。

Answer 1

使用;deviceside=true附加网址表示您正在使用DIRECT_TCP传输。在某些无线提供商上，此传输还需要在设备上配置APN设置。请注意，APN设置通常是无线提供商特定的。

谷歌搜索您可以找到无线提供商的APN设置。例如，请检查此link。

Blackberry应用程序无法通过设备上的互联网获取数据

1 个答案: