我怎么能在黑莓显示来自URL的图像？ [英] How i can display images from URL in blackberry?

问题描述

我有图像的简单的URL，我想显示位图场的形象。
这是我class..But将不会给出任何结果。

i have simple url of image, i want to display that image in Bitmap Field. this is my class..But it will is not give any result.

public class UrlToImage
{

    public static Bitmap _bmap;
    UrlToImage(String url)
    {
        HttpConnection connection = null; 
        InputStream inputStream = null; 
        EncodedImage bitmap;
        byte[] dataArray = null;

    try 
    { 
        connection = (HttpConnection) Connector.open(url, Connector.READ, true); 
        inputStream = connection.openInputStream(); 
        byte[] responseData = new byte[10000]; 
        int length = 0; 
        StringBuffer rawResponse = new StringBuffer(); 
        while (-1 != (length = inputStream.read(responseData))) 
        { 
        rawResponse.append(new String(responseData, 0, length)); 
        } 
        int responseCode = connection.getResponseCode(); 
        if (responseCode != HttpConnection.HTTP_OK) 
        { 
        throw new IOException("HTTP response code: " 
        + responseCode); 
        } 

        final String result = rawResponse.toString(); 
        dataArray = result.getBytes(); 
    } 
    catch (final Exception ex) 
    { }

    finally 
    { 
        try 
        { 
        inputStream.close(); 
        inputStream = null; 
        connection.close(); 
        connection = null; 
        } 
        catch(Exception e){} 
        } 

        bitmap = EncodedImage.createEncodedImage(dataArray, 0,dataArray.length);
        // this will scale your image acc. to your height and width of bitmapfield

        int multH;
        int multW;
        int currHeight = bitmap.getHeight();
        int currWidth = bitmap.getWidth();
        multH= Fixed32.div(Fixed32.toFP(currHeight),Fixed32.toFP(480));//height
        multW = Fixed32.div(Fixed32.toFP(currWidth),Fixed32.toFP(360));//width
        bitmap = bitmap.scaleImage32(multW,multH);

        _bmap=bitmap.getBitmap();
        }
        public Bitmap getbitmap()
        {
        return _bmap;

        }


    }

感谢名单提前。

推荐答案

试试这个，但这里的URL扩展是非常重要的。

Try this but here url extension is important.

如果使用WiFi那么你的手机界面=无线这是工作，否则它不会对URL扩展工作，所以普莱舍确认以下网址

if your mobile using wifi then ";interface=wifi" this is working otherwise it wont work so for url extensions plese verify following url

对于URL扩展链接

 public static Bitmap connectServerForImage(String url)
{
     HttpConnection httpConnection = null;
     DataOutputStream httpDataOutput = null;
     InputStream httpInput = null;
     int rc;
     Bitmap bitmp = null;
     try 
     {
              httpConnection = (HttpConnection) Connector.open(url+";interface=wifi");
              rc = httpConnection.getResponseCode();
              if (rc == HttpConnection.HTTP_OK) 
              {
                   httpInput = httpConnection.openInputStream();
                   InputStream inp = httpInput;
                   byte[] b = IOUtilities.streamToBytes(inp);
                   EncodedImage hai = EncodedImage.createEncodedImage(b, 0, b.length);
                   bitmp=hai.getBitmap();
               }else{
                    throw new IOException("HTTP response code: " + rc);
               }
      }catch (Exception ex) {
           System.out.println("URL Bitmap Error........" + ex.getMessage());
      } finally 
      {
       try
       {
                if (httpInput != null)
                 httpInput.close();
                if (httpDataOutput != null)
                 httpDataOutput.close();
                if (httpConnection != null)
                 httpConnection.close();

       } catch (Exception e) 
       {
           e.printStackTrace();
       }
      }
    return bitmp;
}

这篇关于我怎么能在黑莓显示来自URL的图像？的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！