在blackberry中重新缩放图像并写入重新缩放的图像文件

我正在使用以下代码调整文件大小并将其保存到blackberry设备中。图像缩放后，我尝试将图像文件写入设备。但它给出了相同的数据。图像的高度和宽度是一样的。我必须重新缩放图像文件。有人能帮我吗

类ResizeImage扩展MainScreen实现FieldChangeListener { 私有字符串路径=file:///SDCard/BlackBerry/pictures/test.jpg; 私人按钮场btn； 调整图像大小 { btn=新按钮字段写入文件； btn.setChangeListenerthis； addbtn； } public void字段changedfield字段，int上下文 { 如果字段==btn { 尝试 { InputStream InputStream=null； //获取文件连接 FileConnection FileConnection=FileConnection Connector.openpath； 如果fileConnection.exe存在 { inputStream=fileConnection.openInputStream； //字节数据[]=inputStream.toString.getBytes

                    ByteArrayOutputStream baos = new ByteArrayOutputStream();
                    int j = 0;
                    while((j=inputStream.read()) != -1) {
                    baos.write(j);
                    }
                    byte data[] = baos.toByteArray();                
                    inputStream.close();
                    fileConnection.close();  

                    WriteFile("file:///SDCard/BlackBerry/pictures/org_Image.jpg",data);           


                    EncodedImage  eImage = EncodedImage.createEncodedImage(data,0,data.length);                               
                    int scaleFactorX = Fixed32.div(Fixed32.toFP(eImage.getWidth()), Fixed32.toFP(80));
                    int scaleFactorY = Fixed32.div(Fixed32.toFP(eImage.getHeight()), Fixed32.toFP(80));
                    eImage=eImage.scaleImage32(scaleFactorX, scaleFactorY);   

                    WriteFile("file:///SDCard/BlackBerry/pictures/resize.jpg",eImage.getData());

                    BitmapField bit=new BitmapField(eImage.getBitmap());                       
                    add(bit);

                }       
            }
            catch(Exception e)
            {
                System.out.println("Exception is ==> "+e.getMessage());
            }

        }
   }


   void WriteFile(String fileName,byte[] data)
   {
       FileConnection fconn = null;
        try
        {
            fconn = (FileConnection) Connector.open(fileName,Connector.READ_WRITE);
        } 
        catch (IOException e) 
        {
            System.out.print("Error opening file");
        }

        if (fconn.exists())
        try 
        {
            fconn.delete();
        }
        catch (IOException e)
        {
            System.out.print("Error deleting file");
        }
        try 
        {
            fconn.create();
        }
        catch (IOException e) 
        {
            System.out.print("Error creating file");
        }
        OutputStream out = null;
        try
        {
            out = fconn.openOutputStream();
        } 
        catch (IOException e) {
            System.out.print("Error opening output stream");
        }

        try 
        {
            out.write(data);
        }
        catch (IOException e) {
            System.out.print("Error writing to output stream");
        }

        try
        {
            fconn.close();
        } 
        catch (IOException e) {
            System.out.print("Error closing file");
        }
    }

---

}

在EncodedImage中查看getScaledHeight和getScaledWidth

这是一个肮脏的圈套

如果使用具有有效getHeight和getWidth的getBitmap剥离位图

然后，如果要将缩放后的图像保存为jpeg格式，则需要重新编码

e、 g

AFAIK，5.0之前的版本，至少在jpeg缩放中没有本机的位图转换

Bitmap scaledBMP = scaledEI.getBitmap();
JPEGEncodedImage finalJPEG = JPEGEncodedImage.encode(scaledBMP, 80); // int arg is quality
raw_media_bytes = finalJPEG.getData();
raw_length = finalJPEG.getLength();
raw_offset = finalJPEG.getOffset();

// don't forget to use the length and offset info, because getData() is
// not guaranteed to work by itself.