我正在使用下面的代码来调整大小并将文件保存到黑莓设备中。图像缩放后,我尝试将图像文件写入设备。但它提供了相同的数据。 (图像的高度和宽度是相同的)。我必须做重新缩放的图像文件。任何人都可以帮助我?黑莓图像重新调整和写入重新调整后的图像文件
类ResizeImage扩展MainScreen实现FieldChangeListener { 私人字符串路径= “文件:///SDCard/BlackBerry/pictures/test.jpg”; 私人ButtonField btn; ResizeImage() { btn = new ButtonField(“Write File”); btn.setChangeListener(this); add(btn); } 公共无效fieldChanged(场场,INT上下文) { 如果(场== BTN) { 尝试 {
的InputStream的inputStream = NULL; //获取文件连接 FileConnection fileConnection =(FileConnection)Connector.open(path); if(fileConnection.exists()) inputStream = fileConnection.openInputStream(); // byte data [] = 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");
}
}
}