我正在使用以下代码来调整文件大小并将其保存到黑莓设备中。图像缩放后,我尝试将图像文件写入设备。但它给出了相同的数据。(图像的高度和宽度相同)。我必须制作重新缩放的图像文件。有人可以帮我吗???
类 ResizeImage 扩展 MainScreen 实现 FieldChangeListener { private String path="file:///SDCard/BlackBerry/pictures/test.jpg"; 私人 ButtonField btn; ResizeImage() { btn=new ButtonField("写入文件"); btn.setChangeListener(this); 添加(btn);} public void fieldChanged(Field field, int context) { if (field == btn) { try {
输入流 inputStream = null; //获取文件连接 FileConnection fileConnection = (FileConnection) Connector.open(path); if (fileConnection.exists()) { 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");
}
}
}