Android：在内部存储目录中将捕获的图像格式从JPEG保存为PNG

Question

In Eclipse,i have Captured Image from emulator and it save the format as JPEG.But i want to save the image format as PNG. How can i convert image format from JPEG to PNG.

Here I am using this code to save the image in directory.

    SimpleDateFormat dateFormat = new SimpleDateFormat("yyyymmddhhmmss");
    String date = dateFormat.format(new Date());
   String photoFile = "Picture_" + date + ".PNG";
// String photoFile = "Picture_" + date + ".JPEG";
    String filename = pictureFileDir.getPath() + File.separator + photoFile;

    File pictureFile = new File(filename);

    try {
      FileOutputStream fos = new FileOutputStream(pictureFile);

      fos.write(data);

      fos.close();
      Toast.makeText(context, "New Image saved:" + photoFile,
          Toast.LENGTH_LONG).show();
    } catch (Exception error) {
      //Log.d(IntersaActivity.DEBUG_TAG, "File" + filename + "not saved: "+ error.getMessage());
      Toast.makeText(context, "Image could not be saved.",
          Toast.LENGTH_LONG).show();
    } 

Thanks in Advance.

Answer 1

Here the code for creating image file using Bitmap class

Edit

you need to first open your existing image file into this bmp object and in file object give another name for save.

Bitmap bmp = BitmapFactory.decodeFile(pathName);// here you need to pass your existing file path


File image = new File(your_sdcard_file_path);
FileOutputStream outStream;
try {
    image.createFile(); // need to create file as empty first if it was exist already then change the name
    outStream = new FileOutputStream(image);
// here you need to pass the format as I have passed as PNG so you can create the file with specific format
    bitmap.compress(Bitmap.CompressFormat.PNG, 100, outStream); 
    /* 100 to keep full quality of the image */

    outStream.flush();
    outStream.close();
    success = true;
} catch (FileNotFoundException e) {
    e.printStackTrace();
} catch (IOException e) {
    e.printStackTrace();
}