java.text.SimpleDateFormat#getInstance ( )源码实例Demo

/**
 * Creates the image file to which the image must be saved.
 * 
 * @return
 * @throws IOException
 */
private File createImageFile() throws IOException {
    SimpleDateFormat dateFormat = (SimpleDateFormat) SimpleDateFormat.getInstance();
    dateFormat.applyPattern("yyyyMMdd_HHmmss");
    String timeStamp = dateFormat.format(new Date());
    String imageFileName = "JPEG_" + timeStamp + "_";
    File storageDir = Environment.getExternalStoragePublicDirectory(
            Environment.DIRECTORY_PICTURES);
    // 检测目录是否存在
    if (!storageDir.exists()) {
        storageDir.mkdirs();
    }
    File image = File.createTempFile(imageFileName, ".jpg", storageDir);

    mNewImagePath = image.getAbsolutePath();
    return image;
}
 

private static DateFormat getInstance() {
    return SimpleDateFormat.getInstance();
}
 

public DateTimeRenderer() {
    super();
    dateFormatter = (SimpleDateFormat) SimpleDateFormat.getInstance();
    //log.info("Simple inst");
}