How to Extract Images and Text in Order from PDF file using iText on Android

I have already done Extracting text from a PDF but now i want to extract the images. the first problem is that the images are between the texts per page. what i want to know is how to Extract Images in Order even the file is a 2 columned per page and how to determine where the Image is placed in the text.

Here are some codes that i have tried.

Image Extraction:

ExtractImages.java:
public static final String RESULT = "results/part4/chapter15/Img%s.%s";
public void extractImages(String filename)
    throws IOException, DocumentException {
    PdfReader reader = new PdfReader(filename);
    PdfReaderContentParser parser = new PdfReaderContentParser(reader);
    MyImageRenderListener listener = new MyImageRenderListener(RESULT);
    for (int i = 1; i <= reader.getNumberOfPages(); i++) {
        parser.processContent(i, listener);
    }
}

MyImageRenderListener:
public MyImageRenderListener(String path) {
    this.path = path;
}

public void renderImage(ImageRenderInfo renderInfo) {
    try {
        String filename;
        FileOutputStream os;
        PdfImageObject image = renderInfo.getImage();
        if (image == null) return;
        filename = String.format(path, renderInfo.getRef().getNumber(), image.getFileType());
        os = new FileOutputStream(filename);
        os.write(image.getImageAsBytes());
        os.flush();
        os.close();
    } catch (IOException e) {
        System.out.println(e.getMessage());
    }
}

the code process the contents of the pdf and checks for images, then render those images to a image file(.png,.jpg, etc).

The problem i got here is that it do not extract images in order. I want the image in order so i will know what image comes first in a page and last. How do i do that? then, Is it possible to extract the Images without rendering it to a file? My goal with the image is to display it in my android application as Image without turning it in a file. If I its not possible then I will stick to deleting the images when the user is done using it.

My Purpose is to EXTRACT(NOT VIEW) text and images from a pdf file and display it in order in a android application.