CODEWITHSUNDEEP
javaandroidandroid-studiopdfpdf-generation
Ruben Meiring
Ruben Meiring

Reputation: 363

IF statements giving Cannot resolve symbol in PDFDocument

So In my app I upload images to my company server

These Images are then converted to PDF with the built PDFdocument method,

Now my Issue is I am trying to make the PDF genertation dynamic by adding IF statements. So My images are loaded into a arraylist and I call a PDF page creation if there is an item in a certain position in the ArrayList with

 if(list.contains(list.get(0))){
code here

}

BUT I am getting Cannot resolve symbols on the code for the next page.

So what I want to Happen IF the list contains a item at position X then it makes a page so the endgame is that for every image the user selects a new page will be created

PDF Creation Code

PdfDocument document=new PdfDocument();

    if(list.contains(list.get(0))) {
        PdfDocument.PageInfo pageInfo=new PdfDocument.PageInfo.Builder(300, 6000, 1).create();
        PdfDocument.Page page=document.startPage(pageInfo);
        Canvas canvas=page.getCanvas();

        Bitmap image=BitmapFactory.decodeFile(list.get(0));
        canvas.setDensity(DENSITY_XHIGH);
        image.setDensity(DENSITY_XHIGH);
        canvas.drawBitmap(image, 1, 1, null);
        document.finishPage(page);
    }

** here I am Getting cannot resolve symbols on page, pageInfo, canvas**

if(list.contains(list.get(1))) {
         pageInfo = new PdfDocument.PageInfo.Builder(, 6000, 2).create();
        page = document.startPage(pageInfo);
        canvas = page.getCanvas();

            Bitmap image2=BitmapFactory.decodeFile(list.get(1));
            canvas.setDensity(DENSITY_XHIGH);
            image2.setDensity(DENSITY_XHIGH);
            canvas.drawBitmap(image2, 1, 1, null);
            document.finishPage(page);
}


        String directory_path=Environment.getExternalStorageDirectory().getPath() + "/mypdf/";
        File file=new File(directory_path);
        if (!file.exists()) {
            file.mkdirs();
        }
        String timeStamp = (new SimpleDateFormat("yyyyMMdd_HHmmss")).format(new Date());
        String targetPdf=directory_path + timeStamp +".pdf";
        File filePath=new File(targetPdf);
        try {
            document.writeTo(new FileOutputStream(filePath));
            Toast.makeText(this, "Done", Toast.LENGTH_LONG).show();
        } catch (IOException e) {
            Log.e("main", "error " + e.toString());
            Toast.makeText(this, "Something wrong: " + e.toString(), Toast.LENGTH_LONG).show();
        }
        // close the document
        document.close();

I think that My problem is I have syntax error somewhere with m IF statements, but I am not sure Any help Will be appreciated

Upvotes: 0

Views: 797

Answers (2)

Scary Wombat
Scary Wombat

Reputation: 44854

To re-iterate

In this code

if(list.contains(list.get(0))) {
    PdfDocument.PageInfo pageInfo=new PdfDocument.PageInfo.Builder(300, 6000, 1).create();
    PdfDocument.Page page=document.startPage(pageInfo);
    Canvas canvas=page.getCanvas();
    ....
 }

you are declaring the variables pageInfo page and canvas - they are limited in scope to this block, so they are not visible to

if(list.contains(list.get(1))) {
     pageInfo = new PdfDocument.PageInfo.Builder(, 6000, 2).create();
    page = document.startPage(pageInfo);
    canvas = page.getCanvas();
    ....
}

You can declare them before the first if block as

PdfDocument.PageInfo pageInfo = null;
PdfDocument.Page page = null;
Canvas canvas = null;

if(list.contains(list.get(0))) {
     pageInfo = .... // set value
}

and

if(list.contains(list.get(1))) {
     pageInfo = ....
}

Upvotes: 1

Stultuske
Stultuske

Reputation: 9437

It has nothing to do with your if statements, just with the scope of your code blocks.

if ( condition ) {
  String t = "yes";
}
System.out.println("myString " + t);

this simple code will cause the exact same problem as your current code. t is a local variable in your if block. Once that block is finished, the variable doesn't exist anymore.

To fix this:

String t = "";
if ( condition ) {
  t = "yes";
}
System.out.println("myString " + t);

This way, the t variable is accessible after your if block is finished, because, since it wasn't declared within the if block, it isn't limited to it's scope.

Upvotes: 2

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