How to Add Text in Header/Footer Area of PDF File in Android Applications

This technical tip shows how developers can add text in headeror footer of a PDF file inside their Android applications. The TextStamp class is used to add text in PDF document. We can also use the same class to add text in Header/Footer area of PDF file. The TextStamp class provides necessary methods to specify font size, font style, and font color etc for stamp object. In order to add text in the Header area, first you need to create a Document object and a TextStamp object using required methods. After that, you can call addStamp(..) method of Page class to add text in the PDF file.     Please note that when placing text in Header section, you need to call setTopMargin(..) in such a way that it adjusts the text in the header area of your PDF. Similarly when placing text in Footer section, you need to call setBottomMargin(..) in such a way that it adjusts to the text in Footer area.

·         When adding stamp object in Header section, you also need to set VerticalAlignment to Top.

·         When adding stamp object in Footer section, you also need to set VerticalAlignment to Bottom.

The following code snippet shows you how to add text in the header of a PDF file.

Java

//open document

com.aspose.pdf.Document pdfDocument = new com.aspose.pdf.Document("/mnt/sdcard/input.pdf");

//create text stamp

com.aspose.pdf.TextStamp textStamp = new com.aspose.pdf.TextStamp("Sample Stamp");

//set properties of the stamp

textStamp.setTopMargin(10);

textStamp.setHorizontalAlignment(com.aspose.pdf.HorizontalAlignment.Center);

textStamp.setVerticalAlignment(com.aspose.pdf.VerticalAlignment.Top);

//set text properties

textStamp.getTextState().setFont(new com.aspose.pdf.FontRepository().findFont("Arial"));

textStamp.getTextState().setFontSize(14.0F);

textStamp.getTextState().setFontStyle(com.aspose.pdf.FontStyles.Bold);

textStamp.getTextState().setFontStyle(com.aspose.pdf.FontStyles.Italic);

textStamp.getTextState().setForegroundColor(java.awt.Color.GREEN);

// iterate through all pages of PDF file

for (int Page_counter =1; Page_counter<=pdfDocument.getPages().size();Page_counter++)

{

    //add stamp to all pages of PDF file

    pdfDocument.getPages().get_Item(Page_counter).addStamp(textStamp);

}

//save output document

pdfDocument.save("/mnt/sdcard/TextStamp_output.pdf");

Overview: Aspose.Pdf for Android

Aspose.Pdf for Android is a PDF document creation & manipulation component that enables Android applications to read, write & manipulate PDF document without using any other third party application. It allows PDF compression options, table creation & manipulation, support for graph objects, extended security controls, custom font handling, add or remove bookmarks, create table of contents, add, update, delete attachments & annotations, import or export PDF form data, print PDF docs &  much more.

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