file file = new file(directoryname,filename); // Creating output stream to write in the newly created file fileOutputStream fOut = null; try { fOut = new fileOutputStream(file); } catch (fileNotFoundException e) { e.printstacktrace(); } // Creating a new document document document = new document(PageSize.A4,50,50); try { pdfWriter.getInstance(document,fOut); // Open the document for writing document.open(); // Write in the document document.add(new Paragraph("Hello world")); document.close(); } catch(documentException de) { System.err.println(de.getMessage()); }
运行我的应用程序并执行上面的代码后,我收到以下错误:
java.lang.NoClassDefFoundError: Failed resolution of: Ljava/awt/color;
有人会知道我的代码有什么问题,或者其他确保用于创建和编写pdf文件的方法有什么问题?
谢谢 !
解决方法 显然我使用的代码与androID不兼容,因此我得到了错误.您可以在下面找到实际正常工作的正确代码(用于创建pdf文件,在其中放入一些内容,保存并打开新创建的文件):PS:为此,您需要将iTextG的jar添加到您的项目中:
// Method for creating a pdf file from text,saving it then opening it for display public voID createanddisplaypdf(String text) { document doc = new document(); try { String path = Environment.getExternalStorageDirectory().getabsolutePath() + "/Dir"; file dir = new file(path); if(!dir.exists()) dir.mkdirs(); file file = new file(dir,"newfile.pdf"); fileOutputStream fOut = new fileOutputStream(file); pdfWriter.getInstance(doc,fOut); //open the document doc.open(); Paragraph p1 = new Paragraph(text); Font paraFont= new Font(Font.COURIER); p1.setAlignment(Paragraph.AliGN_CENTER); p1.setFont(paraFont); //add paragraph to document doc.add(p1); } catch (documentException de) { Log.e("Pdfcreator","documentException:" + de); } catch (IOException e) { Log.e("Pdfcreator","ioException:" + e); } finally { doc.close(); } vIEwpdf("newfile.pdf","Dir"); } // Method for opening a pdf file private voID vIEwpdf(String file,String directory) { file pdffile = new file(Environment.getExternalStorageDirectory() + "/" + directory + "/" + file); Uri path = Uri.fromfile(pdffile); // Setting the intent for pdf reader Intent pdfIntent = new Intent(Intent.ACTION_VIEW); pdfIntent.setDataAndType(path,"application/pdf"); pdfIntent.setFlags(Intent.FLAG_ACTIVITY_CLEAR_top); try { startActivity(pdfIntent); } catch (ActivityNotFoundException e) { Toast.makeText(tableActivity.this,"Can't read pdf file",Toast.LENGTH_SHORT).show(); } }总结
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