Java tutorial
package com.nerdcastle.nazmul.filetest; import android.os.Bundle; import android.os.Environment; import android.support.v7.app.AppCompatActivity; import android.util.Log; import android.widget.TextView; import com.itextpdf.text.Anchor; import com.itextpdf.text.BadElementException; import com.itextpdf.text.BaseColor; import com.itextpdf.text.Chapter; import com.itextpdf.text.Document; import com.itextpdf.text.DocumentException; import com.itextpdf.text.Element; import com.itextpdf.text.Font; import com.itextpdf.text.List; import com.itextpdf.text.ListItem; import com.itextpdf.text.Paragraph; import com.itextpdf.text.Phrase; import com.itextpdf.text.Section; import com.itextpdf.text.pdf.PdfPCell; import com.itextpdf.text.pdf.PdfPTable; import com.itextpdf.text.pdf.PdfWriter; import java.io.BufferedReader; import java.io.File; import java.io.FileNotFoundException; import java.io.FileOutputStream; import java.io.IOException; import java.io.InputStream; import java.io.InputStreamReader; import java.io.OutputStreamWriter; import java.util.ArrayList; import java.util.Date; public class MainActivity extends AppCompatActivity { private static Font catFont = new Font(Font.FontFamily.TIMES_ROMAN, 18, Font.BOLD); private static Font redFont = new Font(Font.FontFamily.TIMES_ROMAN, 12, Font.NORMAL, BaseColor.RED); private static Font subFont = new Font(Font.FontFamily.TIMES_ROMAN, 16, Font.BOLD); private static Font smallBold = new Font(Font.FontFamily.TIMES_ROMAN, 12, Font.BOLD); TextView text; @Override protected void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); setContentView(R.layout.activity_main); text = (TextView) findViewById(R.id.text); writeToFile("Data retrieved successfully"); String data = readFromFile(); text.setText(data); createPdf(); } private void createPdf() { try { Document document = new Document(); String root = Environment.getExternalStorageDirectory().toString(); File myDir = new File(root + "/created_pdf"); myDir.mkdirs(); String fname = "FirstPdf.pdf"; File file = new File(myDir, fname); //FileOutputStream out = new FileOutputStream(file); PdfWriter.getInstance(document, new FileOutputStream(file)); document.open(); addMetaData(document); addTitlePage(document); addContent(document); document.close(); } catch (Exception e) { e.printStackTrace(); } } private static void addMetaData(Document document) { document.addTitle("My first PDF"); document.addSubject("Using iText"); document.addKeywords("Java, PDF, iText"); document.addAuthor("Lars Vogel"); document.addCreator("Lars Vogel"); } private static void addTitlePage(Document document) throws DocumentException { Paragraph preface = new Paragraph(); // We add one empty line addEmptyLine(preface, 1); // Lets write a big header preface.add(new Paragraph("Title of the document", catFont)); addEmptyLine(preface, 1); // Will create: Report generated by: _name, _date preface.add(new Paragraph("Report generated by: " + System.getProperty("user.name") + ", " + new Date(), //$NON-NLS-1$ //$NON-NLS-2$ //$NON-NLS-3$ smallBold)); addEmptyLine(preface, 3); preface.add(new Paragraph("This document describes something which is very important ", smallBold)); addEmptyLine(preface, 8); preface.add(new Paragraph( "This document is a preliminary version and not subject to your license agreement or any other agreement with vogella.com ;-).", redFont)); document.add(preface); // Start a new page document.newPage(); } private static void addContent(Document document) throws DocumentException { Anchor anchor = new Anchor("First Chapter", catFont); anchor.setName("First Chapter"); // Second parameter is the number of the chapter Chapter catPart = new Chapter(new Paragraph(anchor), 1); Paragraph subPara = new Paragraph("Subcategory 1", subFont); Section subCatPart = catPart.addSection(subPara); subCatPart.add(new Paragraph("Hello")); subPara = new Paragraph("Subcategory 2", subFont); subCatPart = catPart.addSection(subPara); subCatPart.add(new Paragraph("Paragraph 1")); subCatPart.add(new Paragraph("Paragraph 2")); subCatPart.add(new Paragraph("Paragraph 3")); // add a list createList(subCatPart); Paragraph paragraph = new Paragraph(); addEmptyLine(paragraph, 5); subCatPart.add(paragraph); // add a table createTable(subCatPart); // now add all this to the document document.add(catPart); // Next section anchor = new Anchor("Second Chapter", catFont); anchor.setName("Second Chapter"); // Second parameter is the number of the chapter catPart = new Chapter(new Paragraph(anchor), 1); subPara = new Paragraph("Subcategory", subFont); subCatPart = catPart.addSection(subPara); subCatPart.add(new Paragraph("This is a very important message")); // now add all this to the document document.add(catPart); } private static void createTable(Section subCatPart) throws BadElementException { ArrayList<String> a = new ArrayList<>(); a.add("1"); a.add("2"); a.add("3"); ArrayList<String> b = new ArrayList<>(); b.add("4"); b.add("5"); b.add("6"); ArrayList<String> c = new ArrayList<>(); c.add("7"); c.add("8"); c.add("9"); PdfPTable table = new PdfPTable(3); // t.setBorderColor(BaseColor.GRAY); // t.setPadding(4); // t.setSpacing(4); // t.setBorderWidth(1); PdfPCell c1 = new PdfPCell(new Phrase("Table Header 1")); c1.setHorizontalAlignment(Element.ALIGN_CENTER); table.addCell(c1); c1 = new PdfPCell(new Phrase("Table Header 2")); c1.setHorizontalAlignment(Element.ALIGN_CENTER); table.addCell(c1); c1 = new PdfPCell(new Phrase("Table Header 3")); c1.setHorizontalAlignment(Element.ALIGN_CENTER); table.addCell(c1); table.setHeaderRows(1); for (int i = 0; i < a.size(); i++) { table.addCell(a.get(i)); table.addCell(b.get(i)); table.addCell(c.get(i)); } /* table.addCell("1.0"); table.addCell("1.1"); table.addCell("1.2"); table.addCell("2.1"); table.addCell("2.2"); table.addCell("2.3");*/ subCatPart.add(table); } private static void createList(Section subCatPart) { List list = new List(true, false, 10); list.add(new ListItem("First point")); list.add(new ListItem("Second point")); list.add(new ListItem("Third point")); subCatPart.add(list); } private static void addEmptyLine(Paragraph paragraph, int number) { for (int i = 0; i < number; i++) { paragraph.add(new Paragraph(" ")); } } private void writeToFile(String data) { try { String root = Environment.getExternalStorageDirectory().toString(); File myDir = new File(root + "/saved_txt"); myDir.mkdirs(); String fname = "config.txt"; File file = new File(myDir, fname); FileOutputStream out = new FileOutputStream(file); OutputStreamWriter outputStreamWriter = new OutputStreamWriter(out); outputStreamWriter.write(data); outputStreamWriter.close(); } catch (IOException e) { Log.e("Exception", "File write failed: " + e.toString()); } } private String readFromFile() { String ret = ""; try { InputStream inputStream = openFileInput("config.txt"); if (inputStream != null) { InputStreamReader inputStreamReader = new InputStreamReader(inputStream); BufferedReader bufferedReader = new BufferedReader(inputStreamReader); String receiveString = ""; StringBuilder stringBuilder = new StringBuilder(); while ((receiveString = bufferedReader.readLine()) != null) { stringBuilder.append(receiveString); } inputStream.close(); ret = stringBuilder.toString(); } } catch (FileNotFoundException e) { Log.e("login activity", "File not found: " + e.toString()); } catch (IOException e) { Log.e("login activity", "Can not read file: " + e.toString()); } return ret; } }