在android中以pdf格式显示sqlite数据库内容

时间:2012-08-24 05:58:29

标签: android sqlite pdf

我在Android中有一个Sqlite数据库,我希望通过按下按钮在Android中动态构建它来在PDF文件中显示其内容。

我知道iText,但我想采用更简单的解决方案.. 任何人都可以帮助我PLZ !!

4 个答案:

答案 0 :(得分:5)

查看droidtext iText库版本2.1.7 for Android的端口。

也有很多例子。开始使用Helloworld

public class HelloWorld {

        /**
         * Generates a PDF file with the text 'Hello World'
         * 
         * @param args
         *            no arguments needed here
         */
        public static void main(String[] args) {

                System.out.println("Hello World");

                // step 1: creation of a document-object
                Document document = new Document();
                try {
                        // step 2:
                        // we create a writer that listens to the document
                        // and directs a PDF-stream to a file
                        PdfWriter.getInstance(document, new FileOutputStream(android.os.Environment.getExternalStorageDirectory() + java.io.File.separator + "droidtext" + java.io.File.separator + "HelloWorld.pdf"));

                        // step 3: we open the document
                        document.open();
                        // step 4: we add a paragraph to the document
                        document.add(new Paragraph("Hello World"));
                } catch (DocumentException de) {
                        System.err.println(de.getMessage());
                } catch (IOException ioe) {
                        System.err.println(ioe.getMessage());
                }

                // step 5: we close the document
                document.close();
        }
}

答案 1 :(得分:3)

要将Sqlite数据库的内容显示为pdf,您必须使用itextpdf-5.2.1.jar。您可以从here下载

示例代码:

DatabaseHandlerofdatabase   dbHandler = new DatabaseHandlerofdatabase(this);

    SQLiteDatabase db = dbHandler.getWritableDatabase();

    Cursor c1 = db.rawQuery("SELECT * FROM tablename", null);

    String filename="nameoffile.pdf";

     Document document=new Document();  // create the document
     File root = new File(Environment.getExternalStorageDirectory(), "Notes"); 
     if (!root.exists()) {
         root.mkdirs();   // create root directory in sdcard
     }
     File gpxfile = new File(root,filename);  // generate pdf file in that directory
     PdfWriter.getInstance(document,new FileOutputStream(gpxfile));
     document.open();  // open the directory


     Paragraph p3=new Paragraph();  // to enter value you have to create paragraph  and add value in it then paragraph is added into document
     p3.add("Username : ");
     document.add(p3);


    // now for ad table in pdf use below code



     PdfPTable table = new PdfPTable(3); // Code 1

    // Code 2
     table.addCell("CATEGORY");
     table.addCell("BUDGET");
     table.addCell("USED BUDGET");

   // now fetch data from database and display it in pdf

    while (c1.moveToNext()) {



    // get the value from database


        String ex_bdgt = c1.getString(3);
        String used_bdgt = c1.getString(5);


         table.addCell(type);
         table.addCell(ex_bdgt);
         table.addCell(used_bdgt);



        int temp_ex=Integer.parseInt(ex_bdgt);
        ttlbud=ttlbud+temp_ex;
        int temp_used=Integer.parseInt(used_bdgt);
        usdbud=usdbud+temp_used;



    }



    // add table into document

    document.add(table);    
    document.addCreationDate();
      document.close();

答案 2 :(得分:1)

我尝试过Ketul Patel解决方案,解决方案原则上很好,但我需要改变其中的一些内容。我改变了在目录中创建文件的方式,我从here得到了这个想法,并且它完美地运行了。我的最终代码是:

DatabaseHelper是我在项目中创建的类,它扩展了SQLiteOpenHelper。 read more

public void createPdf() throws FileNotFoundException, DocumentException {

    String dir = Environment.getExternalStorageDirectory()+File.separator+"myLogs";
    File folder = new File(dir);
    folder.mkdirs();

    File file = new File(dir, "LogHistory.pdf");


    Cursor c1 = database.rawQuery("SELECT * FROM " + DatabaseHelper.TABLE_LOG, null);
    Document document = new Document();  // create the document
    PdfWriter.getInstance(document, new FileOutputStream(file));
    document.open();

    Paragraph p3 = new Paragraph();
    p3.add("Your Log History for \n");
    document.add(p3);

    PdfPTable table = new PdfPTable(4);
    table.addCell("Date");
    table.addCell("Start");
    table.addCell("End");
    table.addCell("Total");

    while (c1.moveToNext()) {
        String date = c1.getString(3);
        String start = c1.getString(1);
        String end = c1.getString(2);
        String total = c1.getString(4);

        table.addCell(date);
        table.addCell(start);
        table.addCell(end);
        table.addCell(total);
    }

    document.add(table);
    document.addCreationDate();
    document.close();
}

答案 3 :(得分:0)

我已经在fpdf Tutorials的帮助下在php中完成了PDF实现。有了这个,我还获得了饼图和条形图的帮助,以便在我的pdf中进行图形表示。此格式也简化了将我们的pdf文件作为附件邮寄,因为它可以以各种方式存储。