Question

我可以使用iText在Android应用程序中生成PDF文件，因此会生成PDF文档，但是，在PDF文件中图像不包含。

Answer 1

import java.io.File;
import java.io.FileOutputStream;
import java.io.IOException;
import java.net.URL;
import java.util.Date;

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.Image;
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.PdfImportedPage;
import com.itextpdf.text.pdf.PdfPCell;
import com.itextpdf.text.pdf.PdfPTable;
import com.itextpdf.text.pdf.PdfReader;
import com.itextpdf.text.pdf.PdfWriter;

import android.app.Activity;
import android.os.Bundle;
import android.os.Environment;
import android.widget.TextView;

public class Main extends Activity {

    private static String FILE = Environment.getExternalStorageDirectory()+File.separator+"firstPdf.pdf";
    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 txt1;

    @Override
    public void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.main);

        txt1=(TextView) findViewById(R.id.textView1);

        try {
            Document document = new Document();
            PdfWriter.getInstance(document, new FileOutputStream(FILE));
            document.open();
            addMetaData(document);
            addTitlePage(document);
            addContent(document);
            //createImage();
            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.de ;-).",
                redFont));

        document.add(preface);
        // Start a new page
        document.newPage();
    }

    private static void addContent(Document document) throws DocumentException {
        Anchor anchor = new Anchor("ESTIMATING APP", catFont);
        anchor.setName("ESTIMATING APP");

        // 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 {
        PdfPTable table = new PdfPTable(3);

        // t.setBorderColor(BaseColor.GRAY);
        // t.setPadding(4);
        // t.setSpacing(4);
        // t.setBorderWidth(1);

        PdfPCell c1 = new PdfPCell(new Phrase("Job Name:"));
        c1.setHorizontalAlignment(Element.ALIGN_CENTER);
        table.addCell(c1);

        c1 = new PdfPCell(new Phrase("Test 001"));
        c1.setHorizontalAlignment(Element.ALIGN_CENTER);
        table.addCell(c1);

        c1 = new PdfPCell(new Phrase(""));
        c1.setHorizontalAlignment(Element.ALIGN_CENTER);
        table.addCell(c1);
        table.setHeaderRows(1);

        table.addCell("Date:");
        table.addCell("1.1");
        table.addCell("");
        table.addCell("Labor Rate:");
        table.addCell("2.2");
        table.addCell("");
        table.addCell("Labor Cost:");
        table.addCell("3.2");
        table.addCell("3.3");

        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(" "));
        }
    }

Answer 2

以下是代码:(在日志语句中解释）

String path = null  ;

File file=new File("/mnt/sdcard/PDFfiles");

File f = new File(file, "MyPDFFILE.pdf");

Log.v("stage 1","store the pdf in sd card");

Document document = new Document(PageSize.A4, 38, 38, 50, 38);  

Log.v("stage 2","Document Created");

PdfWriter writer = PdfWriter.getInstance(document, new FileOutputStream(path));  

Log.v("Stage 3", "Pdf writer");

document.open();

Log.v("Stage 4", "Document opened");

document.add(new Paragraph("First Paragraph"));

Log.v("Stage 5", "Creating Paragraph");

Image image = Image.getInstance ("/mnt/sdcard/images/3_5_9_0001.jpg");

Log.v("Stage 6", "Image path adding");

image.setAlignment(Image.MIDDLE| Image.TEXTWRAP);

Log.v("Stage 7", "Image Alignments");

image.setBorder(Image.BOX);

image.setBorderWidth(15); 

document.add(image);

Log.v("Stage 8", "Image adding");

document.close();

Log.v("Stage 7", "Document Closed");

Answer 3

Pdf像图片一样波纹

使用下面的MainActivity代码生成pdf

  public class MainActivity extends AppCompatActivity {

     Button btnCreatePdf;

     TextView tv_title;
     TextView tv_sub_title;
     TextView tv_location;
     TextView tv_city; 
     String file_name_path = "";
     int PERMISSION_ALL = 1;
      String[] PERMISSIONS = {
    android.Manifest.permission.WRITE_EXTERNAL_STORAGE,
    android.Manifest.permission.READ_EXTERNAL_STORAGE,

};


 @Override
 protected void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    setContentView(R.layout.activity_main);

StrictMode.VmPolicy.Builder builder = new StrictMode.VmPolicy.Builder();
StrictMode.setVmPolicy(builder.build());

if (!hasPermissions(MainActivity.this, PERMISSIONS)) {
    ActivityCompat.requestPermissions(MainActivity.this, PERMISSIONS, PERMISSION_ALL);
}

File file = new File(this.getExternalFilesDir(null).getAbsolutePath(), "pdfsdcard_location");
if (!file.exists()) {
    file.mkdir();
}

//this.getExternalFilesDir(null)?.getAbsolutePath()

btnCreatePdf = findViewById(R.id.btnCreatePdf);
tv_title = findViewById(R.id.tv_title);
tv_sub_title = findViewById(R.id.tv_sub_title);
tv_location = findViewById(R.id.tv_location);
tv_city = findViewById(R.id.tv_city);


btnCreatePdf.setOnClickListener(new View.OnClickListener() {
    @Override
    public void onClick(View view) {
        createpdf();
     }
    });

  }


 public void createpdf() {
  Rect bounds = new Rect();
 int pageWidth = 300;
 int pageheight = 470;
int pathHeight = 2;

final String fileName = "mypdf";
file_name_path = "/pdfsdcard_location/" + fileName + ".pdf";
PdfDocument myPdfDocument = new PdfDocument();
Paint paint = new Paint();
Paint paint2 = new Paint();
Path path = new Path();
PdfDocument.PageInfo myPageInfo = new PdfDocument.PageInfo.Builder(pageWidth, pageheight, 1).create();
PdfDocument.Page documentPage = myPdfDocument.startPage(myPageInfo);
Canvas canvas = documentPage.getCanvas();
int y = 25; // x = 10,
//int x = (canvas.getWidth() / 2);
int x = 10;

paint.getTextBounds(tv_title.getText().toString(), 0, tv_title.getText().toString().length(), bounds);
x = (canvas.getWidth() / 2) - (bounds.width() / 2);
canvas.drawText(tv_title.getText().toString(), x, y, paint);

paint.getTextBounds(tv_sub_title.getText().toString(), 0, tv_sub_title.getText().toString().length(), bounds);
x = (canvas.getWidth() / 2) - (bounds.width() / 2);
y += paint.descent() - paint.ascent();
canvas.drawText(tv_sub_title.getText().toString(), x, y, paint);

y += paint.descent() - paint.ascent();
canvas.drawText("", x, y, paint);

//horizontal line
path.lineTo(pageWidth, pathHeight);
paint2.setColor(Color.GRAY);
paint2.setStyle(Paint.Style.STROKE);
path.moveTo(x, y);

canvas.drawLine(0, y, pageWidth, y, paint2);

//blank space
y += paint.descent() - paint.ascent();
canvas.drawText("", x, y, paint);

y += paint.descent() - paint.ascent();
x = 10;
canvas.drawText(tv_location.getText().toString(), x, y, paint);

y += paint.descent() - paint.ascent();
x = 10;
canvas.drawText(tv_city.getText().toString(), x, y, paint);

//blank space
y += paint.descent() - paint.ascent();
canvas.drawText("", x, y, paint);

//horizontal line
path.lineTo(pageWidth, pathHeight);
paint2.setColor(Color.GRAY);
paint2.setStyle(Paint.Style.STROKE);
path.moveTo(x, y);
canvas.drawLine(0, y, pageWidth, y, paint2);

//blank space
y += paint.descent() - paint.ascent();
canvas.drawText("", x, y, paint);

Resources res = getResources();
Bitmap bitmap = BitmapFactory.decodeResource(res, R.drawable.logo);
Bitmap b = (Bitmap.createScaledBitmap(bitmap, 100, 50, false));
canvas.drawBitmap(b, x, y, paint);
y += 25;
canvas.drawText(getString(R.string.app_name), 120, y, paint);


myPdfDocument.finishPage(documentPage);

File file = new File(this.getExternalFilesDir(null).getAbsolutePath() + file_name_path);
try {
    myPdfDocument.writeTo(new FileOutputStream(file));
} catch (IOException e) {
    e.printStackTrace();
}

  myPdfDocument.close();
  viewPdfFile();
     }

 public void viewPdfFile() {

  File file = new File(this.getExternalFilesDir(null).getAbsolutePath() + file_name_path);
  Intent intent = new Intent(Intent.ACTION_VIEW);
  intent.setDataAndType(Uri.fromFile(file), "application/pdf");
  intent.setFlags(Intent.FLAG_ACTIVITY_NO_HISTORY);
  startActivity(intent);
  }


  public static boolean hasPermissions(Context context, String... permissions) {
if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.M && context != null && permissions != null) {
    for (String permission : permissions) {
        if (ActivityCompat.checkSelfPermission(context, permission) != PackageManager.PERMISSION_GRANTED) {
            return false;
        }
      }
     }
     return true;
   }
 }

从GitHub下载的完整源代码：https://github.com/enamul95/CreatePdf.git

如何在android中生成带图像的Pdf文件？

3 个答案: