Convert Image to PDF in Android

How to convert Image to PDF?

I would suggest you to use iText pdf library. Here is the gradle dependency:

implementation 'com.itextpdf:itextg:5.5.10'

 Document document = new Document();

 String directoryPath = android.os.Environment.getExternalStorageDirectory().toString();

 PdfWriter.getInstance(document, new FileOutputStream(directoryPath + "/example.pdf")); //  Change pdf's name.

 document.open();

 Image image = Image.getInstance(directoryPath + "/" + "example.jpg");  // Change image's name and extension.

 float scaler = ((document.getPageSize().getWidth() - document.leftMargin()
               - document.rightMargin() - 0) / image.getWidth()) * 100; // 0 means you have no indentation. If you have any, change it.
 image.scalePercent(scaler);
 image.setAlignment(Image.ALIGN_CENTER | Image.ALIGN_TOP); 

 document.add(image);
 document.close();

how convert multiple images to single PDF from folder in android?

Try this after 4.4 version it will work.

  private void createPDF() {
    final File file = new File(uploadFolder, "AnswerSheet_" + queId + ".pdf");

    final ProgressDialog dialog = ProgressDialog.show(this, "", "Generating PDF...");
    dialog.show();
    new Thread(() -> {
        Bitmap bitmap;
        PdfDocument document = new PdfDocument();
           //  int height = 842;
             //int width = 595;
        int height = 1010;
        int width = 714;
        int reqH, reqW;
        reqW = width;

        for (int i = 0; i < array.size(); i++) {
               //  bitmap = BitmapFactory.decodeFile(array.get(i));
            bitmap = Utility.getCompressedBitmap(array.get(i), height, width);

            reqH = width * bitmap.getHeight() / bitmap.getWidth();
            Log.e("reqH", "=" + reqH);
            if (reqH < height) {
                  //  bitmap = Bitmap.createScaledBitmap(bitmap, reqW, reqH, true);
            } else {
                reqH = height;
                reqW = height * bitmap.getWidth() / bitmap.getHeight();
                Log.e("reqW", "=" + reqW);
                  //   bitmap = Bitmap.createScaledBitmap(bitmap, reqW, reqH, true);
            }
            // Compress image by decreasing quality
                // ByteArrayOutputStream out = new ByteArrayOutputStream();
               //  bitmap.compress(Bitmap.CompressFormat.WEBP, 50, out);
             //    bitmap = BitmapFactory.decodeStream(new ByteArrayInputStream(out.toByteArray()));
            //bitmap = bitmap.copy(Bitmap.Config.RGB_565, false);
              //Create an A4 sized page 595 x 842 in Postscript points.
          //PdfDocument.PageInfo pageInfo = new PdfDocument.PageInfo.Builder(595, 842, 1).create();
            PdfDocument.PageInfo pageInfo = new PdfDocument.PageInfo.Builder(reqW, reqH, 1).create();
            PdfDocument.Page page = document.startPage(pageInfo);
            Canvas canvas = page.getCanvas();

            Log.e("PDF", "pdf = " + bitmap.getWidth() + "x" + bitmap.getHeight());
            canvas.drawBitmap(bitmap, 0, 0, null);

            document.finishPage(page);
        }

        FileOutputStream fos;
        try {
            fos = new FileOutputStream(file);
            document.writeTo(fos);
            document.close();
            fos.close();
        } catch (IOException e) {
            e.printStackTrace();
        }

        runOnUiThread(() -> {
            dismissDialog(dialog);

        });
    }).start();
}

How to convert Image to PDF in Android

Use pdfbox it is a open source lib

use this to insert image in pdf

    PDDocument document = new PDDocument();
InputStream in = new FileInputStream(someImage);
BufferedImage bimg = ImageIO.read(in);
float width = bimg.getWidth();
float height = bimg.getHeight();
PDPage page = new PDPage(new PDRectangle(width, height));
document.addPage(page); 
PDXObjectImage img = new PDJpeg(document, new FileInputStream(someImage));
PDPageContentStream contentStream = new PDPageContentStream(document, page);
contentStream.drawImage(img, 0, 0);
contentStream.close();
in.close();

document.save("test.pdf");
document.close();

Convert image to PDF in Android

I think you are using iText Library to convert the text to pdf. Use this to convert image to pdf.

import java.io.*;
import com.lowagie.text.*;
import com.lowagie.text.pdf.*;
public class imagesPDF
{     
    public static void main(String arg[])throws Exception
    {                  
        Document document=new Document();
        PdfWriter.getInstance(document,new FileOutputStream("YourPDFHere.pdf"));
        document.open();
        Image image = Image.getInstance ("yourImageHere.jpg");
        document.add(new Paragraph("Your Heading for the Image Goes Here"));
        document.add(image);               
        document.close();
   }
}

How I can convert a bitmap into PDF format in android

you can do by this way...you have to download itextpdf-5.3.2.jar file and attach in your project..

public class WritePdfActivity extends Activity 
{
  private static String FILE = "mnt/sdcard/FirstPdf.pdf";

  static Image image;
  static ImageView img;
  Bitmap bmp;
  static Bitmap bt;
  static byte[] bArray;

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

    img=(ImageView)findViewById(R.id.imageView1);

    try 
    {
        Document document = new Document();

        PdfWriter.getInstance(document, new FileOutputStream(FILE));
        document.open();

        addImage(document);
        document.close();
    }

    catch (Exception e) 
    {
        e.printStackTrace();
    }

}
  private static void addImage(Document document) 
  {

    try 
    {
        image = Image.getInstance(bArray);  ///Here i set byte array..you can do bitmap to byte array and set in image...
    } 
    catch (BadElementException e) 
    {
        // TODO Auto-generated catch block
        e.printStackTrace();
    }
    catch (MalformedURLException e) 
    {
        // TODO Auto-generated catch block
        e.printStackTrace();
    }
    catch (IOException e) 
    {
        // TODO Auto-generated catch block
        e.printStackTrace();
    }
     // image.scaleAbsolute(150f, 150f);
      try 
      {
        document.add(image);
    } catch (DocumentException e) {
        // TODO Auto-generated catch block
        e.printStackTrace();
    }
 }
 }

Insert Image into PDF Document

here is the complete code of what you wanted. Try this and let me know.

In the onCreate method:

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

        imageView = findViewById(R.id.imageView);
        galleryBtn = findViewById(R.id.gallery);
        convertBtn = findViewById(R.id.convert);

        galleryBtn.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View v) {
                String timeStamp = new SimpleDateFormat("yyyyMMdd_HHmmss", Locale.getDefault()).format(new Date());
                String imageFileName = "PDF_" + timeStamp + "_";
                File storageDir = getAlbumDir();
                try {
                    pdfPath = File.createTempFile(
                            imageFileName, /* prefix */
                            ".pdf", /* suffix */
                            storageDir  /* directory */
                    );
                } catch (IOException e) {
                    e.printStackTrace();
                }
                Intent photoPickerIntent = new Intent(Intent.ACTION_PICK, android.provider.MediaStore.Images.Media.EXTERNAL_CONTENT_URI);
                startActivityForResult(photoPickerIntent, GALLERY_INTENT);
            }
        });

        convertBtn.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View v) {
                if (bitmap == null) {
                    Toast.makeText(ImageToPDF.this, "Please select the image from gallery", Toast.LENGTH_LONG).show();
                } else {
                    convertToPDF(pdfPath);
                }
            }
        });
    }

Create a directory for PDF file:

private File getAlbumDir() {
        File storageDir = null;
        if (Environment.MEDIA_MOUNTED.equals(Environment.getExternalStorageState())) {
            storageDir = new File(Environment.getExternalStorageDirectory()
                    + "/dcim/"
                    + "Image to pdf");
            if (!storageDir.mkdirs()) {
                if (!storageDir.exists()) {
                    Log.d("CameraSample", "failed to create directory");
                    return null;
                }
            }
        } else {
            Log.v(getString(R.string.app_name), "External storage is not mounted READ/WRITE.");
        }
        return storageDir;
    }

On camera activity intent result:

@Override
    protected void onActivityResult(int requestCode, int resultCode, @Nullable Intent data) {
        super.onActivityResult(requestCode, resultCode, data);
        if (requestCode == GALLERY_INTENT) {
            if (resultCode == Activity.RESULT_OK && data != null) {
                Uri selectedImage = data.getData();
                String[] filePathColumn = {MediaStore.Images.Media.DATA};
                if (selectedImage != null) {
                    Cursor cursor = getContentResolver().query(selectedImage,
                            filePathColumn, null, null, null);
                    if (cursor != null) {
                        cursor.moveToFirst();
                        int columnIndex = cursor.getColumnIndex(filePathColumn[0]);
                        String imagePath = cursor.getString(columnIndex);
                        bitmap = BitmapFactory.decodeFile(imagePath);
                        imageView.setImageBitmap(bitmap);
                        cursor.close();
                    }
                }
            } else if (resultCode == Activity.RESULT_CANCELED) {
                Log.e("Canceled", "Image not selected");
            }
        }
    }

Now code to convert image to PDF and save to the directory:

private void convertToPDF(File pdfPath) {
        int width = bitmap.getWidth();
        int height = bitmap.getHeight();

        PdfDocument pdfDocument = new PdfDocument();
        PdfDocument.PageInfo pageInfo = new PdfDocument.PageInfo.Builder(width, height, 1).create();
        PdfDocument.Page page = pdfDocument.startPage(pageInfo);

        Canvas canvas = page.getCanvas();

        Paint paint = new Paint();
        paint.setColor(Color.parseColor("#ffffff"));
        canvas.drawPaint(paint);

        bitmap = Bitmap.createScaledBitmap(bitmap, width, height, true);
        paint.setColor(Color.BLUE);
        canvas.drawBitmap(bitmap, 0, 0, null);
        pdfDocument.finishPage(page);

        try {
            pdfDocument.writeTo(new FileOutputStream(pdfPath));
            Toast.makeText(ImageToPDF.this, "Image is successfully converted to PDF", Toast.LENGTH_LONG).show();
        } catch (IOException e) {
            e.printStackTrace();
        }
        pdfDocument.close();
    }

how we can convert image and text in pdf when button click?

You do the following code to create pdf -

implement these following libraries in your build.gradle app section: 

implementation 'com.itextpdf:itextg:5.5.10'
implementation 'com.itextpdf:io:7.0.0'
implementation 'com.itextpdf:layout:7.0.0'

Then you need to write the following code on button click -

Button.setOnClickListener(new View.OnClickListener() {
   @Override
      public void onClick(View v) {
          try {
                 createPDF();
              } catch (Exception e) {
                 e.printStackTrace();
              }
       }
});

Then create method createPDF()

private void createPDF() throws Exception{

        File docsFolder = new File(Environment.getExternalStorageDirectory() + File.separator + "AppName" + File.separator + "FolderName");
        boolean success = true;
        if (!docsFolder.exists()) {
            success = docsFolder.mkdirs();
        }
        if (success) {
            String randCode = new SimpleDateFormat("dd MM yyyy HH:mm:ss a", Locale.getDefault()).format(new Date()); //used for unique file name eveytime
            randCode = randCode.replaceAll(":", "");
            randCode = randCode.replaceAll(" ", "");
            pdfFile = new File(docsFolder.getAbsolutePath(), randCode + ".pdf");
            OutputStream outputStream = new FileOutputStream(pdfFile);
            Document document = new Document();
            PdfWriter writer = PdfWriter.getInstance(document, outputStream);
            document.setPageSize(PageSize.A4); //Page  Size
            document.setMargins(30,30,30,30); //here you can put any margin numbers as you wish
            document.open();

            imageView.setDrawingCacheEnabled(true);
            imageView.setDrawingCacheQuality(View.DRAWING_CACHE_QUALITY_HIGH);
            imageView.buildDrawingCache();
            Bitmap bitmap = Bitmap.createBitmap(imageView.getDrawingCache());
            ByteArrayOutputStream stream = new ByteArrayOutputStream();
            bitmap.compress(Bitmap.CompressFormat.PNG,100,stream);
            Image image = Image.getInstance(stream.toByteArray());
            image.scaleToFit(document.getPageSize().getWidth(), document.getPageSize().getHeight());
            image.setAlignment(Element.ALIGN_CENTER);//Center,Left,Right another options
            document.add(image);
            document.newPage(); //used for creating new page
            Font f = new Font(Font.FontFamily.TIMES_ROMAN, 18f, Font.BOLD, BaseColor.RED);
            document.add(new Paragraph("HeadingIfNeeded", f));

            Font f1 = new Font(Font.FontFamily.TIMES_ROMAN, 15f, Font.NORMAL, BaseColor.BLACK);
            document.add(new Paragraph("\n\n" + TextView.getText().toString(), f1));

            document.close();
        }else {
            showToastRed("Error");
        }
}

You can use the above code to createPDF.

Add a Bitmap image in a PDF document in Android

I just solve it:

        document.open();
        ByteArrayOutputStream stream = new ByteArrayOutputStream();
        bm.compress(Bitmap.CompressFormat.JPEG, 100 , stream);
        Image myImg = Image.getInstance(stream.toByteArray());
        myImg.setAlignment(Image.MIDDLE);
        document.add(myImg);

in the FileOperations class

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