I want to make android app to merge multiple image from single folder into single pdf file.
ex :
folder name :
- images
- 1.jpg
- 2.jpg
- 3.jpg
- 4.jpg
- 5.jpg
there are 5 images are in folder named images
how can i make pdf of that images?
if anyone have possible solution then please comment answer :)
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();
}
If you want to create a pdf file with multiple images you can use PdfDocument from Android. Here is a demo:
private void createPDFWithMultipleImage(){
File file = getOutputFile();
if (file != null){
try {
FileOutputStream fileOutputStream = new FileOutputStream(file);
PdfDocument pdfDocument = new PdfDocument();
for (int i = 0; i < images.size(); i++){
Bitmap bitmap = BitmapFactory.decodeFile(images.get(i).getPath());
PdfDocument.PageInfo pageInfo = new PdfDocument.PageInfo.Builder(bitmap.getWidth(), bitmap.getHeight(), (i + 1)).create();
PdfDocument.Page page = pdfDocument.startPage(pageInfo);
Canvas canvas = page.getCanvas();
Paint paint = new Paint();
paint.setColor(Color.BLUE);
canvas.drawPaint(paint);
canvas.drawBitmap(bitmap, 0f, 0f, null);
pdfDocument.finishPage(page);
bitmap.recycle();
}
pdfDocument.writeTo(fileOutputStream);
pdfDocument.close();
} catch (IOException e) {
e.printStackTrace();
}
}
}
private File getOutputFile(){
File root = new File(this.getExternalFilesDir(null),"My PDF Folder");
boolean isFolderCreated = true;
if (!root.exists()){
isFolderCreated = root.mkdir();
}
if (isFolderCreated) {
String timeStamp = new SimpleDateFormat("yyyyMMdd_HHmmss", Locale.US).format(new Date());
String imageFileName = "PDF_" + timeStamp;
return new File(root, imageFileName + ".pdf");
}
else {
Toast.makeText(this, "Folder is not created", Toast.LENGTH_SHORT).show();
return null;
}
}
Here images is the ArrayList of the images with path.
Break your problem down into smaller problems. It's a fairly simple application.
Get the folder name from the user. See the native file open dialog to find a folder. See here.
Search its files for images
Create a pdf of the images. Use a library such as apache pdfbox.
Use this iText library
Create a document
String FILE = "{folder-path}/FirstPdf.pdf";
Document document = new Document();
PdfWriter.getInstance(document, new FileOutputStream(FILE));
document.open();
Add image in the document
try {
// get input stream
String fileName = "OfflineMap/abc.jpg";
String path =
Environment.getExternalStorageDirectory()+"/"+fileName;
File file = new File(path);
FileInputStream fileInputStream = new FileInputStream(file);
InputStream ims = getAssets().open("myImage.png");
Bitmap bmp = BitmapFactory.decodeStream(ims);
ByteArrayOutputStream stream = new ByteArrayOutputStream();
bmp.compress(Bitmap.CompressFormat.PNG, 100, stream);
Image image = Image.getInstance(stream.toByteArray());
document.add(image);
document.close();
}
catch(IOException ex)
{
return;
}
Related
I'm trying to save a Image type data as a jpg file to SD card, what I plan to do is first converting it to Bitmap, compress bitmap as jpeg format, then use FileOutputStream to save it to SD card.
Here's my code:
File imagefile = new File(sdCardPath, "image.jpg");
Image image = fromFrame.getImage();
ByteBuffer bbuffer = image.getPlanes()[0].getBuffer();
byte[] byts = new byte[bbuffer.capacity()];
bbuffer.get(byts);
Bitmap bitmapImage = BitmapFactory.decodeByteArray(byts, 0, byts.length, null);
try{
FileOutputStream out = new FileOutputStream(imagefile);
bitmapImage.compress(Bitmap.CompressFormat.JPEG, 100, out);
out.flush();
out.close();
} catch (FileNotFoundException e) {
Log.v(TAG, "FileNotFoundExceptionError " + e.toString());
} catch (IOException e) {
Log.v(TAG, "IOExceptionError " + e.toString());
}
It gives error:
java.lang.NullPointerException: Attempt to invoke virtual method 'boolean
android.graphics.Bitmap.compress(android.graphics.Bitmap$CompressFormat,
int, java.io.OutputStream)' on a null object reference
Is there anything I missed or did it wrong?
It turns out that the image file has to be re-organized and as for Depth16 file, every pixel has 16 bits of data, so the code to convert it into a jpg file is:
Image depthimage = fromFrame.getImage();
int imwidth = depthImage.getWidth();
int imheight = depthImage.getHeight();
Image.Plane plane = depthImage.getPlanes()[0];
ShortBuffer shortDepthBuffer = plane.getBuffer().asShortBuffer();
File sdCardFile = Environment.getExternalStorageDirectory();
File file = new File(sdCardFile, "depthImage.jpg");
Bitmap disBitmap = Bitmap.createBitmap(imwidth, imheight, Bitmap.Config.RGB_565);
for (int i = 0; i < imheight; i++) {
for (int j = 0; j < imwidth; j++) {
int index = (i * imwidth + j) ;
shortDepthBuffer.position(index);
short depthSample = shortDepthBuffer.get();
short depthRange = (short) (depthSample & 0x1FFF);
byte value = (byte) depthRange ;
disBitmap.setPixel(j, i, Color.rgb(value, value, value));
}
}
Matrix matrix = new Matrix();
matrix.setRotate(90);
Bitmap rotatedBitmap = Bitmap.createBitmap(disBitmap, 0, 0, imwidth, imheight, matrix, true);
try {
FileOutputStream out = new FileOutputStream(file);
rotatedBitmap.compress(Bitmap.CompressFormat.JPEG, 90, out);
out.flush();
out.close();
MainActivity.num++;
} catch (Exception e) {
e.printStackTrace();
}
} catch (Exception e) {
e.printStackTrace();
}
I also rotate the picture to make it easier to review on mobile devices
I am trying to download an image from the internet and save it to my internal storage to be used elsewhere in my app. However the image that is received fails to compress and save. bitmap.compress(Bitmap.CompressFormat.JPEG, 70, out); throws a nullpointer. Any help is appreciated.
private String SaveImage(String imageURL) {
Bitmap bitmap = null;
try {
// Download Image from URL
URL testUrl = new URL(imageURL);
URLConnection urlConnection = testUrl.openConnection();
HttpURLConnection httpURLConnection = (HttpURLConnection) urlConnection;
InputStream is = httpURLConnection.getInputStream();
// Decode Bitmap
BitmapFactory.Options options = new BitmapFactory.Options();
options.inJustDecodeBounds = true;
BitmapFactory.decodeStream(is, null, options);
Boolean scaleByHeight = Math.abs(options.outHeight - 300) >= Math.abs(options.outWidth - 300);
if(options.outHeight * options.outWidth * 2 >= 200*200*2){
// Load, scaling to smallest power of 2 that'll get it <= desired dimensions
double sampleSize = scaleByHeight
? options.outHeight / 300
: options.outWidth / 300;
options.inSampleSize =
(int)Math.pow(2d, Math.floor(
Math.log(sampleSize)/Math.log(2d)));
}
// Do the actual decoding
options.inJustDecodeBounds = false;
is.close();
is = httpURLConnection.getInputStream();
bitmap = BitmapFactory.decodeStream(is, null, options);
is.close();
String root = getApplicationContext().getFilesDir().toString();
File myDir = new File(root + "/saved_images");
myDir.mkdirs();
Random generator = new Random();
int n = 100000;
n = generator.nextInt(n);
String fname = "Image-" + n + ".png";
File file = new File(myDir, fname);
if (file.exists()) file.delete();
FileOutputStream out = new FileOutputStream(file);
bitmap.compress(Bitmap.CompressFormat.JPEG, 70, out); //here
out.flush();
out.close();
return getApplicationContext().getFilesDir().toString() + "/saved_images/" + "Image-" + n + ".png";
} catch (IOException e) {
e.printStackTrace();
}
return null;
}
I have been trying to convert PDF to png file with transparency without success.
I tried to solve it with many ways but I didn't succeed.
I'm writing my ways hoping someone will find where it went wrong:
1.
try (final PDDocument document = PDDocument.load(new File(srcpath))){
PDFRenderer pdfRenderer = new PDFRenderer(document);
for (int page = 0; page < document.getNumberOfPages(); ++page)
{
BufferedImage bim = pdfRenderer.renderImageWithDPI(page, 300, ImageType.RGB);
String fileName = imageConverted;
boolean hasAlpha = bim.getColorModel().hasAlpha();
System.out.println(hasAlpha);
ImageIOUtil.writeImage(bim, fileName, 300);
}
document.close();
} catch (IOException e){
System.err.println("Exception while trying to create pdf document - " + e);
}
RandomAccessFile raf;
try {
raf = new RandomAccessFile(file, "r");
FileChannel channel = raf.getChannel();
ByteBuffer buf = channel.map(FileChannel.MapMode.READ_ONLY, 0, channel.size());
PDFFile pdffile = new PDFFile(buf);
// draw the first page to an image
int num=pdffile.getNumPages();
for(int i=0;i<num;i++)
{
PDFPage page = pdffile.getPage(i);
//get the width and height for the doc at the default zoom
int width=(int)page.getBBox().getWidth();
int height=(int)page.getBBox().getHeight();
Rectangle rect = new Rectangle(0,0,width,height);
int rotation=page.getRotation();
Rectangle rect1=rect;
if(rotation==90 || rotation==270)
rect1=new Rectangle(0,0,rect.height,rect.width);
//generate the image
BufferedImage img = (BufferedImage)page.getImage(
rect.width, rect.height, //width & height
rect1, // clip rect
null, // null for the ImageObserver
true, // fill background with white
true // block until drawing is done
);
Graphics2D graphics = (Graphics2D)img.getGraphics();
graphics.setBackground( new Color( 255, 255, 255, 0 ) );
ImageIO.write(img, "png", new File(imageConverted));
}
}
catch (FileNotFoundException e1) {
System.err.println(e1.getLocalizedMessage());
} catch (IOException e) {
System.err.println(e.getLocalizedMessage());
}
3.
// Instantiating the PDFRenderer class
PDFRenderer renderer = new PDFRenderer(document);
// Rendering an image from the PDF document
BufferedImage image = null;
try {
image= renderer.renderImage(0);
} catch (IOException e1) {
return "N/A";
}
// Writing the image to a file
try {
ImageIO.write(image, "png", new File(imageConverted));
} catch (IOException e) {
return "N/A";
}
But I get the png with white background...
Any idea?
Thanks in advance!!!
change this line
BufferedImage bim = pdfRenderer.renderImageWithDPI(page, 300, ImageType.RGB);
to
BufferedImage bim = pdfRenderer.renderImageWithDPI(page, 300, ImageType.RGBA);
this will get you a transparent image.
I am uploading an image to the amazon server. Everything works well but only on few devices the orientation changes to landscape. At the time of uploading the orientation changes on a few Samsung devices and tablets. I have tried to fix it but nothing seems to be working. Below mentioned is my code.
if (requestCode == CAPTURE_IMAGE_ACTIVITY_REQUEST_CODE) {
if (resultCode == RESULT_OK) {
value = true;
viewPager.setVisibility(View.VISIBLE);
Uri takenPhotoUri = getPhotoFileUri(photoFileName); //get the uri of the photo in order to get the path.
System.out.println("URI==" + takenPhotoUri);
al.add(takenPhotoUri);
Bitmap takenImage = BitmapFactory.decodeFile(takenPhotoUri.getPath());
final int maxSize = 1560;
int outWidth, outHeight;
int inWidth = takenImage.getWidth();
int inHeight = takenImage.getHeight();
if (inWidth > inHeight) {
outHeight = maxSize;
outWidth = (inHeight * maxSize) / inWidth;
} else {
outHeight = maxSize;
outWidth = (inWidth * maxSize) / inHeight;
}
SimpleDateFormat sdf = new SimpleDateFormat("yyyy-MM-dd");
takenImage = Bitmap.createScaledBitmap(takenImage, outWidth, outHeight, false);
String newDate = sdf.format(new Date());
Canvas canvas = new Canvas(takenImage); //bmp is the bitmap to dwaw into
Paint paint = new Paint();
paint.setColor(Color.RED);
paint.setTextSize(30);
paint.setTextAlign(Paint.Align.RIGHT);
canvas.drawText(newDate, 200, 100, paint);
//Creating a byte array output stream which is used to store the image once it has been compressed.
ByteArrayOutputStream bos = new ByteArrayOutputStream();
//Compress the image and store it in our ByteArrayOutPutStream
takenImage.compress(Bitmap.CompressFormat.JPEG, 90, bos);
int rotate = 0;
try {
getContentResolver().notifyChange(takenPhotoUri, null);
File imageFile = new File(String.valueOf(al.get(0)));
ExifInterface exif = new ExifInterface(
imageFile.getAbsolutePath());
int orientation = exif.getAttributeInt(
ExifInterface.TAG_ORIENTATION,
ExifInterface.ORIENTATION_NORMAL);
switch (orientation) {
case ExifInterface.ORIENTATION_ROTATE_270:
rotate = 270;
break;
case ExifInterface.ORIENTATION_ROTATE_180:
rotate = 180;
break;
case ExifInterface.ORIENTATION_ROTATE_90:
rotate = 90;
break;
}
Matrix matrix = new Matrix();
matrix.postRotate(rotate);
} catch (Exception e) {
e.printStackTrace();
}
try {
s3Client = new AmazonS3Client(
new BasicAWSCredentials(MY_ACCESS_KEY_ID, MY_SECRET_KEY));
byte[] contentBytes = bos.toByteArray(); //Create a byte array to store the size of the stream.
is = new ByteArrayInputStream(contentBytes);
Long contentLength = Long.valueOf(contentBytes.length);
objectMetadata = new ObjectMetadata();
objectMetadata.setContentLength(contentLength);
myAsyncTask = new MyAsyncTask();
myAsyncTask.execute();
responseUrl += s3Client.getResourceUrl(BUCKET_NAME, photoFileName) + " ";
System.out.println("URL IS +==========" + responseUrl);
} catch (Exception e) {
e.printStackTrace();
}
//Add the path of the image to the array list and pass it to our custom adapter.
bitmapArrayList.add(takenImage);
imageSwipeAdapter = new ImageSwipeAdapter(this, iv, bitmapArrayList, viewPager, this, al,
viewPagerLayout, cameraBtn);
viewPager.setAdapter(imageSwipeAdapter);
} else {
Toast.makeText(this, "Picture Wasn't taken!", Toast.LENGTH_SHORT).show();
}
My AsyncTask is uploading the image in the background.
I need to paste 3 pictures in single slide using Apache POI XSLF. However I could able to add only one picture in a slide. Also I could not find any ways to specify the size and orientation the picture should be.
Tried the following code
XMLSlideShow ppt = new XMLSlideShow();
XSLFSlide slide = ppt.createSlide();
XSLFGroupShape group1 = slide.createGroup();
byte buf[] = new byte[1024];
for (int i = 1; i <= 2; i++) {
byte[] pictureData = IOUtils.toByteArray(new FileInputStream(
"C:\\Users\\Ashok\\Pictures\\" + i + ".png"));
int elementIndex = ppt.addPicture(pictureData,
XSLFPictureData.PICTURE_TYPE_PNG);
XSLFPictureShape picture = slide.createPicture(elementIndex);
List<XSLFPictureData> allPictures = ppt.getAllPictures();
System.out.println(allPictures.size());
}
FileOutputStream fos = new FileOutputStream("C:\\test2.pptx");
ppt.write(fos);
fos.flush();
fos.close();
The above code contains only the last image.
You nead to set Anchor to your pictures
for (int i = 1; i <= 2; i++) {
byte[] pictureData = IOUtils.toByteArray(new FileInputStream(
"C:\\Users\\Ashok\\Pictures\\" + i + ".png"));
int elementIndex = ppt.addPicture(pictureData,
XSLFPictureData.PICTURE_TYPE_PNG);
XSLFPictureShape picture = slide.createPicture(elementIndex);
// Set picture position and size
picture.setAnchor(new Rectangle(positionX, positionY, width, height));
List<XSLFPictureData> allPictures = ppt.getAllPictures();
System.out.println(allPictures.size());
}