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How to convert blob into .png and send it via firebase notification?

I have a problem when I try to send .png image via firebase service. Notification works fine and it comes to my phone, but, without image. Also, I've tried putting a direct link to the image from internet but when I tried to convert blob from database into .png and send it like that It doesnt send picture. I guess that I am not sending the image the right way?
Here is my controller code below:
Java
Company company = companyService.findCompanyByName(systemUserService.findByUsername(principal.getName()).getCompany().getName());
Notification notify = notificationService.findByName(name);
System.out.println("Title: " + notify.getName());
System.out.println("Message: " + notify.getText());
JSONObject body = new JSONObject();
body.put("to", "/topics/" + TOPIC);
body.put("priority", "high");
JSONObject notification = new JSONObject();
notification.put("title", notify.getName());
notification.put("body", notify.getText());
notification.put("sound", "default");
try {
byte[] aByteArray = company.getLogo();
int width = 1;
int height = 2;
DataBuffer buffer = new DataBufferByte(aByteArray, aByteArray.length);
WritableRaster raster = Raster.createInterleavedRaster(buffer, width, height, 3 * width, 3, new int[] {0, 1, 2}, (Point)null);
ColorModel cm = new ComponentColorModel(ColorModel.getRGBdefault().getColorSpace(), false, true, Transparency.OPAQUE, DataBuffer.TYPE_BYTE);
BufferedImage image = new BufferedImage(cm, raster, true, null);
ImageIO.write(image, "png", new File("image.png"));
notification.put("image", image);
} catch (IOException e) {
e.printStackTrace();
}
JSONObject data = new JSONObject();
data.put("Key-1", "JSA Data 1");
data.put("Key-2", "JSA Data 2");
body.put("notification", notification);
body.put("data", data);
HttpEntity<String> request = new HttpEntity<>(body.toString());
CompletableFuture<String> pushNotification = androidPushNotificationsService.send(request);
CompletableFuture.allOf(pushNotification).join();
try {
String firebaseResponse = pushNotification.get();
return new ResponseEntity<>(firebaseResponse, HttpStatus.OK);
} catch (InterruptedException e) {
e.printStackTrace();
} catch (ExecutionException e) {
e.printStackTrace();
}
return new ResponseEntity<>("Push Notification ERROR!", HttpStatus.BAD_REQUEST);

Try something like this :
Download image from URL and convert to Base64 encoded String that can be JSONified.
public String jsonifyImage(String imageUrl) {
try {
URL url = new URL(imageUrl);
HttpURLConnection connection = (HttpURLConnection) url.openConnection();
connection.setDoInput(true);
connection.connect();
Bitmap bMap = BitmapFactory.decodeStream(connection.getInputStream());
ByteArrayOutputStream oStream = new ByteArrayOutputStream();
bMap.compress(Bitmap.CompressFormat.PNG, 100, oStream);
byte[] byteArr = oStream.toByteArray();
return Base64.getEncoder().encodeToString(byteArr);
} catch (Exception e) {
//handle
return null;
}
}

The result should be image: "...base64 of the image file...".
byte[] aByteArray = company.getLogo();
String image = Base64.getEncoder().encodeToString(aByteArray);
notification.put("image", image);
For json of course no image needs to be loaded. The blob should contain the bytes of the image (file).

save zoom image level to file

Let's say that I want to load an shp file, do my stuff on it and save the map as an image.
In order to save an image I am using:
public void saveImage(final MapContent map, final String file, final int imageWidth) {
GTRenderer renderer = new StreamingRenderer();
renderer.setMapContent(map);
Rectangle imageBounds = null;
ReferencedEnvelope mapBounds = null;
try {
mapBounds = map.getMaxBounds();
double heightToWidth = mapBounds.getSpan(1) / mapBounds.getSpan(0);
imageBounds = new Rectangle(0, 0, imageWidth, (int) Math.round(imageWidth * heightToWidth));
} catch (Exception e) {
// Failed to access map layers
throw new RuntimeException(e);
}
BufferedImage image = new BufferedImage(imageBounds.width, imageBounds.height, BufferedImage.TYPE_INT_RGB);
Graphics2D gr = image.createGraphics();
gr.setPaint(Color.WHITE);
gr.fill(imageBounds);
try {
renderer.paint(gr, imageBounds, mapBounds);
File fileToSave = new File(file);
ImageIO.write(image, "png", fileToSave);
} catch (IOException e) {
throw new RuntimeException(e);
}
}
But, let's say I am doing something like this:
...
MapContent map = new MapContent();
map.setTitle("TEST");
map.addLayer(layer);
map.addLayer(shpLayer);
// zoom into the line
MapViewport viewport = new MapViewport(featureCollection.getBounds());
map.setViewport(viewport);
saveImage(map, "/tmp/img.png", 800);
1) The problem is that the zoom level isn't saved on the image file.Is there a way to save it?
2) When I am doing MapViewport(featureCollection.getBounds()); is there a way to extend a little bit the boundaries in order to have a better visual representation?
...

The reason that you aren't saving the map at the current zoom level is that in your saveImage method you have the line:
mapBounds = map.getMaxBounds();
which always uses the full extent of the map, you can change this to
mapBounds = map.getViewport().getBounds();
You can expand a bounding box by something like:
ReferencedEnvelope bounds = featureCollection.getBounds();
double delta = bounds.getWidth()/20.0; //5% on each side
bounds.expandBy(delta );
MapViewport viewport = new MapViewport(bounds);
map.setViewport(viewport );
A quicker (and easier) way to save a map from the GUI is to use a method like this which just saves exactly what is on the screen:
public void drawMapToImage(File outputFile, String outputType,
JMapPane mapPane) {
ImageOutputStream outputImageFile = null;
FileOutputStream fileOutputStream = null;
try {
fileOutputStream = new FileOutputStream(outputFile);
outputImageFile = ImageIO.createImageOutputStream(fileOutputStream);
RenderedImage bufferedImage = mapPane.getBaseImage();
ImageIO.write(bufferedImage, outputType, outputImageFile);
} catch (IOException ex) {
ex.printStackTrace();
} finally {
try {
if (outputImageFile != null) {
outputImageFile.flush();
outputImageFile.close();
fileOutputStream.flush();
fileOutputStream.close();
}
} catch (IOException e) {// don't care now
}
}
}

Load Canvas image into Excel

I created a plot on Canvas. Now I want to add the image to an Excel file.
I know how to get a WritableImage from Canvas and I know that I need an InputStream to write an image in Excel with addPicture(). The problem is how to link these two.
I could save this image to file and then open and load it to Excel, but maybe there is a way to avoid this?

You could use a PipedInputStream/PipedOutputStream to accomplish this:
Image image = ...
BufferedImage bImage = SwingFXUtils.fromFXImage(image, null);
PipedOutputStream pos;
try (PipedInputStream pis = new PipedInputStream()) {
pos = new PipedOutputStream(pis);
new Thread(() -> {
try {
ImageIO.write(bImage, "png", pos);
} catch (IOException ex) {
throw new IllegalStateException(ex);
}
}).start();
workbook.addPicture(pis, Workbook.PICTURE_TYPE_PNG);
} catch (IOException ex) {
throw new IllegalStateException(ex);
}
or you could write the data to a array using ByteArrayOutputStream:
Image image = ...
BufferedImage bImage = SwingFXUtils.fromFXImage(image, null);
ByteArrayOutputStream bos = new ByteArrayOutputStream();
try {
ImageIO.write(bImage, "png", bos);
} catch (IOException ex) {
throw new IllegalStateException(ex);
}
workbook.addPicture(bos.toByteArray(), Workbook.PICTURE_TYPE_PNG);

How to save an image in a set location?

I am trying to save a resized picture to the user's desktop but not sure how to do that.
Here's my code so far:
mi.addActionListener(new ActionListener() {
#Override
public void actionPerformed(ActionEvent e) {
String userhome = System.getProperty("user.home");
fileChooser = new JFileChooser(userhome + "\\Desktop");
fileChooser.setAutoscrolls(true);
switch (fileChooser.showOpenDialog(f)) {
case JFileChooser.APPROVE_OPTION:
BufferedImage img = null;
try {
img = ImageIO.read(fileChooser.getSelectedFile());
} catch (IOException e1) {
e1.printStackTrace();
}
Image dimg = img.getScaledInstance(f.getWidth(),
f.getHeight(), Image.SCALE_SMOOTH);
path = new ImageIcon(dimg);
configProps.setProperty("Path", fileChooser
.getSelectedFile().getPath());
imBg.setIcon(path);
break;
}
}
});
The code above resizes the imaged selected to fit the size of the JFrame then sets it to the JLabel.
This all works well but I also want to output the file to a set location lets say to the users desktop to make it easier. I'm currently looking at output stream but can't quite get my head around it.
Any help would be great.

Get the current Icon from the JLabel...
Icon icon = imgBg.getIcon();
Paint the icon to a BufferedImage...
BufferedImage img = new BufferedImage(icon.getIconWidth(), icon.getIconHeight(), BufferedImage.TYPE_INT_ARGB);
Graphics2D g2d = img.createGraphics();
icon.paintIcon(null, g2d, 0, 0);
g2d.dispose();
Save the image to a file...
ImageIO.write(img, "png", new File("ResizedIcon.png"));
(and yes, you could use a JFileChooser to pick the file location/name)
You should also take a look at this for better examples of scaling an image, this way, you could scale the BufferedImage to another BufferedImage and save the hassle of having to re-paint the Icon
You might also like to take a look at Writing/Saving an Image

This is a example which is about saving images from Web to the local.
package cn.test.net;
import java.io.ByteArrayOutputStream;
import java.io.File;
import java.io.FileOutputStream;
import java.io.InputStream;
import java.net.HttpURLConnection;
import java.net.URL;
public class ImageRequest {
/**
* #param args
*/
public static void main(String[] args) throws Exception {
//a url from web
URL url = new URL("http://img.hexun.com/2011-06-21/130726386.jpg");
//open
HttpURLConnection conn = (HttpURLConnection)url.openConnection();
//"GET"!
conn.setRequestMethod("GET");
//Timeout
conn.setConnectTimeout(5 * 1000);
//get data by InputStream
InputStream inStream = conn.getInputStream();
//to the binary , to save
byte[] data = readInputStream(inStream);
//a file to save the image
File imageFile = new File("BeautyGirl.jpg");
FileOutputStream outStream = new FileOutputStream(imageFile);
//write into it
outStream.write(data);
//close the Stream
outStream.close();
}
public static byte[] readInputStream(InputStream inStream) throws Exception{
ByteArrayOutputStream outStream = new ByteArrayOutputStream();
byte[] buffer = new byte[1024];
//every time read length,if -1 ,end
int len = 0;
//a Stream read from buffer
while( (len=inStream.read(buffer)) != -1 ){
//mid parameter for starting position
outStream.write(buffer, 0, len);
}
inStream.close();
//return data
return outStream.toByteArray();
}
}
Hope this is helpful to you!

how to draw text on image view android

I have an app that calculate time of phone usage and you can share it on social networks, instead of normal gettext() I want to put the results on an image and save it to phone. How can I create an image that I can save to the phone that includes custom text?

What you want to do is to paint to a Canvas that's linked to a Bitmap, and save the bitmap. Here's a few bits of code that you should be able to string together to make it work. Note that you'll have to still add the paining to the canvas, in the getBitmap() function.
private Bitmap getBitmap() {
Bitmap bitmap = Bitmap.createBitmap(mPieToss.getWidth(),
mPieToss.getHeight(), Bitmap.Config.ARGB_8888);
Canvas canvas = new Canvas(bitmap);
// Draw things to your canvas. They will be included as your BitMap, which is saved later on
return bitmap;
}
public void save() {
Bitmap bitmap = getBitmap();
File path = Environment
.getExternalStoragePublicDirectory(Environment.DIRECTORY_PICTURES);
String timestamp = new SimpleDateFormat("yyyyMMdd_HHmmss")
.format(new Date());
String filename = "Imagen_" + timestamp + ".jpg";
File file = new File(path, filename);
FileOutputStream stream;
// This can fail if the external storage is mounted via USB
try {
stream = new FileOutputStream(file);
bitmap.compress(CompressFormat.PNG, 100, stream);
stream.close();
} catch (FileNotFoundException e) {
e.printStackTrace();
} catch (IOException e) {
e.printStackTrace();
}
mUri = Uri.fromFile(file);
bitmap.recycle();
}

First of all convert your layout to bitmap:
View contentLayout; // your layout with bavkground image and TextView
Bitmap bitmap = Bitmap.createBitmap(screenWidth, screenHeight, Bitmap.Config.ARGB_8888);
Canvas canvas = new Canvas(bitmap);
content.draw(canvas);
Now you can save it to the file:
FileOutputStream fos = new FileOutputStream(fileName, false);
bitmap.compress(Bitmap.CompressFormat.PNG, 75, fos);
fos.flush();
fos.close();