I need to make an app for label printing like this
I am checking this tutorial
And PrintHelper has very simple and limited features.
I can only use two scales - SCALE_MODE_FILL, SCALE_MODE_FIT.
My bitmap image has a size of 512px X 512px. And I might need to adjust the size because of the label sticker size.
OR I need to choose the size of paper(ex. 100mm X 100mm) then, both way above will have the same result.
When I try this code, It opens print setting activity.
private void doPhotoPrint(Bitmap bitmap) {
PrintHelper printHelper = new PrintHelper(this);
printHelper.setColorMode(COLOR_MODE_MONOCHROME);
// Bitmap bitmap = BitmapFactory.decodeResource(getResources(), R.drawable.droids);
printHelper.printBitmap("droids.jpg - test print", bitmap);
}
However, I just want to implement the print function without opening the setting screen, But just when I click 'print' on my application, then right away print one or more bitmap images continuously with the default settings that I set(image size, black&white/color, printer that is connected, paper size).
Is there any way to make a function like the video above?
With the PrintHelper you get the system print dialog there is no way to print silently as the user has to pick the printer and the print attributes from the dialog. To function like the video, you'd need to implement the discovery and printing functionalities with the printer directly
Related
Is there a known API or way to SCAN the text from a card without actually manually saving (and uploading) the picture? (iOS and Android)
Then I would need to know if that API can determine the marquee within the camera that should be scanned.
I want a behaviour similar to the one of QR scanners, or Augmented Reality apps. Where the user just directs the camera and the action occurs.
I have printed cards with a Redeem code in Text, and including QR will need to change the current card production.
The text is inside a white box, which may make it easier to recognise:
On iOS, you would use CIDetector with an AVCaptureSession. It can be used to process capture session output buffers as they come in from the camera without having to take a picture and provide text scanning.
For text detection, using CIDetector with CIDetectorTypeText will return areas that are likely to have text in them, but you would have to perform additional processing for Optical Character Recognition.
You could also use OpenCV for a not out of the box solution.
You can try this: https://github.com/gali8/Tesseract-OCR-iOS
Usage:
// Specify the image Tesseract should recognize on
tesseract.image = [[UIImage imageNamed:#"image_sample.jpg"] g8_blackAndWhite];
// Optional: Limit the area of the image Tesseract should recognize on to a rectangle
tesseract.rect = CGRectMake(20, 20, 100, 100);
// Optional: Limit recognition time with a few seconds
tesseract.maximumRecognitionTime = 2.0;
// Start the recognition
[tesseract recognize];
Is it possible to make an app that will take a picture from a user's phone's gallery and convert it to a android wearable watch face?
I've been reading up on these Android articles
https://developer.android.com/training/wearables/watch-faces/index.html
https://developer.android.com/training/wearables/watch-faces/drawing.html
and it seems if I can get a user to select a picture from the gallery and convert it to a bitmap it would then be plausible to set that as the watch face. I'm definitely a beginner programmer when it comes to Android and apks.
Confirmation from a more advanced Android developer would be great.
Now where I'm getting confused is if the picking of the picture would happen on the user's phone and send it to the android wearable app or if the wearable app has the ability to access the gallery of the user's phone and select it directly. Does anyone know if wearable apps can access the gallery of a users phone?
Assuming I already have a reference of the image selected it would be something like this? Correct me if I'm wrong. (Taken from second article under "Initialize watch face elements"
#Override
public void onCreate(SurfaceHolder holder) {
super.onCreate(holder);
// configure the system UI (see next section)
...
// load the background image
Resources resources = AnalogWatchFaceService.this.getResources();
//at this point the user should have already picked the picture they want
//so set "backgroundDrawable" to the image the user picture
int idOfUserSelectPicture = GetIdOfUserSelectedPictureSomehow();
Drawable backgroundDrawable = resources.getDrawable(idOfUserSelectPicture, null);
//original implementation from article
//Drawable backgroundDrawable = resources.getDrawable(R.drawable.bg, null);
mBackgroundBitmap = ((BitmapDrawable) backgroundDrawable).getBitmap();
// create graphic styles
mHourPaint = new Paint();
mHourPaint.setARGB(255, 200, 200, 200);
mHourPaint.setStrokeWidth(5.0f);
mHourPaint.setAntiAlias(true);
mHourPaint.setStrokeCap(Paint.Cap.ROUND);
...
// allocate a Calendar to calculate local time using the UTC time and time zone
mCalendar = Calendar.getInstance();
}
Thank you for any and all help.
The way to implement this would be to create a configuration Activity that runs on the phone, that picks from an image on your device. You can then send this image as an Asset via the Data Layer http://developer.android.com/training/wearables/data-layer/index.html and it will be received on the watch side, and you can then make it the background of the watch face.
It is not possible for an Android Wear device to see the photo collection on your phone, they are totally separate devices and nothing is shared by default unless you write an application that does this.
The Data Layer sample shows how to take a photo on the phone, and then send it to the wearable: https://github.com/googlesamples/android-DataLayer
I'm a newbie in Android.
I using Nexus7 reference device and I've downloaded the full source code from source.android.com.
I have an engineering system image and I can make a system application.
/system/bin/screencap utility is good for me to capture screen.
I want to get a pixel data using screencap.cpp directly in my application.
When I used to screencap utility, the process is like below.
capture screen and save an image.
Open image file
decodefile to bitmap
get pixel data(int array) from bitmap
I want to remove the step 1, 2 and 3.
Just call api to get pixel data of a screen directly,
How can I do that?
If you're running with system privileges, you can just ask SurfaceComposerClient for the pixel data rather than launching a separate process to do it for you.
Looking at the screencap source code, all you really need is the Binder initialization:
ProcessState::self()->startThreadPool();
and the SurfaceComposerClient IPC call:
ScreenshotClient screenshot;
sp<IBinder> display = SurfaceComposerClient::getBuiltInDisplay(displayId);
if (display != NULL && screenshot.update(display, Rect(), false) == NO_ERROR) {
base = screenshot.getPixels();
w = screenshot.getWidth();
h = screenshot.getHeight();
s = screenshot.getStride();
f = screenshot.getFormat();
size = screenshot.getSize();
}
You can safely ignore all the /dev/graphics/fb0 stuff below it -- it's an older approach that no longer works. The rest of the code is just needed for the PNG compression.
If you're not running with system privileges, you can't capture the entire screen. You can capture your app though.
If you are writing a Java app just call /system/bin/screencap from your application (using java.lang.Process) and read the result into memory as a binary stream. You can see the binary structure in screencap.cpp, but it's just width, height, and format as four byte integers followed by the data.
Note to other readers: this is only be possible if you are a system app.
1) You can transfer data from your screencap utility to your App over the network by using sockets.
2) Android NDK can be used for direct function calls of your utility from your App.
I'm developing application which prints image using Bixolon SPP-R300 mobile printer via Bluetooth.My problem is I can't print my image on whole width of paper. Printer decreases dimensions very much, but saved pictures dimensions in Android is well.I want to print image on whole width.I looked in users manual of Bixolon for android but didn't help. Also in internet there is no information about it.So, I don't know what to do. Here is a code snippet from my project which prints image:
mBxlService = new BxlService();
mBxlService.Connect();
if (mBxlService.GetStatus() == BxlService.BXL_SUCCESS) {
returnValue = mBxlService.PrintImage(mypath.getPath(),
384,
BxlService.BXL_ALIGNMENT_CENTER,
40);
if (returnValue == BxlService.BXL_SUCCESS) {
returnValue = mBxlService.LineFeed(2);
}
}
In user manual,where is written that "Set to a value of 384, image is fit to full size of paper" didn't helped.
Here is a printed image.
and here is manual
The printer you are using has 576 dots per line. The SPP200 has 384 dots.
it is easy to this code
Bitmap bitmap;
View v1 = MyView.getRootView();
v1.setDrawingCacheEnabled(true);
bitmap = Bitmap.createBitmap(v1.getDrawingCache());
v1.setDrawingCacheEnabled(false);
and it works great , but this is the case if there is activity.
How can I take a screenshot from service ?
my goal to take a screenshot ones in a hour ,e.i to to take screen shut every hour for example in 12 then in 1 then in 2 .... and so on
To capture ScreenShot for your activity you have to need a View of your activity, and which one is not present in your service so you have to make a TimerTask which will call your activity at every hour and your activity responding it to with current appear view and you can capture the ScreenShot from that. (I think this one is only solution for your problem.)
Or If you want to take a ScreenShot of your current device screen (any application) then you have to root permission, and read framebuffer for that which will give raw data of current screen then convert it to bitmap or any picture file you can do it in your service.
Android Screenshot Library (ASL) provides means for taking snapshots of phone's screen without the need for signing your application or having privileged (root) access to the Android system
Click here for ASL