ViewFinder | Just use the ViewFinder instead of any ViewHolder | Android library
kandi X-RAY | ViewFinder Summary
kandi X-RAY | ViewFinder Summary
In few words: The ViewHolder has one function - to provide a link to the view in a layout. So when you use the RecyclerView and you need to add a new View Type in your list - you must create a new ViewHolder. It is fine when you have a couple types. But there is no need to create each time a new Holder. With this library you no need create a ViewHolder each time. The ViewFinder as a universal ViewHolder. It can provide a link to anyone view.
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Top functions reviewed by kandi - BETA
- Sets the text of the TextView with the given ID
- Sets the text of the specified text
- Sets the text of the specified text with the specified ID
- Setup the RecyclerView
- Reload the items
- Sets the typeface of the specified text view
- Sets the listener which should be invoked when a view is clicked
- Sets the text color of the specified view
- Sets the color state of the TextView
- Sets the typeface of the specified view
- Sets the listener which should be notified when the root view is clicked
- Sets the OnLongClickListener to be used when the view is clicked
- Sets the uri of an image
- Set the visibility of the specified finder
- Sets the tag at the specified ID
- Sets the drawable for an image
- Set the visibility of the View to GONE
- Sets the background color of the specified view
- Sets the image resource
- Sets whether the find is pressed
- Sets the bitmap for the specified ID
- Sets the text size of a specific view
- Set the visibility of the specified view
- Sets the visibility of the findable
- Binds the item to the viewHolder
- Sets whether the find is selected or not
ViewFinder Key Features
ViewFinder Examples and Code Snippets
Community Discussions
Trending Discussions on ViewFinder
QUESTION
In CameraX Analysis, setTargetResolution(new Size(2560, 800), but in Analyzer imageProxy.getImage.getWidth=1280 and getHeight=400, and YUVToByte(imageProxy.getImage).length()=768000。In Camera, parameter.setPreviewSize(2560, 800) then byte[].length in onPreviewFrame is 3072000(equales 768000*(2560/1280)*(800/400))。How can I make CameraX Analyzer imageProxy.getImage.getWidth and getHeight = 2560 and 800, and YUVToByte(ImageProxy.getImage).length()=3072000? In CameraX onPreviewFrame(), res always = null, in Camera onPreviewFrame(), res can get currect value, what's the different between CameraX and Camera? And what should I do in CameraX?
CameraX:
...ANSWER
Answered 2021-Jun-13 at 01:15With regards to the image analysis resolution, the documentation of ImageAnalysis.Builder.setTargetResolution()
states that:
The maximum available resolution that could be selected for an ImageAnalysis is limited to be under 1080p.
So setting a size of 2560x800 won't work as you expect. In return CameraX seems to be selecting the maximum ImageAnalysis
resolution that has the same aspect ratio you requested (2560/800 = 1280/400).
QUESTION
I'm trying to do a copy of wechat for practice and I have a list of chats that is clickable and will take me to the next view with NavigationLink
. But the title to the new view aren't aligned with the Navigation Bar Back Button. Checkout these images.
If I use .navigationBarHidden(true)
it gets rid of the title as well.
- ContentView.swift
ANSWER
Answered 2021-Apr-08 at 06:00Remove the NavigationView
in Chat
-- only the parent view should have a NavigationView
-- otherwise you get problems with the navigation bar(s) nesting like you're experiencing.
QUESTION
I'm having a hard time figuring out how to test whether or not a certain image is being show on a position in a recyclerview using espresso. I have a list of people, and when one of them is selected, I'm showing a selected indicator around his image in the recyclerview. So I want to check that, for instance, position 0 has this indicator showing. What I'm trying is this:
...ANSWER
Answered 2021-Mar-31 at 10:04Your custom matcher is only matching hasBackground
with viewHolder.itemView
, which is the root view of an adapter item, meaning the matcher will fail if the background of the root view does not match.
If one of the child views contains the background, then maybe you should wrap the matcher with hasDescendant
, which allow the matcher to match all child views in the item:
QUESTION
This is a general question regarding ImageAnalysis use case of camera-x but I will use a slightly modified version of this codelab as an example to illustrate the issue I'm seeing. I'm seeing a mismatch between the image dimensions (image.height * image.width) and the associated ByteBuffer size as measured by its limit and or capacity. I would expect them to be the same and mapping one pixel of the image to a single value in the ByteBuffer. This does not appear to be the case. Hoping someone can clarify if this is a bug, and if not, how to interpret this mismatch.
DetailsOn step 6 (Image Analysis) of the codelab they provide a subclass for their luminosity analyzer:
...ANSWER
Answered 2021-Mar-19 at 21:23Please take a look at the details of the ImageProxy.PlaneProxy class; they planes are not just packed image data. They may have both row and pixel stride.
Row stride is padding between two adjacent rows of image data. Pixel stride is padding between two adjacent pixels.
Also, planes 1 and 2 in a YUV_420_888 image have half the pixel count of plane 0; the reason you're getting the same size is likely because of pixel stride being 2.
For some resolutions, the stride may be equal to width (usually the processing hardware has some constraint like the row stride has to be a multiple of 16 or 32 bytes), but it may not for all.
QUESTION
I have surfed all the internet and didn't find any solution, I am using Camera2 api to record a video from my front camera, I have tested on multiple devices and its working fine, but when I tried on my Samsung Galaxy 3, after I press the record button sometimes the recording work, and sometimes the camera preview freeze, you can find below the code I have implemented
- Create Preview and Record request by lazy loading
ANSWER
Answered 2021-Mar-07 at 17:41I did not see in your code the handling of the camera on a thread different from the Main/GUI. In fact I never saw a good tutorial to do that - so - this is what I have done:
Declare handlerThread
QUESTION
I'm still practicing with Kotlin and Android Developing. As far as I understood, Camera class has been deprecated, and Android invites to use Camerax instead, because this high-level class is device-indipendent, and they've made simpler the process of implementing cameras on apps.
I've tried to read the documentation (https://developer.android.com/training/camerax) but it's written so bad I barely understood what they are trying to explain. So I went to read the entire sample code given in the documentation itself (https://github.com/android/camera-samples/tree/main/CameraXBasic). The CameraFragment code is about 500 lines long (ignoring imports and various comments).
Do I really need to write 500 lines of code to simply take a picture? How is this supposed to be considered "simpler than before"?
I mean, Android programming is at the point where I just need to write only 4 lines of code to ask the user to select an Image from his storage and retreive it and show it in an ImageView. Is there a TRUE simple way to take a picture, or do I really need to stop and lose a whole day of work to write all those lines of code?
EDIT: Take this page of the documentation: https://developer.android.com/training/camerax/architecture#kotlin It starts with this piece of code.
...ANSWER
Answered 2021-Feb-23 at 01:10Before you can interact with the device's cameras using CameraX, you need to initialize the library. The initialization process is asynchronous, and involves things like loading information about the device's cameras.
You interact with the device's cameras using a ProcessCameraProvider
. It's a Singleton, so the first time you get an instance of if, CameraX performs its initialization.
QUESTION
Disclaimer: I'm aware of the existence of this question, but it currently stands unresolved and I'm trying to provide extra information without polluting that one with useless answers that won't solve the problem anyway.
I have a custom device with a front camera that is mirrored by default, so I want to display the preview normally and I need to horizontally flip the content of PreviewView, but I'm stuck. Other people in the past have suggested using PreviewView#setScaleX(-1)
but it either doesn't work at all or it needs to be called at a very specific point in the code, which I haven't found yet.
The code below is a simplified version of CameraFragment.kt
in the official CameraXBasic example; I've added comments where I've already tired calling viewFinder.scaleX = -1f
with no success. Honestly I don't really think that the place makes a difference because if I call it with any value other than 1 it works fine with both scaleX
and scaleY
, but it always ignores the negative sign so it never flips.
ANSWER
Answered 2021-Jan-05 at 21:08Depending on the implementation type (COMPATIBLE
vs PERFORMANCE
) and the device, PreviewView
can either use a TextureView
or a SurfaceView
, in your case I'm assuming PreviewView
is using a SurfaceView
, you can confirm this by getting access to PreviewView
's first child view (View.getChildAt(0)
).
TextureView
is just like any other View
, which is why when PreviewView
uses it, setting its scaleX to -1 should mirror the displayed preview. You can call PreviewView.setScaleX(-1F)
once the layout is created (e.g. In onViewCreated()
).
With SurfaceView
, it's a bit tricky, as the Surface
and the View
are independent in some aspects: The Surface
is placed behind the window that holds the View
, and the View hierarchy handles correctly composing the entire layout by punching a hole in the window in order to display SurfaceView
's Surface
. This might explain why mirroring the content SurfaceView
displays isn't possible, though I'm not sure why zooming in (scaleX set to values > 1) and out (scaleX set to values between 0 and 1) work nonetheless.
QUESTION
I've updated my gradle plugins for CameraX kotlin and all of a sudden I've got an error that I don't know how to fix.
This is my camera fragment
...ANSWER
Answered 2020-Sep-21 at 13:36Since Camera-View 1.0.0-alpha16, createSurfaceProvider()
has been renamed to getSurfaceProvider()
Use:
QUESTION
I'm trying to implement the CameraX preview from the [Android developer site][1] I don't know why I'm getting this error even when I added the permissions in my manifests. When I open the QR scanner activity the preview is just black screen. I have updated to the latest version of cameraX and yet this issue was not solved. It seems that the permission for using camera was not granted. Please help me with it.
...ANSWER
Answered 2020-Dec-08 at 12:10Please make sure you have accepted camera permission in your app. you can manually check this by going to Settings > Apps > app_name > Permissions
and then setting all permissions to granted!
also add this line in your manifest file:
QUESTION
I'm trying to capture a picture with overlay included in image capture. I was able to set overlay to previewView
using cameraView.overlay.add(binding.textView)
. How ever, it did not save when trying to save an image with imageCapture
Only the picture was saved not the overlay. How do I save an image with overlay included using PreviewView
of camera x.
Please don't mark this as duplicate. I researched a lot and most of the example online are using the old camera
api which does not apply to camera x library. Any help is appreciated. Thanks in advance.
Here is my code
...ANSWER
Answered 2020-Nov-20 at 19:05You must overlay the text over the image yourself. I would suggest to use takePicture(Executor, …) that puts the Jpeg in memory; then, overlay your text using one of the libraries (not part of Android framework, neither of Jetpack), and save the result in file.
If you can compromise on image quality, you can draw the Jpeg on Bitmap canvas, and draw your text on top.
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Install ViewFinder
You can use ViewFinder like any standard Java library. Please include the the jar files in your classpath. You can also use any IDE and you can run and debug the ViewFinder component as you would do with any other Java program. Best practice is to use a build tool that supports dependency management such as Maven or Gradle. For Maven installation, please refer maven.apache.org. For Gradle installation, please refer gradle.org .
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