I have multiple graphs on my screen, however I want to share the image of graph on which i have clicked. I am using https://github.com/react-native-community/react-native-share to share the content and https://github.com/gre/react-native-view-shot to capture the entire screen. Is there is any way to capture the image on which i have clicked and get the uri.?
I think one possible solution is when the user clicked on the graph, you can navigate him to a new screen and send and send graph data as param to it. In the new screen display that specific graph using param data and take screenshot then.
and finally share it.
Related
I have used text input in creating a search bar on the 'HomeScreen'. Whenever I click on the search bar, it takes me to the 'SearchScreen' where text input is focussed.
In both screens, I have placeholder "Search" in the text input. The problem I am facing is that the placeholder flickers whenever screens are changed. This happens all the time if/when text input is re-rendered.
I want the placeholder to remain static there for smooth transition between screens. Please let me know if you have any idea on how to erect it or if you have any suggested workaround.
Take a look at this library Fluid Transitions. This library helps to create smooth transitions between screens and shared components. Thus, you can go from screen A to screen B maintaining you search bar input intact or at least keep it with a smooth transition.
Another idea is... Do you really need to move to another screen when focusing the search bar? Is it possible if you just create an SearchList component that "shows/hides" a FlatList (for example), when the user focus the search bar, it will change to another screen when the user clicks on a specific result.
I am using react-native-router-flux and here's some observation, previously I was using .replace() for switching scenes, this time I used .push(), customizing it to not show any animation and now search does not flicker when popping the search screen, however, it does flicker on pushing search screen onto the stack, seems like the re-render is causing flickering (as pop does not trigger a render but push does).
It's best to avoid using the placeholder as for now until the problem is sorted in react-native itself.
I have a GUI Builder created form in codename one, how can i open the camera in a resizable view at the show() of the form and place container like text area or anything else on it?
I saw the camera demo but i don't understand it very well because on the simulator it open a file picker.
My purpose is to create a form with a camera resizable capture when you have two labels and you can also write or paint on your photo used in background, I do this only for hobby and fun, i do what i can, Any advice is well accepted, thank you for the attenction
You can now place a component on top of a camera view with a new cn1lib: https://github.com/codenameone/CameraKitCodenameOne
Original answer below:
I'm assuming you mean overlay on a live camera view. While this is possible it's not supported at this time in the Java API layer.
If you mean grabbing a photo and setting it as a background for the form for overlay you can create an image with the result of the Capture API and use setBgImage() to set that image to the background of a component or form.
I've implemented a React Native component which shows an image loaded from a remote server. The user can swipe the image out of the screen in order to navigate to the next image which is again loaded from the remote server. While loading of the second image, the old image is still visible on the screen.
I want the old image to disappear while loading the next image. Any hint how to achieve this?
Prop defaultSource only works for initial render (showing the first image) but not consecutive images. So I guess React reuses the Image under the hood. I've played around with onLoadStart and onLoadEnd but I don't know how to reset the source of the old image.
Any idea?
Thanks.
Add a unique key prop to each image. It can be a number or a string. That will prevent React from re-using the elements.
Let's say I have an app built like the Microsoft weather app.
On launch of app I need to download the forecast from the internet. While waiting to do so I also need to display a progress indicator. Which of the following (if any) is recommended?
Render the page fully with navigation controls (hamburger side menu) as well as page content (but without values since they are data bound). Then overlay a modal control like a popup with a progress indicator inside and a cancel button.
Render only the application root shell with the progress indicator inside (no other content, or navigation controls like hamburger menu are visible). Then once the task is complete, navigate to the home page with content.
Render the home page with content and navigation controls, but hide only the content (with visibility = collapsed) and show a progress indicator in its place. Once data is downloaded hide the progress indicator, and show the content.
I don't know which one of these I'm supposed to use. Is there a recommended way to do this?
Or is there a better way I didn't think of?
There is no one perfect answer for this question but I will try to explain the most common solution. None of points above is good or bad. It is better to concentrate on the user experience.
Render fully page with navigation controls and display loading popup is not really bad idea - user see the whole page with progress ring for instance and has chance to cancel it. But remmber that if data is not loaded or user abort pulling it there will be empty content in the app (if this is first time when user launched the app).
One of the best solutions for scenario you wrote is to use extended Splash Screen. Once you app is launched first Splash Screen is displayed and when you extend it, you can add progress ring to indicate that data is being retrieved.
This is very elegant way to present to the user.
Please see below guidline how to do it:
UWP Extended splash screen
I am able to cature image (using AVFoundation), save image using assets library and save its asset url, open the camera roll programmatically using image picker.
What I want to do is, when I click on the a particular button, the last saved image of the camera roll should show up as if I had opened the camera roll and clicked on that image. I don't want to return the image object back to the program, i just want have a look at the image. And if I swipe on the screen, the camera roll images should scroll.
Also, can I do this using the saved asset url instead of just accessing the last saved image?
Also, If I press cancel there, i might want to return to the camera roll instead of my view controller. Would that be possible?
(I tried to search but i don't think i have the right keywords)
similar question here : Open camera roll on an exact photo
But no answer.