image-picker | Image Picker is a simple jQuery plugin | Plugin library
kandi X-RAY | image-picker Summary
kandi X-RAY | image-picker Summary
Image Picker is a simple jQuery plugin that transforms a select element into a more user friendly graphical interface.
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QUESTION
I have an app to create reports with some data and images (min 1 img, max 6). This reports keeps saved on my app, until user sent it to API (which can be done at the same day that he registered a report, or a week later).
But my question is: What's the proper way to store this images (I'm using Realm), is it saving the path (uri) or a base64 string? My current version keeps the base64 for this images (500 ~~ 800 kb img size), and then after my users send his reports to API, I deleted this base64 hash.
I was developing a way to save the path to the image, and then I display it. But image-picker uri returned is temporary. So to do this, I need to copy this file to another place, then save the path. But doing it, I got (for kind of 2 or 3 days) 2x images stored on phone (using memory).
So before I develop all this stuff, I was wondering, will it (copy image to another path then save path) be more performant that save base64 hash (to store at phone), or it shouldn't make much difference?
...ANSWER
Answered 2021-Apr-26 at 17:49I try to avoid text only answers; including code is best practice but the question about storing images comes up frequently and it's not really covered in the documentation so I thought it should be addressed at a high level.
Generally speaking, Realm is not a solution for storing blob type data - images, pdf's etc. There are a number of technical reasons for that but most importantly, an image can go well beyond the capacity of a Realm field. Additionally it can significantly impact performance (especially in a sync'ing use case)
If this is a local only app, storing the images on disk in the device and keep a reference to where they are (their path) stored in Realm. That will enable the app to be fast and responsive with a minimal footprint.
If this is a sync'd solution where you want to share images across devices or with other users, there are several cloud based solutions to accommodate image storage and then store a URL to the image in Realm.
One option is part of the MongoDB family of products (which also includes MongoDB Realm) called GridFS. Another option is a solid product we've leveraged for years is called Firebase Cloud Storage.
Now that I've made those statements, I'll backtrack just a bit and refer you to this article Realm Data and Partitioning Strategy Behind the WildAid O-FISH Mobile Apps which is a fantastic article about implementing Realm in a real-world use application and in particular how to deal with images.
In that article, note they do store the images in Realm for a short time. However, one thing they left out of that (which was revealed in a forum post) is that the images are compressed to ensure they don't go above the Realm field size limit.
I am not totally on board with general use of that technique but it works for that specific use case.
One more note: the image sizes mentioned in the question are pretty small (500 ~~ 800 kb img size) and that's a tiny amount of data which would really not have an impact, so storing them in realm as a data object would work fine. The caveat to that is future expansion; if you decide to later store larger images, it would require a complete re-write of the code; so why not plan for that up front.
QUESTION
In my react-native app, I using react-native-image-picker to pick image from camera or gallery. But the resource.uri returned in undefined in both launchCamera and launchImageLibrary. What am I doing wrong?
Here is my github repo of a basic build of the react-native app. The image picker code is in addProductScreen.js
...ANSWER
Answered 2021-Jun-03 at 16:01I saw your problem and I have a solution for you.
I don't know why but please try to use like this once response.assets[0].uri
QUESTION
I'm using the function below to upload images on zendesk. Zendesk requires image to be in binary to be uploaded and getting the blob image method is working when I'm uploading on Firebase. These function gets a response 201 but when you check the image, is just a white square. I think image got corrupted during the upload.
imageUri is returned from expo-image-picker like this below:
...file:/data/user/0/host.exp.exponent/cache/ExperienceData/.../ImagePicker/8543faa5-b996-46cd-9554-ce9afb61385b.jpg
ANSWER
Answered 2021-Jun-03 at 07:16After alot of testing, I was able to make it work. Posting here the answer I come up with incase someone else has the same problem.
QUESTION
This is the code which I use to upload images to firebase storage
...ANSWER
Answered 2021-May-23 at 14:16Change it to this
QUESTION
const Sell = ({navigation}) => { // sell page, user will be able to sell their OWNED foods.
let [visible, setVisible] = useState(false);
const [image, setImage] = useState(null);
const toggleOverlay = () => {
setVisible(!visible);
}
let openImagePickerAsync = async () => {
let permissionResult = await ImagePicker.requestMediaLibraryPermissionsAsync();
if (permissionResult.granted === false) {
alert("Permission to access camera roll is required!");
return;
}
let pickerResult = await ImagePicker.launchImageLibraryAsync();
if(pickerResult.cancelled === true) {
return;
}
setImage({localUri: pickerResult.uri});
}
if(image !== null) {
return (
);
}
return(
{image && }
Go back.
Create new listing
+
);
}
ANSWER
Answered 2021-May-23 at 07:16This error has to do with our most recent update to Expo Go on Android
Also a new version for the ExpoGo app has been released.
update your expo go app to Expo Go 2.19.6.
Read full coversation here
QUESTION
Using react native and expo, we want a user to be able to post a video or an image.
Here is the code:
...ANSWER
Answered 2021-May-19 at 02:36You should use pickerResult.type which would have video or image
You can refer the documentation
Returns If the user cancelled the picking, returns { cancelled: true }. Otherwise, this method returns information about the selected media item. When the chosen item is an image, this method returns { cancelled: false, type: 'image', uri, width, height, exif, base64 }; when the item is a video, this method returns { cancelled: false, type: 'video', uri, width, height, duration }.
QUESTION
I'm using Expo's bare-workflow for my react-native project. I'm using expo's push notification service. I keep getting the following error whenever I try to get my expo push token:
...ANSWER
Answered 2021-May-17 at 16:26So we figured it out.
We were using fetch-token-intercept which was adding our bearer token to calls going to expo, which meant validation was failing.
We modified the function to exclude calls to expo from including our bearer token and now the token is being retrieved successfully.
QUESTION
Im trying to use Multer to upload an array of images. At the client side i have a FormData called pictures.
pictures array, from react-native-image-picker:
...ANSWER
Answered 2021-May-13 at 18:45You need to give a count of files you expect to upload:
QUESTION
I was using expo-image-picker in my expo managed react native app. It was working fine. I just needed to use the camera to take new photo and to pick photo from gallery for my app. For these I was using the following APIs
...ANSWER
Answered 2021-May-12 at 11:16Got the solution. Actually there's no problem with my code. It is google who made me confused. Here's the detail https://github.com/expo/expo/issues/12603#issuecomment-827600227
QUESTION
I have been searching for a long time about how to enable users to select a group of images and upload them to the database through the image_picker.I was able to find my request in the following topic: enter link description here
And other similar topics on the site.
I tried to upload images to the database through the http package and php file. The code works and the attempt is successful, but the problem is that only one image is uploaded. How to solve this problem I need to upload all the images at once.
Code:
...ANSWER
Answered 2021-May-10 at 22:40You can use HTTP and MultipartFile
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