React Native Image Picker: Allowing your App to Pick Images from the Gallery and Camera (2024)

FAQs

How to pick images from camera & gallery in React Native app? ›

The first permission is to access the device's camera, and the second permission is to read or write to storage. This second option for the current demo app allows us to choose the image from the device's image gallery. That's it to install and configure an image picker library in a react native app.

React Native image picker simplifies the process of integrating image selection functionality into React Native applications. By using React Native image picker, we can enable users to choose and utilize images from their gallery or directly capture them using the camera.

A React Native module that allows you to use native UI to select a photo/video from the device library or directly from the camera, like so: iOS.

By using the captureImage() function of the useParticipant hook, you can capture an image of a local participant from their video stream. You have the option to specify the desired height and width in the captureImage() function; however, these parameters are optional.

So to ask permissions, React Native has a prebuilt feature in it which we can import and use it in our code. import { PermissionsAndroid } from 'react-native'; Before asking permissions to the user we have to declare that permissions in AndroidManifest. xml file.

The pickImage method opens the dialog to choose dialog and displays the mobile phone's gallery to select the image. The source arg states where the image is to be picked from. Here, the source is ImageSource. gallery , so that the image is selected from the user's phone gallery.

In this tutorial you will learn how to upload images from your React Native app to a server. We will use Expo to create the app and the ImagePicker and FileSystem modules to select and save images. The images will be saved to the file system of our app and uploaded to a server using the FileSystem. uploadAsync method.

How do I use image picker in Expo React Native? ›

expo-image-picker provides the launchImageLibraryAsync() method that displays the system UI for choosing an image or a video from the device's media library. We can use the button with the primary theme we created in the previous chapter to pick an image from the device's media library.

To handle image uploads we need to set the encoding type to multipart/form-data which means we need to format our data differently. Thus the createFormData function. This function will go ahead and take the image we selected and add it to the photo field of the form data with the required info.

Approach to create Image/Video Gallery App

Using the FlatList component, we load the assets from MediaLibrary. It gets the permission from user in the device. On getting the assets, we display the image and videos in different tabs using Buttons. We wrap the images with Pressable.

Adding the image

There are several different ways of inserting images in React. Using the <img/> tag you will need to provide it with two values: “src” (source): the URL or the path of the image. “alt” (alternate): an alternate text in case of the image not being available.

We create the openGallery method, where we set to define the options object, and call the launchImageGallery method. You can tweak these options and observe the response for better understanding. After the image is picked, the pickerResponse object will hold this asset and we access the image using uri.

import { Camera } from 'expo-camera'; Here, we import: Essential React hooks ( useState , useEffect , useRef ) for managing state and references. Components from React Native ( Text , View , Pressable ) for UI elements.