Android Image View & Download Tutorial. Android Image View & Download Demo. Android Image View & Download Example. Image Downloader is an useful app help you search and download the images from Internet. How to use: 1. Tap on search top toolbar or bottom floating button.
Cloud Storage allows developers to quickly and easily download files from a bucket provided and managed by Firebase. Note: By default, Cloud Storage buckets require Firebase Authentication to download files. You can to allow unauthenticated access. Since the default Google App Engine app and Firebase share this bucket, configuring public access may make newly uploaded App Engine files publicly accessible as well.
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Be sure to restrict access to your Storage bucket again when you set up authentication. Create a Reference To download a file, first to the file you want to download. You can create a reference by appending child paths to the storage root, or you can create a reference from an existing gs:// or URL referencing an object in Cloud Storage. Java Android // Create a storage reference from our app StorageReference storageRef = storage.getReference; // Create a reference with an initial file path and name StorageReference pathReference = storageRef.child('images/stars.jpg'); // Create a reference to a file from a Google Cloud Storage URI StorageReference gsReference = storage.getReferenceFromUrl('gs://bucket/images/stars.jpg'); // Create a reference from an HTTPS URL // Note that in the URL, characters are URL escaped!
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StorageReference httpsReference = storage.getReferenceFromUrl('https://firebasestorage.googleapis.com/b/bucket/o/images%20stars.jpg'). Kotlin Android // Create a storage reference from our app val storageRef = storage.reference // Create a reference with an initial file path and name val pathReference = storageRef.child('images/stars.jpg') // Create a reference to a file from a Google Cloud Storage URI val gsReference = storage.getReferenceFromUrl('gs://bucket/images/stars.jpg') // Create a reference from an HTTPS URL // Note that in the URL, characters are URL escaped! Val httpsReference = storage.getReferenceFromUrl( 'https://firebasestorage.googleapis.com/b/bucket/o/images%20stars.jpg').
Download Files Once you have a reference, you can download files from Cloud Storage by calling the getBytes or getStream. If you prefer to download the file with another library, you can get a download URL with getDownloadUrl.
Download in memory Download the file to a byte with the getBytes method. This is the easiest way to download a file, but it must load the entire contents of your file into memory. If you request a file larger than your app's available memory, your app will crash. To protect against memory issues, getBytes takes a maximum amount of bytes to download.
Set the maximum size to something you know your app can handle, or use another download method. Handle Activity Lifecycle Changes Downloads continue in the background even after changes (such as presenting a dialog or rotating the screen). Any listeners you had attached will also remain attached. This could cause unexpected results if they get called after the activity is stopped. You can solve this problem by subscribing your listeners with an activity scope to automatically unregister them when the activity stops.
Then, use the getActiveDownloadTasks method when the activity restarts to obtain download tasks that are still running or recently completed. The example below demonstrates this and also shows how to persist the storage reference path used.