Download file android programmatically

What is the fastest launcher for Android? Call it as one of the best launchers for Android, Blackberry is efficient in organizing your home screen the way you want. Your email address will not be published. Save my name, email, and website in this browser for the next time I comment. Skip to content How do I access file manager in android programmatically? How do I launch file manager? Previous Previous. Recent site activity. Links SourceForge project. Browse the source.

Discussion group. Google code project. Issues tracker. Blog cwhuang. Blog sceners. Blog beyounn. Blog android-x RSS for main page. Developers Google apps. Google sites. Table of Contents. Save Article. Improve Article. Like Article. Last Updated : 23 May, Button button;. DownloadManager manager;. By getting a reference to the selected item's URI, your app can perform several operations on the item. For example, you can access the item's metadata, edit the item in place, and delete the item.

Different content providers allow for different operations to be performed on documents—such as copying the document or viewing a document's thumbnail. To determine which operations a given provider supports, check the value of Document.

Your app's UI can then show only the options that the provider supports. When your app opens a file for reading or writing, the system gives your app a URI permission grant for that file, which lasts until the user's device restarts. Suppose, however, that your app is an image-editing app, and you want users to be able to access the 5 images that they most recently edited, directly from your app.

If the user's device has restarted, you'd have to send the user back to the system picker to find the files. To preserve access to files across device restarts and create a better user experience, your app can "take" the persistable URI permission grant that the system offers, as shown in the following code snippet:. When you have the URI for a document, you gain access to its metadata. This snippet grabs the metadata for a document specified by the URI, and logs it:.

By having a reference to a document's URI, you can open a document for further processing. This section shows examples for opening a bitmap and an input stream. The following code snippet shows how to open a Bitmap file given its URI:. After you open the bitmap, you can display it in an ImageView. In this snippet, the lines of the file are being read into a string:. If you have the URI for a document and the document's Document. For example:.

The 2 URIs refer to the same underlying item. Using the media store URI, you can more easily access media files from shared storage. On Android 7. To open virtual files, your client app needs to include special logic to handle them.

If you want to get a byte representation of the file—to preview the file, for example—you need to request for an alternate MIME type from the documents provider. After the user makes a selection, use the URI in the results data to determine whether the file is virtual, as shown in the following code snippet:. The following code snippet shows how to check whether a virtual file can be represented as an image, and if so, gets an input stream from the virtual file:.

For more information about how to store and access documents and other files, consult the following resources. Content and code samples on this page are subject to the licenses described in the Content License.

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