It depends upon different phones. If these does not work then we use InputStream functions. This doesn't work, I replaced my FileUtils with the one you mentioned in the link. I then replaced the DowloadsProvider section with what you provided above.
Getting exception or empty without any exception? Also, i haven't tested with removable sd card. BipinBharti here is answers to your question github. Show 11 more comments. This solution helped me to get right filename. Thank you! Add a comment. Only alternative way is redirect user to settings of Download Manager Application. Anisuzzaman Babla Anisuzzaman Babla 5, 4 4 gold badges 31 31 silver badges 55 55 bronze badges. So PathUtil. The text was updated successfully, but these errors were encountered:.
And I forgot to say a big thanks to your excellent article. Sorry, something went wrong. Hello tamo , Thanks for kind words :. As for the issue, I managed to reproduce it by downloading a video file via the Chrome app on Android 10 emulator. Unfortunately, just skipping the 'msf:' part doesn't help to make a proper Uri that could lead us to a file path.
That is why I decided to just fallback to the File Descriptor in this case. The code change is already merged. Thanks for pointing this thing out. Soon I'll make a new release with this change. Thanks for the fix. Yes, I downloaded movie files via Chrome. MotionLayout XML reference. Improving layout performance. Custom view components. Look and feel. Splash screens. Add the app bar. Control the system UI visibility. Supporting swipe-to-refresh.
Pop-up messages overview. Adding search functionality. Creating backward-compatible UIs. Home channels for mobile apps. App widgets. Media app architecture. Building an audio app. Building a video app. The Google Assistant.
Routing between devices. Background tasks. Manage device awake state. Save to shared storage. Save data in a local database. Sharing simple data. Sharing files. Sharing files with NFC. Printing files. Content providers.
Autofill framework. Contacts provider. Data backup. Remember and authenticate users. User location. Using touch gestures. Handling keyboard input. Supporting game controllers. Input method editors. Performing network operations. Transmit network data using Volley. Perform network operations using Cronet. Transferring data without draining the battery. Reduce network battery drain. Transfer data using Sync Adapters. Bluetooth Low Energy. Wi-Fi infrastructure. Discover and connect. Runtime API reference.
Web-based content. Android App Bundles. Google Play. Play Asset Delivery. Play Feature Delivery. Relationship between content provider and other components.
When you want to access data in a content provider, you use the ContentResolver object in your application's Context to communicate with the provider as a client. The ContentResolver object communicates with the provider object, an instance of a class that implements ContentProvider. The provider object receives data requests from clients, performs the requested action, and returns the results. This object has methods that call identically-named methods in the provider object, an instance of one of the concrete subclasses of ContentProvider.
The ContentResolver methods provide the basic "CRUD" create, retrieve, update, and delete functions of persistent storage. A common pattern for accessing a ContentProvider from your UI uses a CursorLoader to run an asynchronous query in the background. This allows the UI to continue to be available to the user while the query is running. This pattern involves the interaction of a number of different objects, as well as the underlying storage mechanism, as illustrated in figure 2.
Figure 2. Interaction between ContentProvider, other classes, and storage. Note: To access a provider, your application usually has to request specific permissions in its manifest file. This development pattern is described in more detail in the section Content Provider Permissions.
One of the built-in providers in the Android platform is the user dictionary, which stores the spellings of non-standard words that the user wants to keep. Table 1 illustrates what the data might look like in this provider's table:. In table 1, each row represents an instance of a word that might not be found in a standard dictionary.
Each column represents some data for that word, such as the locale in which it was first encountered. The column headers are column names that are stored in the provider. To refer to a row's locale, you refer to its locale column. To get a list of the words and their locales from the User Dictionary Provider, you call ContentResolver. The query method calls the ContentProvider. The following lines of code show a ContentResolver.
Content URIs include the symbolic name of the entire provider its authority and a name that points to a table a path. When you call a client method to access a table in a provider, the content URI for the table is one of the arguments. The ContentResolver object parses out the URI's authority, and uses it to "resolve" the provider by comparing the authority to a system table of known providers. The ContentResolver can then dispatch the query arguments to the correct provider.
A provider usually has a path for each table it exposes. Many providers allow you to access a single row in a table by appending an ID value to the end of the URI. You often use id values when you've retrieved a set of rows and then want to update or delete one of them.
Note: The Uri and Uri. Builder classes contain convenience methods for constructing well-formed URI objects from strings. This section describes how to retrieve data from a provider, using the User Dictionary Provider as an example. For the sake of clarity, the code snippets in this section call ContentResolver.
In actual code, however, you should do queries asynchronously on a separate thread. One way to do this is to use the CursorLoader class, which is described in more detail in the Loaders guide.
Also, the lines of code are snippets only; they don't show a complete application. To retrieve data from a provider, your application needs "read access permission" for the provider. When you specify this element in your manifest, you are in effect "requesting" this permission for your application.
When users install your application, they implicitly grant this request. To find the exact name of the read access permission for the provider you're using, as well as the names for other access permissions used by the provider, look in the provider's documentation. The role of permissions in accessing providers is described in more detail in the section Content provider permissions. The User Dictionary Provider defines the permission android.
The next step in retrieving data from a provider is to construct a query. This first snippet defines some variables for accessing the User Dictionary Provider:. The next snippet shows how to use ContentResolver. A provider client query is similar to an SQL query, and it contains a set of columns to return, a set of selection criteria, and a sort order. The set of columns that the query should return is called a projection the variable mProjection. The expression that specifies the rows to retrieve is split into a selection clause and selection arguments.
The selection clause is a combination of logical and Boolean expressions, column names, and values the variable mSelectionClause. If you specify the replaceable parameter? In the next snippet, if the user doesn't enter a word, the selection clause is set to null , and the query returns all the words in the provider. If the user enters a word, the selection clause is set to UserDictionary.
In this SQL statement, the actual column names are used instead of contract class constants. Since the selection clause is treated as an SQL statement, this might cause the provider to erase all of the tables in the underlying SQLite database unless the provider is set up to catch SQL injection attempts. To avoid this problem, use a selection clause that uses? When you do this, the user input is bound directly to the query rather than being interpreted as part of an SQL statement.
Instead of using concatenation to include the user input, use this selection clause:. A selection clause that uses? The ContentResolver. A Cursor object provides random read access to the rows and columns it contains.
Using Cursor methods, you can iterate over the rows in the results, determine the data type of each column, get the data out of a column, and examine other properties of the results. Some Cursor implementations automatically update the object when the provider's data changes, or trigger methods in an observer object when the Cursor changes, or both. Note: A provider may restrict access to columns based on the nature of the object making the query. For example, the Contacts Provider restricts access for some columns to sync adapters, so it won't return them to an activity or service.
If no rows match the selection criteria, the provider returns a Cursor object for which Cursor. If an internal error occurs, the results of the query depend on the particular provider. It may choose to return null , or it may throw an Exception. Since a Cursor is a "list" of rows, a good way to display the contents of a Cursor is to link it to a ListView via a SimpleCursorAdapter. The following snippet continues the code from the previous snippet.
It creates a SimpleCursorAdapter object containing the Cursor retrieved by the query, and sets this object to be the adapter for a ListView :. Rather than simply displaying query results, you can use them for other tasks. For example, you can retrieve spellings from the user dictionary and then look them up in other providers. To do this, you iterate over the rows in the Cursor :. Cursor implementations contain several "get" methods for retrieving different types of data from the object.
For example, the previous snippet uses getString. They also have a getType method that returns a value indicating the data type of the column. A provider's application can specify permissions that other applications must have in order to access the provider's data. These permissions ensure that the user knows what data an application will try to access. Based on the provider's requirements, other applications request the permissions they need in order to access the provider.
End users see the requested permissions when they install the application. If a provider's application doesn't specify any permissions, then other applications have no access to the provider's data, unless the provider is exported.
Additionally, components in the provider's application always have full read and write access, regardless of the specified permissions. As noted previously, the User Dictionary Provider requires the android. The provider has the separate android. When the Android Package Manager installs the application, a user must approve all of the permissions the application requests.
If the user approves all of them, Package Manager continues the installation; if the user doesn't approve them, Package Manager aborts the installation. The impact of permissions on provider access is explained in more detail in the Security and permissions guide. In the same way that you retrieve data from a provider, you also use the interaction between a provider client and the provider's ContentProvider to modify data. You call a method of ContentResolver with arguments that are passed to the corresponding method of ContentProvider.
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