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Summary: Nested Classes | Constants | Methods | Inherited Methods

# DownloadManager

`public class DownloadManager`
`extends Object` ``

java.lang.Object
↳ | android.app.DownloadManager

The download manager is a system service that handles long-running HTTP downloads. Clients may request that a URI be downloaded to a particular destination file. The download manager will conduct the download in the background, taking care of HTTP interactions and retrying downloads after failures or across connectivity changes and system reboots.

Apps that request downloads through this API should register a broadcast receiver for `ACTION_NOTIFICATION_CLICKED` to appropriately handle when the user clicks on a running download in a notification or from the downloads UI.

Note that the application must have the `Manifest.permission.INTERNET` permission to use this class.

## Summary

### Nested classes
`class` | `DownloadManager.Query` This class may be used to filter download manager queries.
`class` | `DownloadManager.Request` This class contains all the information necessary to request a new download.

### Constants
`String` | `ACTION_DOWNLOAD_COMPLETE` Broadcast intent action sent by the download manager when a download completes.
`String` | `ACTION_NOTIFICATION_CLICKED` Broadcast intent action sent by the download manager when the user clicks on a running download, either from a system notification or from the downloads UI.
`String` | `ACTION_VIEW_DOWNLOADS` Intent action to launch an activity to display all downloads.
`String` | `COLUMN_BYTES_DOWNLOADED_SO_FAR` Number of bytes download so far.
`String` | `COLUMN_DESCRIPTION` The client-supplied description of this download.
`String` | `COLUMN_ID` An identifier for a particular download, unique across the system.
`String` | `COLUMN_LAST_MODIFIED_TIMESTAMP` Timestamp when the download was last modified, in `System.currentTimeMillis()` (wall clock time in UTC).
`String` | `COLUMN_LOCAL_FILENAME` This constant is deprecated. apps should transition to using `ContentResolver#openFileDescriptor(Uri, String)` instead.
`String` | `COLUMN_LOCAL_URI` Uri where downloaded file will be stored.
`String` | `COLUMN_MEDIAPROVIDER_URI` The URI to the corresponding entry in MediaProvider for this downloaded entry.
`String` | `COLUMN_MEDIA_TYPE` Internet Media Type of the downloaded file.
`String` | `COLUMN_REASON` Provides more detail on the status of the download.
`String` | `COLUMN_STATUS` Current status of the download, as one of the STATUS_* constants.
`String` | `COLUMN_TITLE` The client-supplied title for this download.
`String` | `COLUMN_TOTAL_SIZE_BYTES` Total size of the download in bytes.
`String` | `COLUMN_URI` URI to be downloaded.
`int` | `ERROR_CANNOT_RESUME` Value of `COLUMN_REASON` when some possibly transient error occurred but we can't resume the download.
`int` | `ERROR_DEVICE_NOT_FOUND` Value of `COLUMN_REASON` when no external storage device was found.
`int` | `ERROR_FILE_ALREADY_EXISTS` Value of `COLUMN_REASON` when the requested destination file already exists (the download manager will not overwrite an existing file).
`int` | `ERROR_FILE_ERROR` Value of `COLUMN_REASON` when a storage issue arises which doesn't fit under any other error code.
`int` | `ERROR_HTTP_DATA_ERROR` Value of `COLUMN_REASON` when an error receiving or processing data occurred at the HTTP level.
`int` | `ERROR_INSUFFICIENT_SPACE` Value of `COLUMN_REASON` when there was insufficient storage space.
`int` | `ERROR_TOO_MANY_REDIRECTS` Value of `COLUMN_REASON` when there were too many redirects.
`int` | `ERROR_UNHANDLED_HTTP_CODE` Value of `COLUMN_REASON` when an HTTP code was received that download manager can't handle.
`int` | `ERROR_UNKNOWN` Value of COLUMN_ERROR_CODE when the download has completed with an error that doesn't fit under any other error code.
`String` | `EXTRA_DOWNLOAD_ID` Intent extra included with `ACTION_DOWNLOAD_COMPLETE` intents, indicating the ID (as a long) of the download that just completed.
`String` | `EXTRA_NOTIFICATION_CLICK_DOWNLOAD_IDS` When clicks on multiple notifications are received, the following provides an array of download ids corresponding to the download notification that was clicked.
`String` | `INTENT_EXTRAS_SORT_BY_SIZE` Intent extra included with `ACTION_VIEW_DOWNLOADS` to start DownloadApp in sort-by-size mode.
`int` | `PAUSED_QUEUED_FOR_WIFI` Value of `COLUMN_REASON` when the download exceeds a size limit for downloads over the mobile network and the download manager is waiting for a Wi-Fi connection to proceed.
`int` | `PAUSED_UNKNOWN` Value of `COLUMN_REASON` when the download is paused for some other reason.
`int` | `PAUSED_WAITING_FOR_NETWORK` Value of `COLUMN_REASON` when the download is waiting for network connectivity to proceed.
`int` | `PAUSED_WAITING_TO_RETRY` Value of `COLUMN_REASON` when the download is paused because some network error occurred and the download manager is waiting before retrying the request.
`int` | `STATUS_FAILED` Value of `COLUMN_STATUS` when the download has failed (and will not be retried).
`int` | `STATUS_PAUSED` Value of `COLUMN_STATUS` when the download is waiting to retry or resume.
`int` | `STATUS_PENDING` Value of `COLUMN_STATUS` when the download is waiting to start.
`int` | `STATUS_RUNNING` Value of `COLUMN_STATUS` when the download is currently running.
`int` | `STATUS_SUCCESSFUL` Value of `COLUMN_STATUS` when the download has successfully completed.

### Public methods
`long` | `addCompletedDownload(String title, String description, boolean isMediaScannerScannable, String mimeType, String path, long length, boolean showNotification)` This method is deprecated. Apps should instead contribute files to `MediaStore.Downloads` collection to make them available to user as part of Downloads.
`long` | `addCompletedDownload(String title, String description, boolean isMediaScannerScannable, String mimeType, String path, long length, boolean showNotification, Uri uri, Uri referer)` This method is deprecated. Apps should instead contribute files to `MediaStore.Downloads` collection to make them available to user as part of Downloads.
`long` | `enqueue(DownloadManager.Request request)` Enqueue a new download.
`static Long` | `getMaxBytesOverMobile(Context context)` Returns maximum size, in bytes, of downloads that may go over a mobile connection; or null if there's no limit
`String` | `getMimeTypeForDownloadedFile(long id)` Returns the media type of the given downloaded file id, if the file was downloaded successfully.
`static Long` | `getRecommendedMaxBytesOverMobile(Context context)` Returns recommended maximum size, in bytes, of downloads that may go over a mobile connection; or null if there's no recommended limit.
`Uri` | `getUriForDownloadedFile(long id)` Returns the `Uri` of the given downloaded file id, if the file is downloaded successfully.
`ParcelFileDescriptor` | `openDownloadedFile(long id)` Open a downloaded file for reading.
`Cursor` | `query(DownloadManager.Query query)` Query the download manager about downloads that have been requested.
`int` | `remove(long... ids)` Cancel downloads and remove them from the download manager.

### Inherited methods
From class `java.lang.Object`
`Object` | `clone()` Creates and returns a copy of this object.
`boolean` | `equals(Object obj)` Indicates whether some other object is "equal to" this one.
`void` | `finalize()` Called by the garbage collector on an object when garbage collection determines that there are no more references to the object.
`final Class<?>` | `getClass()` Returns the runtime class of this `Object`.
`int` | `hashCode()` Returns a hash code value for the object.
`final void` | `notify()` Wakes up a single thread that is waiting on this object's monitor.
`final void` | `notifyAll()` Wakes up all threads that are waiting on this object's monitor.
`String` | `toString()` Returns a string representation of the object.
`final void` | `wait(long timeout, int nanos)` Causes the current thread to wait until another thread invokes the `notify()` method or the `notifyAll()` method for this object, or some other thread interrupts the current thread, or a certain amount of real time has elapsed.
`final void` | `wait(long timeout)` Causes the current thread to wait until either another thread invokes the `notify()` method or the `notifyAll()` method for this object, or a specified amount of time has elapsed.
`final void` | `wait()` Causes the current thread to wait until another thread invokes the `notify()` method or the `notifyAll()` method for this object.

## Constants

### ACTION_DOWNLOAD_COMPLETE

    public static final String ACTION_DOWNLOAD_COMPLETE

Broadcast intent action sent by the download manager when a download completes.

Constant Value: "android.intent.action.DOWNLOAD_COMPLETE"

### ACTION_NOTIFICATION_CLICKED

    public static final String ACTION_NOTIFICATION_CLICKED

Broadcast intent action sent by the download manager when the user clicks on a running download, either from a system notification or from the downloads UI.

Constant Value: "android.intent.action.DOWNLOAD_NOTIFICATION_CLICKED"

### ACTION_VIEW_DOWNLOADS

    public static final String ACTION_VIEW_DOWNLOADS

Intent action to launch an activity to display all downloads.

Constant Value: "android.intent.action.VIEW_DOWNLOADS"

### COLUMN_BYTES_DOWNLOADED_SO_FAR

    public static final String COLUMN_BYTES_DOWNLOADED_SO_FAR

Number of bytes download so far.

Constant Value: "bytes_so_far"

### COLUMN_DESCRIPTION

    public static final String COLUMN_DESCRIPTION

The client-supplied description of this download. This will be displayed in system notifications. Defaults to the empty string.

Constant Value: "description"

### COLUMN_ID

    public static final String COLUMN_ID

An identifier for a particular download, unique across the system. Clients use this ID to make subsequent calls related to the download.

Constant Value: "_id"

### COLUMN_LAST_MODIFIED_TIMESTAMP

    public static final String COLUMN_LAST_MODIFIED_TIMESTAMP

Timestamp when the download was last modified, in `System.currentTimeMillis()` (wall clock time in UTC).

Constant Value: "last_modified_timestamp"

### COLUMN_LOCAL_FILENAME

    public static final String COLUMN_LOCAL_FILENAME

This constant is deprecated.
apps should transition to using `ContentResolver#openFileDescriptor(Uri, String)` instead.

Path to the downloaded file on disk.

Note that apps may not have filesystem permissions to directly access this path. Instead of trying to open this path directly, apps should use `ContentResolver#openFileDescriptor(Uri, String)` to gain access.

Constant Value: "local_filename"

### COLUMN_LOCAL_URI

    public static final String COLUMN_LOCAL_URI

Uri where downloaded file will be stored. If a destination is supplied by client, that URI will be used here. Otherwise, the value will initially be null and will be filled in with a generated URI once the download has started.

Constant Value: "local_uri"

### COLUMN_MEDIAPROVIDER_URI

    public static final String COLUMN_MEDIAPROVIDER_URI

The URI to the corresponding entry in MediaProvider for this downloaded entry. It is used to delete the entries from MediaProvider database when it is deleted from the downloaded list.

Constant Value: "mediaprovider_uri"

### COLUMN_MEDIA_TYPE

    public static final String COLUMN_MEDIA_TYPE

Internet Media Type of the downloaded file. If no value is provided upon creation, this will initially be null and will be filled in based on the server's response once the download has started.

See also:

- RFC 1590, defining Media Types

Constant Value: "media_type"

### COLUMN_REASON

    public static final String COLUMN_REASON

Provides more detail on the status of the download. Its meaning depends on the value of `COLUMN_STATUS`. When `COLUMN_STATUS` is `STATUS_FAILED`, this indicates the type of error that occurred. If an HTTP error occurred, this will hold the HTTP status code as defined in RFC 2616. Otherwise, it will hold one of the ERROR_* constants. When `COLUMN_STATUS` is `STATUS_PAUSED`, this indicates why the download is paused. It will hold one of the PAUSED_* constants. If `COLUMN_STATUS` is neither `STATUS_FAILED` nor `STATUS_PAUSED`, this column's value is undefined.

See also:

- RFC 2616 status codes

Constant Value: "reason"

### COLUMN_STATUS

    public static final String COLUMN_STATUS

Current status of the download, as one of the STATUS_* constants.

Constant Value: "status"

### COLUMN_TITLE

    public static final String COLUMN_TITLE

The client-supplied title for this download. This will be displayed in system notifications. Defaults to the empty string.

Constant Value: "title"

### COLUMN_TOTAL_SIZE_BYTES

    public static final String COLUMN_TOTAL_SIZE_BYTES

Total size of the download in bytes. This will initially be -1 and will be filled in once the download starts.

Constant Value: "total_size"

### COLUMN_URI

    public static final String COLUMN_URI

URI to be downloaded.

Constant Value: "uri"

### ERROR_CANNOT_RESUME

    public static final int ERROR_CANNOT_RESUME

Value of `COLUMN_REASON` when some possibly transient error occurred but we can't resume the download.

Constant Value: 1008 (0x000003f0)

### ERROR_DEVICE_NOT_FOUND

    public static final int ERROR_DEVICE_NOT_FOUND

Value of `COLUMN_REASON` when no external storage device was found. Typically, this is because the SD card is not mounted.

Constant Value: 1007 (0x000003ef)

### ERROR_FILE_ALREADY_EXISTS

    public static final int ERROR_FILE_ALREADY_EXISTS

Value of `COLUMN_REASON` when the requested destination file already exists (the download manager will not overwrite an existing file).

Constant Value: 1009 (0x000003f1)

### ERROR_FILE_ERROR

    public static final int ERROR_FILE_ERROR

Value of `COLUMN_REASON` when a storage issue arises which doesn't fit under any other error code. Use the more specific `ERROR_INSUFFICIENT_SPACE` and `ERROR_DEVICE_NOT_FOUND` when appropriate.

Constant Value: 1001 (0x000003e9)

### ERROR_HTTP_DATA_ERROR

    public static final int ERROR_HTTP_DATA_ERROR

Value of `COLUMN_REASON` when an error receiving or processing data occurred at the HTTP level.

Constant Value: 1004 (0x000003ec)

### ERROR_INSUFFICIENT_SPACE

    public static final int ERROR_INSUFFICIENT_SPACE

Value of `COLUMN_REASON` when there was insufficient storage space. Typically, this is because the SD card is full.

Constant Value: 1006 (0x000003ee)

### ERROR_TOO_MANY_REDIRECTS

    public static final int ERROR_TOO_MANY_REDIRECTS

Value of `COLUMN_REASON` when there were too many redirects.

Constant Value: 1005 (0x000003ed)

### ERROR_UNHANDLED_HTTP_CODE

    public static final int ERROR_UNHANDLED_HTTP_CODE

Value of `COLUMN_REASON` when an HTTP code was received that download manager can't handle.

Constant Value: 1002 (0x000003ea)

### ERROR_UNKNOWN

    public static final int ERROR_UNKNOWN

Value of COLUMN_ERROR_CODE when the download has completed with an error that doesn't fit under any other error code.

Constant Value: 1000 (0x000003e8)

### EXTRA_DOWNLOAD_ID

    public static final String EXTRA_DOWNLOAD_ID

Intent extra included with `ACTION_DOWNLOAD_COMPLETE` intents, indicating the ID (as a long) of the download that just completed.

Constant Value: "extra_download_id"

### EXTRA_NOTIFICATION_CLICK_DOWNLOAD_IDS

    public static final String EXTRA_NOTIFICATION_CLICK_DOWNLOAD_IDS

When clicks on multiple notifications are received, the following provides an array of download ids corresponding to the download notification that was clicked. It can be retrieved by the receiver of this Intent using `Intent.getLongArrayExtra(String)`.

Constant Value: "extra_click_download_ids"

### INTENT_EXTRAS_SORT_BY_SIZE

    public static final String INTENT_EXTRAS_SORT_BY_SIZE

Intent extra included with `ACTION_VIEW_DOWNLOADS` to start DownloadApp in sort-by-size mode.

Constant Value: "android.app.DownloadManager.extra_sortBySize"

### PAUSED_QUEUED_FOR_WIFI

    public static final int PAUSED_QUEUED_FOR_WIFI

Value of `COLUMN_REASON` when the download exceeds a size limit for downloads over the mobile network and the download manager is waiting for a Wi-Fi connection to proceed.

Constant Value: 3 (0x00000003)

### PAUSED_UNKNOWN

    public static final int PAUSED_UNKNOWN

Value of `COLUMN_REASON` when the download is paused for some other reason.

Constant Value: 4 (0x00000004)

### PAUSED_WAITING_FOR_NETWORK

    public static final int PAUSED_WAITING_FOR_NETWORK

Value of `COLUMN_REASON` when the download is waiting for network connectivity to proceed.

Constant Value: 2 (0x00000002)

### PAUSED_WAITING_TO_RETRY

    public static final int PAUSED_WAITING_TO_RETRY

Value of `COLUMN_REASON` when the download is paused because some network error occurred and the download manager is waiting before retrying the request.

Constant Value: 1 (0x00000001)

### STATUS_FAILED

    public static final int STATUS_FAILED

Value of `COLUMN_STATUS` when the download has failed (and will not be retried).

Constant Value: 16 (0x00000010)

### STATUS_PAUSED

    public static final int STATUS_PAUSED

Value of `COLUMN_STATUS` when the download is waiting to retry or resume.

Constant Value: 4 (0x00000004)

### STATUS_PENDING

    public static final int STATUS_PENDING

Value of `COLUMN_STATUS` when the download is waiting to start.

Constant Value: 1 (0x00000001)

### STATUS_RUNNING

    public static final int STATUS_RUNNING

Value of `COLUMN_STATUS` when the download is currently running.

Constant Value: 2 (0x00000002)

### STATUS_SUCCESSFUL

    public static final int STATUS_SUCCESSFUL

Value of `COLUMN_STATUS` when the download has successfully completed.

Constant Value: 8 (0x00000008)

## Public methods

### addCompletedDownload

    public long addCompletedDownload (String title,
                    String description,
                    boolean isMediaScannerScannable,
                    String mimeType,
                    String path,
                    long length,
                    boolean showNotification)

This method is deprecated.
Apps should instead contribute files to `MediaStore.Downloads` collection to make them available to user as part of Downloads.

Adds a file to the downloads database system, so it could appear in Downloads App (and thus become eligible for management by the Downloads App).

It is helpful to make the file scannable by MediaScanner by setting the param isMediaScannerScannable to true. It makes the file visible in media managing applications such as Gallery App, which could be a useful purpose of using this API.

For applications targeting `Build.VERSION_CODES.Q` or above, `path` must be within directories owned by the application {e.g. `Context#getExternalFilesDir(String)`} or if the application is running under the legacy storage model (see `android:requestLegacyExternalStorage`), `path` can also be within the top-level Downloads directory (as returned by `Environment#getExternalStoragePublicDirectory(String)` with `Environment#DIRECTORY_DOWNLOADS`).

Parameters
`title` | `String`: the title that would appear for this file in Downloads App.
`description` | `String`: the description that would appear for this file in Downloads App.
`isMediaScannerScannable` | `boolean`: true if the file is to be scanned by MediaScanner. Files scanned by MediaScanner appear in the applications used to view media (for example, Gallery app).
`mimeType` | `String`: mimetype of the file.
`path` | `String`: absolute pathname to the file. The file should be world-readable, so that it can be managed by the Downloads App and any other app that is used to read it (for example, Gallery app to display the file, if the file contents represent a video/image).
`length` | `long`: length of the downloaded file
`showNotification` | `boolean`: true if a notification is to be sent, false otherwise

Returns
`long` | an ID for the download entry added to the downloads app, unique across the system This ID is used to make future calls related to this download.

### addCompletedDownload

    public long addCompletedDownload (String title,
                    String description,
                    boolean isMediaScannerScannable,
                    String mimeType,
                    String path,
                    long length,
                    boolean showNotification,
                    Uri uri,
                    Uri referer)

This method is deprecated.
Apps should instead contribute files to `MediaStore.Downloads` collection to make them available to user as part of Downloads.

Adds a file to the downloads database system, so it could appear in Downloads App (and thus become eligible for management by the Downloads App).

It is helpful to make the file scannable by MediaScanner by setting the param isMediaScannerScannable to true. It makes the file visible in media managing applications such as Gallery App, which could be a useful purpose of using this API.

For applications targeting `Build.VERSION_CODES.Q` or above, `path` must be within directories owned by the application {e.g. `Context#getExternalFilesDir(String)`} or if the application is running under the legacy storage model (see `android:requestLegacyExternalStorage`), `path` can also be within the top-level Downloads directory (as returned by `Environment#getExternalStoragePublicDirectory(String)` with `Environment#DIRECTORY_DOWNLOADS`).

Parameters
`title` | `String`: the title that would appear for this file in Downloads App.
`description` | `String`: the description that would appear for this file in Downloads App.
`isMediaScannerScannable` | `boolean`: true if the file is to be scanned by MediaScanner. Files scanned by MediaScanner appear in the applications used to view media (for example, Gallery app).
`mimeType` | `String`: mimetype of the file.
`path` | `String`: absolute pathname to the file. The file should be world-readable, so that it can be managed by the Downloads App and any other app that is used to read it (for example, Gallery app to display the file, if the file contents represent a video/image).
`length` | `long`: length of the downloaded file
`showNotification` | `boolean`: true if a notification is to be sent, false otherwise
`uri` | `Uri`: the original HTTP URI of the download
`referer` | `Uri`: the HTTP Referer for the download

Returns
`long` | an ID for the download entry added to the downloads app, unique across the system This ID is used to make future calls related to this download.

### enqueue

    public long enqueue (DownloadManager.Request request)

Enqueue a new download. The download will start automatically once the download manager is ready to execute it and connectivity is available.

Parameters
`request` | `DownloadManager.Request`: the parameters specifying this download

Returns
`long` | an ID for the download, unique across the system. This ID is used to make future calls related to this download.

### getMaxBytesOverMobile

    public static Long getMaxBytesOverMobile (Context context)

Returns maximum size, in bytes, of downloads that may go over a mobile connection; or null if there's no limit

Parameters
`context` | `Context`: the `Context` to use for accessing the `ContentResolver`

Returns
`Long` | maximum size, in bytes, of downloads that may go over a mobile connection; or null if there's no limit

### getMimeTypeForDownloadedFile

    public String getMimeTypeForDownloadedFile (long id)

Returns the media type of the given downloaded file id, if the file was downloaded successfully. Otherwise, null is returned.

Parameters
`id` | `long`: the id of the downloaded file.

Returns
`String` | the media type of the given downloaded file id, if download was successful. null otherwise.

### getRecommendedMaxBytesOverMobile

    public static Long getRecommendedMaxBytesOverMobile (Context context)

Returns recommended maximum size, in bytes, of downloads that may go over a mobile connection; or null if there's no recommended limit. The user will have the option to bypass this limit.

Parameters
`context` | `Context`: the `Context` to use for accessing the `ContentResolver`

Returns
`Long` | recommended maximum size, in bytes, of downloads that may go over a mobile connection; or null if there's no recommended limit.

### getUriForDownloadedFile

    public Uri getUriForDownloadedFile (long id)

Returns the `Uri` of the given downloaded file id, if the file is downloaded successfully. Otherwise, null is returned.

Parameters
`id` | `long`: the id of the downloaded file.

Returns
`Uri` | the `Uri` of the given downloaded file id, if download was successful. null otherwise.

### openDownloadedFile

    public ParcelFileDescriptor openDownloadedFile (long id)

Open a downloaded file for reading. The download must have completed.

Parameters
`id` | `long`: the ID of the download

Returns
`ParcelFileDescriptor` | a read-only `ParcelFileDescriptor`

Throws
`FileNotFoundException` | if the destination file does not already exist

### query

    public Cursor query (DownloadManager.Query query)

Query the download manager about downloads that have been requested.

Parameters
`query` | `DownloadManager.Query`: parameters specifying filters for this query

Returns
`Cursor` | a Cursor over the result set of downloads, with columns consisting of all the COLUMN_* constants.

### remove

    public int remove (long... ids)

Cancel downloads and remove them from the download manager. Each download will be stopped if it was running, and it will no longer be accessible through the download manager. If there is a downloaded file, partial or complete, it is deleted.

Parameters
`ids` | `long`: the IDs of the downloads to remove

Returns
`int` | the number of downloads actually removed

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