/*
* Copyright (C) 2010 The Android Open Source Project
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
package android.app;
import android.content.ContentResolver;
import android.content.ContentUris;
import android.content.ContentValues;
import android.content.Context;
import android.database.Cursor;
import android.database.CursorWrapper;
import android.net.ConnectivityManager;
import android.net.Uri;
import android.os.Environment;
import android.os.ParcelFileDescriptor;
import android.provider.BaseColumns;
import android.provider.Downloads;
import android.util.Pair;
import java.io.File;
import java.io.FileNotFoundException;
import java.util.ArrayList;
import java.util.Arrays;
import java.util.HashSet;
import java.util.List;
import java.util.Set;
/**
* 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.
*
* Instances of this class should be obtained through
* {@link android.content.Context#getSystemService(String)} by passing
* {@link android.content.Context#DOWNLOAD_SERVICE}.
*
* Apps that request downloads through this API should register a broadcast receiver for
* {@link #ACTION_NOTIFICATION_CLICKED} to appropriately handle when the user clicks on a running
* download in a notification or from the downloads UI.
*/
public class DownloadManager {
private static final String TAG = "DownloadManager";
/**
* An identifier for a particular download, unique across the system. Clients use this ID to
* make subsequent calls related to the download.
*/
public final static String COLUMN_ID = BaseColumns._ID;
/**
* The client-supplied title for this download. This will be displayed in system notifications.
* Defaults to the empty string.
*/
public final static String COLUMN_TITLE = "title";
/**
* The client-supplied description of this download. This will be displayed in system
* notifications. Defaults to the empty string.
*/
public final static String COLUMN_DESCRIPTION = "description";
/**
* URI to be downloaded.
*/
public final static String COLUMN_URI = "uri";
/**
* 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 <a href="http://www.ietf.org/rfc/rfc1590.txt">RFC 1590, defining Media Types</a>
*/
public final static String COLUMN_MEDIA_TYPE = "media_type";
/**
* Total size of the download in bytes. This will initially be -1 and will be filled in once
* the download starts.
*/
public final static String COLUMN_TOTAL_SIZE_BYTES = "total_size";
/**
* 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.
*/
public final static String COLUMN_LOCAL_URI = "local_uri";
/**
* Current status of the download, as one of the STATUS_* constants.
*/
public final static String COLUMN_STATUS = "status";
/**
* Provides more detail on the status of the download. Its meaning depends on the value of
* {@link #COLUMN_STATUS}.
*
* When {@link #COLUMN_STATUS} is {@link #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 {@link #COLUMN_STATUS} is {@link #STATUS_PAUSED}, this indicates why the download is
* paused. It will hold one of the PAUSED_* constants.
*
* If {@link #COLUMN_STATUS} is neither {@link #STATUS_FAILED} nor {@link #STATUS_PAUSED}, this
* column's value is undefined.
*
* @see <a href="http://www.w3.org/Protocols/rfc2616/rfc2616-sec6.html#sec6.1.1">RFC 2616
* status codes</a>
*/
public final static String COLUMN_REASON = "reason";
/**
* Number of bytes download so far.
*/
public final static String COLUMN_BYTES_DOWNLOADED_SO_FAR = "bytes_so_far";
/**
* Timestamp when the download was last modified, in {@link System#currentTimeMillis
* System.currentTimeMillis()} (wall clock time in UTC).
*/
public final static String COLUMN_LAST_MODIFIED_TIMESTAMP = "last_modified_timestamp";
/**
* 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.
*/
public static final String COLUMN_MEDIAPROVIDER_URI = "mediaprovider_uri";
/**
* Value of {@link #COLUMN_STATUS} when the download is waiting to start.
*/
public final static int STATUS_PENDING = 1 << 0;
/**
* Value of {@link #COLUMN_STATUS} when the download is currently running.
*/
public final static int STATUS_RUNNING = 1 << 1;
/**
* Value of {@link #COLUMN_STATUS} when the download is waiting to retry or resume.
*/
public final static int STATUS_PAUSED = 1 << 2;
/**
* Value of {@link #COLUMN_STATUS} when the download has successfully completed.
*/
public final static int STATUS_SUCCESSFUL = 1 << 3;
/**
* Value of {@link #COLUMN_STATUS} when the download has failed (and will not be retried).
*/
public final static int STATUS_FAILED = 1 << 4;
/**
* Value of COLUMN_ERROR_CODE when the download has completed with an error that doesn't fit
* under any other error code.
*/
public final static int ERROR_UNKNOWN = 1000;
/**
* Value of {@link #COLUMN_REASON} when a storage issue arises which doesn't fit under any
* other error code. Use the more specific {@link #ERROR_INSUFFICIENT_SPACE} and
* {@link #ERROR_DEVICE_NOT_FOUND} when appropriate.
*/
public final static int ERROR_FILE_ERROR = 1001;
/**
* Value of {@link #COLUMN_REASON} when an HTTP code was received that download manager
* can't handle.
*/
public final static int ERROR_UNHANDLED_HTTP_CODE = 1002;
/**
* Value of {@link #COLUMN_REASON} when an error receiving or processing data occurred at
* the HTTP level.
*/
public final static int ERROR_HTTP_DATA_ERROR = 1004;
/**
* Value of {@link #COLUMN_REASON} when there were too many redirects.
*/
public final static int ERROR_TOO_MANY_REDIRECTS = 1005;
/**
* Value of {@link #COLUMN_REASON} when there was insufficient storage space. Typically,
* this is because the SD card is full.
*/
public final static int ERROR_INSUFFICIENT_SPACE = 1006;
/**
* Value of {@link #COLUMN_REASON} when no external storage device was found. Typically,
* this is because the SD card is not mounted.
*/
public final static int ERROR_DEVICE_NOT_FOUND = 1007;
/**
* Value of {@link #COLUMN_REASON} when some possibly transient error occurred but we can't
* resume the download.
*/
public final static int ERROR_CANNOT_RESUME = 1008;
/**
* Value of {@link #COLUMN_REASON} when the requested destination file already exists (the
* download manager will not overwrite an existing file).
*/
public final static int ERROR_FILE_ALREADY_EXISTS = 1009;
/**
* Value of {@link #COLUMN_REASON} when the download is paused because some network error
* occurred and the download manager is waiting before retrying the request.
*/
public final static int PAUSED_WAITING_TO_RETRY = 1;
/**
* Value of {@link #COLUMN_REASON} when the download is waiting for network connectivity to
* proceed.
*/
public final static int PAUSED_WAITING_FOR_NETWORK = 2;
/**
* Value of {@link #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.
*/
public final static int PAUSED_QUEUED_FOR_WIFI = 3;
/**
* Value of {@link #COLUMN_REASON} when the download is paused for some other reason.
*/
public final static int PAUSED_UNKNOWN = 4;
/**
* Broadcast intent action sent by the download manager when a download completes.
*/
public final static String ACTION_DOWNLOAD_COMPLETE = "android.intent.action.DOWNLOAD_COMPLETE";
/**
* 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.
*/
public final static String ACTION_NOTIFICATION_CLICKED =
"android.intent.action.DOWNLOAD_NOTIFICATION_CLICKED";
/**
* Intent action to launch an activity to display all downloads.
*/
public final static String ACTION_VIEW_DOWNLOADS = "android.intent.action.VIEW_DOWNLOADS";
/**
* Intent extra included with {@link #ACTION_DOWNLOAD_COMPLETE} intents, indicating the ID (as a
* long) of the download that just completed.
*/
public static final String EXTRA_DOWNLOAD_ID = "extra_download_id";
// this array must contain all public columns
private static final String[] COLUMNS = new String[] {
COLUMN_ID,
COLUMN_MEDIAPROVIDER_URI,
COLUMN_TITLE,
COLUMN_DESCRIPTION,
COLUMN_URI,
COLUMN_MEDIA_TYPE,
COLUMN_TOTAL_SIZE_BYTES,
COLUMN_LOCAL_URI,
COLUMN_STATUS,
COLUMN_REASON,
COLUMN_BYTES_DOWNLOADED_SO_FAR,
COLUMN_LAST_MODIFIED_TIMESTAMP
};
// columns to request from DownloadProvider
static final String[] UNDERLYING_COLUMNS = new String[] {
Downloads.Impl._ID,
Downloads.Impl.COLUMN_MEDIAPROVIDER_URI,
Downloads.COLUMN_TITLE,
Downloads.COLUMN_DESCRIPTION,
Downloads.COLUMN_URI,
Downloads.COLUMN_MIME_TYPE,
Downloads.COLUMN_TOTAL_BYTES,
Downloads.COLUMN_STATUS,
Downloads.COLUMN_CURRENT_BYTES,
Downloads.COLUMN_LAST_MODIFICATION,
Downloads.COLUMN_DESTINATION,
Downloads.Impl.COLUMN_FILE_NAME_HINT,
Downloads.Impl._DATA,
};
private static final Set<String> LONG_COLUMNS = new HashSet<String>(
Arrays.asList(COLUMN_ID, COLUMN_TOTAL_SIZE_BYTES, COLUMN_STATUS, COLUMN_REASON,
COLUMN_BYTES_DOWNLOADED_SO_FAR, COLUMN_LAST_MODIFIED_TIMESTAMP));
/**
* This class contains all the information necessary to request a new download. The URI is the
* only required parameter.
*
* Note that the default download destination is a shared volume where the system might delete
* your file if it needs to reclaim space for system use. If this is a problem, use a location
* on external storage (see {@link #setDestinationUri(Uri)}.
*/
public static class Request {
/**
* Bit flag for {@link #setAllowedNetworkTypes} corresponding to
* {@link ConnectivityManager#TYPE_MOBILE}.
*/
public static final int NETWORK_MOBILE = 1 << 0;
/**
* Bit flag for {@link #setAllowedNetworkTypes} corresponding to
* {@link ConnectivityManager#TYPE_WIFI}.
*/
public static final int NETWORK_WIFI = 1 << 1;
private Uri mUri;
private Uri mDestinationUri;
private List<Pair<String, String>> mRequestHeaders = new ArrayList<Pair<String, String>>();
private CharSequence mTitle;
private CharSequence mDescription;
private boolean mShowNotification = true;
private String mMimeType;
private boolean mRoamingAllowed = true;
private int mAllowedNetworkTypes = ~0; // default to all network types allowed
private boolean mIsVisibleInDownloadsUi = true;
/**
* @param uri the HTTP URI to download.
*/
public Request(Uri uri) {
if (uri == null) {
throw new NullPointerException();
}
String scheme = uri.getScheme();
if (scheme == null || !scheme.equals("http")) {
throw new IllegalArgumentException("Can only download HTTP URIs: " + uri);
}
mUri = uri;
}
/**
* Set the local destination for the downloaded file. Must be a file URI to a path on
* external storage, and the calling application must have the WRITE_EXTERNAL_STORAGE
* permission.
*
* By default, downloads are saved to a generated filename in the shared download cache and
* may be deleted by the system at any time to reclaim space.
*
* @return this object
*/
public Request setDestinationUri(Uri uri) {
mDestinationUri = uri;
return this;
}
/**
* Set the local destination for the downloaded file to a path within the application's
* external files directory (as returned by {@link Context#getExternalFilesDir(String)}.
*
* @param context the {@link Context} to use in determining the external files directory
* @param dirType the directory type to pass to {@link Context#getExternalFilesDir(String)}
* @param subPath the path within the external directory, including the destination filename
* @return this object
*/
public Request setDestinationInExternalFilesDir(Context context, String dirType,
String subPath) {
setDestinationFromBase(context.getExternalFilesDir(dirType), subPath);
return this;
}
/**
* Set the local destination for the downloaded file to a path within the public external
* storage directory (as returned by
* {@link Environment#getExternalStoragePublicDirectory(String)}.
*
* @param dirType the directory type to pass to
* {@link Environment#getExternalStoragePublicDirectory(String)}
* @param subPath the path within the external directory, including the destination filename
* @return this object
*/
public Request setDestinationInExternalPublicDir(String dirType, String subPath) {
setDestinationFromBase(Environment.getExternalStoragePublicDirectory(dirType), subPath);
return this;
}
private void setDestinationFromBase(File base, String subPath) {
if (subPath == null) {
throw new NullPointerException("subPath cannot be null");
}
mDestinationUri = Uri.withAppendedPath(Uri.fromFile(base), subPath);
}
/**
* Add an HTTP header to be included with the download request. The header will be added to
* the end of the list.
* @param header HTTP header name
* @param value header value
* @return this object
* @see <a href="http://www.w3.org/Protocols/rfc2616/rfc2616-sec4.html#sec4.2">HTTP/1.1
* Message Headers</a>
*/
public Request addRequestHeader(String header, String value) {
if (header == null) {
throw new NullPointerException("header cannot be null");
}
if (header.contains(":")) {
throw new IllegalArgumentException("header may not contain ':'");
}
if (value == null) {
value = "";
}
mRequestHeaders.add(Pair.create(header, value));
return this;
}
/**
* Set the title of this download, to be displayed in notifications (if enabled). If no
* title is given, a default one will be assigned based on the download filename, once the
* download starts.
* @return this object
*/
public Request setTitle(CharSequence title) {
mTitle = title;
return this;
}
/**
* Set a description of this download, to be displayed in notifications (if enabled)
* @return this object
*/
public Request setDescription(CharSequence description) {
mDescription = description;
return this;
}
/**
* Set the MIME content type of this download. This will override the content type declared
* in the server's response.
* @see <a href="http://www.w3.org/Protocols/rfc2616/rfc2616-sec3.html#sec3.7">HTTP/1.1
* Media Types</a>
* @return this object
*/
public Request setMimeType(String mimeType) {
mMimeType = mimeType;
return this;
}
/**
* Control whether a system notification is posted by the download manager while this
* download is running. If enabled, the download manager posts notifications about downloads
* through the system {@link android.app.NotificationManager}. By default, a notification is
* shown.
*
* If set to false, this requires the permission
* android.permission.DOWNLOAD_WITHOUT_NOTIFICATION.
*
* @param show whether the download manager should show a notification for this download.
* @return this object
*/
public Request setShowRunningNotification(boolean show) {
mShowNotification = show;
return this;
}
/**
* Restrict the types of networks over which this download may proceed. By default, all
* network types are allowed.
* @param flags any combination of the NETWORK_* bit flags.
* @return this object
*/
public Request setAllowedNetworkTypes(int flags) {
mAllowedNetworkTypes = flags;
return this;
}
/**
* Set whether this download may proceed over a roaming connection. By default, roaming is
* allowed.
* @param allowed whether to allow a roaming connection to be used
* @return this object
*/
public Request setAllowedOverRoaming(boolean allowed) {
mRoamingAllowed = allowed;
return this;
}
/**
* Set whether this download should be displayed in the system's Downloads UI. True by
* default.
* @param isVisible whether to display this download in the Downloads UI
* @return this object
*/
public Request setVisibleInDownloadsUi(boolean isVisible) {
mIsVisibleInDownloadsUi = isVisible;
return this;
}
/**
* @return ContentValues to be passed to DownloadProvider.insert()
*/
ContentValues toContentValues(String packageName) {
ContentValues values = new ContentValues();
assert mUri != null;
values.put(Downloads.COLUMN_URI, mUri.toString());
values.put(Downloads.Impl.COLUMN_IS_PUBLIC_API, true);
values.put(Downloads.COLUMN_NOTIFICATION_PACKAGE, packageName);
if (mDestinationUri != null) {
values.put(Downloads.COLUMN_DESTINATION, Downloads.Impl.DESTINATION_FILE_URI);
values.put(Downloads.COLUMN_FILE_NAME_HINT, mDestinationUri.toString());
} else {
values.put(Downloads.COLUMN_DESTINATION,
Downloads.DESTINATION_CACHE_PARTITION_PURGEABLE);
}
if (!mRequestHeaders.isEmpty()) {
encodeHttpHeaders(values);
}
putIfNonNull(values, Downloads.COLUMN_TITLE, mTitle);
putIfNonNull(values, Downloads.COLUMN_DESCRIPTION, mDescription);
putIfNonNull(values, Downloads.COLUMN_MIME_TYPE, mMimeType);
values.put(Downloads.COLUMN_VISIBILITY,
mShowNotification ? Downloads.VISIBILITY_VISIBLE
: Downloads.VISIBILITY_HIDDEN);
values.put(Downloads.Impl.COLUMN_ALLOWED_NETWORK_TYPES, mAllowedNetworkTypes);
values.put(Downloads.Impl.COLUMN_ALLOW_ROAMING, mRoamingAllowed);
values.put(Downloads.Impl.COLUMN_IS_VISIBLE_IN_DOWNLOADS_UI, mIsVisibleInDownloadsUi);
return values;
}
private void encodeHttpHeaders(ContentValues values) {
int index = 0;
for (Pair<String, String> header : mRequestHeaders) {
String headerString = header.first + ": " + header.second;
values.put(Downloads.Impl.RequestHeaders.INSERT_KEY_PREFIX + index, headerString);
index++;
}
}
private void putIfNonNull(ContentValues contentValues, String key, Object value) {
if (value != null) {
contentValues.put(key, value.toString());
}
}
}
/**
* This class may be used to filter download manager queries.
*/
public static class Query {
/**
* Constant for use with {@link #orderBy}
* @hide
*/
public static final int ORDER_ASCENDING = 1;
/**
* Constant for use with {@link #orderBy}
* @hide
*/
public static final int ORDER_DESCENDING = 2;
private long[] mIds = null;
private Integer mStatusFlags = null;
String mOrderByColumn = Downloads.COLUMN_LAST_MODIFICATION;
int mOrderDirection = ORDER_DESCENDING;
private boolean mOnlyIncludeVisibleInDownloadsUi = false;
/**
* Include only the downloads with the given IDs.
* @return this object
*/
public Query setFilterById(long... ids) {
mIds = ids;
return this;
}
/**
* Include only downloads with status matching any the given status flags.
* @param flags any combination of the STATUS_* bit flags
* @return this object
*/
public Query setFilterByStatus(int flags) {
mStatusFlags = flags;
return this;
}
/**
* Controls whether this query includes downloads not visible in the system's Downloads UI.
* @param value if true, this query will only include downloads that should be displayed in
* the system's Downloads UI; if false (the default), this query will include
* both visible and invisible downloads.
* @return this object
* @hide
*/
public Query setOnlyIncludeVisibleInDownloadsUi(boolean value) {
mOnlyIncludeVisibleInDownloadsUi = value;
return this;
}
/**
* Change the sort order of the returned Cursor.
*
* @param column one of the COLUMN_* constants; currently, only
* {@link #COLUMN_LAST_MODIFIED_TIMESTAMP} and {@link #COLUMN_TOTAL_SIZE_BYTES} are
* supported.
* @param direction either {@link #ORDER_ASCENDING} or {@link #ORDER_DESCENDING}
* @return this object
* @hide
*/
public Query orderBy(String column, int direction) {
if (direction != ORDER_ASCENDING && direction != ORDER_DESCENDING) {
throw new IllegalArgumentException("Invalid direction: " + direction);
}
if (column.equals(COLUMN_LAST_MODIFIED_TIMESTAMP)) {
mOrderByColumn = Downloads.COLUMN_LAST_MODIFICATION;
} else if (column.equals(COLUMN_TOTAL_SIZE_BYTES)) {
mOrderByColumn = Downloads.COLUMN_TOTAL_BYTES;
} else {
throw new IllegalArgumentException("Cannot order by " + column);
}
mOrderDirection = direction;
return this;
}
/**
* Run this query using the given ContentResolver.
* @param projection the projection to pass to ContentResolver.query()
* @return the Cursor returned by ContentResolver.query()
*/
Cursor runQuery(ContentResolver resolver, String[] projection, Uri baseUri) {
Uri uri = baseUri;
List<String> selectionParts = new ArrayList<String>();
String[] selectionArgs = null;
if (mIds != null) {
selectionParts.add(getWhereClauseForIds(mIds));
selectionArgs = getWhereArgsForIds(mIds);
}
if (mStatusFlags != null) {
List<String> parts = new ArrayList<String>();
if ((mStatusFlags & STATUS_PENDING) != 0) {
parts.add(statusClause("=", Downloads.STATUS_PENDING));
}
if ((mStatusFlags & STATUS_RUNNING) != 0) {
parts.add(statusClause("=", Downloads.STATUS_RUNNING));
}
if ((mStatusFlags & STATUS_PAUSED) != 0) {
parts.add(statusClause("=", Downloads.Impl.STATUS_PAUSED_BY_APP));
parts.add(statusClause("=", Downloads.Impl.STATUS_WAITING_TO_RETRY));
parts.add(statusClause("=", Downloads.Impl.STATUS_WAITING_FOR_NETWORK));
parts.add(statusClause("=", Downloads.Impl.STATUS_QUEUED_FOR_WIFI));
}
if ((mStatusFlags & STATUS_SUCCESSFUL) != 0) {
parts.add(statusClause("=", Downloads.STATUS_SUCCESS));
}
if ((mStatusFlags & STATUS_FAILED) != 0) {
parts.add("(" + statusClause(">=", 400)
+ " AND " + statusClause("<", 600) + ")");
}
selectionParts.add("(" + joinStrings(" OR ", parts) + ")");
}
if (mOnlyIncludeVisibleInDownloadsUi) {
selectionParts.add(Downloads.Impl.COLUMN_IS_VISIBLE_IN_DOWNLOADS_UI + " != '0'");
}
addExtraSelectionParts(selectionParts);
// only return rows which are not marked 'deleted = 1'
selectionParts.add(Downloads.Impl.COLUMN_DELETED + " != '1'");
String selection = joinStrings(" AND ", selectionParts);
String orderDirection = (mOrderDirection == ORDER_ASCENDING ? "ASC" : "DESC");
String orderBy = mOrderByColumn + " " + orderDirection;
return resolver.query(uri, projection, selection, selectionArgs, orderBy);
}
/**
* Add extra selection parts for query.
*/
void addExtraSelectionParts(List<String> selectionParts) {
}
private String joinStrings(String joiner, Iterable<String> parts) {
StringBuilder builder = new StringBuilder();
boolean first = true;
for (String part : parts) {
if (!first) {
builder.append(joiner);
}
builder.append(part);
first = false;
}
return builder.toString();
}
private String statusClause(String operator, int value) {
return Downloads.COLUMN_STATUS + operator + "'" + value + "'";
}
}
private ContentResolver mResolver;
private String mPackageName;
Uri mBaseUri = Downloads.Impl.CONTENT_URI;
/**
* @hide
*/
public DownloadManager(ContentResolver resolver, String packageName) {
mResolver = resolver;
mPackageName = packageName;
}
/**
* Makes this object access the download provider through /all_downloads URIs rather than
* /my_downloads URIs, for clients that have permission to do so.
* @hide
*/
public void setAccessAllDownloads(boolean accessAllDownloads) {
if (accessAllDownloads) {
mBaseUri = Downloads.Impl.ALL_DOWNLOADS_CONTENT_URI;
} else {
mBaseUri = Downloads.Impl.CONTENT_URI;
}
}
/**
* Enqueue a new download. The download will start automatically once the download manager is
* ready to execute it and connectivity is available.
*
* @param request the parameters specifying this download
* @return an ID for the download, unique across the system. This ID is used to make future
* calls related to this download.
*/
public long enqueue(Request request) {
ContentValues values = request.toContentValues(mPackageName);
Uri downloadUri = mResolver.insert(Downloads.CONTENT_URI, values);
long id = Long.parseLong(downloadUri.getLastPathSegment());
return id;
}
/**
* Marks the specified download as 'to be deleted'. This is done when a completed download
* is to be removed but the row was stored without enough info to delete the corresponding
* metadata from Mediaprovider database. Actual cleanup of this row is done in DownloadService.
*
* @param ids the IDs of the downloads to be marked 'deleted'
* @return the number of downloads actually updated
* @hide
*/
public int markRowDeleted(long... ids) {
if (ids == null || ids.length == 0) {
// called with nothing to remove!
throw new IllegalArgumentException("input param 'ids' can't be null");
}
ContentValues values = new ContentValues();
values.put(Downloads.Impl.COLUMN_DELETED, 1);
return mResolver.update(mBaseUri, values, getWhereClauseForIds(ids),
getWhereArgsForIds(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 a file
* was already downloaded to external storage, it will not be deleted.
*
* @param ids the IDs of the downloads to remove
* @return the number of downloads actually removed
*/
public int remove(long... ids) {
if (ids == null || ids.length == 0) {
// called with nothing to remove!
throw new IllegalArgumentException("input param 'ids' can't be null");
}
return mResolver.delete(mBaseUri, getWhereClauseForIds(ids), getWhereArgsForIds(ids));
}
/**
* Query the download manager about downloads that have been requested.
* @param query parameters specifying filters for this query
* @return a Cursor over the result set of downloads, with columns consisting of all the
* COLUMN_* constants.
*/
public Cursor query(Query query) {
Cursor underlyingCursor = query.runQuery(mResolver, UNDERLYING_COLUMNS, mBaseUri);
if (underlyingCursor == null) {
return null;
}
return new CursorTranslator(underlyingCursor, mBaseUri);
}
/**
* Open a downloaded file for reading. The download must have completed.
* @param id the ID of the download
* @return a read-only {@link ParcelFileDescriptor}
* @throws FileNotFoundException if the destination file does not already exist
*/
public ParcelFileDescriptor openDownloadedFile(long id) throws FileNotFoundException {
return mResolver.openFileDescriptor(getDownloadUri(id), "r");
}
/**
* Restart the given downloads, which must have already completed (successfully or not). This
* method will only work when called from within the download manager's process.
* @param ids the IDs of the downloads
* @hide
*/
public void restartDownload(long... ids) {
Cursor cursor = query(new Query().setFilterById(ids));
try {
for (cursor.moveToFirst(); !cursor.isAfterLast(); cursor.moveToNext()) {
int status = cursor.getInt(cursor.getColumnIndex(COLUMN_STATUS));
if (status != STATUS_SUCCESSFUL && status != STATUS_FAILED) {
throw new IllegalArgumentException("Cannot restart incomplete download: "
+ cursor.getLong(cursor.getColumnIndex(COLUMN_ID)));
}
}
} finally {
cursor.close();
}
ContentValues values = new ContentValues();
values.put(Downloads.Impl.COLUMN_CURRENT_BYTES, 0);
values.put(Downloads.Impl.COLUMN_TOTAL_BYTES, -1);
values.putNull(Downloads.Impl._DATA);
values.put(Downloads.Impl.COLUMN_STATUS, Downloads.Impl.STATUS_PENDING);
mResolver.update(mBaseUri, values, getWhereClauseForIds(ids), getWhereArgsForIds(ids));
}
/**
* Get the DownloadProvider URI for the download with the given ID.
*/
Uri getDownloadUri(long id) {
return ContentUris.withAppendedId(mBaseUri, id);
}
/**
* Get a parameterized SQL WHERE clause to select a bunch of IDs.
*/
static String getWhereClauseForIds(long[] ids) {
StringBuilder whereClause = new StringBuilder();
whereClause.append("(");
for (int i = 0; i < ids.length; i++) {
if (i > 0) {
whereClause.append("OR ");
}
whereClause.append(Downloads.Impl._ID);
whereClause.append(" = ? ");
}
whereClause.append(")");
return whereClause.toString();
}
/**
* Get the selection args for a clause returned by {@link #getWhereClauseForIds(long[])}.
*/
static String[] getWhereArgsForIds(long[] ids) {
String[] whereArgs = new String[ids.length];
for (int i = 0; i < ids.length; i++) {
whereArgs[i] = Long.toString(ids[i]);
}
return whereArgs;
}
/**
* This class wraps a cursor returned by DownloadProvider -- the "underlying cursor" -- and
* presents a different set of columns, those defined in the DownloadManager.COLUMN_* constants.
* Some columns correspond directly to underlying values while others are computed from
* underlying data.
*/
static class CursorTranslator extends CursorWrapper {
private Uri mBaseUri;
public CursorTranslator(Cursor cursor, Uri baseUri) {
super(cursor);
mBaseUri = baseUri;
}
@Override
public int getColumnIndex(String columnName) {
return Arrays.asList(COLUMNS).indexOf(columnName);
}
@Override
public int getColumnIndexOrThrow(String columnName) throws IllegalArgumentException {
int index = getColumnIndex(columnName);
if (index == -1) {
throw new IllegalArgumentException("No such column: " + columnName);
}
return index;
}
@Override
public String getColumnName(int columnIndex) {
int numColumns = COLUMNS.length;
if (columnIndex < 0 || columnIndex >= numColumns) {
throw new IllegalArgumentException("Invalid column index " + columnIndex + ", "
+ numColumns + " columns exist");
}
return COLUMNS[columnIndex];
}
@Override
public String[] getColumnNames() {
String[] returnColumns = new String[COLUMNS.length];
System.arraycopy(COLUMNS, 0, returnColumns, 0, COLUMNS.length);
return returnColumns;
}
@Override
public int getColumnCount() {
return COLUMNS.length;
}
@Override
public byte[] getBlob(int columnIndex) {
throw new UnsupportedOperationException();
}
@Override
public double getDouble(int columnIndex) {
return getLong(columnIndex);
}
private boolean isLongColumn(String column) {
return LONG_COLUMNS.contains(column);
}
@Override
public float getFloat(int columnIndex) {
return (float) getDouble(columnIndex);
}
@Override
public int getInt(int columnIndex) {
return (int) getLong(columnIndex);
}
@Override
public long getLong(int columnIndex) {
return translateLong(getColumnName(columnIndex));
}
@Override
public short getShort(int columnIndex) {
return (short) getLong(columnIndex);
}
@Override
public String getString(int columnIndex) {
return translateString(getColumnName(columnIndex));
}
private String translateString(String column) {
if (isLongColumn(column)) {
return Long.toString(translateLong(column));
}
if (column.equals(COLUMN_TITLE)) {
return getUnderlyingString(Downloads.COLUMN_TITLE);
}
if (column.equals(COLUMN_DESCRIPTION)) {
return getUnderlyingString(Downloads.COLUMN_DESCRIPTION);
}
if (column.equals(COLUMN_URI)) {
return getUnderlyingString(Downloads.COLUMN_URI);
}
if (column.equals(COLUMN_MEDIA_TYPE)) {
return getUnderlyingString(Downloads.COLUMN_MIME_TYPE);
}
if (column.equals(COLUMN_MEDIAPROVIDER_URI)) {
return getUnderlyingString(Downloads.Impl.COLUMN_MEDIAPROVIDER_URI);
}
assert column.equals(COLUMN_LOCAL_URI);
return getLocalUri();
}
private String getLocalUri() {
long destinationType = getUnderlyingLong(Downloads.Impl.COLUMN_DESTINATION);
if (destinationType == Downloads.Impl.DESTINATION_FILE_URI) {
// return client-provided file URI for external download
return getUnderlyingString(Downloads.Impl.COLUMN_FILE_NAME_HINT);
}
if (destinationType == Downloads.Impl.DESTINATION_EXTERNAL) {
// return stored destination for legacy external download
String localPath = getUnderlyingString(Downloads.Impl._DATA);
if (localPath == null) {
return null;
}
return Uri.fromFile(new File(localPath)).toString();
}
// return content URI for cache download
long downloadId = getUnderlyingLong(Downloads.Impl._ID);
return ContentUris.withAppendedId(mBaseUri, downloadId).toString();
}
private long translateLong(String column) {
if (!isLongColumn(column)) {
// mimic behavior of underlying cursor -- most likely, throw NumberFormatException
return Long.valueOf(translateString(column));
}
if (column.equals(COLUMN_ID)) {
return getUnderlyingLong(Downloads.Impl._ID);
}
if (column.equals(COLUMN_TOTAL_SIZE_BYTES)) {
return getUnderlyingLong(Downloads.COLUMN_TOTAL_BYTES);
}
if (column.equals(COLUMN_STATUS)) {
return translateStatus((int) getUnderlyingLong(Downloads.COLUMN_STATUS));
}
if (column.equals(COLUMN_REASON)) {
return getReason((int) getUnderlyingLong(Downloads.COLUMN_STATUS));
}
if (column.equals(COLUMN_BYTES_DOWNLOADED_SO_FAR)) {
return getUnderlyingLong(Downloads.COLUMN_CURRENT_BYTES);
}
assert column.equals(COLUMN_LAST_MODIFIED_TIMESTAMP);
return getUnderlyingLong(Downloads.COLUMN_LAST_MODIFICATION);
}
private long getReason(int status) {
switch (translateStatus(status)) {
case STATUS_FAILED:
return getErrorCode(status);
case STATUS_PAUSED:
return getPausedReason(status);
default:
return 0; // arbitrary value when status is not an error
}
}
long getPausedReason(int status) {
switch (status) {
case Downloads.Impl.STATUS_WAITING_TO_RETRY:
return PAUSED_WAITING_TO_RETRY;
case Downloads.Impl.STATUS_WAITING_FOR_NETWORK:
return PAUSED_WAITING_FOR_NETWORK;
case Downloads.Impl.STATUS_QUEUED_FOR_WIFI:
return PAUSED_QUEUED_FOR_WIFI;
default:
return PAUSED_UNKNOWN;
}
}
private long getErrorCode(int status) {
if ((400 <= status && status < Downloads.Impl.MIN_ARTIFICIAL_ERROR_STATUS)
|| (500 <= status && status < 600)) {
// HTTP status code
return status;
}
switch (status) {
case Downloads.STATUS_FILE_ERROR:
return ERROR_FILE_ERROR;
case Downloads.STATUS_UNHANDLED_HTTP_CODE:
case Downloads.STATUS_UNHANDLED_REDIRECT:
return ERROR_UNHANDLED_HTTP_CODE;
case Downloads.STATUS_HTTP_DATA_ERROR:
return ERROR_HTTP_DATA_ERROR;
case Downloads.STATUS_TOO_MANY_REDIRECTS:
return ERROR_TOO_MANY_REDIRECTS;
case Downloads.STATUS_INSUFFICIENT_SPACE_ERROR:
return ERROR_INSUFFICIENT_SPACE;
case Downloads.STATUS_DEVICE_NOT_FOUND_ERROR:
return ERROR_DEVICE_NOT_FOUND;
case Downloads.Impl.STATUS_CANNOT_RESUME:
return ERROR_CANNOT_RESUME;
case Downloads.Impl.STATUS_FILE_ALREADY_EXISTS_ERROR:
return ERROR_FILE_ALREADY_EXISTS;
default:
return ERROR_UNKNOWN;
}
}
private long getUnderlyingLong(String column) {
return super.getLong(super.getColumnIndex(column));
}
private String getUnderlyingString(String column) {
return super.getString(super.getColumnIndex(column));
}
private int translateStatus(int status) {
switch (status) {
case Downloads.STATUS_PENDING:
return STATUS_PENDING;
case Downloads.STATUS_RUNNING:
return STATUS_RUNNING;
case Downloads.Impl.STATUS_PAUSED_BY_APP:
case Downloads.Impl.STATUS_WAITING_TO_RETRY:
case Downloads.Impl.STATUS_WAITING_FOR_NETWORK:
case Downloads.Impl.STATUS_QUEUED_FOR_WIFI:
return STATUS_PAUSED;
case Downloads.STATUS_SUCCESS:
return STATUS_SUCCESSFUL;
default:
assert Downloads.isStatusError(status);
return STATUS_FAILED;
}
}
}
}