1136 lines
43 KiB
Java
1136 lines
43 KiB
Java
/*
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* Copyright (C) 2010 The Android Open Source Project
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*
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*/
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package android.app;
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import android.content.ContentResolver;
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import android.content.ContentUris;
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import android.content.ContentValues;
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import android.content.Context;
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import android.database.Cursor;
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import android.database.CursorWrapper;
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import android.net.ConnectivityManager;
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import android.net.Uri;
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import android.os.Environment;
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import android.os.ParcelFileDescriptor;
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import android.provider.BaseColumns;
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import android.provider.Downloads;
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import android.util.Pair;
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import java.io.File;
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import java.io.FileNotFoundException;
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import java.util.ArrayList;
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import java.util.Arrays;
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import java.util.HashSet;
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import java.util.List;
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import java.util.Set;
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/**
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* The download manager is a system service that handles long-running HTTP downloads. Clients may
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* request that a URI be downloaded to a particular destination file. The download manager will
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* conduct the download in the background, taking care of HTTP interactions and retrying downloads
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* after failures or across connectivity changes and system reboots.
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*
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* Instances of this class should be obtained through
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* {@link android.content.Context#getSystemService(String)} by passing
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* {@link android.content.Context#DOWNLOAD_SERVICE}.
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*
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* Apps that request downloads through this API should register a broadcast receiver for
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* {@link #ACTION_NOTIFICATION_CLICKED} to appropriately handle when the user clicks on a running
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* download in a notification or from the downloads UI.
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*/
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public class DownloadManager {
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private static final String TAG = "DownloadManager";
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/**
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* An identifier for a particular download, unique across the system. Clients use this ID to
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* make subsequent calls related to the download.
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*/
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public final static String COLUMN_ID = BaseColumns._ID;
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/**
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* The client-supplied title for this download. This will be displayed in system notifications.
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* Defaults to the empty string.
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*/
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public final static String COLUMN_TITLE = "title";
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/**
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* The client-supplied description of this download. This will be displayed in system
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* notifications. Defaults to the empty string.
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*/
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public final static String COLUMN_DESCRIPTION = "description";
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/**
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* URI to be downloaded.
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*/
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public final static String COLUMN_URI = "uri";
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/**
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* Internet Media Type of the downloaded file. If no value is provided upon creation, this will
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* initially be null and will be filled in based on the server's response once the download has
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* started.
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*
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* @see <a href="http://www.ietf.org/rfc/rfc1590.txt">RFC 1590, defining Media Types</a>
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*/
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public final static String COLUMN_MEDIA_TYPE = "media_type";
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/**
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* Total size of the download in bytes. This will initially be -1 and will be filled in once
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* the download starts.
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*/
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public final static String COLUMN_TOTAL_SIZE_BYTES = "total_size";
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/**
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* Uri where downloaded file will be stored. If a destination is supplied by client, that URI
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* will be used here. Otherwise, the value will initially be null and will be filled in with a
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* generated URI once the download has started.
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*/
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public final static String COLUMN_LOCAL_URI = "local_uri";
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/**
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* Current status of the download, as one of the STATUS_* constants.
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*/
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public final static String COLUMN_STATUS = "status";
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/**
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* Provides more detail on the status of the download. Its meaning depends on the value of
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* {@link #COLUMN_STATUS}.
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*
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* When {@link #COLUMN_STATUS} is {@link #STATUS_FAILED}, this indicates the type of error that
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* occurred. If an HTTP error occurred, this will hold the HTTP status code as defined in RFC
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* 2616. Otherwise, it will hold one of the ERROR_* constants.
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*
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* When {@link #COLUMN_STATUS} is {@link #STATUS_PAUSED}, this indicates why the download is
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* paused. It will hold one of the PAUSED_* constants.
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*
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* If {@link #COLUMN_STATUS} is neither {@link #STATUS_FAILED} nor {@link #STATUS_PAUSED}, this
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* column's value is undefined.
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*
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* @see <a href="http://www.w3.org/Protocols/rfc2616/rfc2616-sec6.html#sec6.1.1">RFC 2616
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* status codes</a>
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*/
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public final static String COLUMN_REASON = "reason";
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/**
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* Number of bytes download so far.
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*/
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public final static String COLUMN_BYTES_DOWNLOADED_SO_FAR = "bytes_so_far";
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/**
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* Timestamp when the download was last modified, in {@link System#currentTimeMillis
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* System.currentTimeMillis()} (wall clock time in UTC).
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*/
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public final static String COLUMN_LAST_MODIFIED_TIMESTAMP = "last_modified_timestamp";
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/**
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* The URI to the corresponding entry in MediaProvider for this downloaded entry. It is
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* used to delete the entries from MediaProvider database when it is deleted from the
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* downloaded list.
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*/
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public static final String COLUMN_MEDIAPROVIDER_URI = "mediaprovider_uri";
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/**
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* Value of {@link #COLUMN_STATUS} when the download is waiting to start.
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*/
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public final static int STATUS_PENDING = 1 << 0;
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/**
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* Value of {@link #COLUMN_STATUS} when the download is currently running.
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*/
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public final static int STATUS_RUNNING = 1 << 1;
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/**
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* Value of {@link #COLUMN_STATUS} when the download is waiting to retry or resume.
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*/
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public final static int STATUS_PAUSED = 1 << 2;
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/**
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* Value of {@link #COLUMN_STATUS} when the download has successfully completed.
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*/
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public final static int STATUS_SUCCESSFUL = 1 << 3;
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/**
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* Value of {@link #COLUMN_STATUS} when the download has failed (and will not be retried).
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*/
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public final static int STATUS_FAILED = 1 << 4;
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/**
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* Value of COLUMN_ERROR_CODE when the download has completed with an error that doesn't fit
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* under any other error code.
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*/
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public final static int ERROR_UNKNOWN = 1000;
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/**
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* Value of {@link #COLUMN_REASON} when a storage issue arises which doesn't fit under any
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* other error code. Use the more specific {@link #ERROR_INSUFFICIENT_SPACE} and
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* {@link #ERROR_DEVICE_NOT_FOUND} when appropriate.
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*/
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public final static int ERROR_FILE_ERROR = 1001;
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/**
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* Value of {@link #COLUMN_REASON} when an HTTP code was received that download manager
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* can't handle.
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*/
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public final static int ERROR_UNHANDLED_HTTP_CODE = 1002;
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/**
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* Value of {@link #COLUMN_REASON} when an error receiving or processing data occurred at
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* the HTTP level.
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*/
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public final static int ERROR_HTTP_DATA_ERROR = 1004;
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/**
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* Value of {@link #COLUMN_REASON} when there were too many redirects.
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*/
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public final static int ERROR_TOO_MANY_REDIRECTS = 1005;
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/**
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* Value of {@link #COLUMN_REASON} when there was insufficient storage space. Typically,
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* this is because the SD card is full.
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*/
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public final static int ERROR_INSUFFICIENT_SPACE = 1006;
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/**
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* Value of {@link #COLUMN_REASON} when no external storage device was found. Typically,
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* this is because the SD card is not mounted.
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*/
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public final static int ERROR_DEVICE_NOT_FOUND = 1007;
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/**
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* Value of {@link #COLUMN_REASON} when some possibly transient error occurred but we can't
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* resume the download.
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*/
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public final static int ERROR_CANNOT_RESUME = 1008;
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/**
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* Value of {@link #COLUMN_REASON} when the requested destination file already exists (the
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* download manager will not overwrite an existing file).
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*/
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public final static int ERROR_FILE_ALREADY_EXISTS = 1009;
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/**
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* Value of {@link #COLUMN_REASON} when the download is paused because some network error
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* occurred and the download manager is waiting before retrying the request.
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*/
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public final static int PAUSED_WAITING_TO_RETRY = 1;
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/**
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* Value of {@link #COLUMN_REASON} when the download is waiting for network connectivity to
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* proceed.
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*/
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public final static int PAUSED_WAITING_FOR_NETWORK = 2;
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/**
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* Value of {@link #COLUMN_REASON} when the download exceeds a size limit for downloads over
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* the mobile network and the download manager is waiting for a Wi-Fi connection to proceed.
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*/
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public final static int PAUSED_QUEUED_FOR_WIFI = 3;
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/**
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* Value of {@link #COLUMN_REASON} when the download is paused for some other reason.
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*/
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public final static int PAUSED_UNKNOWN = 4;
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/**
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* Broadcast intent action sent by the download manager when a download completes.
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*/
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public final static String ACTION_DOWNLOAD_COMPLETE = "android.intent.action.DOWNLOAD_COMPLETE";
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/**
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* Broadcast intent action sent by the download manager when the user clicks on a running
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* download, either from a system notification or from the downloads UI.
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*/
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public final static String ACTION_NOTIFICATION_CLICKED =
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"android.intent.action.DOWNLOAD_NOTIFICATION_CLICKED";
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/**
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* Intent action to launch an activity to display all downloads.
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*/
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public final static String ACTION_VIEW_DOWNLOADS = "android.intent.action.VIEW_DOWNLOADS";
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/**
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* Intent extra included with {@link #ACTION_DOWNLOAD_COMPLETE} intents, indicating the ID (as a
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* long) of the download that just completed.
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*/
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public static final String EXTRA_DOWNLOAD_ID = "extra_download_id";
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// this array must contain all public columns
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private static final String[] COLUMNS = new String[] {
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COLUMN_ID,
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COLUMN_MEDIAPROVIDER_URI,
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COLUMN_TITLE,
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COLUMN_DESCRIPTION,
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COLUMN_URI,
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COLUMN_MEDIA_TYPE,
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COLUMN_TOTAL_SIZE_BYTES,
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COLUMN_LOCAL_URI,
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COLUMN_STATUS,
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COLUMN_REASON,
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COLUMN_BYTES_DOWNLOADED_SO_FAR,
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COLUMN_LAST_MODIFIED_TIMESTAMP
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};
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// columns to request from DownloadProvider
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private static final String[] UNDERLYING_COLUMNS = new String[] {
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Downloads.Impl._ID,
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Downloads.Impl.COLUMN_MEDIAPROVIDER_URI,
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Downloads.COLUMN_TITLE,
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Downloads.COLUMN_DESCRIPTION,
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Downloads.COLUMN_URI,
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Downloads.COLUMN_MIME_TYPE,
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Downloads.COLUMN_TOTAL_BYTES,
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Downloads.COLUMN_STATUS,
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Downloads.COLUMN_CURRENT_BYTES,
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Downloads.COLUMN_LAST_MODIFICATION,
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Downloads.COLUMN_DESTINATION,
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Downloads.Impl.COLUMN_FILE_NAME_HINT,
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Downloads.Impl._DATA,
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};
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private static final Set<String> LONG_COLUMNS = new HashSet<String>(
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Arrays.asList(COLUMN_ID, COLUMN_TOTAL_SIZE_BYTES, COLUMN_STATUS, COLUMN_REASON,
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COLUMN_BYTES_DOWNLOADED_SO_FAR, COLUMN_LAST_MODIFIED_TIMESTAMP));
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/**
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* This class contains all the information necessary to request a new download. The URI is the
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* only required parameter.
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*
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* Note that the default download destination is a shared volume where the system might delete
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* your file if it needs to reclaim space for system use. If this is a problem, use a location
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* on external storage (see {@link #setDestinationUri(Uri)}.
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*/
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public static class Request {
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/**
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* Bit flag for {@link #setAllowedNetworkTypes} corresponding to
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* {@link ConnectivityManager#TYPE_MOBILE}.
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*/
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public static final int NETWORK_MOBILE = 1 << 0;
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/**
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* Bit flag for {@link #setAllowedNetworkTypes} corresponding to
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* {@link ConnectivityManager#TYPE_WIFI}.
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*/
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public static final int NETWORK_WIFI = 1 << 1;
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private Uri mUri;
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private Uri mDestinationUri;
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private List<Pair<String, String>> mRequestHeaders = new ArrayList<Pair<String, String>>();
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private CharSequence mTitle;
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private CharSequence mDescription;
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private boolean mShowNotification = true;
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private String mMimeType;
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private boolean mRoamingAllowed = true;
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private int mAllowedNetworkTypes = ~0; // default to all network types allowed
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private boolean mIsVisibleInDownloadsUi = true;
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/**
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* @param uri the HTTP URI to download.
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*/
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public Request(Uri uri) {
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if (uri == null) {
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throw new NullPointerException();
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}
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String scheme = uri.getScheme();
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if (scheme == null || !scheme.equals("http")) {
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throw new IllegalArgumentException("Can only download HTTP URIs: " + uri);
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}
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mUri = uri;
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}
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/**
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* Set the local destination for the downloaded file. Must be a file URI to a path on
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* external storage, and the calling application must have the WRITE_EXTERNAL_STORAGE
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* permission.
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*
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* By default, downloads are saved to a generated filename in the shared download cache and
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* may be deleted by the system at any time to reclaim space.
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*
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* @return this object
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*/
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public Request setDestinationUri(Uri uri) {
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mDestinationUri = uri;
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return this;
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}
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/**
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* Set the local destination for the downloaded file to a path within the application's
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* external files directory (as returned by {@link Context#getExternalFilesDir(String)}.
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*
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* @param context the {@link Context} to use in determining the external files directory
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* @param dirType the directory type to pass to {@link Context#getExternalFilesDir(String)}
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* @param subPath the path within the external directory, including the destination filename
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* @return this object
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*/
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public Request setDestinationInExternalFilesDir(Context context, String dirType,
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String subPath) {
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setDestinationFromBase(context.getExternalFilesDir(dirType), subPath);
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return this;
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}
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/**
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* Set the local destination for the downloaded file to a path within the public external
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* storage directory (as returned by
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* {@link Environment#getExternalStoragePublicDirectory(String)}.
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*
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* @param dirType the directory type to pass to
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* {@link Environment#getExternalStoragePublicDirectory(String)}
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* @param subPath the path within the external directory, including the destination filename
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* @return this object
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*/
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public Request setDestinationInExternalPublicDir(String dirType, String subPath) {
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setDestinationFromBase(Environment.getExternalStoragePublicDirectory(dirType), subPath);
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return this;
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}
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private void setDestinationFromBase(File base, String subPath) {
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if (subPath == null) {
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throw new NullPointerException("subPath cannot be null");
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}
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mDestinationUri = Uri.withAppendedPath(Uri.fromFile(base), subPath);
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}
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/**
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* Add an HTTP header to be included with the download request. The header will be added to
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* the end of the list.
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* @param header HTTP header name
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* @param value header value
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* @return this object
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* @see <a href="http://www.w3.org/Protocols/rfc2616/rfc2616-sec4.html#sec4.2">HTTP/1.1
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* Message Headers</a>
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*/
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public Request addRequestHeader(String header, String value) {
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if (header == null) {
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throw new NullPointerException("header cannot be null");
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}
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if (header.contains(":")) {
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throw new IllegalArgumentException("header may not contain ':'");
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}
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if (value == null) {
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value = "";
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}
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mRequestHeaders.add(Pair.create(header, value));
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return this;
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}
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/**
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* Set the title of this download, to be displayed in notifications (if enabled). If no
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* title is given, a default one will be assigned based on the download filename, once the
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* download starts.
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* @return this object
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*/
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public Request setTitle(CharSequence title) {
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mTitle = title;
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return this;
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}
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/**
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* Set a description of this download, to be displayed in notifications (if enabled)
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* @return this object
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*/
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public Request setDescription(CharSequence description) {
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mDescription = description;
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return this;
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}
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/**
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* Set the MIME content type of this download. This will override the content type declared
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* in the server's response.
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* @see <a href="http://www.w3.org/Protocols/rfc2616/rfc2616-sec3.html#sec3.7">HTTP/1.1
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* Media Types</a>
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* @return this object
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*/
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public Request setMimeType(String mimeType) {
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mMimeType = mimeType;
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return this;
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}
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/**
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* Control whether a system notification is posted by the download manager while this
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* download is running. If enabled, the download manager posts notifications about downloads
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* through the system {@link android.app.NotificationManager}. By default, a notification is
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* shown.
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*
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* If set to false, this requires the permission
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* android.permission.DOWNLOAD_WITHOUT_NOTIFICATION.
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*
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* @param show whether the download manager should show a notification for this download.
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* @return this object
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*/
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public Request setShowRunningNotification(boolean show) {
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mShowNotification = show;
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return this;
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}
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/**
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* Restrict the types of networks over which this download may proceed. By default, all
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* network types are allowed.
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* @param flags any combination of the NETWORK_* bit flags.
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* @return this object
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*/
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public Request setAllowedNetworkTypes(int flags) {
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mAllowedNetworkTypes = flags;
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return this;
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}
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/**
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* Set whether this download may proceed over a roaming connection. By default, roaming is
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* allowed.
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* @param allowed whether to allow a roaming connection to be used
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* @return this object
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*/
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public Request setAllowedOverRoaming(boolean allowed) {
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mRoamingAllowed = allowed;
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return this;
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}
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/**
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* Set whether this download should be displayed in the system's Downloads UI. True by
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* default.
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* @param isVisible whether to display this download in the Downloads UI
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* @return this object
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*/
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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;
|
|
private String mOrderByColumn = Downloads.COLUMN_LAST_MODIFICATION;
|
|
private 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'");
|
|
}
|
|
|
|
// 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);
|
|
}
|
|
|
|
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;
|
|
private 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.
|
|
*/
|
|
private 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
|
|
}
|
|
}
|
|
|
|
private 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;
|
|
}
|
|
}
|
|
}
|
|
}
|