एक ही समय में एकाधिक फ़ाइलों को डाउनलोड करने के लिए एंड्रॉइड डाउनलोड प्रबंधक का अनुरोध कैसे करें। इसके अलावा मैं प्रत्येक फ़ाइल डाउनलोड स्थिति को जानना चाहता हूं।Android में डाउनलोड प्रबंधक का उपयोग करके एकाधिक डाउनलोड का अनुरोध कैसे करें 2.3.3
पहले अनुरोध करें।
फिर, दूसरे से अनुरोध करें।
फिर, तीसरे से अनुरोध करें।
आवश्यकतानुसार जारी रखें।
चाहे वे "एक ही समय में" डाउनलोड करें, आपकी चिंता नहीं है, न ही आप इसका नियंत्रण रखते हैं। वे डाउनलोड करेंगे जब DownloadManager उन्हें डाउनलोड करने का निर्णय लेता है, जो एक साथ हो सकता है या नहीं।
1. Register listener for download complete
IntentFilter intentFilter = new IntentFilter(
DownloadManager.ACTION_DOWNLOAD_COMPLETE);
registerReceiver(downloadReceiver, intentFilter);
2.Make request
Uri downloadUri = Uri.parse(entry.getValue());
DownloadManager.Request request = new DownloadManager.Request(
downloadUri);
request.setDestinationUri(path_to _file_store)));
downloadManager.enqueue(request);
3.Check status in listener
private BroadcastReceiver downloadReceiver = new BroadcastReceiver() {
@Override
public void onReceive(Context arg0, Intent intent) {
String action = intent.getAction();
if (DownloadManager.ACTION_DOWNLOAD_COMPLETE.equals(action)) {
long downloadId = intent.getLongExtra(
DownloadManager.EXTRA_DOWNLOAD_ID, 0);
System.out.println("download id=" + downloadId);
CheckDwnloadStatus(downloadId);
}
}
};
private void CheckDwnloadStatus(long id) {
// TODO Auto-generated method stub
DownloadManager.Query query = new DownloadManager.Query();
query.setFilterById(id);
Cursor cursor = downloadManager.query(query);
if (cursor.moveToFirst()) {
int columnIndex = cursor
.getColumnIndex(DownloadManager.COLUMN_STATUS);
int status = cursor.getInt(columnIndex);
int columnReason = cursor
.getColumnIndex(DownloadManager.COLUMN_REASON);
int reason = cursor.getInt(columnReason);
switch (status) {
case DownloadManager.STATUS_FAILED:
String failedReason = "";
switch (reason) {
case DownloadManager.ERROR_CANNOT_RESUME:
failedReason = "ERROR_CANNOT_RESUME";
break;
case DownloadManager.ERROR_DEVICE_NOT_FOUND:
failedReason = "ERROR_DEVICE_NOT_FOUND";
break;
case DownloadManager.ERROR_FILE_ALREADY_EXISTS:
failedReason = "ERROR_FILE_ALREADY_EXISTS";
break;
case DownloadManager.ERROR_FILE_ERROR:
failedReason = "ERROR_FILE_ERROR";
break;
case DownloadManager.ERROR_HTTP_DATA_ERROR:
failedReason = "ERROR_HTTP_DATA_ERROR";
break;
case DownloadManager.ERROR_INSUFFICIENT_SPACE:
failedReason = "ERROR_INSUFFICIENT_SPACE";
break;
case DownloadManager.ERROR_TOO_MANY_REDIRECTS:
failedReason = "ERROR_TOO_MANY_REDIRECTS";
break;
case DownloadManager.ERROR_UNHANDLED_HTTP_CODE:
failedReason = "ERROR_UNHANDLED_HTTP_CODE";
break;
case DownloadManager.ERROR_UNKNOWN:
failedReason = "ERROR_UNKNOWN";
break;
}
Toast.makeText(this, "FAILED: " + failedReason,
Toast.LENGTH_LONG).show();
break;
case DownloadManager.STATUS_PAUSED:
String pausedReason = "";
switch (reason) {
case DownloadManager.PAUSED_QUEUED_FOR_WIFI:
pausedReason = "PAUSED_QUEUED_FOR_WIFI";
break;
case DownloadManager.PAUSED_UNKNOWN:
pausedReason = "PAUSED_UNKNOWN";
break;
case DownloadManager.PAUSED_WAITING_FOR_NETWORK:
pausedReason = "PAUSED_WAITING_FOR_NETWORK";
break;
case DownloadManager.PAUSED_WAITING_TO_RETRY:
pausedReason = "PAUSED_WAITING_TO_RETRY";
break;
}
Toast.makeText(this, "PAUSED: " + pausedReason,
Toast.LENGTH_LONG).show();
break;
case DownloadManager.STATUS_PENDING:
Toast.makeText(this, "PENDING", Toast.LENGTH_LONG).show();
break;
case DownloadManager.STATUS_RUNNING:
Toast.makeText(this, "RUNNING", Toast.LENGTH_LONG).show();
break;
case DownloadManager.STATUS_SUCCESSFUL:
caluclateLoadingData();
// Toast.makeText(this, "SUCCESSFUL", Toast.LENGTH_LONG).show();
// GetFile();
break;
}
}
}
सार्वजनिक वर्ग DownloadManager { निजी स्थिर अंतिम स्ट्रिंग टैग = "DownloadManager";
public final static String COLUMN_ID = BaseColumns._ID;
public final static String COLUMN_TITLE = "title";
public final static String COLUMN_DESCRIPTION = "description";
public final static String COLUMN_URI = "uri";
public final static String COLUMN_MEDIA_TYPE = "media_type";
public final static String COLUMN_TOTAL_SIZE_BYTES = "total_size";
public final static String COLUMN_LOCAL_URI = "local_uri";
public final static String COLUMN_STATUS = "status";
public final static String COLUMN_REASON = "reason";
public final static String COLUMN_BYTES_DOWNLOADED_SO_FAR = "bytes_so_far";
public final static String COLUMN_LAST_MODIFIED_TIMESTAMP = "last_modified_timestamp";
public static final String COLUMN_MEDIAPROVIDER_URI = "mediaprovider_uri";
public final static int STATUS_PENDING = 1 << 0;
public final static int STATUS_RUNNING = 1 << 1;
public final static int STATUS_PAUSED = 1 << 2;
public final static int STATUS_SUCCESSFUL = 1 << 3;
public final static int STATUS_FAILED = 1 << 4;
public final static int ERROR_UNKNOWN = 1000;
public final static int ERROR_FILE_ERROR = 1001;
public final static int ERROR_UNHANDLED_HTTP_CODE = 1002;
public final static int ERROR_HTTP_DATA_ERROR = 1004;
public final static int ERROR_TOO_MANY_REDIRECTS = 1005;
public final static int ERROR_INSUFFICIENT_SPACE = 1006;
public final static int ERROR_DEVICE_NOT_FOUND = 1007;
public final static int ERROR_CANNOT_RESUME = 1008;
public final static int ERROR_FILE_ALREADY_EXISTS = 1009;
public final static int PAUSED_WAITING_TO_RETRY = 1;
public final static int PAUSED_WAITING_FOR_NETWORK = 2;
public final static int PAUSED_QUEUED_FOR_WIFI = 3;
public final static int PAUSED_UNKNOWN = 4;
public final static String ACTION_DOWNLOAD_COMPLETE = "android.intent.action.DOWNLOAD_COMPLETE";
public final static String ACTION_NOTIFICATION_CLICKED = "android.intent.action.DOWNLOAD_NOTIFICATION_CLICKED";
public final static String ACTION_VIEW_DOWNLOADS = "android.intent.action.VIEW_DOWNLOADS";
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
private 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));
public static class Request {
public static final int NETWORK_MOBILE = 1 << 0;
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") || scheme.equals("https"))) {
throw new IllegalArgumentException(
"Can only download HTTP URIs: " + uri);
}
mUri = uri;
}
public Request setDestinationUri(Uri uri) {
mDestinationUri = uri;
return this;
}
public Request setDestinationInExternalFilesDir(Context context,
String dirType, String subPath) {
setDestinationFromBase(context.getExternalFilesDir(dirType),
subPath);
return this;
}
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);
}
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;
}
public Request setTitle(CharSequence title) {
mTitle = title;
return this;
}
public Request setDescription(CharSequence description) {
mDescription = description;
return this;
}
public Request setMimeType(String mimeType) {
mMimeType = mimeType;
return this;
}
public Request setShowRunningNotification(boolean show) {
mShowNotification = show;
return this;
}
public Request setAllowedNetworkTypes(int flags) {
mAllowedNetworkTypes = flags;
return this;
}
public Request setAllowedOverRoaming(boolean allowed) {
mRoamingAllowed = allowed;
return this;
}
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;
}
}
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;
}
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));
}
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));
}
public Cursor query(Query query) {
Cursor underlyingCursor = query.runQuery(mResolver, UNDERLYING_COLUMNS,
mBaseUri);
if (underlyingCursor == null) {
return null;
}
return new CursorTranslator(underlyingCursor, mBaseUri);
}
public ParcelFileDescriptor openDownloadedFile(long id)
throws FileNotFoundException {
return mResolver.openFileDescriptor(getDownloadUri(id), "r");
}
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;
}
}
}
}
public final class Downloads {
/**
* @hide
*/
private Downloads() {}
/**
* The permission to access the download manager
* @hide .
*/
public static final String PERMISSION_ACCESS = "android.permission.ACCESS_DOWNLOAD_MANAGER";
/**
* The permission to access the download manager's advanced functions
* @hide
*/
public static final String PERMISSION_ACCESS_ADVANCED =
"android.permission.ACCESS_DOWNLOAD_MANAGER_ADVANCED";
/**
* The permission to directly access the download manager's cache directory
* @hide
*/
public static final String PERMISSION_CACHE = "android.permission.ACCESS_CACHE_FILESYSTEM";
/**
* The permission to send broadcasts on download completion
* @hide
*/
public static final String PERMISSION_SEND_INTENTS =
"android.permission.SEND_DOWNLOAD_COMPLETED_INTENTS";
/**
* The content:// URI for the data table in the provider
* @hide
*/
public static final Uri CONTENT_URI =
Uri.parse("content://downloads/my_downloads");
/**
* Broadcast Action: this is sent by the download manager to the app
* that had initiated a download when that download completes. The
* download's content: uri is specified in the intent's data.
* @hide
*/
public static final String ACTION_DOWNLOAD_COMPLETED =
"android.intent.action.DOWNLOAD_COMPLETED";
/**
* Broadcast Action: this is sent by the download manager to the app
* that had initiated a download when the user selects the notification
* associated with that download. The download's content: uri is specified
* in the intent's data if the click is associated with a single download,
* or Downloads.CONTENT_URI if the notification is associated with
* multiple downloads.
* Note: this is not currently sent for downloads that have completed
* successfully.
* @hide
*/
public static final String ACTION_NOTIFICATION_CLICKED =
"android.intent.action.DOWNLOAD_NOTIFICATION_CLICKED";
/**
* The name of the column containing the URI of the data being downloaded.
* <P>Type: TEXT</P>
* <P>Owner can Init/Read</P>
* @hide
*/
public static final String COLUMN_URI = "uri";
public static final String COLUMN_APP_DATA = "entity";
public static final String COLUMN_NO_INTEGRITY = "no_integrity";
public static final String COLUMN_FILE_NAME_HINT = "hint";
public static final String _DATA = "_data";
public static final String COLUMN_MIME_TYPE = "mimetype";
public static final String COLUMN_DESTINATION = "destination";
public static final String COLUMN_VISIBILITY = "visibility";
public static final String COLUMN_CONTROL = "control";
public static final String COLUMN_STATUS = "status";
/**
* The name of the column containing the date at which some interesting
* status changed in the download. Stored as a System.currentTimeMillis()
* value.
* <P>Type: BIGINT</P>
* <P>Owner can Read</P>
* @hide
*/
public static final String COLUMN_LAST_MODIFICATION = "lastmod";
/**
* The name of the column containing the package name of the application
* that initiating the download. The download manager will send
* notifications to a component in this package when the download completes.
* <P>Type: TEXT</P>
* <P>Owner can Init/Read</P>
* @hide
*/
public static final String COLUMN_NOTIFICATION_PACKAGE = "notificationpackage";
public static final String COLUMN_NOTIFICATION_CLASS = "notificationclass";
public static final String COLUMN_NOTIFICATION_EXTRAS = "notificationextras";
public static final String COLUMN_COOKIE_DATA = "cookiedata";
public static final String COLUMN_USER_AGENT = "useragent";
public static final String COLUMN_REFERER = "referer";
public static final String COLUMN_TOTAL_BYTES = "total_bytes";
public static final String COLUMN_CURRENT_BYTES = "current_bytes";
public static final String COLUMN_OTHER_UID = "otheruid";
public static final String COLUMN_TITLE = "title";
public static final String COLUMN_DESCRIPTION = "description";
public static final String COLUMN_DELETED = "deleted";
public static final int DESTINATION_EXTERNAL = 0;
public static final int DESTINATION_CACHE_PARTITION = 1;
public static final int DESTINATION_CACHE_PARTITION_PURGEABLE = 2;
public static final int DESTINATION_CACHE_PARTITION_NOROAMING = 3;
public static final int CONTROL_RUN = 0;
public static final int CONTROL_PAUSED = 1;
/**
* Returns whether the status is informational (i.e. 1xx).
* @hide
*/
public static boolean isStatusInformational(int status) {
return (status >= 100 && status < 200);
}
public static boolean isStatusSuccess(int status) {
return (status >= 200 && status < 300);
}
public static boolean isStatusError(int status) {
return (status >= 400 && status < 600);
}
public static boolean isStatusClientError(int status) {
return (status >= 400 && status < 500);
}
public static boolean isStatusServerError(int status) {
return (status >= 500 && status < 600);
}
public static boolean isStatusCompleted(int status) {
return (status >= 200 && status < 300) || (status >= 400 && status < 600);
}
public static final int STATUS_PENDING = 190;
public static final int STATUS_RUNNING = 192;
public static final int STATUS_SUCCESS = 200;
public static final int STATUS_BAD_REQUEST = 400;
public static final int STATUS_NOT_ACCEPTABLE = 406;
public static final int STATUS_LENGTH_REQUIRED = 411;
public static final int STATUS_PRECONDITION_FAILED = 412;
public static final int STATUS_CANCELED = 490;
public static final int STATUS_UNKNOWN_ERROR = 491;
public static final int STATUS_FILE_ERROR = 492;
public static final int STATUS_UNHANDLED_REDIRECT = 493;
public static final int STATUS_UNHANDLED_HTTP_CODE = 494;
public static final int STATUS_HTTP_DATA_ERROR = 495;
public static final int STATUS_HTTP_EXCEPTION = 496;
public static final int STATUS_TOO_MANY_REDIRECTS = 497;
public static final int STATUS_INSUFFICIENT_SPACE_ERROR = 498;
public static final int STATUS_DEVICE_NOT_FOUND_ERROR = 499;
public static final int VISIBILITY_VISIBLE = 0;
public static final int VISIBILITY_VISIBLE_NOTIFY_COMPLETED = 1;
public static final int VISIBILITY_HIDDEN = 2;
public static final class Impl implements BaseColumns {
private Impl() {}
/**
* The permission to access the download manager
*/
public static final String PERMISSION_ACCESS = "android.permission.ACCESS_DOWNLOAD_MANAGER";
/**
* The permission to access the download manager's advanced functions
*/
public static final String PERMISSION_ACCESS_ADVANCED =
"android.permission.ACCESS_DOWNLOAD_MANAGER_ADVANCED";
/**
* The permission to access the all the downloads in the manager.
*/
public static final String PERMISSION_ACCESS_ALL =
"android.permission.ACCESS_ALL_DOWNLOADS";
/**
* The permission to directly access the download manager's cache
* directory
*/
public static final String PERMISSION_CACHE = "android.permission.ACCESS_CACHE_FILESYSTEM";
/**
* The permission to send broadcasts on download completion
*/
public static final String PERMISSION_SEND_INTENTS =
"android.permission.SEND_DOWNLOAD_COMPLETED_INTENTS";
/**
* The permission to download files to the cache partition that won't be automatically
* purged when space is needed.
*/
public static final String PERMISSION_CACHE_NON_PURGEABLE =
"android.permission.DOWNLOAD_CACHE_NON_PURGEABLE";
/**
* The permission to download files without any system notification being shown.
*/
public static final String PERMISSION_NO_NOTIFICATION =
"android.permission.DOWNLOAD_WITHOUT_NOTIFICATION";
/**
* The content:// URI to access downloads owned by the caller's UID.
*/
public static final Uri CONTENT_URI =
Uri.parse("content://downloads/my_downloads");
public static final Uri ALL_DOWNLOADS_CONTENT_URI =
Uri.parse("content://downloads/all_downloads");
public static final String ACTION_DOWNLOAD_COMPLETED =
"android.intent.action.DOWNLOAD_COMPLETED";
public static final String ACTION_NOTIFICATION_CLICKED =
"android.intent.action.DOWNLOAD_NOTIFICATION_CLICKED";
public static final String COLUMN_URI = "uri";
public static final String COLUMN_APP_DATA = "entity";
public static final String COLUMN_NO_INTEGRITY = "no_integrity";
public static final String COLUMN_FILE_NAME_HINT = "hint";
public static final String _DATA = "_data";
public static final String COLUMN_MIME_TYPE = "mimetype";
public static final String COLUMN_DESTINATION = "destination";
public static final String COLUMN_VISIBILITY = "visibility";
public static final String COLUMN_CONTROL = "control";
public static final String COLUMN_STATUS = "status";
public static final String COLUMN_LAST_MODIFICATION = "lastmod";
public static final String COLUMN_NOTIFICATION_PACKAGE = "notificationpackage";
public static final String COLUMN_NOTIFICATION_CLASS = "notificationclass";
public static final String COLUMN_NOTIFICATION_EXTRAS = "notificationextras";
public static final String COLUMN_COOKIE_DATA = "cookiedata";
public static final String COLUMN_USER_AGENT = "useragent";
public static final String COLUMN_REFERER = "referer";
public static final String COLUMN_TOTAL_BYTES = "total_bytes";
public static final String COLUMN_CURRENT_BYTES = "current_bytes";
public static final String COLUMN_OTHER_UID = "otheruid";
public static final String COLUMN_TITLE = "title";
public static final String COLUMN_DESCRIPTION = "description";
public static final String COLUMN_IS_PUBLIC_API = "is_public_api";
public static final String COLUMN_ALLOW_ROAMING = "allow_roaming";
public static final String COLUMN_ALLOWED_NETWORK_TYPES = "allowed_network_types";
public static final String COLUMN_IS_VISIBLE_IN_DOWNLOADS_UI = "is_visible_in_downloads_ui";
public static final String COLUMN_BYPASS_RECOMMENDED_SIZE_LIMIT =
"bypass_recommended_size_limit";
public static final String COLUMN_DELETED = "deleted";
public static final String COLUMN_MEDIAPROVIDER_URI = "mediaprovider_uri";
/*
* Lists the destinations that an application can specify for a download.
*/
public static final int DESTINATION_EXTERNAL = 0;
public static final int DESTINATION_CACHE_PARTITION = 1;
public static final int DESTINATION_CACHE_PARTITION_PURGEABLE = 2;
/**
* This download will be saved to the download manager's private
* partition, as with DESTINATION_CACHE_PARTITION, but the download
* will not proceed if the user is on a roaming data connection.
*/
public static final int DESTINATION_CACHE_PARTITION_NOROAMING = 3;
/**
* This download will be saved to the location given by the file URI in
* {@link #COLUMN_FILE_NAME_HINT}.
*/
public static final int DESTINATION_FILE_URI = 4;
/**
* This download is allowed to run.
*/
public static final int CONTROL_RUN = 0;
/**
* This download must pause at the first opportunity.
*/
public static final int CONTROL_PAUSED = 1;
/**
* Returns whether the status is informational (i.e. 1xx).
*/
public static boolean isStatusInformational(int status) {
return (status >= 100 && status < 200);
}
/**
* Returns whether the status is a success (i.e. 2xx).
*/
public static boolean isStatusSuccess(int status) {
return (status >= 200 && status < 300);
}
/**
* Returns whether the status is an error (i.e. 4xx or 5xx).
*/
public static boolean isStatusError(int status) {
return (status >= 400 && status < 600);
}
/**
* Returns whether the status is a client error (i.e. 4xx).
*/
public static boolean isStatusClientError(int status) {
return (status >= 400 && status < 500);
}
/**
* Returns whether the status is a server error (i.e. 5xx).
*/
public static boolean isStatusServerError(int status) {
return (status >= 500 && status < 600);
}
/**
* Returns whether the download has completed (either with success or
* error).
*/
public static boolean isStatusCompleted(int status) {
return (status >= 200 && status < 300) || (status >= 400 && status < 600);
}
/**
* This download hasn't stated yet
*/
public static final int STATUS_PENDING = 190;
/**
* This download has started
*/
public static final int STATUS_RUNNING = 192;
/**
* This download has been paused by the owning app.
*/
public static final int STATUS_PAUSED_BY_APP = 193;
/**
* This download encountered some network error and is waiting before retrying the request.
*/
public static final int STATUS_WAITING_TO_RETRY = 194;
/**
* This download is waiting for network connectivity to proceed.
*/
public static final int STATUS_WAITING_FOR_NETWORK = 195;
/**
* This download exceeded a size limit for mobile networks and is waiting for a Wi-Fi
* connection to proceed.
*/
public static final int STATUS_QUEUED_FOR_WIFI = 196;
public static final int STATUS_SUCCESS = 200;
public static final int STATUS_BAD_REQUEST = 400;
/**
* This download can't be performed because the content type cannot be
* handled.
*/
public static final int STATUS_NOT_ACCEPTABLE = 406;
public static final int STATUS_LENGTH_REQUIRED = 411;
/**
* This download was interrupted and cannot be resumed.
* This is the code for the HTTP error "Precondition Failed", and it is
* also used in situations where the client doesn't have an ETag at all.
*/
public static final int STATUS_PRECONDITION_FAILED = 412;
/**
* The lowest-valued error status that is not an actual HTTP status code.
*/
public static final int MIN_ARTIFICIAL_ERROR_STATUS = 488;
/**
* The requested destination file already exists.
*/
public static final int STATUS_FILE_ALREADY_EXISTS_ERROR = 488;
/**
* Some possibly transient error occurred, but we can't resume the download.
*/
public static final int STATUS_CANNOT_RESUME = 489;
/**
* This download was canceled
*/
public static final int STATUS_CANCELED = 490;
public static final int STATUS_UNKNOWN_ERROR = 491;
public static final int STATUS_FILE_ERROR = 492;
/**
* This download couldn't be completed because of an HTTP
* redirect response that the download manager couldn't
* handle.
*/
public static final int STATUS_UNHANDLED_REDIRECT = 493;
/**
* This download couldn't be completed because of an
* unspecified unhandled HTTP code.
*/
public static final int STATUS_UNHANDLED_HTTP_CODE = 494;
/**
* This download couldn't be completed because of an
* error receiving or processing data at the HTTP level.
*/
public static final int STATUS_HTTP_DATA_ERROR = 495;
/**
* This download couldn't be completed because of an
* HttpException while setting up the request.
*/
public static final int STATUS_HTTP_EXCEPTION = 496;
/**
* This download couldn't be completed because there were
* too many redirects.
*/
public static final int STATUS_TOO_MANY_REDIRECTS = 497;
/**
* This download couldn't be completed due to insufficient storage
* space. Typically, this is because the SD card is full.
*/
public static final int STATUS_INSUFFICIENT_SPACE_ERROR = 498;
/**
* This download couldn't be completed because no external storage
* device was found. Typically, this is because the SD card is not
* mounted.
*/
public static final int STATUS_DEVICE_NOT_FOUND_ERROR = 499;
/**
* This download is visible but only shows in the notifications
* while it's in progress.
*/
public static final int VISIBILITY_VISIBLE = 0;
/**
* This download is visible and shows in the notifications while
* in progress and after completion.
*/
public static final int VISIBILITY_VISIBLE_NOTIFY_COMPLETED = 1;
/**
* This download doesn't show in the UI or in the notifications.
*/
public static final int VISIBILITY_HIDDEN = 2;
/**
* Constants related to HTTP request headers associated with each download.
*/
public static class RequestHeaders {
public static final String HEADERS_DB_TABLE = "request_headers";
public static final String COLUMN_DOWNLOAD_ID = "download_id";
public static final String COLUMN_HEADER = "header";
public static final String COLUMN_VALUE = "value";
/**
* Path segment to add to a download URI to retrieve request headers
*/
public static final String URI_SEGMENT = "headers";
/**
* Prefix for ContentValues keys that contain HTTP header lines, to be passed to
* DownloadProvider.insert().
*/
public static final String INSERT_KEY_PREFIX = "http_header_";
}
}
}
मैं केवल अपने उदाहरण का अनुसरण करते पाश के लिए सभी अनुरोधों का बना दिया। आपके उदाहरण के लिए धन्यवाद लेकिन समस्या का सामना करने में मुझे समस्या है कि मैं ACTION_DOWNLOAD_COMPLETE प्रसारण रिसीवर में एक से अधिक बार एक ही डाउनलोड आईडी प्राप्त कर रहा हूं। आप इस प्रश्न को भी देख सकते हैं http://stackoverflow.com/questions/8937817/downloadmanager-action-download-complete-broadcast-receiver-receiving-same-downl – vrs
मैं 'डाउनलोड प्रबंधक' को एक साथ फ़ाइलों को डाउनलोड करने के लिए कैसे मजबूर कर सकता हूं ? या मुझे एक और कक्षा या दृष्टिकोण अपनाना चाहिए? – Stallman
@vrs उदाहरण क्या है? – Stallman