public final class ContentDataSource extends BaseDataSource
DataSource for reading from a content URI.| Modifier and Type | Class and Description |
|---|---|
static class |
ContentDataSource.ContentDataSourceException
Thrown when an
IOException is encountered reading from a content URI. |
DataSource.Factory| Constructor and Description |
|---|
ContentDataSource(android.content.Context context) |
ContentDataSource(android.content.Context context,
TransferListener listener)
Deprecated.
|
| Modifier and Type | Method and Description |
|---|---|
void |
close()
Closes the source.
|
android.net.Uri |
getUri()
When the source is open, returns the
Uri from which data is being read. |
long |
open(DataSpec dataSpec)
Opens the source to read the specified data.
|
int |
read(byte[] buffer,
int offset,
int readLength)
Reads up to
readLength bytes of data and stores them into buffer, starting at
index offset. |
addTransferListener, bytesTransferred, transferEnded, transferInitializing, transferStartedclone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, waitgetResponseHeaderspublic ContentDataSource(android.content.Context context)
context - A context.@Deprecated
public ContentDataSource(android.content.Context context,
@Nullable
TransferListener listener)
ContentDataSource(Context) and BaseDataSource.addTransferListener(TransferListener).context - A context.listener - An optional listener.public long open(DataSpec dataSpec) throws ContentDataSource.ContentDataSourceException
DataSource
Note: If an IOException is thrown, callers must still call DataSource.close() to ensure
that any partial effects of the invocation are cleaned up.
dataSpec - Defines the data to be read.DataSpec.length equals C.LENGTH_UNSET) this value
is the resolved length of the request, or C.LENGTH_UNSET if the length is still
unresolved. For all other requests, the value returned will be equal to the request's
DataSpec.length.ContentDataSource.ContentDataSourceExceptionpublic int read(byte[] buffer,
int offset,
int readLength)
throws ContentDataSource.ContentDataSourceException
DataSourcereadLength bytes of data and stores them into buffer, starting at
index offset.
If readLength is zero then 0 is returned. Otherwise, if no data is available because
the end of the opened range has been reached, then C.RESULT_END_OF_INPUT is returned.
Otherwise, the call will block until at least one byte of data has been read and the number of
bytes read is returned.
buffer - The buffer into which the read data should be stored.offset - The start offset into buffer at which data should be written.readLength - The maximum number of bytes to read.C.RESULT_END_OF_INPUT if no data is available
because the end of the opened range has been reached.ContentDataSource.ContentDataSourceException@Nullable public android.net.Uri getUri()
DataSourceUri from which data is being read. The returned
Uri will be identical to the one passed DataSource.open(DataSpec) in the DataSpec
unless redirection has occurred. If redirection has occurred, the Uri after redirection
is returned.Uri from which data is being read, or null if the source is not open.public void close()
throws ContentDataSource.ContentDataSourceException
DataSource
Note: This method must be called even if the corresponding call to DataSource.open(DataSpec)
threw an IOException. See DataSource.open(DataSpec) for more details.