com.google.android.exoplayer.upstream

Class ContentDataSource

java.lang.Object

com.google.android.exoplayer.upstream.ContentDataSource

All Implemented Interfaces:

DataSource, UriDataSource

public final class ContentDataSource
extends Object
implements UriDataSource

A content URI UriDataSource.

Nested Class Summary

Nested Classes

Modifier and Type	Class and Description
static class	ContentDataSource.ContentDataSourceException Thrown when an IOException is encountered reading from a content URI.

Constructor Summary

Constructors

Constructor and Description
ContentDataSource(Context context) Constructs a new DataSource that retrieves data from a content provider.
ContentDataSource(Context context, TransferListener listener) Constructs a new DataSource that retrieves data from a content provider.

Method Summary

Modifier and Type	Method and Description
void	close() Closes the DataSource.
String	getUri() When the source is open, returns the URI from which data is being read.
long	open(DataSpec dataSpec) Opens the DataSource to read the specified data.
int	read(byte[] buffer, int offset, int readLength) Reads up to length bytes of data and stores them into buffer, starting at index offset.

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Constructor Detail

ContentDataSource

public ContentDataSource(Context context)

Constructs a new DataSource that retrieves data from a content provider.

ContentDataSource

public ContentDataSource(Context context,
                         TransferListener listener)

Constructs a new DataSource that retrieves data from a content provider.

Parameters:

listener - An optional listener. Specify null for no listener.

Method Detail

open

public long open(DataSpec dataSpec)
          throws ContentDataSource.ContentDataSourceException

Description copied from interface: DataSource

Opens the DataSource to read the specified data. Calls to DataSource.open(DataSpec) and DataSource.close() must be balanced.

Note: If DataSource.open(DataSpec) throws an IOException, callers must still call DataSource.close() to ensure that any partial effects of the DataSource.open(DataSpec) invocation are cleaned up. Implementations of this class can assume that callers will call DataSource.close() in this case.

Specified by:

open in interface DataSource

Parameters:

dataSpec - Defines the data to be read.

Returns:

The number of bytes that can be read from the opened source. For unbounded requests (i.e. requests where DataSpec.length equals C.LENGTH_UNBOUNDED) this value is the resolved length of the request, or C.LENGTH_UNBOUNDED if the length is still unresolved. For all other requests, the value returned will be equal to the request's DataSpec.length.

Throws:

ContentDataSource.ContentDataSourceException

read

public int read(byte[] buffer,
                int offset,
                int readLength)
         throws ContentDataSource.ContentDataSourceException

Description copied from interface: DataSource

Reads up to length bytes of data and stores them into buffer, starting at index offset.

This method blocks until at least one byte of data can be read, the end of the opened range is detected, or an exception is thrown.

Specified by:

read in interface DataSource

Parameters:

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.

Returns:

The number of bytes read, or C.RESULT_END_OF_INPUT if the end of the opened range is reached.

Throws:

ContentDataSource.ContentDataSourceException

getUri

public String getUri()

Description copied from interface: UriDataSource

When the source is open, returns the URI from which data is being read.

If redirection occurred, the URI after redirection is the one returned.

Specified by:

getUri in interface UriDataSource

Returns:

When the source is open, the URI from which data is being read. Null otherwise.

close

public void close()
           throws ContentDataSource.ContentDataSourceException

Description copied from interface: DataSource

Closes the DataSource.

Note: This method will be called even if the corresponding call to DataSource.open(DataSpec) threw an IOException. See DataSource.open(DataSpec) for more details.

Specified by:

close in interface DataSource

Throws:

ContentDataSource.ContentDataSourceException