DefaultDataSource (ExoPlayer library)

java.lang.Object
- com.google.android.exoplayer2.upstream.DefaultDataSource

All Implemented Interfaces:

DataReader, DataSource
```
public final class DefaultDataSource
extends Object
implements DataSource
```
A DataSource that supports multiple URI schemes. The supported schemes are:
- file: For fetching data from a local file (e.g. file:///path/to/media/media.mp4, or just /path/to/media/media.mp4 because the implementation assumes that a URI without a scheme is a local file URI).
- asset: For fetching data from an asset in the application's apk (e.g. asset:///media.mp4).
- rawresource: For fetching data from a raw resource in the application's apk (e.g. rawresource:///resourceId, where rawResourceId is the integer identifier of the raw resource).
- android.resource: For fetching data in the application's apk (e.g. android.resource:///resourceId or android.resource://resourceType/resourceName). See RawResourceDataSource for more information about the URI form.
- content: For fetching data from a content URI (e.g. content://authority/path/123).
- rtmp: For fetching data over RTMP. Only supported if the project using ExoPlayer has an explicit dependency on ExoPlayer's RTMP extension.
- data: For parsing data inlined in the URI as defined in RFC 2397.
- udp: For fetching data over UDP (e.g. udp://something.com/media).
- http(s): For fetching data over HTTP and HTTPS (e.g. https://www.something.com/media.mp4), if constructed using DefaultDataSource(Context, String, boolean), or any other schemes supported by a base data source if constructed using DefaultDataSource(Context, DataSource).

Nested Class Summary
- Nested classes/interfaces inherited from interface com.google.android.exoplayer2.upstream.DataSource
  DataSource.Factory

Constructor Summary

Constructors
Constructor	Description
`DefaultDataSource(Context context, boolean allowCrossProtocolRedirects)`	Constructs a new instance, optionally configured to follow cross-protocol redirects.
`DefaultDataSource(Context context, DataSource baseDataSource)`	Constructs a new instance that delegates to a provided `DataSource` for URI schemes other than file, asset and content.
`DefaultDataSource(Context context, String userAgent, boolean allowCrossProtocolRedirects)`	Constructs a new instance, optionally configured to follow cross-protocol redirects.
`DefaultDataSource(Context context, String userAgent, int connectTimeoutMillis, int readTimeoutMillis, boolean allowCrossProtocolRedirects)`	Constructs a new instance, optionally configured to follow cross-protocol redirects.

Method Summary

All Methods Instance Methods Concrete Methods
Modifier and Type	Method	Description
`void`	`addTransferListener(TransferListener transferListener)`	Adds a `TransferListener` to listen to data transfers.
`void`	`close()`	Closes the source.
`Map<String,List<String>>`	`getResponseHeaders()`	When the source is open, returns the response headers associated with the last `DataSource.open(com.google.android.exoplayer2.upstream.DataSpec)` call.
`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 `length` bytes of data from the input.

Methods inherited from class java.lang.Object
clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

- Constructor Detail
  - DefaultDataSource
```
public DefaultDataSource(Context context,
                         boolean allowCrossProtocolRedirects)
```
    Constructs a new instance, optionally configured to follow cross-protocol redirects.
    
    Parameters:
    
    context - A context.
  - DefaultDataSource
```
public DefaultDataSource(Context context,
                         @Nullable
                         String userAgent,
                         boolean allowCrossProtocolRedirects)
```
    Constructs a new instance, optionally configured to follow cross-protocol redirects.
    
    Parameters:
    
    context - A context.
    
    userAgent - The user agent that will be used when requesting remote data, or null to use the default user agent of the underlying platform.
    
    allowCrossProtocolRedirects - Whether cross-protocol redirects (i.e. redirects from HTTP to HTTPS and vice versa) are enabled when fetching remote data.
  - DefaultDataSource
```
public DefaultDataSource(Context context,
                         @Nullable
                         String userAgent,
                         int connectTimeoutMillis,
                         int readTimeoutMillis,
                         boolean allowCrossProtocolRedirects)
```
    Constructs a new instance, optionally configured to follow cross-protocol redirects.
    
    Parameters:
    
    context - A context.
    
    userAgent - The user agent that will be used when requesting remote data, or null to use the default user agent of the underlying platform.
    
    connectTimeoutMillis - The connection timeout that should be used when requesting remote data, in milliseconds. A timeout of zero is interpreted as an infinite timeout.
    
    readTimeoutMillis - The read timeout that should be used when requesting remote data, in milliseconds. A timeout of zero is interpreted as an infinite timeout.
    
    allowCrossProtocolRedirects - Whether cross-protocol redirects (i.e. redirects from HTTP to HTTPS and vice versa) are enabled when fetching remote data.
  - DefaultDataSource
```
public DefaultDataSource(Context context,
                         DataSource baseDataSource)
```
    Constructs a new instance that delegates to a provided DataSource for URI schemes other than file, asset and content.
    
    Parameters:
    
    context - A context.
    
    baseDataSource - A DataSource to use for URI schemes other than file, asset and content. This DataSource should normally support at least http(s).
- Method Detail
  - addTransferListener
```
public void addTransferListener(TransferListener transferListener)
```
    Description copied from interface: DataSource
    
    Adds a TransferListener to listen to data transfers. This method is not thread-safe.
    
    Specified by:
    
    addTransferListener in interface DataSource
    
    Parameters:
    
    transferListener - A TransferListener.
  - open
```
public long open(DataSpec dataSpec)
          throws IOException
```
    Description copied from interface: DataSource
    
    Opens the source to read the specified data.
    Note: If an IOException is thrown, callers must still call DataSource.close() to ensure that any partial effects of the invocation are cleaned up.
    
    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_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.
    
    Throws:
    
    IOException - If an error occurs opening the source. DataSourceException can be thrown or used as a cause of the thrown exception to specify the reason of the error.
  - read
```
public int read(byte[] buffer,
                int offset,
                int readLength)
         throws IOException
```
    Description copied from interface: DataReader
    
    Reads up to length bytes of data from the input.
    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.
    
    Specified by:
    
    read in interface DataReader
    
    Parameters:
    
    buffer - A target array into which data should be written.
    
    offset - The offset into the target array at which to write.
    
    readLength - The maximum number of bytes to read from the input.
    
    Returns:
    
    The number of bytes read, or C.RESULT_END_OF_INPUT if the input has ended. This may be less than length because the end of the input (or available data) was reached, the method was interrupted, or the operation was aborted early for another reason.
    
    Throws:
    
    IOException - If an error occurs reading from the input.
  - getUri
```
@Nullable
public Uri getUri()
```
    Description copied from interface: DataSource
    
    When the source is open, returns the Uri 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.
    
    Specified by:
    
    getUri in interface DataSource
    
    Returns:
    
    The Uri from which data is being read, or null if the source is not open.
  - getResponseHeaders
```
public Map<String,List<String>> getResponseHeaders()
```
    Description copied from interface: DataSource
    
    When the source is open, returns the response headers associated with the last DataSource.open(com.google.android.exoplayer2.upstream.DataSpec) call. Otherwise, returns an empty map.
    Key look-up in the returned map is case-insensitive.
    
    Specified by:
    
    getResponseHeaders in interface DataSource
  - close
```
public void close()
           throws IOException
```
    Description copied from interface: DataSource
    
    Closes the source.
    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.
    
    Specified by:
    
    close in interface DataSource
    
    Throws:
    
    IOException - If an error occurs closing the source.

Class DefaultDataSource

Nested Class Summary

Nested classes/interfaces inherited from interface com.google.android.exoplayer2.upstream.DataSource

Constructor Summary

Method Summary

Methods inherited from class java.lang.Object

Constructor Detail

DefaultDataSource

DefaultDataSource

DefaultDataSource

DefaultDataSource

Method Detail

addTransferListener

open

read

getUri

getResponseHeaders

close