java.lang.Object
- com.google.android.exoplayer2.offline.StreamKey

All Implemented Interfaces:

Parcelable, Comparable<StreamKey>
```
public final class StreamKey
extends Object
implements Comparable<StreamKey>, Parcelable
```
A key for a subset of media that can be separately loaded (a "stream").
The stream key consists of a period index, a group index within the period and a stream index within the group. The interpretation of these indices depends on the type of media for which the stream key is used. Note that they are not the same as track group and track indices, because multiple tracks can be multiplexed into a single stream.
Application code should not generally attempt to build StreamKey instances directly. Instead, DownloadHelper.getDownloadRequest can be used to generate download requests with the correct StreamKeys for the track selections that have been configured on the helper. MediaPeriod.getStreamKeys provides a lower level way of generating StreamKeys corresponding to a particular track selection.

Nested Class Summary
- Nested classes/interfaces inherited from interface android.os.Parcelable
  Parcelable.ClassLoaderCreator<T extends Object>, Parcelable.Creator<T extends Object>

Field Summary

Fields
Modifier and Type	Field	Description
`static Parcelable.Creator<StreamKey>`	`CREATOR`
`int`	`groupIndex`	The group index.
`int`	`periodIndex`	The period index.
`int`	`streamIndex`	The stream index.
`int`	`trackIndex`	Deprecated. Use `streamIndex`.

Fields inherited from interface android.os.Parcelable
CONTENTS_FILE_DESCRIPTOR, PARCELABLE_WRITE_RETURN_VALUE

Constructor Summary

Constructors
Constructor	Description
`StreamKey(int groupIndex, int streamIndex)`	Creates an instance with `periodIndex` set to 0.
`StreamKey(int periodIndex, int groupIndex, int streamIndex)`	Creates an instance.

Method Summary

All Methods Instance Methods Concrete Methods
Modifier and Type	Method	Description
`int`	`compareTo(StreamKey o)`
`int`	`describeContents()`
`boolean`	`equals(Object o)`
`int`	`hashCode()`
`String`	`toString()`
`void`	`writeToParcel(Parcel dest, int flags)`

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

- Field Detail
  - periodIndex
```
public final int periodIndex
```
    The period index.
  - groupIndex
```
public final int groupIndex
```
    The group index.
  - streamIndex
```
public final int streamIndex
```
    The stream index.
  - trackIndex
```
@Deprecated
public final int trackIndex
```
    Deprecated.
    Use streamIndex.
  - CREATOR
```
public static final Parcelable.Creator<StreamKey> CREATOR
```
- Constructor Detail
  - StreamKey
```
public StreamKey(int groupIndex,
                 int streamIndex)
```
    Creates an instance with periodIndex set to 0.
    
    Parameters:
    
    groupIndex - The group index.
    
    streamIndex - The stream index.
  - StreamKey
```
public StreamKey(int periodIndex,
                 int groupIndex,
                 int streamIndex)
```
    Creates an instance.
    
    Parameters:
    
    periodIndex - The period index.
    
    groupIndex - The group index.
    
    streamIndex - The stream index.
- Method Detail
  - toString
```
public String toString()
```
    Overrides:
    
    toString in class Object
  - equals
```
public boolean equals(@Nullable
                      Object o)
```
    Overrides:
    
    equals in class Object
  - hashCode
```
public int hashCode()
```
    Overrides:
    
    hashCode in class Object
  - compareTo
```
public int compareTo(StreamKey o)
```
    Specified by:
    
    compareTo in interface Comparable<StreamKey>
  - describeContents
```
public int describeContents()
```
    Specified by:
    
    describeContents in interface Parcelable
  - writeToParcel
```
public void writeToParcel(Parcel dest,
                          int flags)
```
    Specified by:
    
    writeToParcel in interface Parcelable

Class StreamKey

Nested Class Summary

Nested classes/interfaces inherited from interface android.os.Parcelable

Field Summary

Fields inherited from interface android.os.Parcelable

Constructor Summary

Method Summary

Methods inherited from class java.lang.Object

Field Detail

periodIndex

groupIndex

streamIndex

trackIndex

CREATOR

Constructor Detail

StreamKey

StreamKey

Method Detail

toString

equals

hashCode

compareTo

describeContents

writeToParcel