java.lang.Object
- com.google.android.exoplayer2.util.DebugTextViewHelper

All Implemented Interfaces:

Player.Listener, Runnable
```
public class DebugTextViewHelper
extends Object
implements Player.Listener, Runnable
```
A helper class for periodically updating a TextView with debug information obtained from an ExoPlayer.

Constructor Summary

Constructors
Constructor Description

DebugTextViewHelper(ExoPlayer player, TextView textView)

Method Summary

All Methods Instance Methods Concrete Methods
Modifier and Type	Method	Description
`protected String`	`getAudioString()`	Returns a string containing audio debugging information.
`protected String`	`getDebugString()`	Returns the debugging information string to be shown by the target `TextView`.
`protected String`	`getPlayerStateString()`	Returns a string containing player state debugging information.
`protected String`	`getVideoString()`	Returns a string containing video debugging information.
`void`	`onPlaybackStateChanged(@com.google.android.exoplayer2.Player.State int playbackState)`	Called when the value returned from `Player.getPlaybackState()` changes.
`void`	`onPlayWhenReadyChanged(boolean playWhenReady, @com.google.android.exoplayer2.Player.PlayWhenReadyChangeReason int reason)`	Called when the value returned from `Player.getPlayWhenReady()` changes.
`void`	`onPositionDiscontinuity(Player.PositionInfo oldPosition, Player.PositionInfo newPosition, @com.google.android.exoplayer2.Player.DiscontinuityReason int reason)`	Called when a position discontinuity occurs.
`void`	`run()`
`void`	`start()`	Starts periodic updates of the `TextView`.
`void`	`stop()`	Stops periodic updates of the `TextView`.
`protected void`	`updateAndPost()`

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

Methods inherited from interface com.google.android.exoplayer2.Player.Listener
onAudioAttributesChanged, onAudioSessionIdChanged, onAvailableCommandsChanged, onCues, onDeviceInfoChanged, onDeviceVolumeChanged, onEvents, onIsLoadingChanged, onIsPlayingChanged, onLoadingChanged, onMaxSeekToPreviousPositionChanged, onMediaItemTransition, onMediaMetadataChanged, onMetadata, onPlaybackParametersChanged, onPlaybackSuppressionReasonChanged, onPlayerError, onPlayerErrorChanged, onPlayerStateChanged, onPlaylistMetadataChanged, onPositionDiscontinuity, onRenderedFirstFrame, onRepeatModeChanged, onSeekBackIncrementChanged, onSeekForwardIncrementChanged, onSeekProcessed, onShuffleModeEnabledChanged, onSkipSilenceEnabledChanged, onSurfaceSizeChanged, onTimelineChanged, onTracksChanged, onTrackSelectionParametersChanged, onTracksInfoChanged, onVideoSizeChanged, onVolumeChanged

- Constructor Detail
  - DebugTextViewHelper
```
public DebugTextViewHelper(ExoPlayer player,
                           TextView textView)
```
    Parameters:
    
    player - The ExoPlayer from which debug information should be obtained. Only players which are accessed on the main thread are supported (player.getApplicationLooper() == Looper.getMainLooper()).
    
    textView - The TextView that should be updated to display the information.
- Method Detail
  - start
```
public final void start()
```
    Starts periodic updates of the TextView. Must be called from the application's main thread.
  - stop
```
public final void stop()
```
    Stops periodic updates of the TextView. Must be called from the application's main thread.
  - onPlaybackStateChanged
```
public final void onPlaybackStateChanged(@State
                                         @com.google.android.exoplayer2.Player.State int playbackState)
```
    Description copied from interface: Player.Listener
    
    Called when the value returned from Player.getPlaybackState() changes.
    Player.Listener.onEvents(Player, Events) will also be called to report this event along with other events that happen in the same Looper message queue iteration.
    
    Specified by:
    
    onPlaybackStateChanged in interface Player.Listener
    
    Parameters:
    
    playbackState - The new playback state.
  - onPlayWhenReadyChanged
```
public final void onPlayWhenReadyChanged(boolean playWhenReady,
                                         @PlayWhenReadyChangeReason
                                         @com.google.android.exoplayer2.Player.PlayWhenReadyChangeReason int reason)
```
    Description copied from interface: Player.Listener
    
    Called when the value returned from Player.getPlayWhenReady() changes.
    Player.Listener.onEvents(Player, Events) will also be called to report this event along with other events that happen in the same Looper message queue iteration.
    
    Specified by:
    
    onPlayWhenReadyChanged in interface Player.Listener
    
    Parameters:
    
    playWhenReady - Whether playback will proceed when ready.
    
    reason - The reason for the change.
  - onPositionDiscontinuity
```
public final void onPositionDiscontinuity(Player.PositionInfo oldPosition,
                                          Player.PositionInfo newPosition,
                                          @DiscontinuityReason
                                          @com.google.android.exoplayer2.Player.DiscontinuityReason int reason)
```
    Description copied from interface: Player.Listener
    
    Called when a position discontinuity occurs.
    A position discontinuity occurs when the playing period changes, the playback position jumps within the period currently being played, or when the playing period has been skipped or removed.
    Player.Listener.onEvents(Player, Events) will also be called to report this event along with other events that happen in the same Looper message queue iteration.
    
    Specified by:
    
    onPositionDiscontinuity in interface Player.Listener
    
    Parameters:
    
    oldPosition - The position before the discontinuity.
    
    newPosition - The position after the discontinuity.
    
    reason - The Player.DiscontinuityReason responsible for the discontinuity.
  - run
```
public final void run()
```
    Specified by:
    
    run in interface Runnable
  - updateAndPost
```
protected final void updateAndPost()
```
  - getDebugString
```
protected String getDebugString()
```
    Returns the debugging information string to be shown by the target TextView.
  - getPlayerStateString
```
protected String getPlayerStateString()
```
    Returns a string containing player state debugging information.
  - getVideoString
```
protected String getVideoString()
```
    Returns a string containing video debugging information.
  - getAudioString
```
protected String getAudioString()
```
    Returns a string containing audio debugging information.

Class DebugTextViewHelper

Constructor Summary

Method Summary

Methods inherited from class java.lang.Object

Methods inherited from interface com.google.android.exoplayer2.Player.Listener

Constructor Detail

DebugTextViewHelper

Method Detail

start

stop

onPlaybackStateChanged

onPlayWhenReadyChanged

onPositionDiscontinuity

run

updateAndPost

getDebugString

getPlayerStateString

getVideoString

getAudioString