DebugTextViewHelper (ExoPlayer library)

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

All Implemented Interfaces:

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

Constructor Summary

Constructors
Constructor Description

DebugTextViewHelper(SimpleExoPlayer player, TextView textView)

Constructors
Constructor	Description
`DebugTextViewHelper(SimpleExoPlayer 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(int playbackState)`	Called when the value returned from `Player.getPlaybackState()` changes.
`void`	`onPlayWhenReadyChanged(boolean playWhenReady, int playbackState)`	Called when the value returned from `Player.getPlayWhenReady()` changes.
`void`	`onPositionDiscontinuity(int reason)`	Called when a position discontinuity occurs without a change to the timeline.
`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

- Constructor Detail
  - DebugTextViewHelper
```
public DebugTextViewHelper(SimpleExoPlayer player,
                           TextView textView)
```
    Parameters:
    
    player - The SimpleExoPlayer 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
                                         int playbackState)
```
    Description copied from interface: Player.EventListener
    
    Called when the value returned from Player.getPlaybackState() changes.
    Player.EventListener.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.EventListener
    
    Parameters:
    
    playbackState - The new playback state.
  - onPlayWhenReadyChanged
```
public final void onPlayWhenReadyChanged(boolean playWhenReady,
                                         @PlayWhenReadyChangeReason
                                         int playbackState)
```
    Description copied from interface: Player.EventListener
    
    Called when the value returned from Player.getPlayWhenReady() changes.
    Player.EventListener.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.EventListener
    
    Parameters:
    
    playWhenReady - Whether playback will proceed when ready.
    
    playbackState - The reason for the change.
  - onPositionDiscontinuity
```
public final void onPositionDiscontinuity(@DiscontinuityReason
                                          int reason)
```
    Description copied from interface: Player.EventListener
    
    Called when a position discontinuity occurs without a change to the timeline. A position discontinuity occurs when the current window or period index changes (as a result of playback transitioning from one period in the timeline to the next), or when the playback position jumps within the period currently being played (as a result of a seek being performed, or when the source introduces a discontinuity internally).
    When a position discontinuity occurs as a result of a change to the timeline this method is not called. Player.EventListener.onTimelineChanged(Timeline, int) is called in this case.
    Player.EventListener.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.EventListener
    
    Parameters:
    
    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.EventListener

Constructor Detail

DebugTextViewHelper

Method Detail

start

stop

onPlaybackStateChanged

onPlayWhenReadyChanged

onPositionDiscontinuity

run

updateAndPost

getDebugString

getPlayerStateString

getVideoString

getAudioString