我找遍了所有的地方，都没有找到解决这个错误的方法。我知道在StackOverflow上有很多与这个主题相关的问题，但我不明白。而且我使用的是ExoPlayer。
错误：方法没有覆盖或实现一个超类型的方法。
安卓工作室强调8 @Overrides.
AdaptiveMediaSourceEventListeners的方法被划成红色。
onTimelineChanged 被划成红色
onPositionDiscontinuity 被划成红色
MainActivity。
package rusiptv.net;
//http://mos.rusiptv.net:8080/live/@celalsonat/784512/94815.m3u8
public class MainActivity extends AppCompatActivity implements ExoPlayer.EventListener {
private SimpleExoPlayerView simpleExoPlayerView;
private String hlsVideoUri = "http://mos.rusiptv.net:8080/live/@celalsonat/784512/94815.m3u8";
private SimpleExoPlayer player;
private ProgressBar progressBar;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
// 1. Create a default TrackSelector
Handler mainHandler = new Handler();
BandwidthMeter bandwidthMeter = new DefaultBandwidthMeter();
TrackSelection.Factory videoTrackSelectionFactory = new
AdaptiveTrackSelection.Factory(bandwidthMeter);
TrackSelector trackSelector = new DefaultTrackSelector(videoTrackSelectionFactory);
// 2. Create a default LoadControl
LoadControl loadControl = new DefaultLoadControl();
// 3. Create the player
player = ExoPlayerFactory.newSimpleInstance(this, trackSelector, loadControl);
simpleExoPlayerView = (SimpleExoPlayerView)findViewById(R.id.player_view);
simpleExoPlayerView.setPlayer(player);
// Measures bandwidth during playback. Can be null if not required.
DefaultBandwidthMeter defaultBandwidthMeter = new DefaultBandwidthMeter();
// Produces DataSource instances through which media data is loaded.
DataSource.Factory dataSourceFactory = new DefaultDataSourceFactory(this, Util.getUserAgent(this, "Exo2"), defaultBandwidthMeter);
// Produces Extractor instances for parsing the media data.
ExtractorsFactory extractorsFactory = new DefaultExtractorsFactory();
// This is the MediaSource representing the media to be played.
HlsMediaSource hlsMediaSource = new HlsMediaSource(Uri.parse(hlsVideoUri), dataSourceFactory, mainHandler, new AdaptiveMediaSourceEventListener(){
@Override
public void onLoadStarted(DataSpec dataSpec, int dataType, int trackType, Format trackFormat, int trackSelectionReason, Object trackSelectionData, long mediaStartTimeMs, long mediaEndTimeMs, long elapsedRealtimeMs){
}
@Override
public void onLoadCompleted(DataSpec dataSpec, int dataType, int trackType, Format
trackFormat, int trackSelectionReason, Object trackSelectionData, long mediaStartTimeMs,
long mediaEndTimeMs, long elapsedRealtimeMs, long loadDurationMs, long bytesLoaded) {
}
@Override
public void onLoadCanceled(DataSpec dataSpec, int dataType, int trackType, Format
trackFormat, int trackSelectionReason, Object trackSelectionData, long mediaStartTimeMs,
long mediaEndTimeMs, long elapsedRealtimeMs, long loadDurationMs, long bytesLoaded) {
}
@Override
public void onLoadError(DataSpec dataSpec, int dataType, int trackType, Format
trackFormat, int trackSelectionReason, Object trackSelectionData, long mediaStartTimeMs,
long mediaEndTimeMs, long elapsedRealtimeMs, long loadDurationMs, long bytesLoaded,
IOException error, boolean wasCanceled) {
}
@Override
public void onUpstreamDiscarded(int trackType, long mediaStartTimeMs, long
mediaEndTimeMs) {
}
@Override
public void onDownstreamFormatChanged(int trackType, Format trackFormat, int
trackSelectionReason, Object trackSelectionData, long mediaTimeMs) {
}
});
player.addListener(this);
player.prepare(hlsMediaSource);
simpleExoPlayerView.requestFocus();
player.setPlayWhenReady(true);
progressBar = (ProgressBar) findViewById(R.id.progressBar);
}
@Override
public void onTimelineChanged(Timeline timeline, Object manifest) {
}
@Override
public void onTracksChanged(TrackGroupArray trackGroups, TrackSelectionArray trackSelections) {
}
@Override
public void onLoadingChanged(boolean isLoading) {
}
@Override
public void onPlayerStateChanged(boolean playWhenReady, int playbackState) {
switch (playbackState) {
case Player.STATE_BUFFERING:
//You can use progress dialog to show user that video is preparing or buffering so
please wait
progressBar.setVisibility(View.VISIBLE);
break;
case Player.STATE_IDLE:
//idle state
break;
case Player.STATE_READY:
// dismiss your dialog here because our video is ready to play now
progressBar.setVisibility(View.GONE);
break;
case Player.STATE_ENDED:
// do your processing after ending of video
break;
}
}
@Override
public void onPlayerError(ExoPlaybackException error) {
AlertDialog.Builder adb = new AlertDialog.Builder(MainActivity.this);
adb.setTitle("Could not able to stream video");
adb.setMessage("It seems that something is going wrong.\nPlease try again.");
adb.setPositiveButton("OK", new DialogInterface.OnClickListener() {
@Override
public void onClick(DialogInterface dialog, int which) {
dialog.dismiss();
finish(); // take out user from this activity. you can skip this
}
});
AlertDialog ad = adb.create();
ad.show();
}
@Override
public void onPositionDiscontinuity() {
}
@Override
protected void onPause() {
super.onPause();
if (player != null) {
player.setPlayWhenReady(false); //to pause a video because now our video player is not in
focus
}
}
@Override
protected void onDestroy() {
super.onDestroy();
player.release();
}
}
使用 :
@Override
public void onTimelineChanged(Timeline timeline, Object manifest, int reason) {
}
@Override
public void onPositionDiscontinuity(int reason)
{
}