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TMED.03-Solution-EventListening #9

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45 changes: 41 additions & 4 deletions app/src/main/java/com/example/android/classicalmusicquiz/QuizActivity.java
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Original file line number Diff line number Diff line change
Expand Up @@ -25,30 +25,36 @@
import android.os.Handler;
import android.support.v4.content.ContextCompat;
import android.support.v7.app.AppCompatActivity;
import android.util.Log;
import android.view.View;
import android.widget.Button;
import android.widget.Toast;

import com.google.android.exoplayer2.DefaultLoadControl;
import com.google.android.exoplayer2.ExoPlaybackException;
import com.google.android.exoplayer2.ExoPlayer;
import com.google.android.exoplayer2.ExoPlayerFactory;
import com.google.android.exoplayer2.LoadControl;
import com.google.android.exoplayer2.SimpleExoPlayer;
import com.google.android.exoplayer2.Timeline;
import com.google.android.exoplayer2.extractor.DefaultExtractorsFactory;
import com.google.android.exoplayer2.source.ExtractorMediaSource;
import com.google.android.exoplayer2.source.MediaSource;
import com.google.android.exoplayer2.source.TrackGroupArray;
import com.google.android.exoplayer2.trackselection.DefaultTrackSelector;
import com.google.android.exoplayer2.trackselection.TrackSelectionArray;
import com.google.android.exoplayer2.trackselection.TrackSelector;
import com.google.android.exoplayer2.ui.SimpleExoPlayerView;
import com.google.android.exoplayer2.upstream.DefaultDataSourceFactory;
import com.google.android.exoplayer2.util.Util;

import java.util.ArrayList;

// TODO (1): Have this Activity implement ExoPlayer.EventListener and add the required methods.
public class QuizActivity extends AppCompatActivity implements View.OnClickListener {
public class QuizActivity extends AppCompatActivity implements View.OnClickListener, ExoPlayer.EventListener {

private static final int CORRECT_ANSWER_DELAY_MILLIS = 1000;
private static final String REMAINING_SONGS_KEY = "remaining_songs";
private static final String TAG = QuizActivity.class.getSimpleName();
private int[] mButtonIDs = {R.id.buttonA, R.id.buttonB, R.id.buttonC, R.id.buttonD};
private ArrayList<Integer> mRemainingSampleIDs;
private ArrayList<Integer> mQuestionSampleIDs;
Expand Down Expand Up @@ -149,7 +155,8 @@ private void initializePlayer(Uri mediaUri) {
mExoPlayer = ExoPlayerFactory.newSimpleInstance(this, trackSelector, loadControl);
mPlayerView.setPlayer(mExoPlayer);

// TODO (2): Set the ExoPlayer.EventListener to this activity
// Set the ExoPlayer.EventListener to this activity.
mExoPlayer.addListener(this);

// Prepare the MediaSource.
String userAgent = Util.getUserAgent(this, "ClassicalMusicQuiz");
Expand Down Expand Up @@ -260,5 +267,35 @@ protected void onDestroy() {
releasePlayer();
}

// TODO (3): Add conditional logging statements to the onPlayerStateChanged() method that log when ExoPlayer is playing or paused.

// ExoPlayer Event Listeners

@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) {
if((playbackState == ExoPlayer.STATE_READY) && playWhenReady){
Log.d(TAG, "onPlayerStateChanged: PLAYING");
} else if((playbackState == ExoPlayer.STATE_READY)){
Log.d(TAG, "onPlayerStateChanged: PAUSED");
}
}

@Override
public void onPlayerError(ExoPlaybackException error) {
}

@Override
public void onPositionDiscontinuity() {
}
}