Basic ExoPlayer in android studio

Here we will use simple Exoplayer to play any video in android application. Steps are following:-
1. Take new project in android studio and open activity_main.xml and write following:-
activity_main.xml :-

<?xml version="1.0" encoding="utf-8"?><android.support.constraint.ConstraintLayout 

xmlns:android="http://schemas.android.com/apk/res/android"    

xmlns:app="http://schemas.android.com/apk/res-auto"    

xmlns:tools="http://schemas.android.com/tools"    

android:layout_width="match_parent"    

android:layout_height="match_parent"    

tools:context=".MainActivity">   

<TextView        

android:id="@+id/tvWatchVideo"        

android:layout_width="wrap_content"        

android:layout_height="wrap_content"        

android:text="Watch Video"        

app:layout_constraintBottom_toBottomOf="parent"        

app:layout_constraintLeft_toLeftOf="parent"        

app:layout_constraintRight_toRightOf="parent"        

app:layout_constraintTop_toTopOf="parent" />
</android.support.constraint.ConstraintLayout>

2. Open MainActivity.java and write following code:-

public class MainActivity extends AppCompatActivity {
    private TextView tvWatchVideo;

    @Override    

       protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);
        tvWatchVideo = (TextView)findViewById(R.id.tvWatchVideo);
        tvWatchVideo.setOnClickListener(new View.OnClickListener() {
            @Override            

public void onClick(View view) {
                startActivity(new Intent(MainActivity.this,VideoPlayActivity.class));
            }
        });
    }
}

3. Now to play video we will add Exoplayer library in gradle like following:-

dependencies {
    // exo player    

implementation 'com.google.android.exoplayer:exoplayer:2.7.0'

}
4. create new layout name of videoplay_activity.xml:-

<?xml version="1.0" encoding="utf-8"?>

<RelativeLayout 

xmlns:android="http://schemas.android.com/apk/res/android"    

android:layout_width="match_parent"    

android:layout_height="match_parent">
    <com.google.android.exoplayer2.ui.SimpleExoPlayerView        

android:layout_width="match_parent"        

android:id="@+id/exoPlayerview"        

android:layout_height="match_parent">
    </com.google.android.exoplayer2.ui.SimpleExoPlayerView>
</RelativeLayout>

5. Now to play video we will create new class with name of VideoPlayActivity:-

public class VideoPlayActivity extends AppCompatActivity {
    String videoURL = "http://blueappsoftware.in/layout_design_android_blog.mp4";
    private SimpleExoPlayerView simpleExoPlayerView;
    private SimpleExoPlayer exoPlayer;
    @Override    

protected void onCreate(@Nullable Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.videoplay_activity);
        exoPlayerControl();
    }

    private void exoPlayerControl() {
        simpleExoPlayerView = (SimpleExoPlayerView)findViewById(R.id.exoPlayerview);
        try {
            BandwidthMeter bandwidthMeter = new DefaultBandwidthMeter();
            TrackSelector trackSelector = new DefaultTrackSelector(new AdaptiveTrackSelection.Factory(bandwidthMeter));
            exoPlayer = ExoPlayerFactory.newSimpleInstance(this, trackSelector);
            Uri videoUrl = Uri.parse(videoURL);
            DefaultHttpDataSourceFactory defaultHttpDataSource = new DefaultHttpDataSourceFactory("exoplayer");
            ExtractorsFactory factory = new DefaultExtractorsFactory();
            MediaSource mediaSource = new ExtractorMediaSource(videoUrl,defaultHttpDataSource,factory,null,null);
            simpleExoPlayerView.setPlayer(exoPlayer);
            exoPlayer.prepare(mediaSource);
            exoPlayer.setPlayWhenReady(true);

        }catch (Exception e){
            e.printStackTrace();
        }

    }
}

6.Output will be like this:-