An example of using ExoPlayer from scratch

ExoPlayerExample.java

package org.cmdr2.exoplayerbridge;

import android.app.Activity;
import android.media.AudioManager;
import android.media.MediaCodec;
import android.net.Uri;
import android.util.Log;
import android.view.Surface;
import android.view.SurfaceView;

import com.google.android.exoplayer.ExoPlayer;
import com.google.android.exoplayer.MediaCodecAudioTrackRenderer;
import com.google.android.exoplayer.MediaCodecSelector;
import com.google.android.exoplayer.MediaCodecVideoTrackRenderer;
import com.google.android.exoplayer.SampleSource;
import com.google.android.exoplayer.TrackRenderer;
import com.google.android.exoplayer.audio.AudioCapabilities;
import com.google.android.exoplayer.extractor.ExtractorSampleSource;
import com.google.android.exoplayer.upstream.Allocator;
import com.google.android.exoplayer.upstream.DataSource;
import com.google.android.exoplayer.upstream.DefaultAllocator;
import com.google.android.exoplayer.upstream.DefaultUriDataSource;

public class ExoPlayerExample {
    /* globals */
    private static final int BUFFER_SEGMENT_SIZE = 64 * 1024;
    private static final int BUFFER_SEGMENT_COUNT = 256;


    /* scratchpad */
    private Activity activity;
    private Surface surface;
    private String audioUrl;
    private String videoUrl;
    private ExoPlayer player;


    public ExoPlayerExample(Activity activity) {
        this.activity = activity;
    }

    public void setSurface(Surface surface) {
        this.surface = surface;
    }

    public void setAudioUrl(String audioUrl) {
        this.audioUrl = audioUrl;
    }

    public void setVideoUrl(String videoUrl) {
        this.videoUrl = videoUrl;
    }

    public void init() {
        activity.runOnUiThread(new Runnable() {
            @Override
            public void run() {
                doInit();
            }
        });
    }

    public void seekTo(long pos) {
        player.seekTo(pos);
    }

    public long getCurrentPosition() {
        return player.getCurrentPosition();
    }

    private void doInit() {
        player = ExoPlayer.Factory.newInstance(2, 1000, 5000);

        Allocator allocator = new DefaultAllocator(BUFFER_SEGMENT_SIZE);

        DataSource audioDataSource = new DefaultUriDataSource(activity.getApplicationContext(), "Demo UserAgent");
        DataSource videoDataSource = new DefaultUriDataSource(activity.getApplicationContext(), "Demo UserAgent");

        Uri audioUri = Uri.parse(audioUrl);
        Uri videoUri = Uri.parse(videoUrl);
        SampleSource audioSampleSource = new ExtractorSampleSource(audioUri, audioDataSource,
                allocator, BUFFER_SEGMENT_COUNT * BUFFER_SEGMENT_SIZE, null, null, 0);
        SampleSource videoSampleSource = new ExtractorSampleSource(videoUri, videoDataSource,
                allocator, BUFFER_SEGMENT_COUNT * BUFFER_SEGMENT_SIZE, null, null, 0);

        TrackRenderer audioTrackRenderer = new MediaCodecAudioTrackRenderer(audioSampleSource,
                MediaCodecSelector.DEFAULT, null, true, null, null,
                AudioCapabilities.getCapabilities(activity.getApplicationContext()), AudioManager.STREAM_MUSIC);

        final TrackRenderer videoTrackRenderer = new MediaCodecVideoTrackRenderer(activity.getApplicationContext(),
                videoSampleSource, MediaCodecSelector.DEFAULT, MediaCodec.VIDEO_SCALING_MODE_SCALE_TO_FIT, 5000,
                null, null, 50);

        player.prepare(videoTrackRenderer, audioTrackRenderer);
        player.sendMessage(videoTrackRenderer, MediaCodecVideoTrackRenderer.MSG_SET_SURFACE, surface);
        player.setPlayWhenReady(true);
    }

}