怎么用exoplayer玩m3u8，黑屏答案

【问题标题】：how to play m3u8 with exoplayer, the screen remains black怎么用exoplayer玩m3u8，黑屏
【发布时间】：2020-04-15 01:53:04
【问题描述】：

尝试使用 exoplayer v2.10.5 播放 m3u8 时变黑了，这让我添加或如何使用 exoplayer v2.10.5 和 gradle 3.5.3 播放 m3u 或者哪个版本的 exoplayer 可以使用 api 28 和 gradle 3.5.3

如果你能帮我调整代码或解释它，我最好从这个开始，这将是一个帮助，mp4 播放没有问题。

import android.net.Uri;
import android.os.Bundle;
import android.view.View;
import android.view.WindowManager;

import com.google.android.exoplayer2.ExoPlayerFactory;
import com.google.android.exoplayer2.SimpleExoPlayer;
import com.google.android.exoplayer2.source.MediaSource;
import com.google.android.exoplayer2.source.ProgressiveMediaSource;
import com.google.android.exoplayer2.ui.PlayerView;
import com.google.android.exoplayer2.upstream.DataSource;
import com.google.android.exoplayer2.upstream.DefaultDataSourceFactory;
import com.google.android.exoplayer2.util.Util;

import androidx.appcompat.app.AppCompatActivity;


/**
 * A fullscreen activity to play audio or video streams.
 */
public class PlayerActivity extends AppCompatActivity {

  private PlayerView playerView;
  private SimpleExoPlayer player;
  private boolean playWhenReady=true;
  private long playbackPosition=0;
  private int currentWindow=0;
  public String urlStream;

  @Override
  protected void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    setContentView(R.layout.activity_player);
    getWindow().addFlags(WindowManager.LayoutParams.FLAG_KEEP_SCREEN_ON);
    urlStream = this.getIntent().getStringExtra("URL");

    playerView = findViewById(R.id.video_view);
  }

  @Override
  public void onPause() {
    super.onPause();
    if (Util.SDK_INT < 24) {
      releasePlayer();
    }
  }

  @Override
  public void onStop() {
    super.onStop();
    if (Util.SDK_INT >= 24) {
      releasePlayer();
    }
  }

  private void releasePlayer() {
    if (player != null) {
      playWhenReady = player.getPlayWhenReady();
      playbackPosition = player.getCurrentPosition();
      currentWindow = player.getCurrentWindowIndex();
      player.release();
      player = null;
    }
  }

  @Override
  public void onStart() {
    super.onStart();
    if (Util.SDK_INT >= 24) {
      initializePlayer();
    }
  }

  @Override
  public void onResume() {
    super.onResume();
    hideSystemUi();
    if ((Util.SDK_INT < 24 || player == null)) {
      initializePlayer();
    }
  }

  @SuppressLint("InlinedApi")
  private void hideSystemUi() {
    playerView.setSystemUiVisibility(View.SYSTEM_UI_FLAG_LOW_PROFILE
            | View.SYSTEM_UI_FLAG_FULLSCREEN
            | View.SYSTEM_UI_FLAG_LAYOUT_STABLE
            | View.SYSTEM_UI_FLAG_IMMERSIVE_STICKY
            | View.SYSTEM_UI_FLAG_LAYOUT_HIDE_NAVIGATION
            | View.SYSTEM_UI_FLAG_HIDE_NAVIGATION);
  }

  private void initializePlayer() {


    player = ExoPlayerFactory.newSimpleInstance(this);
    playerView.setPlayer(player);

    Uri uri = Uri.parse(urlStream);
    MediaSource mediaSource = buildMediaSource(uri);

    player.setPlayWhenReady(playWhenReady);
    player.seekTo(currentWindow, playbackPosition);
    player.prepare(mediaSource, false, false);
  }

  private MediaSource buildMediaSource(Uri uri) {
    DataSource.Factory dataSourceFactory =
            new DefaultDataSourceFactory(this, "exoplayer-codelab");
    return new ProgressiveMediaSource.Factory(dataSourceFactory)
            .createMediaSource(uri);
  }


} ```

【问题讨论】：

检查是否添加了jls格式的依赖。实施 'com.google.android.exoplayer:exoplayer-hls:2.12.0'

标签： android m3u8 exoplayer2.x

【解决方案1】：

播放m3u8文件需要使用HLS媒体源。

使用这个

private MediaSource buildMediaSource(Uri uri) {
    DataSource.Factory dataSourceFactory = new DefaultDataSourceFactory(this, "exoplayer-codelab");
    return new HlsMediaSource.Factory(dataSourceFactory).createMediaSource(uri);
}

而不是这个

private MediaSource buildMediaSource(Uri uri) {
    DataSource.Factory dataSourceFactory = new DefaultDataSourceFactory(this, "exoplayer-codelab");
    return new ProgressiveMediaSource.Factory(dataSourceFactory).createMediaSource(uri);
}

【讨论】：