如何解决HttpURLConnection上的空点异常？

Question

我正在开发一个Android应用程序，使用ExoPlayer用于视频播放，Glide用于图像显示，以及用于文件下载的下载库，并且它们都具有与HttpURLConnection相关的NullPointerExctive，我确信使用的链接是可用的。

神奇的是，我只是按照这些库的官方留档中描述的方法正常加载数据，这种错误时有发生，三个库可能不会同时抛出NullPointerExctive，我甚至不知道如何重现这个问题。

这是ExoPlayer引发的错误，导致无法加载视频：

E/LoadTask: Unexpected exception loading stream
      java.lang.NullPointerException: wrapped.getHeaderField(key) must not be null
        at com.android.tools.appinspection.network.httpurl.TrackedHttpURLConnection.getHeaderField(TrackedHttpURLConnection.kt:317)
        at com.android.tools.appinspection.network.httpurl.HttpsURLConnectionWrapper.getHeaderField(HttpsURLConnectionWrapper.kt:182)
        at com.google.android.exoplayer2.upstream.DefaultHttpDataSource.isCompressed(DefaultHttpDataSource.java:829)
        at com.google.android.exoplayer2.upstream.DefaultHttpDataSource.open(DefaultHttpDataSource.java:413)
        at com.google.android.exoplayer2.upstream.StatsDataSource.open(StatsDataSource.java:84)
        at com.google.android.exoplayer2.source.ProgressiveMediaPeriod$ExtractingLoadable.load(ProgressiveMediaPeriod.java:1009)
        at com.google.android.exoplayer2.upstream.Loader$LoadTask.run(Loader.java:412)
        at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1167)
        at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:641)
        at java.lang.Thread.run(Thread.java:923)

代码的视频播放部分如下所示：

            val factory = ProgressiveMediaSource.Factory(
                DefaultHttpDataSource.Factory()
            )
            val mediaSource = arrayListOf<MediaSource>(
                factory.createMediaSource(MediaItem.fromUri(video.base_url)),
                factory.createMediaSource(MediaItem.fromUri(audio.base_url))
            )
            val media = MergingMediaSource(true, *mediaSource.toTypedArray())
            ViewModel.getPlayer()?.let { player ->
                player.setMediaSource(media)
                player.prepare()
            }

下面是我使用的所有依赖和插件：

...
plugins {
    val androidVer = "7.1.2"
    id("com.android.application") version androidVer apply false
    id("com.android.library") version androidVer apply false

    val kotlinVer = "1.6.20-M1"
    id("org.jetbrains.kotlin.android") version kotlinVer apply false
    id("org.jetbrains.kotlin.plugin.parcelize") version kotlinVer apply false
    id("org.jetbrains.kotlin.kapt") version kotlinVer apply false
}
...
dependencies {
    implementation("androidx.test.ext:junit-ktx:1.1.3")
    testImplementation("junit:junit:4.13.2")
    androidTestImplementation("androidx.test.ext:junit:1.1.3")
    androidTestImplementation("androidx.test.espresso:espresso-core:3.4.0")
    androidTestImplementation("androidx.test:runner:1.4.0")
    androidTestImplementation("androidx.test:rules:1.4.0")

    implementation("androidx.core:core-ktx:1.7.0")
    implementation("androidx.appcompat:appcompat:1.4.1")
    implementation("com.google.android.material:material:1.5.0")
    implementation("androidx.constraintlayout:constraintlayout:2.1.3")
    implementation("androidx.swiperefreshlayout:swiperefreshlayout:1.1.0")
    implementation("androidx.navigation:navigation-fragment-ktx:2.4.1")

    implementation("com.github.zhpanvip.BannerViewPager:bannerview:2.6.6")
    implementation("com.squareup.okhttp3:okhttp:5.0.0-alpha.5")
    implementation("com.yanzhenjie:sofia:1.0.5")
    implementation("com.github.SGPublic:Blur-Fix-AndroidX:1.1.2")
    implementation("com.github.SGPublic:MultiWaveHeaderX:1.0.0")
    implementation("com.github.li-xiaojun:XPopup:2.7.5")
    implementation("com.google.zxing:core:3.4.1")
    implementation("com.google.code.gson:gson:2.9.0")

    val glideVer = "4.13.1"
    implementation("com.github.bumptech.glide:glide:$glideVer")
    annotationProcessor("com.github.bumptech.glide:compiler:$glideVer")
    kapt("com.github.bumptech.glide:compiler:$glideVer")
    implementation("jp.wasabeef:glide-transformations:4.3.0")

    val exoVer = "2.17.0"
    implementation("com.google.android.exoplayer:exoplayer-core:$exoVer")
    implementation("com.google.android.exoplayer:exoplayer-dash:$exoVer")
    implementation("com.google.android.exoplayer:exoplayer-ui:$exoVer")

    val roomVer = "2.4.2"
    implementation("androidx.room:room-runtime:$roomVer")
    implementation("androidx.room:room-ktx:$roomVer")
    annotationProcessor("androidx.room:room-compiler:$roomVer")
    kapt("androidx.room:room-compiler:$roomVer")
    testImplementation("androidx.room:room-testing:$roomVer")

    val ariaVer = "3.8.12"
    implementation("com.arialyy.aria:core:$ariaVer")
    annotationProcessor("com.arialyy.aria:compiler:$ariaVer")
    kapt("com.arialyy.aria:compiler:$ariaVer")
}
...

我尝试过失效和重启，甚至完全卸载和重新安装了Android Studio，但问题仍然无法解决，那么问题是什么？

Answer 1

亲爱的使用这个库来播放youtube视频，它令人惊叹，易于使用和管理，这是在应用程序中播放youtube视频的最佳方式

    implementation 'com.pierfrancescosoffritti.androidyoutubeplayer:chromecast-sender:0.23'

清单（如果你想使用全屏视频播放）

  <activity
   android:name="com.pksofterltd.videoislamapp.Activities.LiveVideo"
   android:exported="true"
       android:configChanges="keyboard|keyboardHidden|orientation|screenSize|screenLayout|smallestScreenSize|uiMode">

        </activity>

XML

<com.pierfrancescosoffritti.androidyoutubeplayer.core.player.views.YouTubePlayerView
        android:id="@+id/youtube_player_view"
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        app:showYouTubeButton="false" /

JAVA

  YouTubePlayerView youTubePlayerView;
    YouTubePlayer youTubePlr;

 @Override
    protected void onCreate(Bundle savedInstanceState) {
        youTubePlayerView = findViewById(R.id.youtube_player_view);

// link of video https://www.youtube.com/watch?v=HoJtAI0B-Bw
// you just use video ID insted on complete URL .video id you find at the end of url
// here is video ID is "HoJtAI0B-Bw" 

        play("HoJtAI0B-Bw");


}
public void play(String url){
        getLifecycle().addObserver(youTubePlayerView);


        youTubePlayerView.addFullScreenListener(new YouTubePlayerFullScreenListener() {
            @Override
            public void onYouTubePlayerEnterFullScreen() {
                setRequestedOrientation(ActivityInfo.SCREEN_ORIENTATION_LANDSCAPE);
                getWindow().getDecorView().setSystemUiVisibility(View.SYSTEM_UI_FLAG_FULLSCREEN);
            }

            @Override
            public void onYouTubePlayerExitFullScreen() {
                setRequestedOrientation(ActivityInfo.SCREEN_ORIENTATION_PORTRAIT);
                getWindow().getDecorView().setSystemUiVisibility(View.SYSTEM_UI_FLAG_VISIBLE);

            }
        });
        youTubePlayerView.addYouTubePlayerListener(new AbstractYouTubePlayerListener() {
            @Override
            public void onReady(@NonNull YouTubePlayer youTubePlayer) {
                youTubePlr =youTubePlayer;
                
                    youTubePlr.loadVideo(url,0);
                





            }
        });
    }