c# - 无法在 Android 9,10 Xamarin 上获得媒体播放器声音

Question

我在 android 8 及以下版本上使用此代码，但在 Android 9+ 版本上它不起作用。

MediaPlayer player3;
        player3 = new MediaPlayer();
        player3.SetDataSource(url);
        player3.SetAudioStreamType(Stream.Music);
        player3.Completion += mediaPlayer_Completion;
        player3.PrepareAsync();
        player3.Start();

编辑:我正在尝试重现音频流链接。玩家什么都不做。相同的代码在其他 Android 版本上运行良好。

Answer 1

After Android 9 (API level 28), cleartext support is disabled by default.

检查 https://koz.io/android-m-and-the-war-on-cleartext-traffic/

解决方案一

创建文件network_security_config.xml

<?xml version="1.0" encoding="utf-8"?>
<network-security-config>
    <domain-config cleartextTrafficPermitted="true">
        <domain includeSubdomains="true">Your video URL(ex: 127.0.0.1)</domain>
    </domain-config>
</network-security-config>

AndroidManifest.xml -

<?xml version="1.0" encoding="utf-8"?>
<manifest ...>
    <uses-permission android:name="android.permission.INTERNET" />
    <application
        ...
        android:networkSecurityConfig="@xml/network_security_config"
        ...>
        ...
    </application>
</manifest>

解决方案2

Android:usesCleartextTraffic Doc

AndroidManifest.xml -

<?xml version="1.0" encoding="utf-8"?>
<manifest ...>
    <uses-permission android:name="android.permission.INTERNET" />
    <application
        ...
        android:usesCleartextTraffic="true"
        ...>
        ...
    </application>
</manifest>