Problem with audio stream on android

Question

My shorthand code is this:

MediaPlayer mediaPlayer = new MediaPlayer();
mediaPlayer.setAudioStreamType(AudioManager.STREAM_MUSIC);

mediaPlayer.setDataSource("http://stm43.srvstm.com:8474/;");

mediaPlayer.prepareAsync();

mediaPlayer.setOnPreparedListener(new MediaPlayer.OnPreparedListener() {
            public void onPrepared(MediaPlayer mp) {
                mp.start();
            }
        });

mediaPlayer.setOnErrorListener(new MediaPlayer.OnErrorListener() {
            public boolean onError(MediaPlayer mp, int what, int extra) {
                mp.reset();
                Log.i("informacao", "erro "+ what + " -- " + extra);
                return false;
            }
        });

The logcat is returning me the following message:

? I/information: error 1 -- -2147483648

According to the Mediaplayer documentation the numbering error 1 is MEDIA_ERROR_UNKNOWN which is described as "Unspecified media player error." , the test that presented this error was done on an emulator with android 8.1 (Oreo), in versions 4.4.2 and 6.0 works normally, I would like to understand why it does not work in version 8.1 and what are the alternatives to make this stream work in the latest versions of android.

If the link is accessed this way http://stm43.srvstm.com:8474/Listen.pls in a browser, a file is downloaded and when opening the file . pls the stream works on the computer normally.

Information about the stream: (HE-AAC@ 64 kbps, 44.1 kHz)

Answer 1

The problem was generated due to a lack of attention, I was thinking that the problem was in this code and I forgot the context that it was inserted. I realized that in my project was implemented the network security configuration and that in my scenario ended up "hindering" the Mediaplayer to perform its function, to be able to realize this after testing the coding in a project without any configuration, started from scratch.

On my Androidmanifest.xml I had the following:

...
 <application
        android:networkSecurityConfig="@xml/network_security_config"
        android:allowBackup="true"
        android:icon="@mipmap/ic_launcher"
...

and in my network_security_config.xml

<?xml version="1.0" encoding="utf-8"?>
<network-security-config>
    <domain-config cleartextTrafficPermitted="false">
        <domain includeSubdomains="true">stm43.srvstm.com</domain>
    </domain-config>
</network-security-config>

The documentation explains that this configuration I used serves to ensure that all connections with Secure.example.com (in my case stm43.srvstm.com) are always performed by HTTPS to protect confidential traffic from hostile networks. Trying to understand a little more, within the explanation of the method:

NetworkSecurityPolicy.isCleartextTrafficPermitted()

I found the following, "When unencrypted text network traffic is not allowed, the platform components (e.g., HTTP stacks and FTP Downloadmanager, Mediaplayer) refuse requests for this process to use unencrypted text traffic. Third-party libraries are strongly encouraged to honor this setting as well." So some players I tested didn’t work either.

And the reason the app is only working with versions inferior to android 6.0 (API 23), is that these "trust the repository of Cas added by the user by default", already in the higher versions android was taking into account my network security configuration (network_security_config.xml).

Sources:

https://developer.android.com/training/articles/security-config?hl=pt-br

https://developer.android.com/reference/android/security/NetworkSecurityPolicy.html?hl=pt-br#isCleartextTrafficPermitted()

Answer 2

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