Android.net.rtp - AudioStream.join() - java.lang.NullPointerException

Question

我得到了一个java.lang.NullPointerException，我无法解决问题。

我必须使用 Android.net.rtp 进行简单的 VoIP 传输。

我写了下面的代码：

private static final AudioCodec myAudioCodec_COSTANTE = AudioCodec.PCMU ; 
private static final int myAudioGroupTX_COSTANTE = AudioGroup.MODE_NORMAL ; 
private static final int myAudioGroupRX_COSTANTE = AudioGroup.MODE_NORMAL ;
private static final int myRtpStreamTX_COSTANTE = RtpStream.MODE_SEND_ONLY ;
private static final int myRtpStreamRX_COSTANTE = RtpStream.MODE_RECEIVE_ONLY ; 
private static final int myAudioManagerTX_COSTANTE = AudioManager.MODE_IN_COMMUNICATION;
private static final int myAudioManagerRX_COSTANTE = AudioManager.MODE_IN_COMMUNICATION; 


myAudioStream = new AudioStream(localClientIP);
myAudioGroup = new AudioGroup();
myAudioGroup.setMode(myAudioGroupTX_COSTANTE);
myAudioStream.join(null); 
myAudioStream.setCodec(myAudioCodec_COSTANTE);
myAudioStream.setMode(myRtpStreamTX_COSTANTE);

Log.w(tag, "FAU dentro startGroupVoIP_TX(); myAudioGroup: " + myAudioGroup);  //My Debug
Log.w(tag, "FAU dentro startGroupVoIP_TX(); myAudioStream: " + myAudioStream);  //My Debug

myAudioStream.join(myAudioGroup); //Row 124

我收到以下错误 (android studio logcat):

06-16 14:58:52.855    6690-6726/com.fpricoco.iptetraclient W/Voip_Manager﹕ FAU dentro startGroupVoIP_TX(); myAudioGroup: android.net.rtp.AudioGroup@4240d718
06-16 14:58:52.855    6690-6726/com.fpricoco.iptetraclient W/Voip_Manager﹕ FAU dentro startGroupVoIP_TX(); myAudioStream: android.net.rtp.AudioStream@4240d3f0
06-16 14:58:52.865    6690-6726/com.fpricoco.iptetraclient D/Voip_Manager﹕ Eccezione sul try del nuovo Thread di startGroupVoIP_TX(); exception: java.lang.NullPointerException
    java.lang.IllegalStateException: java.lang.NullPointerException
            at android.net.rtp.AudioGroup.add(AudioGroup.java:156)
            at android.net.rtp.AudioStream.join(AudioStream.java:97)
            at com.fpricoco.iptetraclient.VoIP.Voip_Manager.run(Voip_Manager.java:124)
            at java.lang.Thread.run(Thread.java:856)
     Caused by: java.lang.NullPointerException
            at android.net.rtp.AudioGroup.add(AudioGroup.java:149)
            at android.net.rtp.AudioStream.join(AudioStream.java:97)
            at com.fpricoco.iptetraclient.VoIP.Voip_Manager.run(Voip_Manager.java:124)
            at java.lang.Thread.run(Thread.java:856)

如您所见，我在代码的最后一行（第 124 行）遇到了错误。此外，在 logcat 的前两行中，您可以看到我的调试显示 "myAudioGroup" 和 "myAudioStream" 这两个对象不是 NULL。有人可以帮忙吗？几天来我一直在处理这个错误，但没有成功...... 先感谢您福斯托

Answer 1

首先你必须在调用 myAudioStream.join(myAudioGroup);

之前调用 myAudioStream.associate (InetAddress remoteAddress, int remotePort)

Android.net.rtp - AudioStream.join() - java.lang.NullPointerException

Android.net.rtp - AudioStream.join() - java.lang.NullPointerException

java

android

nullpointerexception

voip

rtp