我遇到了 java.lang.NullPointerException，但无法解决问题。
我必须使用 Android.net.rtp 进行简单的 VoIP 传输。
我编写了以下代码:
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$1.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$1.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)收到了错误。 此外，在 logcat 的前 2 行中，您可以看到我的调试显示 2 个对象“myAudioGroup”和“myAudioStream”不为 NULL。 有人可以帮忙吗？我几天来一直在解决这个错误，但没有成功...... 先感谢您 福斯托
最佳答案
首先，您必须在调用 myAudioStream.join(myAudioGroup); 之前先调用 myAudioStream.associate (InetAddress remoteAddress, int remotePort)
关于java - Android.net.rtp - AudioStream.join() - java.lang.NullPointerException，我们在Stack Overflow上找到一个类似的问题： https://stackoverflow.com/questions/30868875/