语音合成初始化java.lang.NullPointerException

java.lang.NullPointerException: Attempt to invoke interface method 'void com.baidu.tts.aop.tts.ITts.setMode(com.baidu.tts.f.m)' on a null object reference
2    at com.baidu.tts.a.b.a.a(SpeechSynthesizerAdapter.java:86)
3    at com.baidu.tts.client.SpeechSynthesizer.initTts(SpeechSynthesizer.java:204)
4    at com.mytest.core.voice.control.MySyntherizer.a(MySyntherizer.java:91)
5    at com.mytest.core.voice.control.NonBlockSyntherizer$1.handleMessage(NonBlockSyntherizer.java:42)
6    at android.os.Handler.dispatchMessage(Handler.java:106)
7    at android.os.Looper.loop(Looper.java:192)
8    at android.os.HandlerThread.run(HandlerThread.java:65)