为什么会TextToSpeech.getLanguage（）* *有时返回NULL？ [英] Why would TextToSpeech.getLanguage() *sometimes* return null?

问题描述

在我的应用程序，我称之为<一个href=\"http://developer.android.com/reference/android/speech/tts/TextToSpeech.html#getLanguage%28%29\">TextToSpeech.getLanguage()以及实例化文字转语音（根据LogCat中〜800毫秒），但之后的有时（不总是）返回null，尽管在系统的文字转语音设置正确设置语言：

In my app, I call TextToSpeech.getLanguage() well after instantiating TextToSpeech (~800ms according to LogCat), yet it sometimes (not always) return null, despite the language set properly in the system's TextToSpeech settings:

System Settings > Language & input > 
  Text-to-speech output > Google Text-to-speech > English (United Kingdom)

这只是发生在果冻豆（Android的 4.1.1 ）。
它不会在Android 2.2的发生。

This only happens in Jelly Bean (Android 4.1.1). It doesn't happen in Android 2.2.

这是一个已知的Andr​​oid错误？
还是我做错了什么？

Is this a known Android bug? Or am I doing something wrong?

我实例，顺便说一句，文字转语音在我的应用程序与主要活动：

I instantiate, BTW, TextToSpeech in my app's main activity with:

new TextToSpeech(this, this); 

和两个实例，并调用<一个href=\"http://developer.android.com/reference/android/speech/tts/TextToSpeech.html#getLanguage%28%29\">TextToSpeech.getLanguage()在同一个线程（因此呼叫顺序保证的）制成。

And both instantiation and the call to TextToSpeech.getLanguage() are made in the same thread (thus order of calls is guaranteed).

推荐答案

您必须调用使用getLanguage（）中的OnInit（），有时需要对OnInit的几秒钟（）被调用。

You have to call getLanguage () in onInit (), sometimes it takes a few second for onInit () to be called.

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