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copied!<p>Attempting to investigate this myself, in case an expert on the subject isn't around:</p> <p>The NullPointerException stack trace is printed by <code>setEngineByPackageName()</code> itself in the catch handler for this try clause:</p> <pre><code>try { result = mITts.setEngineByPackageName(enginePackageName); if (result == TextToSpeech.SUCCESS){ mCachedParams[Engine.PARAM_POSITION_ENGINE + 1] = enginePackageName; } } </code></pre> <p>Which suggests that either of the following is null:</p> <ol> <li>mITts</li> <li>mCachedParams</li> </ol> <p>mCachedParams is unlikely to be the null one because it is initialized in the constructor. So this leaves us with <code>mITts</code>:</p> <p>If I examine <code>TextToSpeech.initTts()</code> I can easily spot 2 points in which mITts can remain null:</p> <ol> <li>onServiceConnected()</li> <li>onServiceDisconnected()</li> </ol> <p>But why this is happening only on the 2.3.4 device? This is still a mystery.</p> <p>Possible clue: The method <code>TextToSpeech.initTts()</code> ends with the following comment:</p> <pre><code>mContext.bindService(intent, mServiceConnection, Context.BIND_AUTO_CREATE); // TODO handle case where the binding works (should always work) but // the plugin fails </code></pre> <p>Which may explain why I receive a barrage of <code>onInit()</code>s ("initTts() successfully bound to service"): Binding always works, but since the package is not installed, "the plugin fails".</p> <p>The question now is how to stop this endless loop...</p>

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