onDataChecked may be called *after* onInitialized is called, in which case mVoices will be null; set the voice count in onDataChecked to avoid problems

android/src/com/googlecode/eyesfree/espeak/eSpeakActivity.java

 import android.os.Handler;
 import android.os.Message;
 import android.speech.tts.TextToSpeech;
+import android.util.Log;
 import android.view.View;
 import android.widget.TextView;
 
     private static final int DIALOG_DOWNLOAD_FAILED = 2;
     private static final int DIALOG_ERROR = 3;
 
+	private static final String TAG = "eSpeakActivity";
+
     private enum State {
         LOADING,
         FAILURE,
     private void onDataChecked(int resultCode, Intent data) {
         if (resultCode != TextToSpeech.Engine.CHECK_VOICE_DATA_PASS) {
             if (mDownloadedVoiceData) {
+            	Log.e(TAG, "Voice data check failed (error code: " + resultCode + ").");
                 setState(State.FAILURE);
                 showDialog(DIALOG_ERROR);
             } else {
 
         mVoices = data.getStringArrayListExtra(TextToSpeech.Engine.EXTRA_AVAILABLE_VOICES);
 
+        if (mVoices == null) {
+        	Log.e(TAG, "Data check failed -- voices is null.");
+            setState(State.FAILURE);
+            showDialog(DIALOG_ERROR);
+            return;
+        }
+
         initializeEngine();
+
+        final TextView availableVoices = (TextView) findViewById(R.id.availableVoices);
+        availableVoices.setText(Integer.toString(mVoices.size()));
     }
 
     /**
      */
     private void onDataDownloaded(int resultCode) {
         if (resultCode != RESULT_OK) {
+        	Log.e(TAG, "Voice data download failed.");
             setState(State.FAILURE);
             showDialog(DIALOG_DOWNLOAD_FAILED);
             return;
             return;
         }
 
-        if (status == TextToSpeech.ERROR || mVoices == null) {
+        if (status == TextToSpeech.ERROR) {
+        	Log.e(TAG, "Initialization failed (status: " + status + ").");
             setState(State.FAILURE);
             showDialog(DIALOG_ERROR);
             return;
         final TextView currentLocale = (TextView) findViewById(R.id.currentLocale);
         currentLocale.setText(mTts.getLanguage().getDisplayName());
 
-        final TextView availableVoices = (TextView) findViewById(R.id.availableVoices);
-        availableVoices.setText(Integer.toString(mVoices.size()));
-
         findViewById(R.id.updateVoices).setOnClickListener(mOnClickListener);
         findViewById(R.id.ttsSettings).setOnClickListener(mOnClickListener);
         findViewById(R.id.engineSettings).setOnClickListener(mOnClickListener);