115     private ToneGenerator mToneGenerator;  field in EmergencyDialer
233             if (mToneGenerator == null) {  in onCreate()
235                     mToneGenerator = new ToneGenerator(DIAL_TONE_STREAM_TYPE, TONE_RELATIVE_VOLUME);  in onCreate()
238                     mToneGenerator = null;  in onCreate()
254             if (mToneGenerator != null) {  in onDestroy()
255                 mToneGenerator.release();  in onDestroy()
256                 mToneGenerator = null;  in onDestroy()
477             if (mToneGenerator == null) {  in onResume()
479                     mToneGenerator = new ToneGenerator(AudioManager.STREAM_DTMF,  in onResume()
483                     mToneGenerator = null;  in onResume()
506             if (mToneGenerator != null) {  in onPause()
507                 mToneGenerator.release();  in onPause()
508                 mToneGenerator = null;  in onPause()
567             if (mToneGenerator == null) {  in playTone()
573             mToneGenerator.startTone(tone, TONE_LENGTH_MS);  in playTone()