java.lang.NullPointerException: Attempt to invoke virtual method 'void 、Handler.removeMessages(int)' on a null object reference

onDestory进行释放Handler时，需要判断null

if(null != mHandler) {

mHandler.removeMessages(MSG_CHANGE_TEXT_COLOR);

mHandler.removeMessages(MSG_JUMP_TO_SUCCESS_PAGE);

mHandler.removeMessages(MSG_PLAY_LITTLE_PEOPLE_ANIMATION);

mHandler.removeMessages(MSG_PLAY_WRONG_ANIMATION);

mHandler.removeMessages(MSG_SPEAK_BUTTON_STATE_CHANGED);

mHandler = null;

DebugLog.d(TAG, "release Handler success");

}

文章来自：http://www.cnblogs.com/ErLiangCode/p/4781366.html