MqttAndroidClient.publish()方法时空指针。

public void publish(String topic, String message) {

    try {

        InsideApplication.getSharedPreferences().getString(Const.ROOM_ID, "");

        String roomTopic = topic;

        if (!isNetworkConnected(InsideApplication.getApplication())) {

            LogUtils.d(TAG, "publish()--没有网");

            //在这里尝试过注销这mClient广播接收器 设置成null，

            //这个网络断开和连接非常快设置了睡眠 也无用

        }

if (mClient == null) {

            mClient = new MqttAndroidClient(InsideApplication.getApplication(), mUri,       DeviceUuidFactory.getLocalSerialHex());

            mClient.setCallback(this);

            //连接

        }

        mClient.publish(

                roomTopic,

                message.getBytes(),

                MQTTConfig.QOS,

                false,

                null,

                new ActionListener(

                        mContext,

                        Action.PUBLISH,

                        this));

    } catch (MqttSecurityException e) {

    } catch (MqttException e) {

    }

at org.eclipse.paho.android.service.MqttAndroidClient.publish(MqttAndroidClient.java:715)

at com.insideroom.mqtt.MQTTConnect.publish(MQTTConnect.java:112)

at com.insideroom.base.InsideApplication.publish(InsideApplication.java:93)

at com.insideroom.activity.VoiceNameActivity.pushNET(VoiceNameActivity.java:224)

at com.insideroom.activity.VoiceNameActivity.onCreate(VoiceNameActivity.java:110)

at android.app.Activity.performCreate(Activity.java:5131)

at android.app.Instrumentation.callActivityOnCreate(Instrumentation.java:1090)

at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2144)

... 11 more