如何理解mqtt的mqttcallback类

如何理解mqtt的mqttcallback类

MQTT连接建立的代码(SSL方式)

[java] view plain copy
public static void connect(Driver driver) {
ServerConfig serverConfig = UserModule.Instance.getServerConfig();
MqttConnectOptions conOpt = new MqttConnectOptions();
try {
SSLContext sslContext;
KeyStore ts = KeyStore.getInstance("BKS");
ts.load(context.getResources().openRawResource(R.raw.test_cert),
"123456".toCharArray());
TrustManagerFactory tmf = TrustManagerFactory.getInstance("X509");
tmf.init(ts);
TrustManager[] tm = tmf.getTrustManagers();
sslContext = SSLContext.getInstance("TLS");
sslContext.init(null, tm, null);

SocketFactory factory = sslContext.getSocketFactory();
conOpt.setSocketFactory(factory);
} catch (Exception e) {
e.printStackTrace();
}

[java] view plain copy
//paho库得
Iterator> it = Connections
.getInstance(context).getConnections().entrySet().iterator();
while (it.hasNext()) {
MqttClientAndroidService detectClient = it.next().getValue()
.getClient();
try {
detectClient.disconnect();
} catch (MqttException e) {
e.printStackTrace();
}
it.remove();
}

不明白啊 = =！

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