{"id":22550,"date":"2023-12-05T11:25:47","date_gmt":"2023-12-05T03:25:47","guid":{"rendered":"https:\/\/app.applebyme.cn\/cloud\/?p=22550"},"modified":"2023-12-05T11:25:47","modified_gmt":"2023-12-05T03:25:47","slug":"mqtt%e5%ae%89%e5%8d%93app%e5%bc%80%e5%8f%91%e9%9c%80%e8%a6%81%e6%b3%a8%e6%84%8f%e5%93%aa%e4%ba%9b%e4%ba%8b%e9%a1%b9%ef%bc%9f","status":"publish","type":"post","link":"https:\/\/app.applebyme.cn\/cloud\/appkaifa\/22550.html","title":{"rendered":"mqtt\u5b89\u5353app\u5f00\u53d1\u9700\u8981\u6ce8\u610f\u54ea\u4e9b\u4e8b\u9879\uff1f"},"content":{"rendered":"

MQTT\uff08Message Queuing Telemetry Transport\uff09\u662f\u4e00\u4e2a\u8f7b\u91cf\u7ea7\u7684\u6d88\u606f\u4f20\u9012\u534f\u8bae\uff0c\u5b83\u9002\u7528\u4e8e\u5404\u79cd\u7269\u8054\u7f51\u8bbe\u5907\u548c\u5e94\u7528\u7a0b\u5e8f\u4e4b\u95f4\u7684\u901a\u4fe1\u3002<\/p>\n

<\/figure>\n<\/p>\n

Android \u5e94\u7528\u7a0b\u5e8f\u53ef\u4ee5\u901a\u8fc7 MQTT \u534f\u8bae\u4e0e\u670d\u52a1\u5668\u8fdb\u884c\u901a\u4fe1\uff0c\u8fd9\u5bf9\u4e8e\u9700\u8981\u5b9e\u65f6\u901a\u4fe1\u548c\u8bbe\u5907\u76d1\u63a7\u7684\u5e94\u7528\u7a0b\u5e8f\u975e\u5e38\u6709\u7528\u3002<\/p>\n

MQTT \u534f\u8bae\u4f7f\u7528\u53d1\u5e03\/\u8ba2\u9605\u6a21\u5f0f\uff0c\u5176\u4e2d\u53d1\u5e03\u8005\u53d1\u5e03\u6d88\u606f\u5e76\u5c06\u5176\u53d1\u9001\u5230\u7279\u5b9a\u7684\u4e3b\u9898\uff08Topic\uff09\uff0c\u8ba2\u9605\u8005\u5219\u901a\u8fc7\u8ba2\u9605\u76f8\u5e94\u7684\u4e3b\u9898\u6765\u63a5\u6536\u8be5\u4e3b\u9898\u7684\u6d88\u606f\u3002\u8fd9\u79cd\u6a21\u5f0f\u4f7f\u5f97MQTT \u534f\u8bae\u975e\u5e38\u7075\u6d3b\uff0c\u5e76\u4e14\u53ef\u4ee5\u5904\u7406\u5927\u91cf\u7684\u6d88\u606f\u4f20\u8f93\u3002<\/p>\n

\u5728 Android \u5e94\u7528\u7a0b\u5e8f\u4e2d\uff0c\u53ef\u4ee5\u4f7f\u7528 Eclipse Paho MQTT \u5ba2\u6237\u7aef\u5e93\u5b9e\u73b0 MQTT \u901a\u4fe1\u3002\u4ee5\u4e0b\u662f Eclipse Paho MQTT \u5ba2\u6237\u7aef\u5e93\u7684\u4e00\u4e9b\u4e3b\u8981\u7ec4\u4ef6\uff1a<\/p>\n

1. MqttAsyncClient\uff1a\u4e0e MQTT \u670d\u52a1\u5668\u8fdb\u884c\u5f02\u6b65\u901a\u4fe1\u7684\u4e3b\u8981\u7ec4\u4ef6<\/p>\n

2. MqttConnectOptions\uff1a\u8bbe\u7f6e\u8fde\u63a5\u5230 MQTT \u670d\u52a1\u5668\u6240\u9700\u7684\u9009\u9879\uff0c\u4f8b\u5982\u7528\u6237\u540d\u548c\u5bc6\u7801<\/p>\n

3. MqttMessage\uff1a\u8868\u793a\u53d1\u5e03\u7684\u6d88\u606f<\/p>\n

4. MqttCallback\uff1a\u5b9e\u73b0\u8be5\u63a5\u53e3\u4ee5\u5904\u7406\u4ece MQTT \u670d\u52a1\u5668\u6536\u5230\u7684\u6570\u636e<\/p>\n

\u4e0b\u9762\u662f\u5728 Android \u5e94\u7528\u7a0b\u5e8f\u4e2d\u5b9e\u73b0 MQTT \u534f\u8bae\u7684\u7b80\u5355\u6b65\u9aa4\uff1a<\/p>\n

1. \u6dfb\u52a0 Eclipse Paho MQTT \u5ba2\u6237\u7aef\u5e93\u4f9d\u8d56\u9879\uff1a<\/p>\n

\u5728 build.gradle \u6587\u4ef6\u4e2d\u6dfb\u52a0\u4ee5\u4e0b\u4f9d\u8d56\u5173\u7cfb\uff1a<\/p>\n

“`<\/p>\n

implementation ‘org.eclipse.paho:org.eclipse.paho.client.mqttv3:1.2.0’<\/p>\n

“`<\/p>\n

2. \u8fde\u63a5\u5230 MQTT \u670d\u52a1\u5668\uff1a<\/p>\n

\u5728\u5e94\u7528\u7a0b\u5e8f\u4e2d\u521b\u5efa\u4e00\u4e2a MqttAsyncClient \u5b9e\u4f8b\u5e76\u8fde\u63a5\u5230 MQTT \u670d\u52a1\u5668\u3002\u60a8\u53ef\u4ee5\u4f7f\u7528 MqttConnectOptions \u5bf9\u8c61\u8bbe\u7f6e\u8fde\u63a5\u6240\u9700\u7684\u9009\u9879\uff08\u4f8b\u5982\u7528\u6237\u540d\u548c\u5bc6\u7801\uff09\u3002<\/p>\n

“`<\/p>\n

MqttAsyncClient mqttClient = new MqttAsyncClient(serverURI, clientId, null);<\/p>\n

MqttConnectOptions connOpts = new MqttConnectOptions();<\/p>\n

connOpts.setCleanSession(true);<\/p>\n

connOpts.setUserName(username);<\/p>\n

connOpts.setPassword(password.toCharArray());<\/p>\n

IMqttToken token = mqttClient.connect(connOpts);<\/p>\n

token.waitForCompletion();<\/p>\n

“`<\/p>\n

3. \u8ba2\u9605\u4e3b\u9898\uff1a<\/p>\n

\u53ef\u4f7f\u7528 MqttAsyncClient.subscribe() \u65b9\u6cd5\u8ba2\u9605\u4e3b\u9898\uff0c\u4f8b\u5982 “mytopic”\uff0c\u5e76\u6307\u5b9a\u4e00\u4e2a\u5b9e\u73b0 MqttCallback \u63a5\u53e3\u7684\u5bf9\u8c61\u4ee5\u5904\u7406\u4ece MQTT \u670d\u52a1\u5668\u63a5\u6536\u5230\u7684\u6d88\u606f\uff1a<\/p>\n

“`<\/p>\n

IMqttToken subToken = mqttClient.subscribe(“mytopic”, QoS, new MqttCallback() {<\/p>\n

@Override<\/p>\n

public void connectionLost(Throwable cause) {<\/p>\n

\/\/ \u5904\u7406\u8fde\u63a5\u4e22\u5931\u60c5\u51b5<\/p>\n

}<\/p>\n

@Override<\/p>\n

public void messageArrived(String topic, MqttMessage message) throws Exception {<\/p>\n

\/\/ \u5904\u7406\u6536\u5230\u7684\u6d88\u606f<\/p>\n

}<\/p>\n

@Override<\/p>\n

public void deliveryComplete(IMqttDeliveryToken token) {<\/p>\n

\/\/ \u5904\u7406\u4f20\u9012\u5b8c\u6210\u60c5\u51b5<\/p>\n

}<\/p>\n

});<\/p>\n

subToken.waitForCompletion();<\/p>\n

“`<\/p>\n

4. \u53d1\u5e03\u6d88\u606f\uff1a<\/p>\n

\u8981\u53d1\u5e03\u6d88\u606f\uff0c\u8bf7\u4f7f\u7528 MqttAsyncClient.p\u5b89\u5353app<\/a>ublish() \u65b9\u6cd5\u3002\u4f8b\u5982\uff0c\u4ee5\u4e0b\u4ee3\u7801\u53d1\u5e03\u4e00\u4e2a\u5305\u542b\u201cHello, MQT\u5b89\u5353app\u5f00\u53d1\u5de5\u5177<\/a>T!\u201d\u7684\u6d88\u606f\u5230\u201cmytopic\u201d\u4e3b\u9898\uff1a<\/p>\n

“`<\/p>\n

String messageContent = “Hello, MQTT!”;<\/p>\n

MqttMessage message = new MqttMessage(messageContent.getBytes());<\/p>\n

message.setQos(QoS);<\/p>\n

IMqttDeliveryToken pubToken = mqttClient.publish(“mytopic”, message);<\/p>\n

pubToken.waitForCompletion();<\/p>\n

“`<\/p>\n

\u8fd9\u662f\u4e00\u4e2a\u7b80\u5355\u7684\u793a\u4f8b\uff0c\u7528\u4e8e\u8bf4\u660e\u5982\u4f55\u5728 Android \u5e94\u7528\u7a0b\u5e8f\u4e2d\u4f7f\u7528 MQTT \u534f\u8bae\u3002\u4f7f\u7528\u4e00\u4e9b\u5176\u4ed6\u7684\u9009\u9879\u548c\u529f\u80fd\uff0c\u60a8\u53ef\u4ee5\u521b\u5efa\u66f4\u4e3a\u590d\u6742\u548c\u529f\u80fd\u5f3a\u5927\u7684\u5e94\u7528\u7a0b\u5e8f\u3002<\/p>\n","protected":false},"excerpt":{"rendered":"

MQTT\uff08Message Queuing Telemetry Transport\uff09\u662f\u4e00\u4e2a\u8f7b\u91cf\u7ea7\u7684\u6d88\u606f\u4f20\u9012\u534f\u8bae\uff0c\u5b83\u9002\u7528\u4e8e\u5404\u79cd\u7269\u8054\u7f51\u8bbe\u5907\u548c\u5e94\u7528\u7a0b\u5e8f\u4e4b\u95f4\u7684\u901a\u4fe1\u3002Android \u5e94\u7528\u7a0b\u5e8f\u53ef\u4ee5\u901a\u8fc7 MQTT <\/p>\n","protected":false},"author":16,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[10],"tags":[28412,28411,1775,1024,962],"class_list":{"0":"post-22550","1":"post","2":"type-post","3":"status-publish","4":"format-standard","5":"hentry","6":"category-appkaifa","7":"tag-app","9":"tag-1775","10":"tag-1024","11":"tag-962"},"_links":{"self":[{"href":"https:\/\/app.applebyme.cn\/cloud\/wp-json\/wp\/v2\/posts\/22550","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/app.applebyme.cn\/cloud\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/app.applebyme.cn\/cloud\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/app.applebyme.cn\/cloud\/wp-json\/wp\/v2\/users\/16"}],"replies":[{"embeddable":true,"href":"https:\/\/app.applebyme.cn\/cloud\/wp-json\/wp\/v2\/comments?post=22550"}],"version-history":[{"count":1,"href":"https:\/\/app.applebyme.cn\/cloud\/wp-json\/wp\/v2\/posts\/22550\/revisions"}],"predecessor-version":[{"id":22585,"href":"https:\/\/app.applebyme.cn\/cloud\/wp-json\/wp\/v2\/posts\/22550\/revisions\/22585"}],"wp:attachment":[{"href":"https:\/\/app.applebyme.cn\/cloud\/wp-json\/wp\/v2\/media?parent=22550"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/app.applebyme.cn\/cloud\/wp-json\/wp\/v2\/categories?post=22550"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/app.applebyme.cn\/cloud\/wp-json\/wp\/v2\/tags?post=22550"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}