是的,AWS IoT可以连接移动设备。下面是一个示例代码,展示了如何在Android应用程序中使用AWS IoT SDK连接到AWS IoT。
首先,确保你已经在AWS控制台中创建了一个AWS IoT设备,获取了设备的证书和密钥。
implementation 'com.amazonaws:aws-android-sdk-iot:2.16.4'
implementation 'com.amazonaws:aws-android-sdk-core:2.16.4'
AWSIoTManager
,并在其中添加以下代码:import com.amazonaws.auth.CognitoCachingCredentialsProvider;
import com.amazonaws.mobileconnectors.iot.AWSIotMqttClientStatusCallback;
import com.amazonaws.mobileconnectors.iot.AWSIotMqttManager;
import com.amazonaws.regions.Regions;
public class AWSIoTManager {
private static final String CUSTOMER_SPECIFIC_ENDPOINT = "YOUR_IOT_ENDPOINT";
private static final String COGNITO_POOL_ID = "YOUR_COGNITO_POOL_ID";
private static final String COGNITO_REGION = "YOUR_COGNITO_REGION";
private static final String KEYSTORE_NAME = "YOUR_KEYSTORE_NAME";
private static final String KEYSTORE_PASSWORD = "YOUR_KEYSTORE_PASSWORD";
private static final String CERTIFICATE_ID = "YOUR_CERTIFICATE_ID";
private AWSIotMqttManager mqttManager;
public AWSIoTManager(Context context) {
AWSMobileClient.getInstance().initialize(context).execute();
CognitoCachingCredentialsProvider credentialsProvider = new CognitoCachingCredentialsProvider(
context, COGNITO_POOL_ID, Regions.fromName(COGNITO_REGION));
mqttManager = new AWSIotMqttManager(CUSTOMER_SPECIFIC_ENDPOINT, CERTIFICATE_ID, KEYSTORE_NAME, KEYSTORE_PASSWORD);
mqttManager.setKeepAlive(10); // 设置心跳包间隔(秒)
mqttManager.setAutoReconnect(true); // 设置自动重连
mqttManager.setMaxAutoReconnectAttempts(10); // 设置自动重连尝试次数
mqttManager.setReconnectRetryLimits(0, 60); // 设置重连间隔时间(秒)
mqttManager.setClientId("YOUR_CLIENT_ID"); // 设置客户端ID
mqttManager.setCredentialsProvider(credentialsProvider);
}
public void connect() {
mqttManager.connect(credentialsProvider, new AWSIotMqttClientStatusCallback() {
@Override
public void onStatusChanged(final AWSIotMqttClientStatus status, final Throwable throwable) {
if (status == AWSIotMqttClientStatus.Connecting) {
Log.i(TAG, "连接中...");
} else if (status == AWSIotMqttClientStatus.Connected) {
Log.i(TAG, "已连接");
} else if (status == AWSIotMqttClientStatus.Reconnecting) {
if (throwable != null) {
Log.e(TAG, "重新连接失败", throwable);
}
Log.i(TAG, "重新连接中...");
} else if (status == AWSIotMqttClientStatus.ConnectionLost) {
if (throwable != null) {
Log.e(TAG, "连接丢失", throwable);
}
Log.i(TAG, "连接丢失");
} else {
Log.i(TAG, "连接失败");
}
}
});
}
public void publish(String topic, String message) {
try {
mqttManager.publishString(message, topic, AWSIotMqttQos.QOS0);
} catch (Exception e) {
Log.e(TAG, "发布消息失败", e);
}
}
public void disconnect() {
mqttManager.disconnect();
}
}
请确保将YOUR_IOT_ENDPOINT
、YOUR_COGNITO_POOL_ID
、YOUR_COGNITO_REGION
、YOUR_KEYSTORE_NAME
、YOUR_KEYSTORE_PASSWORD
和YOUR_CERTIFICATE_ID
替换为你自己的值。
AWSIoTManager
类:AWSIoTManager awsIoTManager = new AWSIoTManager(this);
awsIoTManager.connect();
// 发布消息
awsIoTManager.publish("YOUR_TOPIC", "YOUR_MESSAGE");
// 断开连接
awsIoTManager.disconnect();
将YOUR_TOPIC
替换为你想