项目中原依赖是：
implementation('org.eclipse.paho:org.eclipse.paho.android.service:1.1.1') {exclude module: 'support-v4'transitive = true
}
implementation 'org.eclipse.paho:org.eclipse.paho.client.mqttv3:1.2.5'
在Android10系统运行正常，能够连接服务端，在Android13中出错，log如下：
E/AndroidRuntime: FATAL EXCEPTION: MQTT Rec: paho4782357715513
Process: com.xxx.xxxx, PID: 24859
java.lang.IllegalArgumentException: com.xxx.xxxx: Targeting S+ (version 31 and above) requires that one of FLAG_IMMUTABLE or FLAG_MUTABLE be specified when creating a PendingIntent.
Strongly consider using FLAG_IMMUTABLE, only use FLAG_MUTABLE if some functionality depends on the PendingIntent being mutable, e.g. if it needs to be used with inline replies or bubbles.
at android.app.PendingIntent.checkFlags(PendingIntent.java:401)
at android.app.PendingIntent.getBroadcastAsUser(PendingIntent.java:671)
at android.app.PendingIntent.getBroadcast(PendingIntent.java:658)
at org.eclipse.paho.android.service.AlarmPingSender.start(AlarmPingSender.java:76)
at org.eclipse.paho.client.mqttv3.internal.ClientState.connected(ClientState.java:1214)
at org.eclipse.paho.client.mqttv3.internal.ClientState.notifyReceivedAck(ClientState.java:1050)
at org.eclipse.paho.client.mqttv3.internal.CommsReceiver.run(CommsReceiver.java:151)
at java.lang.Thread.run(Thread.java:1012)
查询系统中使用：PendingIntent的地方做了版本判断，
PendingIntent piResult;
if (android.os.Build.VERSION.SDK_INT >= android.os.Build.VERSION_CODES.S) {piResult = PendingIntent.getActivity(context, 0, resultIntent, PendingIntent.FLAG_IMMUTABLE);
} else {piResult = PendingIntent.getActivity(context, 0, resultIntent, PendingIntent.FLAG_ONE_SHOT);
}
替换后依然启动报错，错误如上面相同，然后查询方法（mqtt库无法兼容高版本android13的问题），给与帮助， 使用
paho.mqtt.android 3.3.0 的版本可以正常运行，
下载 serviceLibrary-release.aar导入项目libs中，dependencies中添加依赖
implementation files('libs/serviceLibrary-release.aar')
移除依赖： implementation('org.eclipse.paho:org.eclipse.paho.android.service:1.1.1')
原先所有导入import org.eclipse.paho.android.service.MqttAndroidClient 替换成：import info.mqtt.android.service.MqttAndroidClient ；
在MQTT android客户端，添加最后一个Ack.AUTO_ACK参数
client = new MqttAndroidClient(context, serverURI, clientId, Ack.AUTO_ACK);
替换后运行出现的错误是：
E/AndroidRuntime: FATAL EXCEPTION: MQTT Rec: paho5848521383808
Process: com.xxx.xxx, PID: 29345
java.lang.NoClassDefFoundError: Failed resolution of: Ltimber/log/Timber;
at info.mqtt.android.service.ping.AlarmPingSender.start(AlarmPingSender.kt:57)
at org.eclipse.paho.client.mqttv3.internal.ClientState.connected(ClientState.java:1214)
at org.eclipse.paho.client.mqttv3.internal.ClientState.notifyReceivedAck(ClientState.java:1050)
at org.eclipse.paho.client.mqttv3.internal.CommsReceiver.run(CommsReceiver.java:151)
at java.lang.Thread.run(Thread.java:1012)
Caused by: java.lang.ClassNotFoundException: Didn't find class "timber.log.Timber" on path: DexPathList[[zip file "/data/app/~~3Ta3tpvBlIuf4vOif31Pcg==/com.zpd.mdm-07aOyZj6lephuXGMHk0ADA==/base.apk"],nativeLibraryDirectories=[/data/app/~~3Ta3tpvBlIuf4vOif31Pcg==/com.zpd.mdm-07aOyZj6lephuXGMHk0ADA==/lib/arm64, /data/app/~~3Ta3tpvBlIuf4vOif31Pcg==/com.zpd.mdm-07aOyZj6lephuXGMHk0ADA==/base.apk!/lib/arm64-v8a, /system/lib64, /system/system_ext/lib64]]
at dalvik.system.BaseDexClassLoader.findClass(BaseDexClassLoader.java:259)
at java.lang.ClassLoader.loadClass(ClassLoader.java:379)
at java.lang.ClassLoader.loadClass(ClassLoader.java:312)
at info.mqtt.android.service.ping.AlarmPingSender.start(AlarmPingSender.kt:57)
at org.eclipse.paho.client.mqttv3.internal.ClientState.connected(ClientState.java:1214)
at org.eclipse.paho.client.mqttv3.internal.ClientState.notifyReceivedAck(ClientState.java:1050)
at org.eclipse.paho.client.mqttv3.internal.CommsReceiver.run(CommsReceiver.java:151)
at java.lang.Thread.run(Thread.java:1012)
然后添加timber导入：
implementation 'com.jakewharton.timber:timber:4.7.1'
编译后重新运行正常了
