diff options
Diffstat (limited to 'src/main/java/org/traccar')
| -rw-r--r-- | src/main/java/org/traccar/protocol/MictrackProtocolDecoder.java | 8 |
1 files changed, 6 insertions, 2 deletions
diff --git a/src/main/java/org/traccar/protocol/MictrackProtocolDecoder.java b/src/main/java/org/traccar/protocol/MictrackProtocolDecoder.java index 0f815ca7b..ec4f97919 100644 --- a/src/main/java/org/traccar/protocol/MictrackProtocolDecoder.java +++ b/src/main/java/org/traccar/protocol/MictrackProtocolDecoder.java @@ -209,8 +209,12 @@ public class MictrackProtocolDecoder extends BaseProtocolDecoder { } private Object decodeLowAltitude( - Channel channel, SocketAddress remoteAddress, String sentence) throws Exception { - String deviceId = sentence.substring(0, sentence.indexOf("$")); + Channel channel, SocketAddress remoteAddress, String sentence) { + int separator = sentence.indexOf("$"); + if (separator < 0) { + return null; + } + String deviceId = sentence.substring(0, separator); DeviceSession deviceSession = getDeviceSession(channel, remoteAddress, deviceId); if (deviceSession == null) { |