引起：com.google.gson.TokenMgrError：第 1 行第 1 列的词法错误。遇到：“<”（60），之后：“”

Question

在我的 android 应用程序中，我遇到了一个非常奇怪的错误，无法进入它的根目录。我进行网络调用并解析 JSON 响应。但应用程序崩溃，我收到以下错误。

它是随机发生的，无法重现错误。如果以前遇到过这种情况的人能告诉我什么可能引发这次崩溃，那将非常方便。

com.google.gson.JsonParseException: Failed parsing JSON source: java.io.StringReader@40e13578 to Json
    at com.google.gson.JsonParser.parse(JsonParser.java:57)
    at com.google.gson.Gson.fromJson(Gson.java:443)
    at com.google.gson.Gson.fromJson(Gson.java:396)
    at com.google.gson.Gson.fromJson(Gson.java:372)
    at com.xyz.getStaffFromJson(JsonUtils.java:201)
    at com.xyz.getMyDetails(WebAPI.java:666)
    at com.xyz.OptimisedSyncService.onHandleIntent(OptimisedSyncService.java:147)
    at android.app.IntentService$ServiceHandler.handleMessage(IntentService.java:65)
    at android.os.Handler.dispatchMessage(Handler.java:99)
    at android.os.Looper.loop(Looper.java:156)
    at android.os.HandlerThread.run(HandlerThread.java:60)
    Caused by: com.google.gson.TokenMgrError: Lexical error at line 1, column 1. Encountered: \"<\" (60), after : \"\"
    at com.google.gson.JsonParserJavaccTokenManager.getNextToken(JsonParserJavaccTokenManager.java:1168)
    at com.google.gson.JsonParserJavacc.jj_ntk(JsonParserJavacc.java:635)
    at com.google.gson.JsonParserJavacc.parse(JsonParserJavacc.java:10)
    at com.google.gson.JsonParser.parse(JsonParser.java:54)
    ... 10 more
    com.google.gson.TokenMgrError: Lexical error at line 1, column 1. Encountered: \"<\" (60), after : \"\"
    at com.google.gson.JsonParserJavaccTokenManager.getNextToken(JsonParserJavaccTokenManager.java:1168)
    at com.google.gson.JsonParserJavacc.jj_ntk(JsonParserJavacc.java:635)
    at com.google.gson.JsonParserJavacc.parse(JsonParserJavacc.java:10)
    at com.google.gson.JsonParser.parse(JsonParser.java:54)
    at com.google.gson.Gson.fromJson(Gson.java:443)
    at com.google.gson.Gson.fromJson(Gson.java:396)
    at com.google.gson.Gson.fromJson(Gson.java:372)
    at com.xyz.getStaffFromJson(JsonUtils.java:201)
    at com.xyz.getMyDetails(WebrosterAPI.java:666)
    at com.xyz.OptimisedSyncService.onHandleIntent(OptimisedSyncService.java:147)
    at android.app.IntentService$ServiceHandler.handleMessage(IntentService.java:65)
    at android.os.Handler.dispatchMessage(Handler.java:99)
    at android.os.Looper.loop(Looper.java:156)
    at android.os.HandlerThread.run(HandlerThread.java:60)

示例响应： {"mcode":"123","mobilesettings":{"mobile":"07405123154","email":"rcb@rtc.com","telephone":"0174465599","timeout":20,"mail_address ":"abc.gmail.com","mail_user":"mail.user@gmail.com","mail_password":"password","task_state":0,"force_task_reason":0,"allow_free_task_reason":1, "unsent_sync":10,"booking_sync":240,"default_scan_mode":0,"gps_enabled":1,"gps_poll_interval":5,"minimum_gps_accuracy":100.0,"allow_blank_aborted_reason":false,"allow_free_aborted_reason":true},"员工”：{“json_class”：“员工”，“staff_id”：1234，“title”：“”，“fname”：“rags”，“mname”：“”，“sname”：“rags”，“location_id” ":321,"pager":"","mobile":"07444456789","email":"abc@def.com","website":"","dob":null,"job_title":"" ,"uid_ref":1,"dt_stamp":"2 月 11 日星期二 13:13:44 +0000 2014","pin_no":"","wroptions":0,"dt_created":"12 月 4 日星期三 16:13: 08 +0000 2013","user_created":1,"pin_start":"1234","pin_end":"1234","payroll_report":"Payroll.xml","external_payroll_ref":"","payroll_export":" Payroll.sql","supplier":0,"is_saved":1}}

Answer 1

我发现在期待 json 响应时，我收到了来自强制门户 wifi 的 html 响应，例如 BT 热点或 Virgin 媒体热点。因此解析器失败并导致错误。