我们开始研究 Skobbler 地图并使用我们在 Skobbler 帐户中生成的 API 密钥下载演示项目 AndroidOpenSourceDemoGradle，并开始研究我们自己的纬度和经度值。我们尝试launchRouteCalculation()通过以SKCordinate.
在同样的方法中，我们com.skobbler.ngx.routing.SKRouteManager.calculateRouteWithPoints()通过传递一个包含纬度和经度值的列表SKPostion对象以及SKRouteSettings对象来调用。
我们尝试过的代码
List pointsList = new ArrayList();
pointsList.add(new SKPosition(23.609239, 46.767936));
pointsList.add(new SKPosition(23.609149, 46.769281));
pointsList.add(new SKPosition(23.605704, 46.768879));
// set the route listener
SKRouteManager.getInstance().setRouteListener(this);
SKRouteSettings routeSettings = new SKRouteSettings();
//set route mode
routeSettings.setRouteMode(SKRouteMode.CAR_FASTEST);
SKRouteManager.getInstance().calculateRouteWithPoints(pointsList,routeSettings);
但是我们以错误说明结束
GPX 轨道导航可用于企业许可证的商业用途”和 JNI 检测到应用程序错误：jmethodID 为 NULL。
我们在日志中遇到的确切错误声明如下
04-27 23:31:44.881 9577-9577/com.skobbler.sdkdemo E/SKRouteManager: GPX track navigation is available for commercial use with a enterprise license
04-27 23:31:44.950 9577-9577/com.skobbler.sdkdemo A/art: art/runtime/check_jni.cc:65] JNI DETECTED ERROR IN APPLICATION: jmethodID was NULL
04-27 23:31:44.950 9577-9577/com.skobbler.sdkdemo A/art: art/runtime/check_jni.cc:65] in call to CallDoubleMethodV
04-27 23:31:44.950 9577-9577/com.skobbler.sdkdemo A/art: art/runtime/check_jni.cc:65] from void com.skobbler.ngx.routing.SKRouteManager.createroutefromgpspoints(com.skobbler.ngx.positioner.SKPosition[], int, boolean, boolean, boolean, boolean)
04-27 23:31:44.950 9577-9577/com.skobbler.sdkdemo A/art: art/runtime/check_jni.cc:65] "main" prio=5 tid=1 Runnable
04-27 23:31:44.950 9577-9577/com.skobbler.sdkdemo A/art: art/runtime/check_jni.cc:65] | group="main" sCount=0 dsCount=0 obj=0x74ab0000 self=0xf4c27800
04-27 23:31:44.950 9577-9577/com.skobbler.sdkdemo A/art: art/runtime/check_jni.cc:65] | sysTid=9577 nice=0 cgrp=default sched=0/0 handle=0xf723bbec
04-27 23:31:44.950 9577-9577/com.skobbler.sdkdemo A/art: art/runtime/check_jni.cc:65] | state=R schedstat=( 1395219590 318169633 1433 ) utm=113 stm=26 core=0 HZ=100
04-27 23:31:44.950 9577-9577/com.skobbler.sdkdemo A/art: art/runtime/check_jni.cc:65] | stack=0xff563000-0xff565000 stackSize=8MB
04-27 23:31:44.950 9577-9577/com.skobbler.sdkdemo A/art: art/runtime/check_jni.cc:65] | held mutexes= "mutator lock"(shared held)
04-27 23:31:44.950 9577-9577/com.skobbler.sdkdemo A/art: art/runtime/check_jni.cc:65] native: #00 pc 0000485c /system/lib/libbacktrace_libc++.so (UnwindCurrent::Unwind(unsigned int, ucontext*)+23)
04-27 23:31:44.950 9577-9577/com.skobbler.sdkdemo A/art: art/runtime/check_jni.cc:65] native: #01 pc 00003005 /system/lib/libbacktrace_libc++.so (Backtrace::Unwind(unsigned int, ucontext*)+8)
04-27 23:31:44.950 9577-9577/com.skobbler.sdkdemo A/art: art/runtime/check_jni.cc:65] native: #02 pc 00243911 /system/lib/libart.so (art::DumpNativeStack(std::__1::basic_ostream<char, std::__1::char_traits<char> >&, int, char const*, art::mirror::ArtMethod*)+68)
04-27 23:31:44.951 9577-9577/com.skobbler.sdkdemo A/art: art/runtime/check_jni.cc:65] native: #03 pc 00227cb9 /system/lib/libart.so (art::Thread::Dump(std::__1::basic_ostream<char, std::__1::char_traits<char> >&) const+144)
04-27 23:31:44.951 9577-9577/com.skobbler.sdkdemo A/art: art/runtime/check_jni.cc:65] native: #04 pc 000aff1b /system/lib/libart.so (art::JniAbort(char const*, char const*)+582)
04-27 23:31:44.951 9577-9577/com.skobbler.sdkdemo A/art: art/runtime/check_jni.cc:65] native: #05 pc 000b0661 /system/lib/libart.so (art::JniAbortF(char const*, char const*, ...)+60)
04-27 23:31:44.951 9577-9577/com.skobbler.sdkdemo A/art: art/runtime/check_jni.cc:65] native: #06 pc 000b090b /system/lib/libart.so (art::ScopedCheck::CheckSig(_jmethodID*, char const*, bool) (.constprop.131)+358)
04-27 23:31:44.951 9577-9577/com.skobbler.sdkdemo A/art: art/runtime/check_jni.cc:65] native: #07 pc 000ba779 /system/lib/libart.so (art::CheckJNI::CallDoubleMethodV(_JNIEnv*, _jobject*, _jmethodID*, std::__va_list)+60)
04-27 23:31:44.951 9577-9577/com.skobbler.sdkdemo A/art: art/runtime/check_jni.cc:65] native: #08 pc 000fa67b /data/app/com.skobbler.sdkdemo-1/lib/arm/libngnative.so (_JNIEnv::CallDoubleMethod(_jobject*, _jmethodID*, ...)+22)
04-27 23:31:44.951 9577-9577/com.skobbler.sdkdemo A/art: art/runtime/check_jni.cc:65] native: #09 pc 000e9df1 /data/app/com.skobbler.sdkdemo-1/lib/arm/libngnative.so (Java_com_skobbler_ngx_routing_SKRouteManager_createroutefromgpspoints+144)
04-27 23:31:44.951 9577-9577/com.skobbler.sdkdemo A/art: art/runtime/check_jni.cc:65] native: #10 pc 0019c8d3 /data/dalvik-cache/arm/data@app@com.skobbler.sdkdemo-1@base.apk@classes.dex (Java_com_skobbler_ngx_routing_SKRouteManager_createroutefromgpspoints___3Lcom_skobbler_ngx_positioner_SKPosition_2IZZZZ+142)
04-27 23:31:44.951 9577-9577/com.skobbler.sdkdemo A/art: art/runtime/check_jni.cc:65] at com.skobbler.ngx.routing.SKRouteManager.createroutefromgpspoints(Native method) 04-27 23:31:44.951 9577-9577/com.skobbler.sdkdemo A/art: art/runtime/check_jni.cc:65] atcom.skobbler.ngx.routing.SKRouteManager.calculateRouteWithPoints(SourceFile:327)
有人可以帮助我们解决这个错误吗？