首次使用高德地图SDK进行开发
SDK版本是3.1.0
已经按照官方文档配置好了key和其他配置，并且已经确认无误，当运行程序的时候，会
官方文档写出必须调用 mapView.onCreate(savedInstanceState)方法，而报错恰恰就是这个方法，不解中，希望有能指点下的
显示如下错误：
12-20 23:19:45.136 15835-15835/com.mapinfo.gaodemap E/AndroidRuntime: FATAL EXCEPTION: main
Process: com.mapinfo.gaodemap, PID: 15835
java.lang.RuntimeException: Unable to start activity ComponentInfo{com.mapinfo.gaodemap/com.mapinfo.gaodemap.HomeActivity}: java.lang.NullPointerException: Attempt to invoke virtual method 'void com.amap.api.maps.MapView.onCreate(android.os.Bundle)' on a null object reference
at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2325)
at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:2387)
at android.app.ActivityThread.access$800(ActivityThread.java:151)
at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1303)
at android.os.Handler.dispatchMessage(Handler.java:102)
at android.os.Looper.loop(Looper.java:135)
at android.app.ActivityThread.main(ActivityThread.java:5254)
at java.lang.reflect.Method.invoke(Native Method)
at java.lang.reflect.Method.invoke(Method.java:372)
at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:903)
at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:698)
Caused by: java.lang.NullPointerException: Attempt to invoke virtual method 'void com.amap.api.maps.MapView.onCreate(android.os.Bundle)' on a null object reference
at com.mapinfo.gaodemap.HomeActivity.onCreate(HomeActivity.java:32)
at android.app.Activity.performCreate(Activity.java:5990)
at android.app.Instrumentation.callActivityOnCreate(Instrumentation.java:1106)
at com.lbe.client.zz.ba.callActivityOnCreate(InstrumentationDelegate.java:76)
at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2278)
at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:2387)
at android.app.ActivityThread.access$800(ActivityThread.java:151)
at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1303)
at android.os.Handler.dispatchMessage(Handler.java:102)
at android.os.Looper.loop(Looper.java:135)
at android.app.ActivityThread.main(ActivityThread.java:5254)
at java.lang.reflect.Method.invoke(Native Method)
at java.lang.reflect.Method.invoke(Method.java:372)
at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:903)
at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:698)
我也遇到这个问题了 findViewById写了的 mapView不是null 是因为mapView.onCreate(savedInstanceState)这里面传入的savedInstanceState为null 导致的
mapView是null
估计你忘记findViewById了吧。可以单点调试下