java.lang.RuntimeException: Unable to start activity ComponentInfo{com.toucan.reactnative/com.toucan.reactnative.activity.MainActivity}: 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:2760)
at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:2846)
at android.app.ActivityThread.-wrap12(ActivityThread.java)
at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1550)
at android.os.Handler.dispatchMessage(Handler.java:102)
at android.os.Looper.loop(Looper.java:154)
at android.app.ActivityThread.main(ActivityThread.java:6322)
at java.lang.reflect.Method.invoke(Native Method)
at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:886)
at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:776)
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.toucan.reactnative.fragment.ToucanMapFragment.onCreateView(ToucanMapFragment.java:62)
at android.support.v4.app.Fragment.performCreateView(Fragment.java:2192)
at android.support.v4.app.FragmentManagerImpl.moveToState(FragmentManager.java:1299)