Onclick StartNavigation Crash

[rspapneja]

I am trying to create navigation between to locations.
I am using MAPVIEW for tracking or showing on screen. But, When i click on start navigation button App getting creashed with that error. Error showing below. If anybody have any solution please help me..
//==========================================================
button.setOnClickListener(new View.OnClickListener() {
@OverRide
public void onClick(View v) {
boolean simulateRoute = true;
NavigationLauncherOptions options = NavigationLauncherOptions.builder()
.directionsRoute(currentRoute)
.shouldSimulateRoute(simulateRoute)
.build();
// Call this method with Context from within an Activity
NavigationLauncher.startNavigation(NavigationMapClass.this, options);
}
});

//============================================================

java.lang.RuntimeException: Unable to start activity ComponentInfo{com.toyota.navigationmapboxapp/com.mapbox.services.android.navigation.ui.v5.MapboxNavigationActivity}: java.lang.NullPointerException: Attempt to invoke virtual method 'void com.mapbox.services.android.navigation.ui.v5.NavigationView.onCreate(android.os.Bundle)' on a null object reference
at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:3270)
at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:3409)
at android.app.servertransaction.LaunchActivityItem.execute(LaunchActivityItem.java:83)
at android.app.servertransaction.TransactionExecutor.executeCallbacks(TransactionExecutor.java:135)
at android.app.servertransaction.TransactionExecutor.execute(TransactionExecutor.java:95)
at android.app.ActivityThread$H.handleMessage(ActivityThread.java:2016)
at android.os.Handler.dispatchMessage(Handler.java:107)
at android.os.Looper.loop(Looper.java:214)
at android.app.ActivityThread.main(ActivityThread.java:7356)
at java.lang.reflect.Method.invoke(Native Method)
at com.android.internal.os.RuntimeInit$MethodAndArgsCaller.run(RuntimeInit.java:492)
at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:930)
Caused by: java.lang.NullPointerException: Attempt to invoke virtual method 'void com.mapbox.services.android.navigation.ui.v5.NavigationView.onCreate(android.os.Bundle)' on a null object reference
at com.mapbox.services.android.navigation.ui.v5.MapboxNavigationActivity.onCreate(MapboxNavigationActivity.java:32)
at android.app.Activity.performCreate(Activity.java:7802)
at android.app.Activity.performCreate(Activity.java:7791)
at android.app.Instrumentation.callActivityOnCreate(Instrumentation.java:1299)
at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:3245)