fix npe crash (mapbox#318)

Guardiola31337 · web-flow · commit af701b47ffba · 2017-02-09T10:14:52.000+01:00
diff --git a/mapbox/app/src/main/java/com/mapbox/services/android/testapp/nav/OffRouteDetectionActivity.java b/mapbox/app/src/main/java/com/mapbox/services/android/testapp/nav/OffRouteDetectionActivity.java
@@ -372,7 +372,9 @@ public void run() {
   } // End startSimulation
 
   private void stopSimulation() {
-    handler.removeCallbacks(runnable);
+    if (handler != null && runnable != null) {
+      handler.removeCallbacks(runnable);
+    }
   }
 
   public static double computeHeading(LatLng from, LatLng to) {

Original file line number	Diff line number	Diff line change
`@@ -372,7 +372,9 @@ public void run() {`
`372`	`372`	`} // End startSimulation`
`373`	`373`
`374`	`374`	`private void stopSimulation() {`
`375`		`- handler.removeCallbacks(runnable);`
	`375`	`+ if (handler != null && runnable != null) {`
	`376`	`+ handler.removeCallbacks(runnable);`
	`377`	`+ }`
`376`	`378`	`}`
`377`	`379`
`378`	`380`	`public static double computeHeading(LatLng from, LatLng to) {`