how to solve setOnCameraChangeListener Error method in google map

Question

i'm implementing google maps in an android project . But as soon as i moved my project into another PC machine i'm facing app crashs and this error message in my logcat console :

FATAL EXCEPTION: main
Process: com.egsdigital.dolan, PID: 24887
java.lang.RuntimeException: Unable to start activity ComponentInfo{com.egsdigital.dolan/com.egsdigital.dolan.Activities.MainPage_Pasenger}: java.lang.NullPointerException: Attempt to invoke virtual method 'void com.google.android.gms.maps.GoogleMap.setOnCameraChangeListener(com.google.android.gms.maps.GoogleMap$OnCameraChangeListener)' on a null object reference
at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2416)
at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:2476)
at android.app.ActivityThread.-wrap11(ActivityThread.java)
at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1344)
at android.os.Handler.dispatchMessage(Handler.java:102)
at android.os.Looper.loop(Looper.java:148)
at android.app.ActivityThread.main(ActivityThread.java:5417)
at java.lang.reflect.Method.invoke(Native Method)
at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:726)
at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:616)
Caused by: java.lang.NullPointerException: Attempt to invoke virtual method 'void com.google.android.gms.maps.GoogleMap.setOnCameraChangeListener(com.google.android.gms.maps.GoogleMap$OnCameraChangeListener)' on a null object reference
at com.egsdigital.dolan.Activities.MainPage_Pasenger.onCreate(MainPage_Pasenger.java:178)
at android.app.Activity.performCreate(Activity.java:6237)
at android.app.Instrumentation.callActivityOnCreate(Instrumentation.java:1107)
at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2369)
at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:2476) 
at android.app.ActivityThread.-wrap11(ActivityThread.java) 
at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1344) 
at android.os.Handler.dispatchMessage(Handler.java:102) 
at android.os.Looper.loop(Looper.java:148) 
at android.app.ActivityThread.main(ActivityThread.java:5417) 
at java.lang.reflect.Method.invoke(Native Method)

and here where the error points on:

 map.setOnCameraChangeListener(new GoogleMap.OnCameraChangeListener() {
        @Override
        public void onCameraChange(CameraPosition position) {
            LatLngBounds bounds = map.getProjection().getVisibleRegion().latLngBounds;
            mAdapter.setBounds(bounds);
        }
    });

thanks so much.

no dear Kon it's a different question. i found correct answer now. — Siamak, Jun 12 '16 at 08:40

score 3 · Accepted Answer · edited May 23 '17 at 12:26

3

you must add new SHA1 into google console.
See this link for fetch SHA1 from your OS : How to get the SHA1 fingerprint certificate in android studio for debug mode

After fetching your SHA1 code, insert into console.developers and running Application .

Hope help you

edited May 23 '17 at 12:26

Community

1
1

answered Jun 12 '16 at 08:32

Mohammad Nouri

2,245
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woow ! thanks buddy! it really solved my problem and now its running perfectly . Thanks a lot Mohammad. – Siamak Jun 12 '16 at 08:35

how to solve setOnCameraChangeListener Error method in google map

1 Answers1