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Indicator color changing method not working.

See original GitHub issue

In my activity, getting error on this line.

mController.setSelectedIndicatorColor(R.color.colorPrimary);

Error Log:

FATAL EXCEPTION: main
                                                                     Process: user.com.smartwashr, PID: 26838
                                                                     java.lang.RuntimeException: Unable to start activity ComponentInfo{user.com.smartwashr/user.com.smartwashr.activities.HowToActivity}: java.lang.NullPointerException: Attempt to invoke interface method 'void com.github.paolorotolo.appintro.IndicatorController.setSelectedIndicatorColor(int)' on a null object reference
                                                                         at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2572)
                                                                         at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:2654)
                                                                         at android.app.ActivityThread.-wrap11(ActivityThread.java)
                                                                         at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1488)
                                                                         at android.os.Handler.dispatchMessage(Handler.java:111)
                                                                         at android.os.Looper.loop(Looper.java:207)
                                                                         at android.app.ActivityThread.main(ActivityThread.java:5728)
                                                                         at java.lang.reflect.Method.invoke(Native Method)
                                                                         at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:789)
                                                                         at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:679)
                                                                      Caused by: java.lang.NullPointerException: Attempt to invoke interface method 'void com.github.paolorotolo.appintro.IndicatorController.setSelectedIndicatorColor(int)' on a null object reference
                                                                         at user.com.smartwashr.activities.HowToActivity.onCreate(HowToActivity.java:54)
                                                                         at android.app.Activity.performCreate(Activity.java:6309)
                                                                         at android.app.Instrumentation.callActivityOnCreate(Instrumentation.java:1113)
                                                                         at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2519)
                                                                         at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:2654) 
                                                                         at android.app.ActivityThread.-wrap11(ActivityThread.java) 
                                                                         at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1488) 
                                                                         at android.os.Handler.dispatchMessage(Handler.java:111) 
                                                                         at android.os.Looper.loop(Looper.java:207) 
                                                                         at android.app.ActivityThread.main(ActivityThread.java:5728) 
                                                                         at java.lang.reflect.Method.invoke(Native Method) 
                                                                         at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:789) 
                                                                         at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:679)

Issue Analytics

State:
Created 6 years ago
Comments:7 (3 by maintainers)

Top GitHub Comments

1reaction

zeeshansardar61commented, Jun 24, 2017

Thank you @paolorotolo for answer, @Almaral-Engineering try this , it helped me setIndicatorColor(getResources.getColor(R.id.blue), getResources.getColor(R.id.red));

0reactions

umang4846commented, Apr 2, 2019

setIndicatorColor(getResources().getColor(R.color.black),getResources().getColor(R.color.md_blue_grey_600;