java.lang.NullPointerException: Attempt to invoke virtual method 'java.io.File android.content.Context.getDir(java.lang.String, int)' on a null object reference

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Attempt to invoke virtual method 'java.io.File android.content.Context.getDir(java.lang.String, int)' on a null object reference

Stack trace

java.lang.NullPointerException: Attempt to invoke virtual method 'java.io.File android.content.Context.getDir(java.lang.String, int)' on a null object reference
	at app.job.alerts.utils.Utils.getCacheFile(Utils.java:257)
	at app.job.alerts.utils.Utils.saveCacheToSDCard(Utils.java:269)
	at app.job.alerts.fragments.LatestPostFragment$6.onResponse(LatestPostFragment.java:395)
	at app.job.alerts.fragments.LatestPostFragment$6.onResponse(LatestPostFragment.java:390)
	at com.android.volley.toolbox.JsonRequest.deliverResponse(JsonRequest.java:65)
	at com.android.volley.ExecutorDelivery$ResponseDeliveryRunnable.run(ExecutorDelivery.java:99)
	at android.os.Handler.handleCallback(Handler.java:739)
	at android.os.Handler.dispatchMessage(Handler.java:95)
	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)

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