I get a "NullPointerException" when I'm trying to implement ListView Volley

Asked Sep 18 '16 at 11:51

Active Sep 18 '16 at 15:59

Viewed 24 times

I've tried to do everything as in this tutorial: but I don't know what is the problem there.

     Caused by: java.lang.NullPointerException: Attempt to invoke virtual method 'void android.app.ActionBar.setBackgroundDrawable(android.graphics.drawable.Drawable)' on a null object reference
            at info.androidhive.customlistviewvolley.MainActivity.onCreate(MainActivity.java:55)
            at android.app.Activity.performCreate(Activity.java:6185)

edited Sep 18 '16 at 15:59

Ali Bdeir

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asked Sep 18 '16 at 11:51

Almas

Initialize your ActionBar before setting it's background. – Anton Kazakov Sep 18 '16 at 12:10
What line is at your `onCreate()` method at MainActivity at line 55? To find out, go to the logcat where the crash happens, a line will contain `MainActivity.java:55` in blue, click there, it will take you to where the crash is – Ali Bdeir Sep 18 '16 at 12:59
@AbAppletic thanks, I just commented these lines and compiled again. My error was so ridiculous. Thank you for your response :) – Almas Sep 18 '16 at 13:40
@AntonKazakov thank you a lot – Almas Sep 18 '16 at 13:40
@Almas no problem :) – Anton Kazakov Sep 18 '16 at 13:50

I get a "NullPointerException" when I'm trying to implement ListView Volley

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