getAction Bar gives null pointer exception

Question

i want to work with action bar in android. for this i use

getActionBar().setHomeButtonEnabled(true);

below the SetContentView . but is gives me null pointer exception. when i try only getActionBar() it works fine.

please help me.

Silly question, but does your activity _have_ an ActionBar? If not, that'd explain it since that'd make `getActionBar()` return null. — Joachim Isaksson, Feb 14 '13 at 09:01

score 9 · Accepted Answer · answered Feb 14 '13 at 09:03

9

If your activity does not have a title bar the method getActionBar() can return null.

You have two options to fix this:

1- Add getWindow().requestFeature(Window.FEATURE_ACTION_BAR); before setContentView

2- In your Manifest specify a Theme that supports ActionBar

Also make sure that you are targeting the right android version e.g. <uses-sdk android:minSdkVersion="11" />

answered Feb 14 '13 at 09:03

iTech

getWindow().requestFeature(Window.FEATURE_ACTION_BAR); is works perfect. thanks a lot. – vivek tiwari Feb 14 '13 at 09:11
@vivektiwari but it is much better practice to apply a theme to your app android:Theme.Holo or android:Theme.Holo.Light. – Yaroslav Mytkalyk Feb 14 '13 at 09:15

score 0 · Answer 2 · edited Feb 14 '13 at 09:27

0

getActionBar() will return null for pre Honeycomb devices.

If you are targeting Android v2.3 to 4.2 try out ActionBarSherlock.

edited Feb 14 '13 at 09:27

Yaroslav Mytkalyk

answered Feb 14 '13 at 09:04

Kiran Kumar

2 Answers2