NullPointerException on actionBar.setDisplayShowTitleEnabled(boolean) in Api version 22

Question

I am using Actionbar in my App, it working fine below api 22.

using android.support.v4.app.FragmentActivity

use below code for Action bar

public void initActionBar() {
           actionBar = getActionBar();
           actionBar.setDisplayShowTitleEnabled(true);
           actionBar.setDisplayHomeAsUpEnabled(false);
           actionBar.setDisplayUseLogoEnabled(false);
           actionBar.setHomeButtonEnabled(true);
           actionBar.setTitle("Rides");
           actionBar.setIcon(R.drawable.menu);
           actionBar.setBackgroundDrawable(newColorDrawable(getResources().getColor(R.color.orange)));
           actionBar.setDisplayShowCustomEnabled(true);
}

App Theme in style.xml

<!-- Application theme. -->
<style name="AppTheme" parent="android:Theme.Holo.Light">
    <item name="android:activatedBackgroundIndicator">@drawable/list_activated_background</item>
    <item name="android:typeface">serif</item>
    <item name="android:actionBarSize">55dip</item>
</style>

When run same In version 22 get below error

LogCat Error

Caused by: java.lang.NullPointerException: Attempt to invoke virtual method 'void android.app.ActionBar.setDisplayShowTitleEnabled(boolean)' on a null object reference at com.holachef.android.chef_android.activity.HomeActivity.initActionBar(HomeActivity.java:160) at com.holachef.android.chef_android.activity.HomeActivity.onCreate(HomeActivity.java:62) at android.app.Activity.performCreate(Activity.java:5953) at android.app.Instrumentation.callActivityOnCreate(Instrumentation.java:1128) at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2267) at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:2388) at android.app.ActivityThread.access$800(ActivityThread.java:148) at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1292) at android.os.Handler.dispatchMessage(Handler.java:102) at android.os.Looper.loop(Looper.java:135)

use android studio for this, same code in eclips run successfully on version 22, Is issue related with android studio.

Any help will be appreciated. Thanks.

Which activity are you using? Activity? ActionBarActivity? or AppCompatActivity? — capt.swag, Aug 13 '15 at 06:27

capt.swag · Answer 1 · 2015-08-13T07:09:31.523

1

You must extend AppCompatActivity instead of FragmentActivity to have Actionbar with fragments.

If you're using the v7 appcompat library, your activity should instead extend AppCompatActivity, which is a subclass of FragmentActivity (for more information, read Adding the Action Bar).

Still you can try this,

ActionBar actionBar = getSupportActionBar();

More detail you can found here. http://developer.android.com/training/basics/fragments/creating.html

And please switch to Material Theme rather than using the old Holo Theme.

edited Aug 13 '15 at 07:09

answered Aug 13 '15 at 06:41

capt.swag

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friend ActionBarActivity is deprecated so its not good idea to use it. see http://stackoverflow.com/questions/29890530/actionbaractivity-is-deprecated-android-studio – Lokesh Aug 13 '15 at 07:07
Use AppCompatActivity instead. – capt.swag Aug 13 '15 at 07:07
@OP if my solution, solved your issue, then you should mark this as solved. – capt.swag Aug 13 '15 at 13:56

score 0 · Answer 2 · answered Nov 07 '15 at 18:57

0

For Android Studio, the support libraries are all handled by Gradle now. So go to this file:

Now pay attention to the parts I highlighted in red. Try playing around withe the "minSdkVersion" and rebuild gradle.

answered Nov 07 '15 at 18:57

Gene

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NullPointerException on actionBar.setDisplayShowTitleEnabled(boolean) in Api version 22

2 Answers2