App Crashes after chaning Theme to "NoActionBar"

Question

Hi I have to change my App theme to "Theme.AppCompat.Light.NoActionBar". But after I changed it, the app crashes. I could not find out where the problem is :/

My goal is to expand my Navigation Drawer over the toolbar. But for that, I need the "NoActionBar" function. I hope someone can help me out. Thanks forwards!

That is the error code from the debugger:

12-23 11:04:28.292 1410-1421/? E/ANDR-PERF-LOCK: Failed to apply optimization for resource: 4 level: 0

That is my styles.xml code:

<resources>
    <!-- Base application theme. -->
    <style name="AppTheme" parent="Theme.AppCompat.Light.NoActionBar">
        <!-- Customize your theme here. -->
        <item name="colorPrimary">@color/colorPrimary</item>
        <item name="colorPrimaryDark">@color/colorPrimaryDark</item>
        <item name="colorAccent">@color/colorAccent</item>

        <item name="android:listDivider">@android:color/transparent</item>
    </style>

    <style name="AppTheme.NoActionBar">
        <item name="windowActionBar">false</item>
        <item name="windowNoTitle">true</item>
    </style>

    <style name="AppTheme.AppBarOverlay" parent="ThemeOverlay.AppCompat.Dark.ActionBar" />

    <style name="AppTheme.PopupOverlay" parent="ThemeOverlay.AppCompat.Light" />

</resources>

@Tej Where I can read it out? Sry but Iam new on Android Studio :( — Sinan Kara, Dec 23 '17 at 10:00
there is a Logcat menu at the bottom of android studio . Open it , you will find your error there — Tejas Pandya, Dec 23 '17 at 10:02
They are written when you Run or debug the app! There are Tabs at the Bottom! @SinanKara — Xenolion, Dec 23 '17 at 10:02
Check this question: https://stackoverflow.com/questions/36478925/why-is-apptheme-noactionbar-not-working — Salman Naseem, Dec 23 '17 at 10:09
My code was too long for the question. I posted it as an answer — Sinan Kara, Dec 23 '17 at 11:29

Abubakker Moallim · Answer 1 · 2017-12-23T11:03:47.207

3

Focusing on your style

  <style name="AppTheme" parent="Theme.AppCompat.Light.NoActionBar">

This theme Theme.AppCompat.Light.NoActionBar means you are telling android not to take default ActionBar

and than Later you are calling ActionBar in your MainAcitvity which is the cause for your crash.

Instead use Toolbar and set as ActionBar :

Toolbar toolbar = (Toolbar) findViewById(R.id.toolbar);

setSupportActionBar(toolbar);

getSupportActionBar().setDisplayHomeAsUpEnabled(true);
getSupportActionBar().setHomeButtonEnabled(true);

Also I think you are using lolipop so add this in your styles.xml :

<style name="AppTheme.NoActionBar">
        <item name="windowActionBar">false</item>
        <item name="windowNoTitle">true</item>
</style>

And in your manifest :

<activity android:name=".activity.YourActivity"
          android:theme="@style/AppTheme.NoActionBar"><!-- ADD THIS LINE -->

edited Dec 23 '17 at 11:03

answered Dec 23 '17 at 10:39

Abubakker Moallim

1,610
10
20

I tried it out, but than it crashed again with that error code : E/AndroidRuntime: FATAL EXCEPTION: main – Sinan Kara Dec 23 '17 at 10:44
And this is not the error log you should post. Post whole exception – Abubakker Moallim Dec 23 '17 at 10:45
https://stackoverflow.com/questions/44494458/how-to-fix-java-lang-classcastexception-android see this link and learn how to post error log – Abubakker Moallim Dec 23 '17 at 10:46
Sry iam new on android studio :/ But I cant post the error code because its too long – Sinan Kara Dec 23 '17 at 10:52
I wrote an answer where I have put in the main activity and the error code – Sinan Kara Dec 23 '17 at 10:57
No, Sadly it did not – Sinan Kara Dec 23 '17 at 11:32
Still crashing ? – Abubakker Moallim Dec 23 '17 at 12:25
Jap, I try to fix it since thursday xD But I still couldn't find the problem :/ – Sinan Kara Dec 23 '17 at 15:34

CENSOR_1337 · Answer 2 · 2021-04-27T01:53:58.533

3

1.Go to MainActivity.java file
2.Comment this line of code
//NavigationUI.setupActionBarWithNavController(this, navController, appBarConfiguration);
3.crash should be fixed

Reason why You're using "Bottom Navigation Activity", the reason it crashing because java tries to get the object from Actionbar, When the Actionbar is disabled it returns null cause we don't have an action bar, To fix this you need to comment or remove code out if you go to MainActivity.java (in case you're using java) you will see this code on line 26 and it tries to get set up the action bar. we can comment the code out and it should work fine.

Sorry for my bad English.

NavigationUI.setupActionBarWithNavController(this, navController, appBarConfiguration);

edited Apr 27 '21 at 01:53

answered Apr 26 '21 at 16:19

CENSOR_1337

31
1
3

It solves the crash problem but the Bottom Navigation doesn't work. Any solutions for making it work with the navigation without the `ActionBar`? – Joshua Jun 02 '21 at 21:11
1

NavigationUI.setupWithNavController(binding.bottomNavView, navController); – Andrea Oct 12 '21 at 12:21

score 0 · Answer 3 · edited Dec 10 '21 at 16:45

The solution is easy, there are two ways to change your actionBar:

You could change under src/main/AndroidManifest.xml:

android:theme="@style/Theme.AppCompat.DayNight.NoActionBar"

which will cause crash.

You could also change it under src/main/res/values/themes.xml:

If you change it such as:

<style name="Theme.MyQuizApp"
parent="Theme.MaterialComponents.DayNight.NoActionBar">

It should solve the problem.

App Crashes after chaning Theme to "NoActionBar"

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