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Android Build a Simple Android App (2014) Creating the Screen Layout Using a Fullscreen Theme

Thamood Binmahfooz
Thamood Binmahfooz
3,283 Points
Posted by Thamood Binmahfooz
Thamood Binmahfooz
3,283 Points

app keeps crashing on the emulator after changing the theme

after i changed the theme to:

<style name="AppTheme" parent="android:Theme.Holo.Light.NoActionBar">

and running it on the emulator i kept getting this runtime error:

You need to use a Theme.AppCompat theme (or descendant) with this activity.

after looking around i found this on stack overflow:

http://stackoverflow.com/questions/21814825/you-need-to-use-a-theme-appcompat-theme-or-descendant-with-this-activity

so i changed the the Java file to extends the Activity class instead of the ActionBarActivity class and all went well.

i don't know if what i did was correct.

I'm using Android Studio 1.0.2 on a Mac

4 Answers

Joshua Mossop
Joshua Mossop
885 Points
Joshua Mossop
Joshua Mossop
885 Points

Easy fix, I ran into the same problem just now and decided I better share the solution. ^_^

Inside AndroidManifest.xml there is a line that says android:theme this is just calling a style from your styles.xml. So if we open up this file and change the theme to look like the following everything should work splendidly.

<style name="AppTheme" parent="Theme.AppCompat.Light.NoActionBar">
Ivan Nemchenko
Ivan Nemchenko
6,623 Points

Thank you dear Sir! Worked like charm.

Miguel Sousa
Miguel Sousa
6,872 Points
Miguel Sousa
Miguel Sousa
6,872 Points

It worked with me!

Thomas Cullen
Thomas Cullen
8,433 Points

Yep this worked, Great stuff.

Tiffany Hsieh
Tiffany Hsieh
201 Points
Tiffany Hsieh
Tiffany Hsieh
201 Points

I tried this as well as all the suggested tips in the forum but it still doesn't work. It "runs" without errors but when it shows up on the emulator or my phone it immediately crashes

Charles Herrera
Charles Herrera
3,292 Points
Charles Herrera
Charles Herrera
3,292 Points

I had the same issue

I had to change the java to public class FunFactsActivity extends android.app.Activity

It would be nice to get someone from Treehouse to address what is going on here

Rex Wang
Rex Wang
2,089 Points
Rex Wang
Rex Wang
2,089 Points

I changed mine to AppCompatActivity as recommended by this S.O. post

kaizen rework
kaizen rework
810 Points
kaizen rework
kaizen rework
810 Points

<style name="AppTheme" parent="Theme.AppCompat.Light.NoActionBar"> -- this worked for me :)

thank you