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

Elle Inad
Elle Inad
568 Points

Unfortunately, Fun Facts has stopped.

Unfortunately, the Fun Facts app didn't load in the emulator.

Below are the error messages received: The cause may be indicated by this statement in the list below ? ** Caused by: java.lang.IllegalStateException: You need to use a Theme.AppCompat theme (or descendant) with this activity.**

08-02 13:46:59.194 6023-6023/? I/art﹕ Not late-enabling -Xcheck:jni (already on) 08-02 13:47:01.174 6023-6030/com.dariusus.funfacts W/art﹕ Suspending all threads took: 47.476ms 08-02 13:47:01.529 6023-6023/com.dariusus.funfacts D/AndroidRuntime﹕ Shutting down VM 08-02 13:47:01.592 6023-6030/com.dariusus.funfacts W/art﹕ Suspending all threads took: 24.464ms 08-02 13:47:01.610 6023-6023/com.dariusus.funfacts E/AndroidRuntime﹕ FATAL EXCEPTION: main Process: com.dariusus.funfacts, PID: 6023 java.lang.RuntimeException: Unable to start activity ComponentInfo{com.dariusus.funfacts/com.dariusus.funfacts.FunFactsActivity}: java.lang.IllegalStateException: You need to use a Theme.AppCompat theme (or descendant) with this activity. at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2325) at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:2390) at android.app.ActivityThread.access$800(ActivityThread.java:151) at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1303) at android.os.Handler.dispatchMessage(Handler.java:102) at android.os.Looper.loop(Looper.java:135) at android.app.ActivityThread.main(ActivityThread.java:5257) at java.lang.reflect.Method.invoke(Native Method) at java.lang.reflect.Method.invoke(Method.java:372) at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:903) at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:698) Caused by: java.lang.IllegalStateException: You need to use a Theme.AppCompat theme (or descendant) with this activity. at android.support.v7.app.AppCompatDelegateImplBase.onCreate(AppCompatDelegateImplBase.java:124) at android.support.v7.app.AppCompatDelegateImplV7.onCreate(AppCompatDelegateImplV7.java:146) at android.support.v7.app.AppCompatActivity.onCreate(AppCompatActivity.java:59) at com.dariusus.funfacts.FunFactsActivity.onCreate(FunFactsActivity.java:13) at android.app.Activity.performCreate(Activity.java:5990) at android.app.Instrumentation.callActivityOnCreate(Instrumentation.java:1106) at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2278)             at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:2390)             at android.app.ActivityThread.access$800(ActivityThread.java:151)             at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1303)             at android.os.Handler.dispatchMessage(Handler.java:102)             at android.os.Looper.loop(Looper.java:135)             at android.app.ActivityThread.main(ActivityThread.java:5257)             at java.lang.reflect.Method.invoke(Native Method)             at java.lang.reflect.Method.invoke(Method.java:372)             at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:903)             at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:698)

Elle Inad
Elle Inad
568 Points

Solution found here https://teamtreehouse.com/forum/you-need-to-use-a-themeappcompat-theme-or-descendent-crystal-ball-crashes

Just go into styles.xml and change the AppTheme back to Theme.AppCompat.Light

Problem solved.

1 Answer

Costin-Alexandru Zaharia
Costin-Alexandru Zaharia
1,509 Points

I have the same problem. changing to "Theme.AppCompat.Light" does resolve it but why can't I change the theme?