Android Studio: App branché après l'écran des éclaboussures

Mon application se bloque après un écran Splash, j'ai essayé de mettre en œuvre. Je ne sais pas où se produit le problème.

J'ai essayé de résoudre ce problème comme 2 heures et même de rechercher le Web mais je ne le fais pas pour travailler. Peut-être que vous pouvez regarder par-dessus le code et me donner des indices? J'apprécierais que. P>

androidmanifest.xml p> xxx pré>

launch_screen.xml p> xxx pré>

Activity_main. xml p> xxx pré>

styles.xml p> xxx pré>

maintacivit.java p> xxx pré> SO..L'ÉGRAPILLE DE SPLASH EXTÉAL est affiché, mais après cela, l'application se bloque. Je ne comprends pas pourquoi: / p>

Edit: (Crashlog) P>

2019-03-25 21:06:18.588 14651-14651/com.example.noctis E/AndroidRuntime: FATAL EXCEPTION: main
    Process: com.example.noctis, PID: 14651
    java.lang.RuntimeException: Unable to start activity ComponentInfo{com.example.noctis/com.example.noctis.MainActivity}: java.lang.IllegalStateException: This Activity already has an action bar supplied by the window decor. Do not request Window.FEATURE_SUPPORT_ACTION_BAR and set windowActionBar to false in your theme to use a Toolbar instead.
        at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:3107)
        at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:3250)
        at android.app.servertransaction.LaunchActivityItem.execute(LaunchActivityItem.java:78)
        at android.app.servertransaction.TransactionExecutor.executeCallbacks(TransactionExecutor.java:108)
        at android.app.servertransaction.TransactionExecutor.execute(TransactionExecutor.java:68)
        at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1947)
        at android.os.Handler.dispatchMessage(Handler.java:106)
        at android.os.Looper.loop(Looper.java:214)
        at android.app.ActivityThread.main(ActivityThread.java:7032)
        at java.lang.reflect.Method.invoke(Native Method)
        at com.android.internal.os.RuntimeInit$MethodAndArgsCaller.run(RuntimeInit.java:493)
        at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:964)
     Caused by: java.lang.IllegalStateException: This Activity already has an action bar supplied by the window decor. Do not request Window.FEATURE_SUPPORT_ACTION_BAR and set windowActionBar to false in your theme to use a Toolbar instead.
        at android.support.v7.app.AppCompatDelegateImpl.setSupportActionBar(AppCompatDelegateImpl.java:345)
        at android.support.v7.app.AppCompatActivity.setSupportActionBar(AppCompatActivity.java:130)
        at com.example.noctis.MainActivity.onCreate(MainActivity.java:21)
        at android.app.Activity.performCreate(Activity.java:7327)
        at android.app.Activity.performCreate(Activity.java:7318)
        at android.app.Instrumentation.callActivityOnCreate(Instrumentation.java:1271)
        at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:3087)
        at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:3250) 
        at android.app.servertransaction.LaunchActivityItem.execute(LaunchActivityItem.java:78) 
        at android.app.servertransaction.TransactionExecutor.executeCallbacks(TransactionExecutor.java:108) 
        at android.app.servertransaction.TransactionExecutor.execute(TransactionExecutor.java:68) 
        at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1947) 
        at android.os.Handler.dispatchMessage(Handler.java:106) 
        at android.os.Looper.loop(Looper.java:214) 
        at android.app.ActivityThread.main(ActivityThread.java:7032) 
        at java.lang.reflect.Method.invoke(Native Method) 
        at com.android.internal.os.RuntimeInit$MethodAndArgsCaller.run(RuntimeInit.java:493) 
        at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:964) 
2019-03-25 21:06:18.599 14651-14651/com.example.noctis I/Process: Sending signal. PID: 14651 SIG: 9