java.lang.RuntimeException: Unable to start activity ComponentInfo{com.example.jorgenajera.myapplication/com.mikepenz.aboutlibraries.ui.LibsActivity}: 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.

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via GitHub by NajeraP95
, 9 months ago
Unable to start activity ComponentInfo{com.example.jorgenajera.myapplication/com.mikepenz.aboutlibraries.ui.LibsActivity}: 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.
via Stack Overflow by Shayan D
, 1 year ago
Unable to start activity ComponentInfo{com.shahinsoft.snote/com.shahinsoft.snote.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.
via Stack Overflow by noopur tanwar
, 1 year ago
Unable to start activity ComponentInfo{com.example.android.mymovieapp/com.example.android.mymovieapp.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.
via Stack Overflow by Prem
, 1 year ago
Unable to start activity ComponentInfo{com.example.android.buyhatke/com.example.android.buyhatke.HomeActivity}: 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.
via Stack Overflow by Amey Parab
, 4 months ago
Unable to start activity ComponentInfo{com.delaroystudios.database/com.delaroystudios.database.Teacher}: 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.
via Stack Overflow by varun pandey
, 4 months ago
Unable to start activity ComponentInfo{coml.example.pandey.firebasedatabase/coml.example.pandey.firebasedatabase.LoginActivity}: 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.
java.lang.RuntimeException: Unable to start activity ComponentInfo{com.example.jorgenajera.myapplication/com.mikepenz.aboutlibraries.ui.LibsActivity}: 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:2450)

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