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Solutions on the web

via Stack Overflow by nabia saroosh
, 1 year ago
Unable to start activity ComponentInfo{com.technerdshub.vusocial/com.technerdshub.vusocial.Activities.StudentDashboardActivity}: 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 Ник
, 1 year ago
Unable to start activity ComponentInfo{com.example.nikva.easyreading/com.example.nikva.easyreading.FileManager}: 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 Auro
, 1 year ago
Unable to start activity ComponentInfo{collegeproject.mvjce.edu.boat/collegeproject.mvjce.edu.boat.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 GitHub by waylife
, 2 years ago
Unable to start activity ComponentInfo{de.danoeh.antennapod/de.danoeh.antennapod.activity.MainActivity}: java.lang.IllegalStateException: This Activity already has an action bar supplied by the window decor. Do not request Window.FEATURE_ACTION_BAR and set windowActionBar to false in your theme to use a Toolbar instead.
via JIRA by alastair antonio, 1 year ago
Unable to start activity ComponentInfo{org.cyanogenmod.theme.chooser/org.cyanogenmod.theme.chooser.ChooserActivity}: java.lang.IllegalStateException: This Activity already has an action bar supplied by the window decor. Do not request Window.FEATURE_ACTION_BAR and set android:windowActionBar to false in your theme to use a Toolbar instead.
via google.com by Unknown author, 2 years ago
Unable to start activity ComponentInfo{org.cyanogenmod.theme.chooser/org.cyanogenmod.theme.chooser.ChooserActivity}: java.lang.IllegalStateException: This Activity already has an action bar supplied by the window decor. Do not request Window.FEATURE_ACTION_BAR and set android:windowActionBar to false in your theme to use a Toolbar instead.
java.lang.RuntimeException: Unable to start activity ComponentInfo{com.technerdshub.vusocial/com.technerdshub.vusocial.Activities.StudentDashboardActivity}: 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:2693)	at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:2758)	at android.app.ActivityThread.access$900(ActivityThread.java:177)	at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1448)	at android.os.Handler.dispatchMessage(Handler.java:102)	at android.os.Looper.loop(Looper.java:145)	at android.app.ActivityThread.main(ActivityThread.java:5942)	at java.lang.reflect.Method.invoke(Native Method)	at java.lang.reflect.Method.invoke(Method.java:372)