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via Stack Overflow by Akhil
, 1 year ago
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.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.AppCompatDelegateImplV7.setSupportActionBar(AppCompatDele gateImplV7.java:198)
                                                                        at  android.support.v7.app.AppCompatActivity.setSupportActionBar(AppCompatActivity.java:130)	at com.asoft.admin.anto_tab.MainActivity.onCreate(MainActivity.java:25)	at android.app.Activity.performCreate(Activity.java:6237)	at android.app.Instrumentation.callActivityOnCreate(Instrumentation.java:1107)	at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2369)