做安卓應(yīng)用開發(fā)的時候遇到一個奇怪的報錯，搜遍了網(wǎng)上都沒有，報錯代碼如下，希望后面遇到此問題的人可以快速定位問題

java.lang.RuntimeException: Unable to start activity ComponentInfo{com.xx/com.xx.mainpage.MainActivity}: java.lang.IllegalStateException: Activity com.xx.mainpage.MainActivity@f0f3ecc does not have an ActionBar set via setSupportActionBar()
        at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:3707)
        at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:3864)
        at android.app.servertransaction.LaunchActivityItem.execute(LaunchActivityItem.java:103)
        at android.app.servertransaction.TransactionExecutor.executeCallbacks(TransactionExecutor.java:135)
        at android.app.servertransaction.TransactionExecutor.execute(TransactionExecutor.java:95)
        at android.app.ActivityThread$H.handleMessage(ActivityThread.java:2253)
        at android.os.Handler.dispatchMessage(Handler.java:106)
        at android.os.Looper.loopOnce(Looper.java:201)
        at android.os.Looper.loop(Looper.java:288)
        at android.app.ActivityThread.main(ActivityThread.java:7886)
        at java.lang.reflect.Method.invoke(Native Method)
        at com.android.internal.os.RuntimeInit$MethodAndArgsCaller.run(RuntimeInit.java:548)
        at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:1035)
     Caused by: java.lang.IllegalStateException: Activity com.xx.mainpage.MainActivity@f0f3ecc does not have an ActionBar set via setSupportActionBar()
        at androidx.navigation.ui.ActionBarOnDestinationChangedListener.setTitle(ActionBarOnDestinationChangedListener.kt:40)
        at androidx.navigation.ui.AbstractAppBarOnDestinationChangedListener.onDestinationChanged(AbstractAppBarOnDestinationChangedListener.kt:87)
        at androidx.navigation.NavController.addOnDestinationChangedListener(NavController.kt:403)
        at androidx.navigation.ui.NavigationUI.setupActionBarWithNavController(NavigationUI.kt:284)
        at com.xx.mainpage.MainActivity.onCreate(MainActivity.java:36)
        at android.app.Activity.performCreate(Activity.java:8054)
        at android.app.Activity.performCreate(Activity.java:8034)
        at android.app.Instrumentation.callActivityOnCreate(Instrumentation.java:1341)
        at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:3688)
        at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:3864) 
        at android.app.servertransaction.LaunchActivityItem.execute(LaunchActivityItem.java:103) 
        at android.app.servertransaction.TransactionExecutor.executeCallbacks(TransactionExecutor.java:135) 
        at android.app.servertransaction.TransactionExecutor.execute(TransactionExecutor.java:95) 
        at android.app.ActivityThread$H.handleMessage(ActivityThread.java:2253) 
        at android.os.Handler.dispatchMessage(Handler.java:106) 
        at android.os.Looper.loopOnce(Looper.java:201) 
        at android.os.Looper.loop(Looper.java:288) 
        at android.app.ActivityThread.main(ActivityThread.java:7886) 
        at java.lang.reflect.Method.invoke(Native Method) 
        at com.android.internal.os.RuntimeInit$MethodAndArgsCaller.run(RuntimeInit.java:548) 
        at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:1035) 

問題鎖定在MainActivity中，后面發(fā)現(xiàn)注釋掉這句代碼就可以正常運(yùn)行了

supportRequestWindowFeature(Window.FEATURE_NO_TITLE);//去掉標(biāo)題

懷疑是此句代碼隱藏了標(biāo)題欄導(dǎo)致與setSupportActionBar()發(fā)生了沖突？文章來源地址http://www.zghlxwxcb.cn/news/detail-580296.html

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