NoSuchMethodError when using setNavigationBarDividerColor()?

Question

I was trying to create a divider between the navigation bar and my app content when they are the same colour, the way that Google has been doing it with their latest Material Design 2.0 updates to their apps like Google Contacts and Google Home. I tried to do it like this:

getWindow().setNavigationBarDividerColor(Color.GRAY);

However, I get a NoSuchMethodError when trying.

I am trying to find s a way to fix this or another way of putting a divider above the navigation bar.

Here is the stack:

10-16 20:33:47.257 30336-30336/? E/AndroidRuntime: FATAL EXCEPTION: main
        Process: com.diamonddevelopment.scholarly, PID: 30336
        java.lang.NoSuchMethodError: No virtual method setNavigationBarDividerColor(I)V in class Landroid/view/Window; or its super classes (declaration of 'android.view.Window' appears in /system/framework/framework.jar!classes2.dex)
            at com.diamonddevelopment.scholarly.base.BaseActivity.styleNavBar(BaseActivity.java:101)
            at com.diamonddevelopment.scholarly.base.BaseActivity.setToolbars(BaseActivity.java:78)
            at com.diamonddevelopment.scholarly.fragments.TimetableFragment.onCreateView(TimetableFragment.java:79)
            at androidx.fragment.app.Fragment.performCreateView(Fragment.java:2439)
            at androidx.fragment.app.FragmentManagerImpl.moveToState(FragmentManager.java:1460)
            at androidx.fragment.app.FragmentManagerImpl.moveFragmentToExpectedState(FragmentManager.java:1784)
            at androidx.fragment.app.FragmentManagerImpl.moveToState(FragmentManager.java:1852)
            at androidx.fragment.app.BackStackRecord.executeOps(BackStackRecord.java:802)
            at androidx.fragment.app.FragmentManagerImpl.executeOps(FragmentManager.java:2625)
            at androidx.fragment.app.FragmentManagerImpl.executeOpsTogether(FragmentManager.java:2411)
            at androidx.fragment.app.FragmentManagerImpl.removeRedundantOperationsAndExecute(FragmentManager.java:2366)
            at androidx.fragment.app.FragmentManagerImpl.execPendingActions(FragmentManager.java:2273)
            at androidx.fragment.app.FragmentManagerImpl.dispatchStateChange(FragmentManager.java:3273)
            at androidx.fragment.app.FragmentManagerImpl.dispatchActivityCreated(FragmentManager.java:3229)
            at androidx.fragment.app.FragmentController.dispatchActivityCreated(FragmentController.java:201)
            at androidx.fragment.app.FragmentActivity.onStart(FragmentActivity.java:620)
            at androidx.appcompat.app.AppCompatActivity.onStart(AppCompatActivity.java:178)
            at android.app.Instrumentation.callActivityOnStart(Instrumentation.java:1413)
            at android.app.Activity.performStart(Activity.java:7061)
            at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2874)
            at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:2989)
            at android.app.ActivityThread.-wrap11(Unknown Source:0)
            at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1688)
            at android.os.Handler.dispatchMessage(Handler.java:106)
            at android.os.Looper.loop(Looper.java:164)
            at android.app.ActivityThread.main(ActivityThread.java:6753)
            at java.lang.reflect.Method.invoke(Native Method)
            at com.android.internal.os.RuntimeInit$MethodAndArgsCaller.run(RuntimeInit.java:482)
            at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:807)

Answer 1

setNavigationBarDividerColor()

• Shows a thin line of the specified color between the navigation bar and the app content.

The setNavigationBarDividerColor() method was added in API level 28 so it will work only in API level 28 and above

You can not use setNavigationBarDividerColor() method below API level 28

When you use setNavigationBarDividerColor() you will get a Warning check below screenshot

SAMPLE CODE

 if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.P) {
     getWindow().setNavigationBarDividerColor(Color.GRAY)
  };