Toast not showing in Android Q

问题

Toast does not work in Android Q. Is there any change on Toast? I couldn't find any release note for Toast.
My code is simple.

override fun onCreate(savedInstanceState: Bundle?) {
    super.onCreate(savedInstanceState)
    setContentView(R.layout.activity_main)

    Toast.makeText(this, "onCreate", Toast.LENGTH_SHORT).show()
}

fun onButtonClick(view: View) {
    Toast.makeText(this, "onButtonClick", Toast.LENGTH_SHORT).show()
}

This works fine with Android Pie, but no luck with Android Q.
What happened to Toast??

回答1:

Rebooting device worked for me..

回答2:

As described in this Answer, make sure you haven't disabled notifications for the application. Go to App settings and see that notifications are enabled.

来源：https://stackoverflow.com/questions/56017928/toast-not-showing-in-android-q