Blocking custom toast from package in Android

Question

NotificationService system_server W Blocking custom toast from package com.example.androidtest due to package not in the foreground at time the toast was posted Blockquote

When I try to show a custom Toast right after request for permission On Android >= 11, I got the above warning and the custom Toast won't show

private val requestPermissionLauncher = registerForActivityResult(
    ActivityResultContracts.RequestPermission()
) { isGranted: Boolean ->

}

override fun onCreate(savedInstanceState: Bundle?) {
    ...

    buttonCamera.setOnClickListener {
        requestPermissionLauncher.launch(android.Manifest.permission.CAMERA)
        makeCommonToast("ABc").show()
    }
}

private fun makeCustomToast(message: CharSequence): Toast {
    return Toast.makeText(context, "", Toast.LENGTH_LONG).apply {
        val rootView = LayoutInflater.from(context).inflate(R.layout.my_custom_toast, null)
        view = rootView
        val textView = rootView.findViewById<TextView>(R.id.text_message)
        textView.text = message
    }
}

I thought the app still in foreground but the Toast won't showing

score 0 · Answer 1 · answered Aug 01 '23 at 04:22

The above warning which I got is from NotificationManagerService#checkCanEnqueueToast

And, here is the **isPackageInForegroundForToast** function

There are many cases which will block the custom Toast showing, and in my above case, it because I show Toast behind a translucent Activity (which is Request Permission activity)

The solution for this can be

Not using custom Toast, use standard text toast
Show custom Toast later, when app in foreground

Blocking custom toast from package in Android

1 Answers1