How to customize Toast background color when toast.view.background is null?

Question

Setting a color filter on the Toast's view's background seemed like the best approach. But toast.view.background is null so I get an NPE and the setColorFilter() method fails.

fun showToast(context: Context, text: String) {
    val toast = Toast.makeText(context, text, Toast.LENGTH_SHORT)

    // customize background color
    toast.view.background.setColorFilter(
        ContextCompat.getColor(context, R.color.toast_background),
        PorterDuff.Mode.SRC_IN
    )
    toast.show()
}

I also tried creating a custom drawable and setting toast.view.background to the drawable, but it shows my custom drawable behind the default Toast background.

view.background = ContextCompat.getDrawable(context, R.drawable.toast_background)

Answer 1

You can create custom layout file and inflate from that. This will give you flexibility on setting background and adding more widgets to view. In following sample, I set background color to red and text color to white but you can customize according to your needs.

1. Create toast_with_custom_view layout file and add following:

<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
    android:layout_width="wrap_content"
    android:layout_height="wrap_content"
    android:background="@android:color/holo_red_dark"
    android:orientation="vertical">

    <TextView
        android:id="@+id/textView"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:textColor="@android:color/white" />
</LinearLayout>

2. Inflate custom view using following code:

private fun showToast() {
    // inflate the custom layout
    val toastView = layoutInflater.inflate(R.layout.toast_with_custom_view, null)
    toastView.findViewById<TextView>(R.id.textView).text = "Hello, world!"

    val toast = Toast(applicationContext)
    // set custom view
    toast.view = toastView
    toast.show()
}