Android Toast in Kotlin

A Toast in Android provides simple feedback in a small popup. It is used to display short-lived messages to the user. Toasts are shown on the UI thread, and they are automatically dismissed after a certain period.

Here's how you can create and display a Toast in Kotlin:

Using the Default Toast Lengths:

There are two default durations you can use with a Toast: Toast.LENGTH_SHORT and Toast.LENGTH_LONG.

Toast.makeText(this, "Short Toast Message", Toast.LENGTH_SHORT).show()
Toast.makeText(this, "Long Toast Message", Toast.LENGTH_LONG).show()

Custom Toast with Custom View:

You can create a custom layout for a Toast, giving you more control over its appearance.

First, create an XML layout for the Toast:

res/layout/custom_toast.xml:

<?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:orientation="horizontal"
    android:padding="8dp"
    android:background="@android:color/holo_blue_dark">

    <ImageView
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:src="@android:drawable/ic_dialog_info" />

    <TextView
        android:id="@+id/customToastText"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:textColor="@android:color/white"
        android:padding="8dp"
        android:text="Custom Toast" />

</LinearLayout>

Use this layout in Kotlin:

val layoutInflater = LayoutInflater.from(this)
val customToastRoot = layoutInflater.inflate(R.layout.custom_toast, null)
val customToastText: TextView = customToastRoot.findViewById(R.id.customToastText)
customToastText.text = "This is a custom toast message."

val customToast = Toast(this)
customToast.view = customToastRoot
customToast.duration = Toast.LENGTH_LONG
customToast.show()

Gravity and Position:

You can also set the position of the Toast using setGravity:

val toast = Toast.makeText(this, "Toast at Top", Toast.LENGTH_SHORT)
toast.setGravity(Gravity.TOP, 0, 0)
toast.show()

In this example, the Toast will appear at the top of the screen. The two zero values after Gravity.TOP are the x-offset and y-offset from the specified gravity.

When using Toasts, make sure they don't disrupt the user experience. Use them judiciously for short, non-critical messages. For critical notifications, consider using a Snackbar or other UI elements.

Using Toast messages in Android with Kotlin:

Toast.makeText(applicationContext, "Hello, Toast!", Toast.LENGTH_SHORT).show()

Creating custom Toast in Android using Kotlin:

val inflater: LayoutInflater = layoutInflater
val layout: View = inflater.inflate(R.layout.custom_toast_layout, findViewById(R.id.custom_toast_container))

val toast = Toast(applicationContext)
toast.setGravity(Gravity.CENTER_VERTICAL, 0, 0)
toast.duration = Toast.LENGTH_SHORT
toast.view = layout
toast.show()

Positioning Toast messages in Android Kotlin:

toast.setGravity(Gravity.TOP or Gravity.START, 0, 0)

Changing Toast background color in Kotlin:

val toast = Toast.makeText(applicationContext, "Custom Background Color", Toast.LENGTH_SHORT)
val view = toast.view
view.setBackgroundColor(Color.RED)
toast.show()

Styling Toast text in Android with Kotlin:

val toast = Toast.makeText(applicationContext, "Styled Text", Toast.LENGTH_SHORT)
val view = toast.view
val textView = view.findViewById<TextView>(android.R.id.message)
textView.setTextColor(Color.WHITE)
textView.setTextSize(TypedValue.COMPLEX_UNIT_SP, 18f)
toast.show()

Long and short duration Toast in Kotlin:

Toast.makeText(applicationContext, "Short Duration", Toast.LENGTH_SHORT).show()
Toast.makeText(applicationContext, "Long Duration", Toast.LENGTH_LONG).show()