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How to display Toast on Button Click : Android



Lesson for Android Programming Beginners :

Lets have a look at how we can display a Toast message when a button is being clicked.

Step 1 : Create Button


    In your layout.xml file create a button view and set the attribute : android:onClick = "displayToastMsg"

        xmlns:tools="http://schemas.android.com/tools"
        android:layout_width="match_parent"
        android:layout_height="match_parent"
        android:paddingBottom="@dimen/activity_vertical_margin"
        android:paddingLeft="@dimen/activity_horizontal_margin"
        android:paddingRight="@dimen/activity_horizontal_margin"
        android:paddingTop="@dimen/activity_vertical_margin"
        tools:context="com.example.toastexample.MainActivity" >





Step 2 : Create Toast Method


    Now lets create a method that displays a Toast message when the button is being clicked. Let the method takes in one parameter i.e. the Message to be displayed as String.


public void toastMsg(String msg) {

    Toast toast = Toast.makeText(this, msg, Toast.LENGTH_LONG);
    toast.show();

}




Step 3 : Create Button Click Listener Method


    Now lets implement Button click Listener that will be called when the button is clicked. We call the toastMsg() function to display the Toast Message.


public void displayToastMsg(View v) {

    toastMsg("Hello how are you today!!");

}


Step 4 : Run the App :


Display Toast Message on Button Click


Now every time the button will be clicked this toast message will be displayed.









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