Let's see a simple example to display a Toast Message in Android Programming. We have an Activity class called MainActivity.java and the corresponding layout XML file called activity_main.xml with a Button, on click of the button we display the Toast Message!

Display Toast on Button Click
activity_main.xml
<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
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.code2care.toast.MainActivity" >
<Button
android:id="@+id/click"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_centerHorizontal="true"
android:layout_centerVertical="true"
android:onClick="displayToast"
android:text="Display Toast" />
</RelativeLayout>
MainActivity.java
package com.code2care.toast;
/**
*
* This is a simple example to display a
* toast message in Android when a button
* is being pressed.
*
*/
import android.os.Bundle;
import android.support.v7.app.ActionBarActivity;
import android.view.Menu;
import android.view.View;
import android.widget.Toast;
public class MainActivity extends ActionBarActivity {
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
}
@Override
public boolean onCreateOptionsMenu(Menu menu) {
getMenuInflater().inflate(R.menu.main, menu);
return true;
}
//Display toast on button click
public void displayToast(View view) {
Toast.makeText(MainActivity.this, "Hello Toast Message!", Toast.LENGTH_LONG).show();
}
}
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