Create an application that will display toast (Message) on specific interval of time.


MainActivity.java

package com.example.assignment8;

import androidx.appcompat.app.AppCompatActivity;

import android.os.Bundle;

import android.widget.Chronometer;

import android.widget.TextView;

import android.widget.Toast;

public class MainActivity extends AppCompatActivity {

    Chronometer c;

    int i = 0;

    int duration = 5;

    TextView tv;

    @Override

    protected void onCreate(Bundle savedInstanceState) {

        super.onCreate(savedInstanceState);

        setContentView(R.layout.activity_main);

        c = (Chronometer) findViewById(R.id.cnm);

        tv = (TextView) findViewById(R.id.tv);

        c.start();

        c.setOnChronometerTickListener(new Chronometer.OnChronometerTickListener() {

            @Override

            public void onChronometerTick(Chronometer chronometer) {

                tv.setText("Message will be displayed after " + (duration - (i + 1)) + " seconds");

                i++;

                if (i >= duration)

                {

                    Toast.makeText(getApplicationContext(),"Message"+(i/5),   Toast.LENGTH_LONG).show();

                    duration = duration+5;

                }

            }

        });

    }

}

activity_main.xml

<?xml version="1.0" encoding="utf-8"?>

<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"

    tools:context=".MainActivity">

    <TextView

        android:id="@+id/tv"

        android:layout_width="match_parent"

        android:layout_height="wrap_content"

        android:textAppearance="@android:style/TextAppearance.DeviceDefault.Medium"

        android:textColor="#0B0A0A"

        android:textSize="24sp" />

    <Chronometer

        android:id="@+id/cnm"

        android:layout_width="wrap_content"

        android:layout_height="wrap_content"

        android:layout_centerInParent="true"

        android:format="Timer : %s"

        android:textSize="24sp" />

</RelativeLayout>

Output

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