How to schedule periodic task using Android WorkManager

In this android programming source code example, we are going to schedule periodic task using Android WorkManager.

You can copy and adopt this source code example to your android project without reinventing the wheel.

Below is a step by step source code to schedule periodic task using Android WorkManager.

activity_main.xml

<?xml version="1.0" encoding="utf-8"?>
<androidx.constraintlayout.widget.ConstraintLayout xmlns:android="http://schemas.android.com/apk/res/android"
    xmlns:app="http://schemas.android.com/apk/res-auto"
    xmlns:tools="http://schemas.android.com/tools"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    tools:context=".WorkManagerAndJobSchedule.WorkManagerAndJobScheduleActivity2">

    <Button
        android:id="@+id/schedule"
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:background="@color/colorAccent"
        android:text="Schedule Work"
        android:textAllCaps="false"
        android:textColor="#ffffff"
        android:textSize="19sp"
        android:layout_marginStart="10dp"
        android:layout_marginEnd="10dp"
        app:layout_constraintTop_toTopOf="parent"
        app:layout_constraintEnd_toEndOf="parent"
        app:layout_constraintStart_toStartOf="parent"
        app:layout_constraintBottom_toBottomOf="parent"/>

</androidx.constraintlayout.widget.ConstraintLayout>

MainActivity.java

import androidx.appcompat.app.AppCompatActivity;
import androidx.work.Constraints;
import androidx.work.NetworkType;
import androidx.work.PeriodicWorkRequest;
import androidx.work.WorkManager;

import android.os.Bundle;
import android.view.View;
import android.widget.Button;

import java.util.concurrent.TimeUnit;

public class WorkManagerAndJobScheduleActivity2 extends AppCompatActivity {
    private Button schedule;

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_work_manager_and_job_schedule2);
        schedule = (Button) findViewById(R.id.schedule);
        schedule.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View v) {
                startWork();
            }
        });
    }

    private void startWork(){
        Constraints constraints = new Constraints.Builder()
                .setRequiresBatteryNotLow(true)
                .setRequiresCharging(true)
                .setRequiredNetworkType(NetworkType.CONNECTED)
                .build();
        PeriodicWorkRequest periodicWorkRequest = new PeriodicWorkRequest.Builder(WorkManager2.class, 16, TimeUnit.MINUTES)
                .setConstraints(constraints).build();
        WorkManager.getInstance(this).enqueue(periodicWorkRequest);

    }
}

WorkManager2.java

import android.app.NotificationChannel;
import android.app.NotificationManager;
import android.content.Context;
import android.os.Build;

import androidx.annotation.NonNull;
import androidx.core.app.NotificationCompat;
import androidx.work.Worker;
import androidx.work.WorkerParameters;


public class WorkManager2 extends Worker {

    public WorkManager2(@NonNull Context context, @NonNull WorkerParameters workerParams) {
        super(context, workerParams);
    }

    @NonNull
    @Override
    public Result doWork() {
        showNotification("Inducesmile", "Hello world, work completed");
        return Result.success();
    }

    private void showNotification(String title, String task){
       NotificationManager notificationManager = (NotificationManager) getApplicationContext().getSystemService(Context.NOTIFICATION_SERVICE);
       if(Build.VERSION.SDK_INT >= android.os.Build.VERSION_CODES.O){
           NotificationChannel notificationChannel = new NotificationChannel("inducesmile", "inducesmile", NotificationManager.IMPORTANCE_DEFAULT);
           notificationManager.createNotificationChannel(notificationChannel);
       }
        NotificationCompat.Builder notification = new NotificationCompat.Builder(getApplicationContext(),"inducesmile")
                .setContentTitle(title)
                .setContentText(task)
                .setSmallIcon(R.mipmap.ic_launcher);
       notificationManager.notify(1, notification.build());
    }
}

app/build.gradle

implementation 'androidx.work:work-runtime:2.1.0-beta02'

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