How to schedule job immediately using JobScheduler

In this android programming source code example, we are going to schedule job immediately using JobScheduler.

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 job immediately using JobScheduler.

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.WorkManagerAndJobScheduleActivity15">

    <Button
        android:id="@+id/schedule"
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:background="@color/colorAccent"
        android:text="Schedule Job"
        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 android.app.job.JobInfo;
import android.app.job.JobScheduler;
import android.content.ComponentName;
import android.os.Bundle;
import android.view.View;
import android.widget.Button;
import android.widget.Toast;


public class WorkManagerAndJobScheduleActivity15 extends AppCompatActivity {
    private Button schedule;

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_work_manager_and_job_schedule15);
        schedule = (Button) findViewById(R.id.schedule);
        schedule.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View v) {
                startJob();
            }
        });
    }

    private void startJob(){
        ComponentName componentName = new ComponentName(this, JobScheduler15.class);
        JobInfo jobInfo = new JobInfo.Builder(13, componentName)
                .setRequiresCharging(true)
                .setMinimumLatency(1)
                .setOverrideDeadline(1)
                .build();
        JobScheduler jobScheduler = (JobScheduler)getSystemService(JOB_SCHEDULER_SERVICE);
        int resultCode = jobScheduler.schedule(jobInfo);
        if(resultCode == JobScheduler.RESULT_SUCCESS){
            Toast.makeText(WorkManagerAndJobScheduleActivity15.this, "Job Schedule",Toast.LENGTH_LONG).show();
        }else{
            Toast.makeText(WorkManagerAndJobScheduleActivity15.this, "Job Not Schedule",Toast.LENGTH_LONG).show();
        }

    }

}

JobScheduler15.java

import android.app.NotificationChannel;
import android.app.NotificationManager;
import android.app.job.JobParameters;
import android.app.job.JobService;
import android.content.Context;
import android.os.Build;

import androidx.core.app.NotificationCompat;


public class JobScheduler15 extends JobService {
    @Override
    public boolean onStartJob(JobParameters params) {
        try {
            Thread.sleep(5000);
        } catch (InterruptedException e) {
            e.printStackTrace();
        }
        showNotification("Inducesmile", "Job finished");
        return false;
    }

    @Override
    public boolean onStopJob(JobParameters params) {
        return false;
    }

    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());
    }
}

AndroidManifest.xml

<service
            android:name=".WorkManagerAndJobSchedule.JobScheduler15"
            android:permission="android.permission.BIND_JOB_SERVICE" />

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