منبه

import android.content.BroadcastReceiver;
import android.content.Context;
import android.content.Intent;
import android.util.Log;


public class AlarmReceiver extends BroadcastReceiver {

    @Override    public void onReceive(Context context, Intent intent) {
        String state = intent.getExtras().getString("extra");
        Log.e("MyActivity", "In the receiver with " + state);

        Intent serviceIntent = new Intent(context,RingtonePlayingService.class);
        serviceIntent.putExtra("extra", state);

        context.startService(serviceIntent);
    }
}

import android.app.Notification;
import android.app.NotificationManager;
import android.app.PendingIntent;
import android.app.Service;
import android.content.Context;
import android.content.Intent;
import android.media.MediaPlayer;
import android.os.Build;
import android.os.IBinder;
import android.support.annotation.Nullable;
import android.support.annotation.RequiresApi;
import android.util.Log;

import java.util.Random;

public class RingtonePlayingService extends Service {

    private boolean isRunning;
    private Context context;
    MediaPlayer mMediaPlayer;
    private int startId;


    @Nullable    @Override    public IBinder onBind(Intent intent) {
        Log.e("MyActivity", "In the Richard service");
        return null;
    }


    @RequiresApi(api = Build.VERSION_CODES.JELLY_BEAN)
    @Override    public int onStartCommand(Intent intent, int flags, int startId)
    {

        final NotificationManager mNM = (NotificationManager)
                getSystemService(NOTIFICATION_SERVICE);

        Intent intent1 = new Intent(this.getApplicationContext(), Mainalarm.class);
        PendingIntent pIntent = PendingIntent.getActivity(this, 0, intent1, 0);

        Notification mNotify  = new Notification.Builder(this)
                .setContentTitle("Richard Dawkins is talking" + "!")
                .setContentText("Click me!")
                .setSmallIcon(R.drawable.ic_action_call)
                .setContentIntent(pIntent)
                .setAutoCancel(true)
                .build();

        String state = intent.getExtras().getString("extra");

        Log.e("what is going on here  ", state);

        assert state != null;
        switch (state) {
            case "no":
                startId = 0;
                break;
            case "yes":
                startId = 1;
                break;
            default:
                startId = 0;
                break;
        }


        if(!this.isRunning && startId == 1) {
            Log.e("if there was not sound ", " and you want start");

            int min = 1;
            int max = 9;

            Random r = new Random();
            int random_number = r.nextInt(max - min + 1) + min;
            Log.e("random number is ", String.valueOf(random_number));

            if (random_number == 1) {
                mMediaPlayer = MediaPlayer.create(this, R.raw.richard_dawkins_1);
            }
            else if (random_number == 2) {
                mMediaPlayer = MediaPlayer.create(this, R.raw.richard_dawkins_2);
            }
            else if (random_number == 3) {
                mMediaPlayer = MediaPlayer.create(this, R.raw.richard_dawkins_3);
            }
            else if (random_number == 4) {
                mMediaPlayer = MediaPlayer.create(this, R.raw.richard_dawkins_4);
            }
            else if (random_number == 5) {
                mMediaPlayer = MediaPlayer.create(this, R.raw.richard_dawkins_5);
            }
            else if (random_number == 6) {
                mMediaPlayer = MediaPlayer.create(this, R.raw.richard_dawkins_6);
            }
            else if (random_number == 7) {
                mMediaPlayer = MediaPlayer.create(this, R.raw.richard_dawkins_7);
            }
            else if (random_number == 8) {
                mMediaPlayer = MediaPlayer.create(this, R.raw.richard_dawkins_8);
            }
            else if (random_number == 9) {
                mMediaPlayer = MediaPlayer.create(this, R.raw.richard_dawkins_9);
            }
            else {
                mMediaPlayer = MediaPlayer.create(this, R.raw.richard_dawkins_1);
            }
            //mMediaPlayer = MediaPlayer.create(this, R.raw.richard_dawkins_1);
            mMediaPlayer.start();


            mNM.notify(0, mNotify);

            this.isRunning = true;
            this.startId = 0;

        }
        else if (!this.isRunning && startId == 0){
            Log.e("if there was not sound ", " and you want end");

            this.isRunning = false;
            this.startId = 0;

        }

        else if (this.isRunning && startId == 1){
            Log.e("if there is sound ", " and you want start");

            this.isRunning = true;
            this.startId = 0;

        }
        else {
            Log.e("if there is sound ", " and you want end");

            mMediaPlayer.stop();
            mMediaPlayer.reset();

            this.isRunning = false;
            this.startId = 0;
        }


        Log.e("MyActivity", "In the service");

        return START_NOT_STICKY;

    }


    @Override    public void onDestroy() {
        Log.e("JSLog", "on destroy called");
        super.onDestroy();

        this.isRunning = false;
    }






import android.annotation.TargetApi;
import android.app.AlarmManager;
import android.app.PendingIntent;
import android.content.Context;
import android.content.Intent;
import android.os.Build;
import android.support.v7.app.AppCompatActivity;
import android.os.Bundle;
import android.util.Log;
import android.view.View;
import android.widget.Button;
import android.widget.TextView;
import android.widget.TimePicker;

import java.util.Calendar;
import java.util.Random;

public class Mainalarm extends AppCompatActivity {

    AlarmManager alarmManager;
    private PendingIntent pending_intent;

    private TimePicker alarmTimePicker;
    private TextView alarmTextView;

    private AlarmReceiver alarm;


    Mainalarm inst;
    Context context;

    @Override    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.mainalarm);



        this.context = this;

        //alarm = new AlarmReceiver();        alarmTextView = (TextView) findViewById(R.id.alarmText);

        final Intent myIntent = new Intent(this.context, AlarmReceiver.class);

        // Get the alarm manager service        alarmManager = (AlarmManager) getSystemService(ALARM_SERVICE);

        // set the alarm to the time that you picked        final Calendar calendar = Calendar.getInstance();

        alarmTimePicker = (TimePicker) findViewById(R.id.alarmTimePicker);



        Button start_alarm= (Button) findViewById(R.id.start_alarm);
        start_alarm.setOnClickListener(new View.OnClickListener() {
            @TargetApi(Build.VERSION_CODES.M)

            @Override            public void onClick(View v) {

                calendar.add(Calendar.SECOND, 3);
                //setAlarmText("You clicked a button");
                final int hour = alarmTimePicker.getCurrentHour();
                final int minute = alarmTimePicker.getCurrentMinute();;

                Log.e("MyActivity", "In the receiver with " + hour + " and " + minute);
                setAlarmText("You clicked a " + hour + " and " + minute);


                calendar.set(Calendar.HOUR_OF_DAY, alarmTimePicker.getCurrentHour());
                calendar.set(Calendar.MINUTE, alarmTimePicker.getCurrentMinute());

                myIntent.putExtra("extra", "yes");
                pending_intent = PendingIntent.getBroadcast(Mainalarm.this, 0, myIntent, PendingIntent.FLAG_UPDATE_CURRENT);

                alarmManager.set(AlarmManager.RTC_WAKEUP, calendar.getTimeInMillis(), pending_intent);


                // now you should change the set Alarm text so it says something nice

                setAlarmText("Alarm set to " + hour + ":" + minute);
                //Toast.makeText(getApplicationContext(), "You set the alarm", Toast.LENGTH_SHORT).show();            }

        });

        Button stop_alarm= (Button) findViewById(R.id.stop_alarm);
        stop_alarm.setOnClickListener(new View.OnClickListener() {
            @Override            public void onClick(View v) {


                int min = 1;
                int max = 9;

                Random r = new Random();
                int random_number = r.nextInt(max - min + 1) + min;
                Log.e("random number is ", String.valueOf(random_number));

                myIntent.putExtra("extra", "no");
                sendBroadcast(myIntent);

                alarmManager.cancel(pending_intent);
                setAlarmText("Alarm canceled");
                //setAlarmText("You clicked a " + " canceled");            }
        });

    }

    public void setAlarmText(String alarmText) {
        alarmTextView.setText(alarmText);
    }



    @Override    public void onStart() {
        super.onStart();
        inst = this;
    }

    @Override    public void onDestroy() {
        super.onDestroy();

        Log.e("MyActivity", "on Destroy");
    }


}


}



  <application        android:allowBackup="true"        android:icon="@mipmap/ic_launcher"        android:label="@string/app_name"        android:roundIcon="@mipmap/ic_launcher_round"        android:supportsRtl="true"        android:theme="@style/AppTheme">
        <activity android:name=".Mainalarm">
            <intent-filter>
                <action android:name="android.intent.action.MAIN" />

                <category android:name="android.intent.category.LAUNCHER" />
            </intent-filter>
        </activity>


        <receiver android:name=".AlarmReceiver" />

        <service android:name=".RingtonePlayingService"            android:enabled="true">
        </service>

    </application>

</manifest>



<?xml version="1.0" encoding="utf-8"?><android.support.constraint.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=".Mainalarm"    tools:layout_editor_absoluteY="81dp"    tools:layout_editor_absoluteX="0dp">

    <TimePicker        android:id="@+id/alarmTimePicker"        android:layout_width="350dp"        android:layout_height="372dp"        app:layout_constraintTop_toTopOf="parent"        android:layout_marginTop="8dp"        android:layout_marginLeft="8dp"        app:layout_constraintLeft_toLeftOf="parent"        android:layout_marginRight="8dp"        app:layout_constraintRight_toRightOf="parent"        app:layout_constraintHorizontal_bias="0.518" />


    <Button        android:layout_width="wrap_content"        android:layout_height="wrap_content"        android:text="Set alarm"        android:id="@+id/start_alarm"        android:layout_alignParentLeft="true"        android:layout_alignParentStart="true"        android:onClick="startTimer"        android:layout_marginTop="8dp"        app:layout_constraintTop_toBottomOf="@+id/alarmText"        android:layout_marginLeft="63dp"        app:layout_constraintLeft_toLeftOf="parent"        app:layout_constraintBottom_toBottomOf="parent"        android:layout_marginBottom="8dp" />

    <Button        android:layout_width="wrap_content"        android:layout_height="wrap_content"        android:text="Unset alarm"        android:id="@+id/stop_alarm"
        android:layout_alignParentRight="true"        android:layout_alignParentEnd="true"        android:onClick="cancelTimer"        android:layout_marginTop="8dp"        app:layout_constraintTop_toBottomOf="@+id/alarmText"        android:layout_marginRight="8dp"        app:layout_constraintRight_toRightOf="parent"        app:layout_constraintLeft_toRightOf="@+id/start_alarm"        android:layout_marginLeft="8dp"        app:layout_constraintHorizontal_bias="0.705"        app:layout_constraintBottom_toBottomOf="parent"        android:layout_marginBottom="8dp" />

    <TextView        android:layout_width="wrap_content"        android:layout_height="wrap_content"        android:textAppearance="?android:attr/textAppearanceLarge"        android:text="Set the alarm clock!"        android:id="@+id/alarmText"        android:layout_alignParentBottom="true"        android:layout_centerHorizontal="true"        android:layout_below="@+id/start_alarm"        android:layout_marginTop="8dp"        app:layout_constraintTop_toBottomOf="@+id/alarmTimePicker"        android:layout_marginRight="8dp"        app:layout_constraintRight_toRightOf="parent"        android:layout_marginLeft="8dp"        app:layout_constraintLeft_toLeftOf="parent" />


</android.support.constraint.ConstraintLayout>