Contoh Manajer Alarm

Saya ingin menerapkan fungsi jadwal dalam proyek saya. Jadi saya mencari Google untuk program manajer Alarm tetapi saya tidak dapat menemukan contoh.

Adakah yang bisa membantu saya dengan program manajer alarm dasar?

Ini adalah kode yang berfungsi. Ini membangunkan CPU setiap 10 menit sampai telepon mati.

Tambahkan ke Manifest.xml:

...
<uses-permission android:name="android.permission.WAKE_LOCK"></uses-permission>
...
<receiver android:process=":remote" android:name=".Alarm"></receiver>
...

Kode di kelas Anda:

package yourPackage;
import android.app.AlarmManager;
import android.app.PendingIntent;
import android.content.BroadcastReceiver;
import android.content.Context;
import android.content.Intent;
import android.os.PowerManager;
import android.widget.Toast;

public class Alarm extends BroadcastReceiver 
{    
    @Override
    public void onReceive(Context context, Intent intent) 
    {   
        PowerManager pm = (PowerManager) context.getSystemService(Context.POWER_SERVICE);
        PowerManager.WakeLock wl = pm.newWakeLock(PowerManager.PARTIAL_WAKE_LOCK, "");
        wl.acquire();

        // Put here YOUR code.
        Toast.makeText(context, "Alarm !!!!!!!!!!", Toast.LENGTH_LONG).show(); // For example

        wl.release();
    }

    public void setAlarm(Context context)
    {
        AlarmManager am =( AlarmManager)context.getSystemService(Context.ALARM_SERVICE);
        Intent i = new Intent(context, Alarm.class);
        PendingIntent pi = PendingIntent.getBroadcast(context, 0, i, 0);
        am.setRepeating(AlarmManager.RTC_WAKEUP, System.currentTimeMillis(), 1000 * 60 * 10, pi); // Millisec * Second * Minute
    }

    public void cancelAlarm(Context context)
    {
        Intent intent = new Intent(context, Alarm.class);
        PendingIntent sender = PendingIntent.getBroadcast(context, 0, intent, 0);
        AlarmManager alarmManager = (AlarmManager) context.getSystemService(Context.ALARM_SERVICE);
        alarmManager.cancel(sender);
    }
}

Setel Alarm dari Layanan:

package yourPackage;

import android.app.Service;
import android.content.Context;
import android.content.Intent;
import android.os.IBinder;

public class YourService extends Service
{
    Alarm alarm = new Alarm();
    public void onCreate()
    {
        super.onCreate();       
    }

    @Override
    public int onStartCommand(Intent intent, int flags, int startId) 
    {
        alarm.setAlarm(this);
        return START_STICKY;
    }

   @Override        
   public void onStart(Intent intent, int startId)
    {
        alarm.setAlarm(this);
    }

    @Override
    public IBinder onBind(Intent intent) 
    {
        return null;
    }
}

Jika Anda ingin mengatur alarm berulang saat boot telepon:

Tambahkan izin dan layanan ke Manifest.xml:

<uses-permission android:name="android.permission.RECEIVE_BOOT_COMPLETED"></uses-permission>
...
<receiver android:name=".AutoStart">
    <intent-filter>
        <action android:name="android.intent.action.BOOT_COMPLETED"></action>
    </intent-filter>
</receiver>
...
<service
        android:name=".YourService"
        android:enabled="true"
        android:process=":your_service" >
</service>

Dan buat kelas baru:

package yourPackage;

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

public class AutoStart extends BroadcastReceiver
{   
    Alarm alarm = new Alarm();
    @Override
    public void onReceive(Context context, Intent intent)
    {   
        if (intent.getAction().equals(Intent.ACTION_BOOT_COMPLETED))
        {
            alarm.setAlarm(context);
        }
    }
}

Saya mencoba solusi dari XXX dan sementara itu awalnya bekerja, di beberapa titik itu berhenti berfungsi. Yang onReceivetidak pernah dipanggil lagi. Saya menghabiskan waktu berjam-jam untuk mencari tahu apa itu. Apa yang saya sadari adalah bahwa Intentalasan misterius apa pun tidak lagi dipanggil. Untuk menyiasati ini, saya menemukan bahwa Anda benar-benar perlu menentukan tindakan untuk penerima di manifes. Contoh:

<receiver android:name=".Alarm" android:exported="true">
    <intent-filter>
        <action android:name="mypackage.START_ALARM" >
        </action>
    </intent-filter>
</receiver> 

Perhatikan bahwa nama itu ".Alarm"dengan titik. Dalam setAlarmmetode XXX , buat Intentsebagai berikut:

Intent i = new Intent("mypackage.START_ALARM");

The START_ALARMpesan dapat menjadi apa pun yang Anda inginkan. Saya hanya memberikan nama itu untuk tujuan demonstrasi.

Saya belum melihat penerima yang ditentukan dalam manifes tanpa filter maksud yang menentukan tindakan. Menciptakannya seperti yang ditentukan XXX tampaknya agak palsu. Dengan menentukan nama tindakan, Android akan dipaksa untuk membuat turunan dari BroadcastReceiverpenggunaan kelas yang sesuai dengan tindakan. Jika Anda mengandalkan konteks, ketahuilah bahwa Android memiliki beberapa objek berbeda yang SEMUA disebut konteks dan mungkin tidak menghasilkan karya Anda BroadcastReceiver. Memaksa Android untuk membuat instance kelas Anda hanya menggunakan pesan tindakan jauh lebih baik daripada mengandalkan beberapa konteks rapuh yang mungkin tidak pernah berhasil.

Inilah contoh yang cukup lengkap. Ternyata tombol menjadi merah setelah 5sec.

    public void SetAlarm()
    {
        final Button button = buttons[2]; // replace with a button from your own UI
        BroadcastReceiver receiver = new BroadcastReceiver() {
            @Override public void onReceive( Context context, Intent _ )
            {
                button.setBackgroundColor( Color.RED );
                context.unregisterReceiver( this ); // this == BroadcastReceiver, not Activity
            }
        };

        this.registerReceiver( receiver, new IntentFilter("com.blah.blah.somemessage") );

        PendingIntent pintent = PendingIntent.getBroadcast( this, 0, new Intent("com.blah.blah.somemessage"), 0 );
        AlarmManager manager = (AlarmManager)(this.getSystemService( Context.ALARM_SERVICE ));

        // set alarm to fire 5 sec (1000*5) from now (SystemClock.elapsedRealtime())
        manager.set( AlarmManager.ELAPSED_REALTIME_WAKEUP, SystemClock.elapsedRealtime() + 1000*5, pintent );
    }

Ingat juga bahwa AlarmManager menyala meskipun aplikasi Anda tidak berjalan. Jika Anda memanggil fungsi ini dan menekan tombol Rumah, tunggu 5 detik, lalu kembali ke aplikasi Anda, tombol akan berubah menjadi merah.

Saya tidak tahu perilaku seperti apa yang akan Anda dapatkan jika aplikasi Anda tidak memiliki memori sama sekali, jadi berhati-hatilah dengan kondisi seperti apa yang Anda coba pertahankan.

MainActivity.java

package com.example.alarmexample;  

import android.app.Activity;  
import android.app.AlarmManager;  
import android.app.PendingIntent;  
import android.content.Intent;  
import android.os.Bundle;  
import android.view.View;  
import android.view.View.OnClickListener;  
import android.widget.Button;  
import android.widget.EditText;  
import android.widget.Toast;  

public class MainActivity extends Activity {  
Button b1;  

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

        startAlert();  

}   public void startAlert() { 
        int timeInSec = 2;

        Intent intent = new Intent(this, MyBroadcastReceiver.class);  
        PendingIntent pendingIntent = PendingIntent.getBroadcast(  
                                      this.getApplicationContext(), 234, intent, 0);  
        AlarmManager alarmManager = (AlarmManager) getSystemService(ALARM_SERVICE);  
        alarmManager.set(AlarmManager.RTC_WAKEUP, System.currentTimeMillis() + (timeInSec * 1000), pendingIntent);  
        Toast.makeText(this, "Alarm set to after " + i + " seconds",Toast.LENGTH_LONG).show();  
    }  

}

MyBroadcastReceiver.java

package com.example.alarmexample;  

import android.content.BroadcastReceiver;  
import android.content.Context;  
import android.content.Intent;  
import android.media.MediaPlayer;  
import android.widget.Toast;  

public class MyBroadcastReceiver extends BroadcastReceiver {  
    MediaPlayer mp;  
    @Override  
    public void onReceive(Context context, Intent intent) {  
        mp=MediaPlayer.create(context, R.raw.alarm);  
        mp.start();  
        Toast.makeText(context, "Alarm", Toast.LENGTH_LONG).show();  
    }  
}  

AndroidManifest.xml

<?xml version="1.0" encoding="utf-8"?>  
<manifest xmlns:android="http://schemas.android.com/apk/res/android"  
    package="com.example.alarmexample" >  

    <uses-permission android:name="android.permission.VIBRATE" />  


    <application  
        android:allowBackup="true"  
        android:icon="@drawable/ic_launcher"  
        android:label="@string/app_name"  
        android:theme="@style/AppTheme" >  

        <activity  
            android:name="com.example.alarmexample.MainActivity"  
            android:label="@string/app_name" >  
            <intent-filter>  
                <action android:name="android.intent.action.MAIN" />  

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

        <receiver android:name="MyBroadcastReceiver" >  
        </receiver>  
    </application>  

</manifest>  

• AlarmManagerdikombinasikan denganIntentService

Saya pikir pola terbaik untuk digunakan AlarmManageradalah kolaborasi dengan IntentService. Ini IntentServicedipicu oleh AlarmManagerdan menangani tindakan yang diperlukan melalui niat penerima. Struktur ini tidak memiliki dampak kinerja seperti menggunakan BroadcastReceiver. Saya telah mengembangkan kode sampel untuk gagasan ini dikotlin yang tersedia di sini:

MyAlarmManager.kt

import android.app.AlarmManager
import android.app.PendingIntent
import android.content.Context
import android.content.Intent

object MyAlarmManager {

    private var pendingIntent: PendingIntent? = null

    fun setAlarm(context: Context, alarmTime: Long, message: String) {
        val alarmManager: AlarmManager = context.getSystemService(Context.ALARM_SERVICE) as AlarmManager

        val intent = Intent(context, MyIntentService::class.java)
        intent.action = MyIntentService.ACTION_SEND_TEST_MESSAGE
        intent.putExtra(MyIntentService.EXTRA_MESSAGE, message)

        pendingIntent = PendingIntent.getService(context, 0, intent, PendingIntent.FLAG_UPDATE_CURRENT)
        alarmManager.set(AlarmManager.RTC_WAKEUP, alarmTime, pendingIntent)
    }

    fun cancelAlarm(context: Context) {
        pendingIntent?.let {
            val alarmManager: AlarmManager = context.getSystemService(Context.ALARM_SERVICE) as AlarmManager
            alarmManager.cancel(it)
        }
    }

}

MyIntentService.kt

import android.app.IntentService
import android.content.Intent

class MyIntentService : IntentService("MyIntentService") {

    override fun onHandleIntent(intent: Intent?) {
        intent?.apply {
            when (intent.action) {
                ACTION_SEND_TEST_MESSAGE -> {
                    val message = getStringExtra(EXTRA_MESSAGE)
                    println(message)
                }
            }
        }
    }

    companion object {
        const val ACTION_SEND_TEST_MESSAGE = "ACTION_SEND_TEST_MESSAGE"
        const val EXTRA_MESSAGE = "EXTRA_MESSAGE"
    }

}

manifes.xml

<?xml version="1.0" encoding="utf-8"?>
<manifest xmlns:android="http://schemas.android.com/apk/res/android"
    package="com.aminography.alarm">

    <application
        ... >

    <service
        android:name="path.to.MyIntentService"
        android:enabled="true"
        android:stopWithTask="false" />

    </application>

</manifest>

Pemakaian:

val calendar = Calendar.getInstance()
calendar.add(Calendar.SECOND, 10)
MyAlarmManager.setAlarm(applicationContext, calendar.timeInMillis, "Test Message!")

Jika Anda ingin membatalkan alarm yang dijadwalkan, coba ini:

MyAlarmManager.cancelAlarm(applicationContext)

Kode ini akan membantu Anda membuat alarm berulang. Waktu berulang dapat Anda atur.

activity_main.xml

<?xml version="1.0" encoding="utf-8"?>
     <LinearLayout 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:orientation="vertical" 
     android:background="#000000"
     android:paddingTop="100dp">

    <LinearLayout
    android:layout_width="match_parent"
    android:layout_height="wrap_content"
    android:gravity="center" >

    <EditText
        android:id="@+id/ethr"
    android:layout_width="50dp"
    android:layout_height="wrap_content"
    android:ems="10"
    android:hint="Hr"
    android:singleLine="true" >


        <requestFocus />
    </EditText>

    <EditText
        android:id="@+id/etmin"
    android:layout_width="55dp"
    android:layout_height="wrap_content"

    android:ems="10"
    android:hint="Min"
    android:singleLine="true" />

    <EditText
        android:id="@+id/etsec"
    android:layout_width="50dp"
    android:layout_height="wrap_content"

    android:ems="10"
    android:hint="Sec"
    android:singleLine="true" />

    </LinearLayout>

   <LinearLayout
    android:layout_width="match_parent"
    android:layout_height="wrap_content" 
    android:gravity="center"
    android:paddingTop="10dp">


    <Button
        android:id="@+id/setAlarm"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:onClick="onClickSetAlarm"
        android:text="Set Alarm" />

</LinearLayout>

</LinearLayout>

MainActivity.java

public class MainActivity extends Activity {
    int hr = 0;
    int min = 0;
    int sec = 0;
    int result = 1;

    AlarmManager alarmManager;
    PendingIntent pendingIntent;
    BroadcastReceiver mReceiver;

    EditText ethr;
    EditText etmin;
    EditText etsec;

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);
        ethr = (EditText) findViewById(R.id.ethr);
        etmin = (EditText) findViewById(R.id.etmin);
        etsec = (EditText) findViewById(R.id.etsec);
        RegisterAlarmBroadcast();
    } 

    @Override
    public boolean onCreateOptionsMenu(Menu menu) {
        getMenuInflater().inflate(R.menu.main, menu);
        return true;
    }

    @Override
    protected void onDestroy() {
        unregisterReceiver(mReceiver);
        super.onDestroy();
    }

    public void onClickSetAlarm(View v) {
        String shr = ethr.getText().toString();
        String smin = etmin.getText().toString();
        String ssec = etsec.getText().toString();

        if(shr.equals("")) 
            hr = 0;
        else {
            hr = Integer.parseInt(ethr.getText().toString());
            hr=hr*60*60*1000;
        }

        if(smin.equals(""))
            min = 0;
        else {
            min = Integer.parseInt(etmin.getText().toString());
            min = min*60*1000;
        }

        if(ssec.equals(""))
            sec = 0;
        else {
             sec = Integer.parseInt(etsec.getText().toString());
             sec = sec * 1000;
        }
        result = hr+min+sec;
        alarmManager.setRepeating(AlarmManager.RTC_WAKEUP, System.currentTimeMillis(), result , pendingIntent); 
    }

    private void RegisterAlarmBroadcast() {
        mReceiver = new BroadcastReceiver() {
            // private static final String TAG = "Alarm Example Receiver";
            @Override
            public void onReceive(Context context, Intent intent) {
                Toast.makeText(context, "Alarm time has been reached", Toast.LENGTH_LONG).show();
            }
        };

        registerReceiver(mReceiver, new IntentFilter("sample"));
        pendingIntent = PendingIntent.getBroadcast(this, 0, new Intent("sample"), 0);
        alarmManager = (AlarmManager)(this.getSystemService(Context.ALARM_SERVICE));
    }

    private void UnregisterAlarmBroadcast() {
        alarmManager.cancel(pendingIntent); 
        getBaseContext().unregisterReceiver(mReceiver);
    }
}

Jika Anda hanya perlu alarm untuk satu waktu, maka ganti

alarmManager.setRepeating(AlarmManager.RTC_WAKEUP, System.currentTimeMillis(), result , pendingIntent);

dengan

 alarmManager.set( AlarmManager.RTC_WAKEUP, System.currentTimeMillis() + result , pendingIntent );

Saya telah membuat implementasi sendiri untuk melakukan ini dengan cara sesederhana mungkin.

import android.app.AlarmManager;
import android.app.PendingIntent;
import android.content.BroadcastReceiver;
import android.content.Context;
import android.content.Intent;
import android.content.IntentFilter;

import junit.framework.Assert;

/**
 * Created by Daniel on 28/08/2016.
 */
public abstract class AbstractSystemServiceTask {

    private final Context context;
    private final AlarmManager alarmManager;
    private final BroadcastReceiver broadcastReceiver;
    private final PendingIntent pendingIntent;

    public AbstractSystemServiceTask(final Context context, final String id, final long time, final AlarmType alarmType, final BackgroundTaskListener backgroundTaskListener) {

        Assert.assertNotNull("ApplicationContext can't be null", context);
        Assert.assertNotNull("ID can't be null", id);

        this.context = context;

        this.alarmManager = (AlarmManager) this.context.getSystemService(Context.ALARM_SERVICE);

        this.context.registerReceiver(
                this.broadcastReceiver = this.getBroadcastReceiver(backgroundTaskListener),
                new IntentFilter(id));

        this.configAlarmManager(
                this.pendingIntent = PendingIntent.getBroadcast(this.context, 0, new Intent(id), 0),
                time,
                alarmType);
    }

    public void stop() {

        this.alarmManager.cancel(this.pendingIntent);
        this.context.unregisterReceiver(this.broadcastReceiver);
    }

    private BroadcastReceiver getBroadcastReceiver(final BackgroundTaskListener backgroundTaskListener) {

        Assert.assertNotNull("BackgroundTaskListener can't be null.", backgroundTaskListener);

        return new BroadcastReceiver() {

            @Override
            public void onReceive(Context context, Intent intent) {

                backgroundTaskListener.perform(context, intent);
            }
        };
    }

    private void configAlarmManager(final PendingIntent pendingIntent, final long time, final AlarmType alarmType) {

        long ensurePositiveTime = Math.max(time, 0L);

        switch (alarmType) {
            case REPEAT:
                this.alarmManager.setRepeating(AlarmManager.RTC_WAKEUP, System.currentTimeMillis(), ensurePositiveTime, pendingIntent);
                break;
            case ONE_TIME:
            default:
                this.alarmManager.set(AlarmManager.RTC_WAKEUP, System.currentTimeMillis() + ensurePositiveTime, pendingIntent);
        }
    }

    public interface BackgroundTaskListener {

        void perform(Context context, Intent intent);

    }

    public enum AlarmType {

        REPEAT, ONE_TIME;

    }

}

Satu-satunya langkah selanjutnya, terapkan.

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

import ...AbstractSystemServiceTask;

import java.util.concurrent.TimeUnit;

/**
 * Created by Daniel on 28/08/2016.
 */
public class UpdateInfoSystemServiceTask extends AbstractSystemServiceTask {

    private final static String ID = "UPDATE_INFO_SYSTEM_SERVICE";
    private final static long REPEAT_TIME = TimeUnit.SECONDS.toMillis(10);
    private final static AlarmType ALARM_TYPE = AlarmType.REPEAT;

    public UpdateInfoSystemServiceTask(Context context) {

        super(context, ID, REPEAT_TIME, ALARM_TYPE, new BackgroundTaskListener() {

            @Override
            public void perform(Context context, Intent intent) {

                Log.i("MyAppLog", "-----> UpdateInfoSystemServiceTask");

                //DO HERE WHATEVER YOU WANT...
            }
        });

        Log.i("MyAppLog", "UpdateInfoSystemServiceTask started.");
    }

}

Saya suka bekerja dengan implementasi ini, tetapi cara lain yang mungkin baik, itu tidak membuat AbstractSystemServiceTaskabstrak kelas, dan membangunnya melalui Builder.

Saya harap ini membantu Anda.

DIPERBARUI Ditingkatkan untuk memungkinkan beberapa orang BackgroundTaskListenermelakukan hal yang sama BroadCastReceiver.

import android.app.AlarmManager;
import android.app.PendingIntent;
import android.content.BroadcastReceiver;
import android.content.Context;
import android.content.Intent;
import android.content.IntentFilter;

import junit.framework.Assert;

import java.util.HashSet;
import java.util.Set;

/**
 * Created by Daniel on 28/08/2016.
 */
public abstract class AbstractSystemServiceTask {

    private final Context context;
    private final AlarmManager alarmManager;
    private final BroadcastReceiver broadcastReceiver;
    private final PendingIntent pendingIntent;

    private final Set<BackgroundTaskListener> backgroundTaskListenerSet;

    public AbstractSystemServiceTask(final Context context, final String id, final long time, final AlarmType alarmType) {

        Assert.assertNotNull("ApplicationContext can't be null", context);
        Assert.assertNotNull("ID can't be null", id);

        this.backgroundTaskListenerSet = new HashSet<>();

        this.context = context;

        this.alarmManager = (AlarmManager) this.context.getSystemService(Context.ALARM_SERVICE);

        this.context.registerReceiver(
                this.broadcastReceiver = this.getBroadcastReceiver(),
                new IntentFilter(id));

        this.configAlarmManager(
                this.pendingIntent = PendingIntent.getBroadcast(this.context, 0, new Intent(id), 0),
                time,
                alarmType);
    }

    public synchronized void registerTask(final BackgroundTaskListener backgroundTaskListener) {

        Assert.assertNotNull("BackgroundTaskListener can't be null", backgroundTaskListener);

        this.backgroundTaskListenerSet.add(backgroundTaskListener);
    }

    public synchronized void removeTask(final BackgroundTaskListener backgroundTaskListener) {

        Assert.assertNotNull("BackgroundTaskListener can't be null", backgroundTaskListener);

        this.backgroundTaskListenerSet.remove(backgroundTaskListener);
    }

    public void stop() {

        this.backgroundTaskListenerSet.clear();

        this.alarmManager.cancel(this.pendingIntent);
        this.context.unregisterReceiver(this.broadcastReceiver);
    }

    private BroadcastReceiver getBroadcastReceiver() {

        return new BroadcastReceiver() {

            @Override
            public void onReceive(final Context context, final Intent intent) {

                for (BackgroundTaskListener backgroundTaskListener : AbstractSystemServiceTask.this.backgroundTaskListenerSet) {

                    backgroundTaskListener.perform(context, intent);
                }
            }
        };
    }

    private void configAlarmManager(final PendingIntent pendingIntent, final long time, final AlarmType alarmType) {

        long ensurePositiveTime = Math.max(time, 0L);

        switch (alarmType) {
            case REPEAT:
                this.alarmManager.setRepeating(AlarmManager.RTC_WAKEUP, System.currentTimeMillis(), ensurePositiveTime, pendingIntent);
                break;
            case ONE_TIME:
            default:
                this.alarmManager.set(AlarmManager.RTC_WAKEUP, System.currentTimeMillis() + ensurePositiveTime, pendingIntent);
        }
    }

    public interface BackgroundTaskListener {

        void perform(Context context, Intent intent);

    }

    public enum AlarmType {

        REPEAT, ONE_TIME;

    }

}

Manajer Alarm:

Tambahkan Ke Tata Letak XML (* init tampilan ini di buat di aktivitas utama)

  <TimePicker
    android:id="@+id/timepicker"
    android:layout_width="match_parent"
    android:layout_height="0dp"
    android:layout_weight="2"></TimePicker>

  <Button
    android:id="@+id/btn_start"
    android:text="start Alarm"
    android:onClick="start_alarm_event"
    android:layout_width="match_parent"
    android:layout_height="52dp" />

Add To Manifest (Tag aplikasi di dalam && kegiatan di luar)

 <receiver android:name=".AlarmBroadcastManager"
        android:enabled="true"
        android:exported="true"/>

Buat AlarmBroadcastManager Class (mewarisi dari BroadcastReceiver)

 public class AlarmBroadcastManager extends BroadcastReceiver{
    @Override
    public void onReceive(Context context, Intent intent) {
      MediaPlayer mediaPlayer=MediaPlayer.create(context,Settings.System.DEFAULT_RINGTONE_URI);
      mediaPlayer.start();
    }
 }

Dalam Kegiatan Utama (Tambahkan Fungsi-Fungsi ini):

 @RequiresApi(api = Build.VERSION_CODES.M)
 public  void start_alarm_event(View view){
    Calendar calendar=Calendar.getInstance();
    calendar.set(
    calendar.get(Calendar.YEAR),
    calendar.get(Calendar.MONTH),
    calendar.get(Calendar.DAY_OF_MONTH),
    timePicker.getHour(),
    timePicker.getMinute(),
    0
    );
    setAlarm(calendar.getTimeInMillis());
 }

 public void setAlarm(long timeInMillis){
    AlarmManager alarmManager=(AlarmManager) getSystemService(Context.ALARM_SERVICE);
    Intent intent=new Intent(this,AlarmBroadcastManager.class);
    PendingIntent pendingIntent=PendingIntent.getBroadcast(this,0,intent,0);
     alarmManager.setRepeating(AlarmManager.RTC_WAKEUP,timeInMillis,AlarmManager.INTERVAL_DAY,pendingIntent);
    Toast.makeText(getApplicationContext(),"Alarm is Set",Toast.LENGTH_SHORT).show();


 }

Berikut ini contoh dengan Pengelola Alarm menggunakan Kotlin:

class MainActivity : AppCompatActivity() {

    val editText: EditText by bindView(R.id.edit_text)
    val timePicker: TimePicker by bindView(R.id.time_picker)
    val buttonSet: Button by bindView(R.id.button_set)
    val buttonCancel: Button by bindView(R.id.button_cancel)
    val relativeLayout: RelativeLayout by bindView(R.id.activity_main)
    var notificationId = 0

    override fun onCreate(savedInstanceState: Bundle?) {
        super.onCreate(savedInstanceState)
        setContentView(R.layout.activity_main)

        timePicker.setIs24HourView(true)

        val alarmManager = getSystemService(Context.ALARM_SERVICE) as AlarmManager

        buttonSet.setOnClickListener {
            if (editText.text.isBlank()) {
                Toast.makeText(applicationContext, "Title is Required!!", Toast.LENGTH_SHORT).show()
                return@setOnClickListener
            }
            alarmManager.set(
                AlarmManager.RTC_WAKEUP,
                Calendar.getInstance().apply {
                    set(Calendar.HOUR_OF_DAY, timePicker.hour)
                    set(Calendar.MINUTE, timePicker.minute)
                    set(Calendar.SECOND, 0)
                }.timeInMillis,
                PendingIntent.getBroadcast(
                    applicationContext,
                    0,
                    Intent(applicationContext, AlarmBroadcastReceiver::class.java).apply {
                        putExtra("notificationId", ++notificationId)
                        putExtra("reminder", editText.text)
                    },
                    PendingIntent.FLAG_CANCEL_CURRENT
                )
            )
            Toast.makeText(applicationContext, "SET!! ${editText.text}", Toast.LENGTH_SHORT).show()
            reset()
        }

        buttonCancel.setOnClickListener {
            alarmManager.cancel(
                PendingIntent.getBroadcast(
                    applicationContext, 0, Intent(applicationContext, AlarmBroadcastReceiver::class.java), 0))
            Toast.makeText(applicationContext, "CANCEL!!", Toast.LENGTH_SHORT).show()
        }
    }

    override fun onTouchEvent(event: MotionEvent?): Boolean {
        (getSystemService(Context.INPUT_METHOD_SERVICE) as InputMethodManager)
            .hideSoftInputFromWindow(relativeLayout.windowToken, InputMethodManager.HIDE_NOT_ALWAYS)
        relativeLayout.requestFocus()
        return super.onTouchEvent(event)
    }

    override fun onResume() {
        super.onResume()
        reset()
    }

    private fun reset() {
        timePicker.apply {
            val now = Calendar.getInstance()
            hour = now.get(Calendar.HOUR_OF_DAY)
            minute = now.get(Calendar.MINUTE)
        }
        editText.setText("")
    }
}