How To Create Alarm App In Android

Introduction

Android is one of the most popular operating systems for mobiles. The alarm app takes place in day by day Android usage. Each Android mobile contains an alarm application. Simply alarm is our wake-up assistant. So, I will show you how to create an alarm android application using Android Studio. Android is the kernel-based operating system.it allows the user can modify the GUI components and source code.

Requirements

Android Studio
Little bit XML and JAVA knowledge.
Android Emulator (or) Android mobile

Download link (Android Studio): https://developer.android.com/studio/index.html

Steps should be followed

Carefully follow my steps to create an Alarm Android Application using Android Studio. I have included the source code below.

Step 1

Open the Android Studio and start a new project.

Android Studio

Step 2

Put the application name and company domain. If you wish to use C++ for coding the project, mark the "Include C++ support" checkbox and then click Next.

Android Studio

Step 3

Select the Android minimum SDK. After you chose the minimum SDK, it will show an approximate percentage of people who use that SDK. Click Next.

Android Studio

Step 4

Choose the basic activity, then click Next.

Android Studio

Step 5

Put the activity name and layout name. Android Studio basically takes the java class name that you provide as the activity name and click Finish.

Android Studio

Step 6

Go to activity_main.xml then click the text bottom. This xml file contains the designing code for the android app. Into the activity_main.xml copy and paste the below code.

Activity_main.xml code

<?xml version= "1.0" encoding= "utf-8" ?>
<android.support.design.widget.CoordinatorLayout 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"
android:fitsSystemWindows="true"
tools:context="ganeshannt.alarm.MainActivity" >
<android.support.design.widget.AppBarLayout
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:theme="@style/AppTheme.AppBarOverlay" >
<android.support.v7.widget.Toolbar
android:id="@+id/toolbar"
android:layout_width="match_parent"
android:layout_height="?attr/actionBarSize"
android:background="?attr/colorPrimary"
app:popupTheme="@style/AppTheme.PopupOverlay" />
</android.support.design.widget.AppBarLayout>
<include layout="@layout/content_main" />
</android.support.design.widget.CoordinatorLayout>

Android

Step 7

Create a new content_main.xml file (File ⇒ New ⇒Activity⇒Empty_activity).

Go to content_main.xml then click the text bottom. This xml file contains the designing code for the android app. Into the content_main.xml copy and paste the below code.

content_main.xml code

<?xml version= "1.0" encoding= "utf-8" ?>
<android.support.design.widget.CoordinatorLayout 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"
android:fitsSystemWindows="true"
tools:context="ganeshannt.alarm.MainActivity" >
<android.support.design.widget.AppBarLayout
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:theme="@style/AppTheme.AppBarOverlay" >
<android.support.v7.widget.Toolbar
android:id="@+id/toolbar"
android:layout_width="match_parent"
android:layout_height="?attr/actionBarSize"
android:background="?attr/colorPrimary"
app:popupTheme="@style/AppTheme.PopupOverlay" />
</android.support.design.widget.AppBarLayout>
<include layout="@layout/content_main" />
</android.support.design.widget.CoordinatorLayout>

Android

Step 8

Into the MainActivity.java copy and paste the below code.java programming is the backend language for android. Do not replace your package name otherwise, the app will not run.

MainActivity.java code

package ganeshannt.alarm;
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.os.Bundle;
import android.support.v7.app.AppCompatActivity;
import android.support.v7.widget.Toolbar;
import android.util.Log;
import android.view.Menu;
import android.view.MenuItem;
import android.view.View;
import android.widget.AdapterView;
import android.widget.ArrayAdapter;
import android.widget.Button;
import android.widget.Spinner;
import android.widget.TextView;
import android.widget.TimePicker;
import java.util.Calendar;
public class MainActivity extends AppCompatActivity implements AdapterView.OnItemSelectedListener {
AlarmManager alarm_manager;
TimePicker alarm_timepicker;
TextView update_text;
Context context;
PendingIntent pending_intent;
int choose_whale_sound;
@Override
protected void onCreate(Bundle savedInstanceState) {
super .onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
Toolbar toolbar = (Toolbar) findViewById(R.id.toolbar);
setSupportActionBar(toolbar);
this .context = this ;
alarm_manager = (AlarmManager) getSystemService(ALARM_SERVICE);
alarm_timepicker = (TimePicker) findViewById(R.id.timePicker);
update_text = (TextView) findViewById(R.id.update_text);
final Calendar calendar = Calendar.getInstance();
final Intent my_intent = new Intent( this .context, Alarm_Receiver. class );
Spinner spinner = (Spinner) findViewById(R.id.richard_spinner);
ArrayAdapter<CharSequence> adapter = ArrayAdapter.createFromResource(this ,
R.array.whale_array, android.R.layout.simple_spinner_item);
adapter.setDropDownViewResource(android.R.layout.simple_spinner_dropdown_item);
spinner.setAdapter(adapter);
spinner.setOnItemSelectedListener(this );
Button alarm_on = (Button) findViewById(R.id.alarm_on);
alarm_on.setOnClickListener(new View.OnClickListener() {
@TargetApi(Build.VERSION_CODES.M)
@Override
public void onClick(View v) {
calendar.set(Calendar.HOUR_OF_DAY, alarm_timepicker.getHour());
calendar.set(Calendar.MINUTE, alarm_timepicker.getMinute());
int hour = alarm_timepicker.getHour();
int minute = alarm_timepicker.getMinute();
String hour_string = String.valueOf(hour);
String minute_string = String.valueOf(minute);
if (hour > 12) {
hour_string = String.valueOf(hour - 12);
}
if (minute < 10) {
minute_string ="0" + String.valueOf(minute);
}
set_alarm_text("Alarm set to: " + hour_string + ":" + minute_string);
my_intent.putExtra("extra" , "alarm on" );
my_intent.putExtra("whale_choice" , choose_whale_sound);
Log.e("The whale id is" , String.valueOf(choose_whale_sound));
pending_intent = PendingIntent.getBroadcast(MainActivity.this , 0,
my_intent, PendingIntent.FLAG_UPDATE_CURRENT);
alarm_manager.set(AlarmManager.RTC_WAKEUP, calendar.getTimeInMillis(),
pending_intent);
}
});
Button alarm_off = (Button) findViewById(R.id.alarm_off);
alarm_off.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View v) {
set_alarm_text("Alarm off!" );
alarm_manager.cancel(pending_intent);
my_intent.putExtra("extra" , "alarm off" );
my_intent.putExtra("whale_choice" , choose_whale_sound);
sendBroadcast(my_intent);
}
});
}
private void set_alarm_text(String output) {
update_text.setText(output);
}
@Override
public boolean onCreateOptionsMenu(Menu menu) {
getMenuInflater().inflate(R.menu.menu_main, menu);
return true ;
}
@Override
public boolean onOptionsItemSelected(MenuItem item) {
int id = item.getItemId();
if (id == R.id.action_settings) {
return true ;
}
return super .onOptionsItemSelected(item);
}
@Override
public void onItemSelected(AdapterView<?> parent, View view, int position, long id) {
choose_whale_sound = (int ) id;
}
@Override
public void onNothingSelected(AdapterView<?> parent) {
}
}

Step 9

Create a new Alarm_Receiver.java file (File ⇒ New ⇒Java class).

Into the Alarm_Receiver.java copy and paste the below code.java programming is the backend language for android. Do not replace your package name otherwise, the app will not run.

Alarm_Receiver.java code

import android.content.BroadcastReceiver;
import android.content.Context;
import android.content.Intent;
import android.util.Log;
public class Alarm_Receiver extends BroadcastReceiver{
@Override
public void onReceive(Context context, Intent intent) {
Log.e("We are in the receiver." , "Yay!" );
String get_your_string = intent.getExtras().getString("extra" );
Log.e("What is the key? " , get_your_string);
Integer get_your_whale_choice = intent.getExtras().getInt("whale_choice" );
Log.e("The whale choice is " , get_your_whale_choice.toString());
Intent service_intent =new Intent(context, RingtonePlayingService. class );
service_intent.putExtra("extra" , get_your_string);
service_intent.putExtra("whale_choice" , get_your_whale_choice);
context.startService(service_intent);
}
}

Step 10

Create a new RingtonePlayingService.java file (File ⇒ New ⇒Java class).

Into the RingtonePlayingService.java copy and paste the below code.java programming is the backend language for android. Do not replace your package name otherwise, the app will not run.

RingtonePlayingService.java code

package ganeshannt.alarm;
import android.annotation.TargetApi;
import android.app.Notification;
import android.app.NotificationManager;
import android.app.PendingIntent;
import android.app.Service;
import android.content.Intent;
import android.media.MediaPlayer;
import android.os.Build;
import android.os.IBinder;
import android.util.Log;
import java.util.Random;
public class RingtonePlayingService extends Service {
MediaPlayer media_song;
int startId;
boolean isRunning;
@Override
public IBinder onBind(Intent intent) {
return null ;
}
@TargetApi(Build.VERSION_CODES.JELLY_BEAN)
@Override
public int onStartCommand(Intent intent, int flags, int startId) {
Log.i("LocalService" , "Received start id " + startId + ": " + intent);
String state = intent.getExtras().getString("extra" );
Integer whale_sound_choice = intent.getExtras().getInt("whale_choice" );
Log.e("Ringtone extra is " , state);
Log.e("Whale choice is " , whale_sound_choice.toString());
NotificationManager notify_manager = (NotificationManager)
getSystemService(NOTIFICATION_SERVICE);
Intent intent_main_activity =new Intent( this .getApplicationContext(), MainActivity. class );
PendingIntent pending_intent_main_activity = PendingIntent.getActivity(this , 0,
intent_main_activity, 0);
Notification notification_popup =new Notification.Builder( this )
.setContentTitle("An alarm is going off!" )
.setContentText("Click me!" )
.setSmallIcon(R.drawable.ic_action_call)
.setContentIntent(pending_intent_main_activity)
.setAutoCancel(true )
.build();
assert state !=null ;
switch (state) {
case "alarm on" :
startId = 1;
break ;
case "alarm off" :
startId = 0;
Log.e("Start ID is " , state);
break ;
default :
startId = 0;
break ;
}
if (! this .isRunning && startId == 1) {
Log.e("there is no music, " , "and you want start" );
this .isRunning = true ;
this .startId = 0;
notify_manager.notify(0, notification_popup);
if (whale_sound_choice == 0) {
int minimum_number = 1;
int maximum_number = 13;
Random random_number =new Random();
int whale_number = random_number.nextInt(maximum_number + minimum_number);
Log.e("random number is " , String.valueOf(whale_number));
if (whale_number == 1) {
media_song = MediaPlayer.create(this , R.raw.humpback_bubblenet_and_vocals);
media_song.start();
}
else if (whale_number == 2) {
media_song = MediaPlayer.create(this , R.raw.humpback_contact_call_moo);
media_song.start();
}
else if (whale_number == 3) {
media_song = MediaPlayer.create(this , R.raw.humpback_contact_call_whup);
media_song.start();
}
else if (whale_number == 4) {
media_song = MediaPlayer.create(this , R.raw.humpback_feeding_call);
media_song.start();
}
else if (whale_number == 5) {
media_song = MediaPlayer.create(this , R.raw.humpback_flipper_splash);
media_song.start();
}
else if (whale_number == 6) {
media_song = MediaPlayer.create(this , R.raw.humpback_tail_slaps_with_propeller_whine);
media_song.start();
}
else if (whale_number == 7) {
media_song = MediaPlayer.create(this , R.raw.humpback_whale_song);
media_song.start();
}
else if (whale_number == 8) {
media_song = MediaPlayer.create(this , R.raw.humpback_whale_song_with_outboard_engine_noise);
media_song.start();
}
else if (whale_number == 9) {
media_song = MediaPlayer.create(this , R.raw.humpback_wheeze_blows);
media_song.start();
}
else if (whale_number == 10) {
media_song = MediaPlayer.create(this , R.raw.killerwhale_echolocation_clicks);
media_song.start();
}
else if (whale_number == 11) {
media_song = MediaPlayer.create(this , R.raw.killerwhale_offshore);
media_song.start();
}
else if (whale_number == 12) {
media_song = MediaPlayer.create(this , R.raw.killerwhale_resident);
media_song.start();
}
else if (whale_number == 13) {
media_song = MediaPlayer.create(this , R.raw.killerwhale_transient);
media_song.start();
}
else {
media_song = MediaPlayer.create(this , R.raw.killerwhale_resident);
media_song.start();
}
}
else if (whale_sound_choice == 1) {
media_song = MediaPlayer.create(this , R.raw.humpback_bubblenet_and_vocals);
media_song.start();
}
else if (whale_sound_choice == 2) {
media_song = MediaPlayer.create(this , R.raw.humpback_contact_call_moo);
media_song.start();
}
else if (whale_sound_choice == 3) {
media_song = MediaPlayer.create(this , R.raw.humpback_contact_call_whup);
media_song.start();
}
else if (whale_sound_choice == 4) {
media_song = MediaPlayer.create(this , R.raw.humpback_feeding_call);
media_song.start();
}
else if (whale_sound_choice == 5) {
media_song = MediaPlayer.create(this , R.raw.humpback_flipper_splash);
media_song.start();
}
else if (whale_sound_choice == 6) {
media_song = MediaPlayer.create(this , R.raw.humpback_tail_slaps_with_propeller_whine);
media_song.start();
}
else if (whale_sound_choice == 7) {
media_song = MediaPlayer.create(this , R.raw.humpback_whale_song);
media_song.start();
}
else if (whale_sound_choice == 8) {
media_song = MediaPlayer.create(this , R.raw.humpback_whale_song_with_outboard_engine_noise);
media_song.start();
}
else if (whale_sound_choice == 9) {
media_song = MediaPlayer.create(this , R.raw.humpback_wheeze_blows);
media_song.start();
}
else if (whale_sound_choice == 10) {
media_song = MediaPlayer.create(this , R.raw.killerwhale_echolocation_clicks);
media_song.start();
}
else if (whale_sound_choice == 11) {
media_song = MediaPlayer.create(this , R.raw.killerwhale_offshore);
media_song.start();
}
else if (whale_sound_choice == 12) {
media_song = MediaPlayer.create(this , R.raw.killerwhale_resident);
media_song.start();
}
else if (whale_sound_choice == 13) {
media_song = MediaPlayer.create(this , R.raw.killerwhale_transient);
media_song.start();
}
else {
media_song = MediaPlayer.create(this , R.raw.killerwhale_resident);
media_song.start();
}
}
else if ( this .isRunning && startId == 0) {
Log.e("there is music, " , "and you want end" );
media_song.stop();
media_song.reset();
this .isRunning = false ;
this .startId = 0;
}
else if (! this .isRunning && startId == 0) {
Log.e("there is no music, " , "and you want end" );
this .isRunning = false ;
this .startId = 0;
}
else if ( this .isRunning && startId == 1) {
Log.e("there is music, " , "and you want start" );
this .isRunning = true ;
this .startId = 1;
}
else {
Log.e("else " , "somehow you reached this" );
}
return START_NOT_STICKY;
}
@Override
public void onDestroy() {
Log.e("on Destroy called" , "ta da" );
super .onDestroy();
this .isRunning = false ;
}
}

Step 11

Create a new dimens.xml file into the values folder (File ⇒ New ⇒Activity⇒Empty_activity).

Go to dimens.xml then click the text bottom. This xml file contains the designing code for the android app. Into the dimens.xml copy and paste the below code.

dimens.xml code

<resources>
<dimen name="activity_horizontal_margin" >16dp</dimen>
<dimen name="activity_vertical_margin" >16dp</dimen>
<dimen name="fab_margin" >16dp</dimen>
</resources>

Step 12

Create one folder into the Resources folder. Paste your set of ringtones into the folder.

Step 13

Create new strings.xml file into the Values folder (File ⇒ New ⇒Activity⇒Empty_activity).

Go to strings.xml and click the text button. This XML file contains the designing code for the Android app. Into the strings.xml,copy and paste the below code.

strings.xml code

<resources>
<string name="app_name" >Alarm Clock</string>
<string name="action_settings" >Settings</string>
<string-array name="whale_array" >
<item>Pick a whale sound!</item>
<item>Humpback bubble net</item>
<item>Humpback contact Call Moo</item>
<item>Humpback contact Call Whup</item>
<item>Humpback feeding Call</item>
<item>Humpback flipper splash</item>
<item>Humpback Tail slaps</item>
<item>Humpback whale song</item>
<item>Humpback whale songwith outboard engine</item>
<item>Humpback wheeze blows</item>
<item>Killer whale echolocation clicks</item>
<item>Killer whale offshore</item>
<item>Killer whale resident</item>
<item>Killer whaletransient </item>
</string-array>
</resources>

Step 14

Click the Make Project option and run.

Android

Deliverables

Here, we have successfully created an Alarm Android application.

Alarm app in Android

Android

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