This video shows complete steps and demo to design and develop an Alarm clock App using Android Studio.

[Source Code]

package com.example.maalarm.myalarm;

import android.media.Ringtone;
import android.media.RingtoneManager;
import android.support.v7.app.AppCompatActivity;
import android.os.Bundle;
import android.widget.TextClock;
import android.widget.TimePicker;

import java.util.Timer;
import java.util.TimerTask;

public class MainActivity extends AppCompatActivity {

TimePicker alarmTime;
TextClock currentTime;

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

alarmTime = findViewById(R.id.timePicker);
currentTime = findViewById(R.id.textClock);
final Ringtone r = RingtoneManager.getRingtone(getApplicationContext(), RingtoneManager.getDefaultUri(RingtoneManager.TYPE_RINGTONE));

Timer t = new Timer();
t.scheduleAtFixedRate(new TimerTask() {
@Override
public void run() {

if (currentTime.getText().toString().equals(AlarmTime())){
r.play();
}else{
r.stop();
}
}
}, 0, 1000);
}

public String AlarmTime(){

Integer alarmHours = alarmTime.getCurrentHour();
Integer alarmMinutes = alarmTime.getCurrentMinute();
String stringAlarmMinutes;

if (alarmMinutes<10){
stringAlarmMinutes = “0”;
stringAlarmMinutes = stringAlarmMinutes.concat(alarmMinutes.toString());
}else{
stringAlarmMinutes = alarmMinutes.toString();
}
String stringAlarmTime;

if(alarmHours>12){
alarmHours = alarmHours – 12;
stringAlarmTime = alarmHours.toString().concat(“:”).concat(stringAlarmMinutes).concat(” PM”);
}else{
stringAlarmTime = alarmHours.toString().concat(“:”).concat(stringAlarmMinutes).concat(” AM”);
}
return stringAlarmTime;
}
}

<?xml version=”1.0″ encoding=”utf-8″?>
<manifest xmlns:android=”http://schemas.android.com/apk/res/android&#8221;
package=”com.example.maalarm.myalarm”>

<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=”.MainActivity”>
<intent-filter>
<action android:name=”android.intent.action.MAIN” />

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

</manifest>

<?xml version=”1.0″ encoding=”utf-8″?>
<RelativeLayout xmlns:android=”http://schemas.android.com/apk/res/android&#8221;
xmlns:app=”http://schemas.android.com/apk/res-auto&#8221;
xmlns:tools=”http://schemas.android.com/tools&#8221;
android:layout_width=”match_parent”
android:layout_height=”match_parent”
tools:context=”com.example.maalarm.myalarm.MainActivity”>

<TimePicker
android:id=”@+id/timePicker”
android:layout_width=”300dp”
android:layout_height=”wrap_content”
android:layout_alignParentBottom=”true”
android:layout_centerHorizontal=”true” />

<TextClock
android:id=”@+id/textClock”
android:layout_width=”150dp”
android:layout_height=”80dp”
android:layout_alignParentTop=”true”
android:layout_centerHorizontal=”true”
android:layout_marginTop=”37dp” />
</RelativeLayout>

Top posts/ comments from YouTube channel

Time picker is gone from palette. What to do?

 

Oh … yes. Wow. So, it seems like google has removed the Date Time option from the palette of Android Studio from version 3.1. It was there in 3.0. Anyway, this issue has been discussed on other forums as well.

The only workaround which I can think of is to manually add the time picker and time clock code in the XML format (text file).

I am copying the snippet below which can be used in the layout XML file:

<TimePicker
android:id=”@+id/timePicker”
android:layout_width=”300dp”
android:layout_height=”wrap_content”
android:layout_alignParentBottom=”true”
android:layout_centerHorizontal=”true” />

<TextClock
android:id=”@+id/textClock”
android:layout_width=”150dp”
android:layout_height=”80dp”
android:layout_alignParentTop=”true”
android:layout_centerHorizontal=”true”
android:layout_marginTop=”37dp” />

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