Alarm.java

Alarm.java

import java.util.Calendar;

import android.app.Activity;
import android.app.AlarmManager;
import android.app.PendingIntent;
import android.app.TimePickerDialog;
import android.app.TimePickerDialog.OnTimeSetListener;
import android.content.Context;
import android.content.Intent;
import android.os.Bundle;
import android.view.View;
import android.view.View.OnClickListener;
import android.widget.Button;
import android.widget.TextView;
import android.widget.TimePicker;
import android.widget.Toast;

public class Alarm extends Activity {

    TimePicker TimePicker;
    Button Setalarm;

    TimePickerDialog timePickerDialog;

    final static int RQS_1 = 1;

    /** Called when the activity is first created. */
    @Override
    public void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_alarm);

        Setalarm = (Button) findViewById(R.id.Setalarm);
        Setalarm.setOnClickListener(new OnClickListener() {

            @Override
            public void onClick(View v) {

                openTimePickerDialog(false);

            }
        });

    }

    private void openTimePickerDialog(boolean is24r) {
        Calendar calendar = Calendar.getInstance();
        timePickerDialog = new TimePickerDialog(Alarm.this, onTimeSetListener,
                calendar.get(Calendar.HOUR_OF_DAY),
                calendar.get(Calendar.MINUTE), is24r);
        timePickerDialog.setTitle("Set Alarm");

        timePickerDialog.show();

    }

    OnTimeSetListener onTimeSetListener = new OnTimeSetListener() {
        @Override
        public void onTimeSet(TimePicker view, int hourOfDay, int minute) {

            Calendar calNow = Calendar.getInstance();
            Calendar calSet = (Calendar) calNow.clone();

            calSet.set(Calendar.HOUR_OF_DAY, hourOfDay);
            calSet.set(Calendar.MINUTE, minute);
            calSet.set(Calendar.SECOND, 0);
            calSet.set(Calendar.MILLISECOND, 0);

            if (calSet.compareTo(calNow) <= 0) {

                calSet.add(Calendar.DATE, 1);
            }

            setAlarm(calSet);
        }
    };

    private void setAlarm(Calendar targetCal) {

        //
        Toast.makeText(Alarm.this, "Alarm is set at" + targetCal.getTime(),
                Toast.LENGTH_LONG).show();
        Intent intent = new Intent(getBaseContext(), AlarmReceiver.class);
        PendingIntent pendingIntent = PendingIntent.getBroadcast(
                getBaseContext(), RQS_1, intent, 0);
        AlarmManager alarmManager = (AlarmManager) getSystemService(Context.ALARM_SERVICE);
        alarmManager.set(AlarmManager.RTC_WAKEUP, targetCal.getTimeInMillis(),
                pendingIntent);

    }

}




AlarmReceiver.java

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

public class AlarmReceiver extends BroadcastReceiver {

    @Override
    public void onReceive(Context arg0, Intent arg1) {
        Toast.makeText(arg0, "Your Time is up!!!!!", Toast.LENGTH_LONG).show();

    }

}


activity_alarm.xml

<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
    android:layout_width="fill_parent"
    android:layout_height="fill_parent"
    android:orientation="vertical" >


    <Button
        android:id="@+id/Setalarm"
        android:layout_width="117dp"
        android:layout_height="106dp"
        android:background="@drawable/alarm" />

    <TextView
        android:id="@+id/alarmprompt"
        android:layout_width="fill_parent"
        android:layout_height="wrap_content" />
</LinearLayout>



AndroidManifest.xml

<?xml version="1.0" encoding="utf-8"?>
<manifest xmlns:android="http://schemas.android.com/apk/res/android"
    package="com.example.alarm_manager"
    android:versionCode="1"
    android:versionName="1.0" >

    <uses-sdk
        android:minSdkVersion="8"
        android:targetSdkVersion="17" />

    <application
        android:allowBackup="true"
        android:icon="@drawable/ic_launcher"
        android:label="@string/app_name"
        android:theme="@style/AppTheme" >
        <activity
            android:name="com.example.alarm_manager.Alarm"
            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="AlarmReceiver"></receiver>
    </application>

</manifest>



Screenshot