package="com.junk.alarm"

import android.os.Bundle;
import android.provider.AlarmClock;
import android.app.Activity;
import android.content.Intent;
import android.view.Menu;
import android.app.AlarmManager;
import android.app.PendingIntent;
import android.content.*;

public class MainActivity extends Activity {

@Override
protected void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    setContentView(R.layout.activity_main);
    Intent i = new Intent(AlarmClock.ACTION_SET_ALARM);
    i.putExtra(AlarmClock.EXTRA_MESSAGE, "New Alarm");
    i.putExtra(AlarmClock.EXTRA_HOUR, 11);
    i.putExtra(AlarmClock.EXTRA_MINUTES, 20);
    i.putExtra(AlarmClock.EXTRA_SKIP_UI,true);
    int rc = 0;
    startActivityForResult(i,rc);
    try {
            Thread.sleep(5000);
        } catch (InterruptedException e) {
            e.printStackTrace();
        }
    Context context = getApplicationContext();
    PendingIntent mpi = PendingIntent.getActivity(context,rc,i,0);
    AlarmManager am = (AlarmManager)context.getSystemService(context.ALARM_SERVICE);
    am.cancel(mpi);
    finish();

}

@Override
public boolean onCreateOptionsMenu(Menu menu) {
    // Inflate the menu; this adds items to the action bar if it is present.
    getMenuInflater().inflate(R.menu.main, menu);
    return true;
}

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

<uses-permission android:name="com.android.alarm.permission.SET_ALARM" />

<uses-sdk
    android:minSdkVersion="8"
    android:targetSdkVersion="18" />

<application
    android:allowBackup="true"
    android:icon="@drawable/ic_launcher"
    android:label="@string/app_name"
    android:theme="@android:style/Theme.NoDisplay" >
    <activity
        android:name="com.poisson.hotalarm.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>
</application>

<RelativeLayout 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:paddingBottom="@dimen/activity_vertical_margin"
    android:paddingLeft="@dimen/activity_horizontal_margin"
    android:paddingRight="@dimen/activity_horizontal_margin"
    android:paddingTop="@dimen/activity_vertical_margin"
    tools:context=".MainActivity" >

    <TextView
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:text="@string/hello_world" />

</RelativeLayout>