title: Android AlarmManager Alarm Not Working
body: <p>I'm trying to make a simple alarm trigger. When alarm goes off there should a a simple sound alarm. But the alarm doesn't go off, nothing happens. Now I'm not sure where am I mistaken - is it the times? Intents? Receivers?</p>
  
  <p>Class in which I'm using AlarmManager</p>
  
  <pre><code>package com.example.prva;
  
  
  import java.text.DateFormat;
  import java.util.Calendar;
  import java.util.Date;
  
  import android.app.Activity;
  import android.app.AlarmManager;
  import android.app.PendingIntent;
  import android.content.Intent;
  import android.os.Bundle;
  import android.os.Handler;
  import android.view.View;
  import android.widget.Button;
  import android.widget.TextView;
  import android.widget.TimePicker;
  
  public class Meni_Splash extends Activity{  
      Calendar c = Calendar.getInstance();
      private int hour = c.get(Calendar.HOUR_OF_DAY);
      private int minute = c.get(Calendar.MINUTE);
      int milivreme;
      int milipicker;
      long sveskupa;
      int hoursad;
      int minutesad;
      protected boolean timeactive = true;
      Handler h=new Handler();
  
  
      @Override
      protected void onCreate(Bundle savedInstanceState) {
          // TODO Auto-generated method stub
          super.onCreate(savedInstanceState);
          setContentView(R.layout.activity_main);             
          h.post(new Runnable(){
              @Override
              public void run() {
                  String currentDateTimeString = DateFormat.getDateTimeInstance().format(new Date());
                  TextView text = (TextView) findViewById(R.id.textDate);
                  text.setText(currentDateTimeString);
                  h.postDelayed(this, 1000);
              }
          });     
  
  
          final TimePicker picker = (TimePicker) findViewById(R.id.timePicker);
          final TextView text = (TextView) findViewById(R.id.texttime);
  
          picker.setIs24HourView(true);       
          picker.setCurrentHour(hour);
          picker.setCurrentMinute(minute);
  
          Button btnt = (Button) findViewById(R.id.buttontime);       
  
  
  
          btnt.setOnClickListener(new View.OnClickListener() {
  
  
              @Override
              public void onClick(View arg0) {
                  // TODO Auto-generated method stub
                  hoursad = picker.getCurrentHour();
                  minutesad = picker.getCurrentMinute();
                  milipicker = (((hoursad) * 60 * 60 * 1000) + ((minutesad) * 60 * 1000));
                  text.setText(new StringBuilder().append(hoursad).append(":").append(minutesad).append( "Trenutno vrijeme u milisekundama : ").append(System.currentTimeMillis()).append(" vrijeme izabrano u milisekundama sve skupa ").append(milipicker));
              }
          });
  
          Button btnalarm = (Button) findViewById(R.id.btnalarm);
          btnalarm.setOnClickListener(new View.OnClickListener() {
  
              @Override
              public void onClick(View v) {
                  // TODO Auto-generated method stub
                  hoursad = picker.getCurrentHour();
                  minutesad = picker.getCurrentMinute();
                  milivreme = (((hour)* 60 * 60 * 1000)+ ((minute) * 60 * 1000));     
                  milipicker = (((hoursad) * 60 * 60 * 1000) + ((minutesad) * 60 * 1000));
                  sveskupa = milipicker - milivreme;
  
                  Intent intent = new Intent(Meni_Splash.this, AlarmReceiver.class);
                  PendingIntent pendingintent = PendingIntent.getActivity(Meni_Splash.this, 2, intent, PendingIntent.FLAG_CANCEL_CURRENT);
  
                  AlarmManager am = (AlarmManager) getSystemService(ALARM_SERVICE);
                  am.set(AlarmManager.RTC_WAKEUP, System.currentTimeMillis() + sveskupa, pendingintent);                      
  
              }
          });
  
          Button btnv = (Button) findViewById(R.id.buttonv);
          btnv.setOnClickListener(new View.OnClickListener() {
  
              @Override
              public void onClick(View v) {
                  // TODO Auto-generated method stub
                  startActivity(new Intent(Meni_Splash.this, button.class));              
              }
          });             
      }   
  }
  </code></pre>
  
  <p>AlarmReceiver class :</p>
  
  <pre><code>package com.example.prva;
  
  import android.app.Activity;
  import android.media.MediaPlayer;
  import android.os.Bundle;
  
  
  public class AlarmReceiver extends Activity {
      protected MediaPlayer MPAlarm;
  
      @Override
      protected void onCreate(Bundle savedInstanceState) {
          // TODO Auto-generated method stub
          super.onCreate(savedInstanceState);
          MPAlarm = MediaPlayer.create(this, R.raw.splash);
          MPAlarm.start();
      }
  
  
  
  
  };
  </code></pre>