Nomar Ramon Nomar Ramon - 2 months ago 9
Android Question

How can I make this Alarm Clock app. to be able to set alarm at any time of the day and exactly at that time?

I am new to android development and have very little knowledge in java and I have seen this Alarm Clock app tutorial in the internet. The application has problems. It can't set time before the current time of phone and it doesn't start at the exact time. How to make this application so it can set alarm within 24 hours and at the exact time?

AlarmActivity.java

package com.javapapers.androidalarmclock;

import android.app.Activity;
import android.app.AlarmManager;
import android.app.PendingIntent;
import android.content.Intent;
import android.os.Bundle;
import android.util.Log;
import android.view.View;
import android.widget.TextView;
import android.widget.TimePicker;
import android.widget.ToggleButton;

import java.util.Calendar;

public class AlarmActivity extends Activity {

AlarmManager alarmManager;
private PendingIntent pendingIntent;
private TimePicker alarmTimePicker;
private static AlarmActivity inst;
private TextView alarmTextView;

public static AlarmActivity instance() {
return inst;
}

@Override
public void onStart() {
super.onStart();
inst = this;
}

@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_my);
alarmTimePicker = (TimePicker) findViewById(R.id.alarmTimePicker);
alarmTextView = (TextView) findViewById(R.id.alarmText);
ToggleButton alarmToggle = (ToggleButton) findViewById(R.id.alarmToggle);
alarmManager = (AlarmManager) getSystemService(ALARM_SERVICE);
}

public void onToggleClicked(View view) {
if (((ToggleButton) view).isChecked()) {
Log.d("MyActivity", "Alarm On");
Calendar calendar = Calendar.getInstance();
calendar.set(Calendar.HOUR_OF_DAY, alarmTimePicker.getCurrentHour());
calendar.set(Calendar.MINUTE, alarmTimePicker.getCurrentMinute());
Intent myIntent = new Intent(AlarmActivity.this, AlarmReceiver.class);
pendingIntent = PendingIntent.getBroadcast(AlarmActivity.this, 0, myIntent, 0);
alarmManager.set(AlarmManager.RTC, calendar.getTimeInMillis(), pendingIntent);
} else {
alarmManager.cancel(pendingIntent);
setAlarmText("");
Log.d("MyActivity", "Alarm Off");
}
}

public void setAlarmText(String alarmText) {
alarmTextView.setText(alarmText);
}
}


AlarmReceiver.java

package com.javapapers.androidalarmclock;

import android.app.Activity;
import android.content.ComponentName;
import android.content.Context;
import android.content.Intent;
import android.media.Ringtone;
import android.media.RingtoneManager;
import android.net.Uri;
import android.support.v4.content.WakefulBroadcastReceiver;

public class AlarmReceiver extends WakefulBroadcastReceiver {

@Override
public void onReceive(final Context context, Intent intent) {
//this will update the UI with message
AlarmActivity inst = AlarmActivity.instance();
inst.setAlarmText("Alarm! Wake up! Wake up!");

//this will sound the alarm tone
//this will sound the alarm once, if you wish to
//raise alarm in loop continuously then use MediaPlayer and setLooping(true)
Uri alarmUri = RingtoneManager.getDefaultUri(RingtoneManager.TYPE_ALARM);
if (alarmUri == null) {
alarmUri = RingtoneManager.getDefaultUri(RingtoneManager.TYPE_NOTIFICATION);
}
Ringtone ringtone = RingtoneManager.getRingtone(context, alarmUri);
ringtone.play();

//this will send a notification message
ComponentName comp = new ComponentName(context.getPackageName(),
AlarmService.class.getName());
startWakefulService(context, (intent.setComponent(comp)));
setResultCode(Activity.RESULT_OK);
}
}


AlarmService.java

package com.javapapers.androidalarmclock;

import android.app.IntentService;
import android.app.NotificationManager;
import android.app.PendingIntent;
import android.content.Context;
import android.content.Intent;
import android.support.v4.app.NotificationCompat;
import android.util.Log;

public class AlarmService extends IntentService {
private NotificationManager alarmNotificationManager;

public AlarmService() {
super("AlarmService");
}

@Override
public void onHandleIntent(Intent intent) {
sendNotification("Wake Up! Wake Up!");
}

private void sendNotification(String msg) {
Log.d("AlarmService", "Preparing to send notification...: " + msg);
alarmNotificationManager = (NotificationManager) this
.getSystemService(Context.NOTIFICATION_SERVICE);

PendingIntent contentIntent = PendingIntent.getActivity(this, 0,
new Intent(this, AlarmActivity.class), 0);

NotificationCompat.Builder alamNotificationBuilder = new NotificationCompat.Builder(
this).setContentTitle("Alarm").setSmallIcon(R.drawable.ic_launcher)
.setStyle(new NotificationCompat.BigTextStyle().bigText(msg))
.setContentText(msg);


alamNotificationBuilder.setContentIntent(contentIntent);
alarmNotificationManager.notify(1, alamNotificationBuilder.build());
Log.d("AlarmService", "Notification sent.");
}
}


Please Help! I am desperate.

Answer

If you want to have a 24hour span, you also need to set the day, that's why you can't set the time before the current time of the phone.

Calendar calendar = Calendar.getInstance();
calendar.set(Calendar.HOUR_OF_DAY, alarmTimePicker.getCurrentHour());
calendar.set(Calendar.MINUTE, alarmTimePicker.getCurrentMinute());
if(calendar.getTimeInMillis() < System.currentTimeMillis())
       calendar.add(Calendar.DAY, 1);
Comments