I have done an application that fire an alarm in certain time, and i am stuck on implementing remind me after half an hour functionality
what can i do to implement receiver, or service or anything that runs after half an hour of clicking the button of reming me after half an hour
any suggestions ?
Edited the code from Android execute a function after 1 hour to half an hour.
// the scheduler
protected FunctionEveryHalfHour scheduler;
// method to schedule your actions
private void scheduleEveryHalfHour(){
PendingIntent pendingIntent = PendingIntent.getBroadcast(this, 0,
new Intent(WAKE_UP_AFTER_HALF_HOUR),
PendingIntent.FLAG_UPDATE_CURRENT);
// wake up time every 1 hour
Calendar wakeUpTime = Calendar.getInstance();
wakeUpTime.add(Calendar.SECOND, 30 * 60);
AlarmManager aMgr = (AlarmManager) getSystemService(ALARM_SERVICE);
aMgr.set(AlarmManager.RTC_WAKEUP,
wakeUpTime.getTimeInMillis(),
pendingIntent);
}
//put this in the creation of service or if service is running long operations put this in onStartCommand
scheduler = new FunctionEveryHalfHour();
registerReceiver(scheduler , new IntentFilter(WAKE_UP_AFTER_HALF_HOUR));
// broadcastreceiver to handle your work
class FunctionEveryHalfHour extends BroadcastReceiver{
#Override
public void onReceive(Context context, Intent intent) {
// if phone is lock use PowerManager to acquire lock
// your code to handle operations every half hour...
// after that call again your method to schedule again
// if you have boolean if the user doesnt want to continue
// create a Preference or store it and retrieve it here like
boolean mContinue = getUserPreference(USER_CONTINUE_OR_NOT);//
if(mContinue){
scheduleEveryHalfHour();
}
}
}
You can write a simple service with a timer and whenever the time is up.it can do your thing.all you need to do is start a service with a timer inside of it
Related
I have an android application where I am storing user's data on database when he/she activates the app. My app requires the user to stop the application manually in order to remove its entry from the database and along with that other services which keep running when the app is activated.
So I want to write a function which will be executed after every hour (when the app is activated) and will give a notification to user just to remind him/her about the service which is running .If the user had forgot to stop the service then they can stop it or continue with service.
What is the best efficient way of doing this. I dont want to drain too much of battery with thihs 1 hour basis check if the user considers it to run for a day or so. Please advice. Thanks :)
I suggest the code will be like this.
// the scheduler
protected FunctionEveryHour scheduler;
// method to schedule your actions
private void scheduleEveryOneHour(){
PendingIntent pendingIntent = PendingIntent.getBroadcast(this, 0,
new Intent(WAKE_UP_AFTER_ONE_HOUR),
PendingIntent.FLAG_UPDATE_CURRENT);
// wake up time every 1 hour
Calendar wakeUpTime = Calendar.getInstance();
wakeUpTime.add(Calendar.SECOND, 60 * 60);
AlarmManager aMgr = (AlarmManager) getSystemService(ALARM_SERVICE);
aMgr.set(AlarmManager.RTC_WAKEUP,
wakeUpTime.getTimeInMillis(),
pendingIntent);
}
//put this in the creation of service or if service is running long operations put this in onStartCommand
scheduler = new FunctionEveryHour();
registerReceiver(scheduler , new IntentFilter(WAKE_UP_AFTER_ONE_HOUR));
// broadcastreceiver to handle your work
class FunctionEveryHour extends BroadcastReceiver{
#Override
public void onReceive(Context context, Intent intent) {
// if phone is lock use PowerManager to acquire lock
// your code to handle operations every one hour...
// after that call again your method to schedule again
// if you have boolean if the user doesnt want to continue
// create a Preference or store it and retrieve it here like
boolean mContinue = getUserPreference(USER_CONTINUE_OR_NOT);//
if(mContinue){
scheduleEveryOneHour();
}
}
}
hope that helps :)
Use AlarmManager refer this and tutorial with PendingIntent
Try this way,hope this will help you to solve your problem.
new Timer().scheduleAtFixedRate(task, after, interval);
In my app, I need to add a row to a database and simultaniously set up an Alarm event to repeat every day at the time specified in one of the database columns. I already have some code, but it doesent trigger the alarm event at the specified time. Here is my code:
public class Add_reminder extends Activity {
AlarmManager am;
int hours, minutes;
REMIND_DB db;
Calendar calendar;
Cursor cursor;
Button button;
public void onCreate(Bundle savedInstanceState) {
//The usual code in the beginning of onCreate
//I load db from extended Application class as global since i use it in more
//Activities. Ints hours and minutes is set by user interaction
calendar = Calendar.getInstance();
am = (AlarmManager) getSystemService(ALARM_SERVICE);
button.setOnClickListener(new View.OnClickListener() {
public void onClick(View v) {
db.open();
db.insertReminder( -- parameters for database --);
cursor = db.getAllReminders();
cursor.moveToLast();
calendar.set(Calendar.HOUR, hours);
calendar.set(Calendar.MINUTE, minutes);
Intent intent = new Intent(Add_reminder.this, ReminderAlarm.class);
intent.putExtra("id_of_db_row", cursor.getInt(0));
PendingIntent pi = PendingIntent.getActivity(Add_reminder.this,
cursor.getInt(0), intent, PendingIntent.FLAG_CANCEL_CURRENT);
am.setRepeating(AlarmManager.RTC_WAKEUP, calendar.getTimeInMillis(),
24*3600*1000, pi);
db.close()
}
});
}
}
Database is updated correctly, but the ReminderActivity never starts on specified time. I dont know what could be wrong. I saw some example codes using BroadcastReceiver instead of starting the Activity right on with the PendingIntent, but this should work too, right? Does anyone knows what could be wrong?
My second question is if Im going to need the same instance of AlarmManager when I want to add or remove some alarms from a different Activity, or do I just declare another AlarmManager in every Activity I need?
Thank you!
You should use a broadcast receiver for alarms, and then start a service that does the actual work. Broadcast receivers shouldn't block the UI thread with lengthy operations (such as writing to the DB). Additionally, 'once a day' alarms might be problematic: if the user reboots the phone: registered alarms will be lost. You need to:
save the time the alarm is supposed to run to, say, SharedPreferecnes
re-register your alarm when the phone boots (receive the BOOT_COMPLETED broadcast)
don't use setRepeating() but let each alarm register the next on
Using a shorter period (1 or 2 minutes) for testing also helps.
As for the AlarmManager instance, it's a system service, you don't need to care about what instance you are using. Just get it using getSystemService()
I have set a AlarmManager which will give alarm repeatedly after certain time. I used following code for that.
Intent intent = new Intent(ViewDoughnut.this, NotificationMessage.class);
PendingIntent sender = PendingIntent.getBroadcast(ViewDoughnut.this, 0, intent,PendingIntent.FLAG_CANCEL_CURRENT);
AlarmManager am = (AlarmManager) getSystemService(ALARM_SERVICE);
am.setRepeating(AlarmManager.RTC_WAKEUP,nextAlarmTime, alarmInterval, sender);
Now to execute proper work at the alarm time I have created the following class extending BroadcastReceiver. Now I need the time in millisecond when the Alarm work should execute in that class. How to get it?
public class NotificationMessage extends BroadcastReceiver {
// Display an alert that we've received a message.
// #Override
public void onReceive(Context context, Intent intent) {
// here I need the time when the alarm should execute.
}
}
Here I like to add, system time is not working for me, because if the device is switch off at the alarm time, it execute that when the device is on after that time. But I need the time when it should execute.
You could create a class that derives from Application which holds all global variables. Then just set a long variable to hold the time before initialising the alarm
I am new to Android. I am trying to develop an Alarm Application, which is actually a speaking clock. I just want the clock to use TextToSpeech API and speak out the greeting stuff and the current time as soon as the alarm time is ticked. The speech part is done. And now I want to implement the Alarm functionality. But Initially I am just trying to display a toast after 10 secs in order to check whether my classes are working properly. And I am not getting the desired response and I don't know why ? Following are the classes
Main Class aClockActivity
public class aClockActivity extends Activity {
/** Called when the activity is first created. */
private PendingIntent mAlarmSender;
#Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.main);
Button button1 = (Button)findViewById(R.id.buttonOn);
button1.setOnClickListener(mStartAlarmListener);
Button button2 = (Button)findViewById(R.id.buttonOff);
button2.setOnClickListener(mStopAlarmListener);
}
private OnClickListener mStartAlarmListener = new OnClickListener() {
public void onClick(View v) {
// We want the alarm to go off 30 seconds from now.
//long firstTime = SystemClock.elapsedRealtime();
EditText Ehour = (EditText) findViewById(R.id.hour);
EditText Eminute = (EditText) findViewById(R.id.minute);
CharSequence CharHour = Ehour.getText();
CharSequence CharMinute = Eminute.getText();
int hour = Integer.parseInt(CharHour.toString());
int minute = Integer.parseInt(CharMinute.toString());
Calendar cal = Calendar.getInstance();
cal.setTimeInMillis(System.currentTimeMillis());
// calendar.add(Calendar.MINUTE, 1);
cal.add(Calendar.SECOND, 10);
mAlarmSender = PendingIntent.getBroadcast(aClockActivity.this,
0, new Intent(aClockActivity.this, Alarm_Broadcast.class), 0);
// Schedule the alarm!
AlarmManager am = (AlarmManager)getSystemService(ALARM_SERVICE);
am.set(AlarmManager.RTC_WAKEUP,
cal.getTimeInMillis(), mAlarmSender);
// Tell the user about what we did.
Toast.makeText(aClockActivity.this, "The Alarm is Set",
Toast.LENGTH_LONG).show();
}
};
private OnClickListener mStopAlarmListener = new OnClickListener() {
public void onClick(View v) {
// And cancel the alarm.
AlarmManager am = (AlarmManager)getSystemService(ALARM_SERVICE);
am.cancel(mAlarmSender);
// Tell the user about what we did.
Toast.makeText(aClockActivity.this, "Setting off the alarm",
Toast.LENGTH_LONG).show();
}
};
Second Class Alarm_Broadcast
public class Alarm_Broadcast extends BroadcastReceiver{
#Override
public void onReceive(Context context, Intent intent) {
Toast.makeText(context, "Alarm worked", Toast.LENGTH_LONG).show();
}
}
Note: Just ignore the Edittext part in the OnClick() method, I'd use it later on.
Apart from the above problem there are few questions that I would like to ask.
1) How can I implement this app so that when the alarm is set, it can actually run as a service in the notification bar where the original AlarmClock runs. So that even if the app is closed its still running to invoke the alarm message at the right time.
2) I cannot show any Dialog box or can use TTS if the AlarmManager invokes a Class that extends either Service or BroadcastReciever.
3) I would appreciate if some one give me the idea to implement this app, I am sure there are many experts who would have gone through the same application.
Regards
Omayr
Here is some sample code i used in an alarm clock app hope it helps.
To set the alarm:
private void setAlarm(){
Context context = getApplicationContext();
AlarmManager mgr = (AlarmManager)context.getSystemService(Context.ALARM_SERVICE);
Intent i = new Intent(context, OnAlarmReceiver.class);
PendingIntent pi = PendingIntent.getBroadcast(context, 0, i, 0);
myCal = Calendar.getInstance();
myCal.setTimeInMillis(TIME_THE_ALARM_SHOULD_GO_OFF_AS_A_LONG);
mgr.set(AlarmManager.RTC_WAKEUP, myCal.getTimeInMillis(), pi);
Log.i(myTag, "alarm set for " + myCal.getTime().toLocaleString());
Toast.makeText(getApplicationContext(),"Alarm set for " + myCal.getTime().toLocaleString(), Toast.LENGTH_LONG).show();
}
This goes in the onAlarmReceiver class:
public void onReceive(Context context, Intent intent) {
Intent i = new Intent(context, AlarmActivity.class);
i.addFlags(Intent.FLAG_ACTIVITY_NEW_TASK);
context.startActivity(i);
}
this will start AlarmActivity whenever it needs to go off. In your case you'd put the toast and speech into the AlarmActivity.
How can I implement this app so that when the alarm is set, it can actually run as a service in the notification bar where the original AlarmClock runs. So that even if the app is closed its still running to invoke the alarm message at the right time.
Do not do this. Having a service stick around in memory 24x7 to watch a clock is a waste of RAM and will get you attacked by task killers, reducing your app's effectiveness. Please stick with AlarmManager.
I cannot show any Dialog box or can use TTS if the AlarmManager invokes a Class that extends either Service or BroadcastReciever.
Start an activity, perhaps a dialog-themed activity.
Just got the answer, whatever service, receiver, activity and etc you are using, you need to register it in your AndroidManifest.xml. Or else it wont work
I changed AlarmController.java in ApiDemo a little bit, so I want the alarm not to go off when the phone is sleeping by using AlarmManager.RTC.
Intent intent = new Intent(AlarmController.this, RepeatingAlarm.class);
PendingIntent sender = PendingIntent.getBroadcast(AlarmController.this,
0, intent, 0);
// We want the alarm to go off 30 seconds from now.
long firstTime = SystemClock.elapsedRealtime();
firstTime += 15*1000;
// Schedule the alarm!
AlarmManager am = (AlarmManager)getSystemService(ALARM_SERVICE);
am.setRepeating(AlarmManager.RTC, //AlarmManager.ELAPSED_REALTIME_WAKEUP,
firstTime, 15*1000, sender);
The receiver code is like below:
public class RepeatingAlarm extends BroadcastReceiver
{
#Override
public void onReceive(Context context, Intent intent)
{
Log.d("DEBUG", "In RepeatingAlarm.onReceive, intent=" + intent);
Toast.makeText(context, R.string.repeating_received, Toast.LENGTH_SHORT).show();
}
}
I ran the modified app, but I still see many log messages as below after the phone wento sleep (the screen was black):
D/DEBUG ( 1390): In RepeatingAlarm.onReceive, intent=Intent { flg=0x4 cmp=com.example.android.apis/.app.RepeatingAlarm (has extras) }
This means the flag AlarmManager.RTC didn't work. Can someone tell me why?
Thanks.
Since you are using elapsedRealtime to get the alarm start time, I think you need to use the ELAPSED_REALTIME flag instead of the RTC flag.
My guess is that the alarm manager is thinking it's missed a ton of alarms because you are using the RTC flag which means the alarm manager is expecting you to send a time value in milliseconds since Jan 1st 1970, but instead you are sending elapsed milliseconds since the device booted, which is going to be a much much smaller number.
If you use the RTC flags you need to use System.currentTimeMillis() or get the time in milliseconds from a Java Date or Calendar object. If you use ELAPSED_REALTIME flags then you need to use SystemClock.elapsedRealtime().