I am trying to learn the functionality of AlarmManager in android.
I am trying to call the alarm after every 10 second.But the problem is that i am getting a blank screen.Then i found that the intent which i am trying to call at the wake of alarm is not getting called.Please someone help me with this?
MainActivity.java
public class MainActivity extends AppCompatActivity {
private AlarmManager alarmMgr;
private PendingIntent alarmIntent;
#Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
alarmMgr = (AlarmManager)this.getSystemService(Context.ALARM_SERVICE);
Intent intent = new Intent(this, AlarmReceiver.class);
alarmIntent = PendingIntent.getBroadcast(this, 0, intent, 0);
Log.d("asd","initialized alarmintent");
alarmMgr.set(AlarmManager.ELAPSED_REALTIME,
SystemClock.elapsedRealtime()+10*1000, alarmIntent);
Log.d("asd", "alarm set");
}
}
AlarmReceiver.java
public class AlarmReceiver extends AppCompatActivity
{
TextView tv;
#Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.intent_layout);
Log.d("asd","writing textview");
tv=(TextView)findViewById(R.id.textview);
tv.setText("called");
}
}
You are calling PendingIntent wrong:
Intent intent = new Intent(this, AlarmReceiver.class);
alarmIntent = PendingIntent.getBroadcast(this, 0, intent, 0);
See how you are calling PendingIntent.getBroadcast(this, 0, intent, 0)
This is wrong because your AlarmReceiver is an Activity (not a BroadcastReceiver like you are telling the pending intent it is). Try calling it like this:
alarmIntent = PendingIntent.getActivity(this, 0, intent, 0);
It is just the wrong use of pending intent that is your problem :)
Here is documentation:
http://developer.android.com/reference/android/app/PendingIntent.html
EDIT: The documentation also says:
Note that the activity will be started outside of the context of an existing activity, so you must use the Intent.FLAG_ACTIVITY_NEW_TASK launch flag in the Intent.
So make sure you are doing this as well.
Related
the code to start alarmManager after 10 sec
Intent intent=new Intent(SelfUpdateByScanQrCodeEventActivity.getContext(), MainActivity.class);
intent.putExtra("startInstallUpdateApk",true);
PendingIntent pendingIntent = PendingIntent.getBroadcast(
SelfUpdateByScanQrCodeEventActivity.getContext().getApplicationContext(), createRestartAgentAlarmManagerRequestCode, intent, PendingIntent.FLAG_UPDATE_CURRENT);
AlarmManager alarmManager = (AlarmManager) SelfUpdateByScanQrCodeEventActivity.getContext().getSystemService(ALARM_SERVICE);
Calendar cal = Calendar.getInstance();
cal.add(Calendar.SECOND,delaySecTimeToRestartAgent);
if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.M) {
alarmManager.setExactAndAllowWhileIdle(AlarmManager.RTC_WAKEUP,cal.getTimeInMillis(),pendingIntent);
}else if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.KITKAT) {
alarmManager.setExact(AlarmManager.RTC_WAKEUP, cal.getTimeInMillis(), pendingIntent);
} else {
alarmManager.set(AlarmManager.RTC_WAKEUP, cal.getTimeInMillis(), pendingIntent);
}
the cod of MainActivity
public class MainActivity extends Activity {
#Override
protected void onCreate(Bundle savedInstanceState) {
// TODO Auto-generated method stub
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_preparation);
Bundle extras = this.getIntent().getExtras();
boolean startInstallUpdateApk = extras.getBoolean("startInstallUpdateApk");
}
}
Can I get the key,startInstallUpdateApk , onCreate after MainActivity called?
Simple answer to your question
Can I get the key,"startInstallUpdateApk" , onCreate after MainActivity called?
is "yes". However...
Your code is calling PendingIntent.getBroadcast() when it should be calling PendingIntent.getActivity(). When the alarm triggers nothing will happen now because an Activity Intent and a broadcast Intent are 2 completely different things.
I would create an alarm clock, i wrote this code but return this error:
2019-02-05 10:58:13.902 2663-10077/com.google.android.gms
E/ChromeSync: [Sync,SyncIntentOperation] Error handling the intent:
Intent { act=android.intent.action.PACKAGE_ADDED
dat=package:com.example.iacopo.alarmgroup flg=0x4000010
cmp=com.google.android.gms/.chimera.GmsIntentOperationService (has
extras) }.
How can i fix it? thanks
And this code doesn't create a icon af alarm in the notification panel, near the clock
public class MainActivity extends AppCompatActivity {
#Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
Calendar cal = Calendar.getInstance();
cal.setTimeInMillis(System.currentTimeMillis());
cal.clear();
cal.set(2018,1,5,10,0);
AlarmManager alarmMgr = (AlarmManager)getSystemService(Context.ALARM_SERVICE);
Intent intent = new Intent(MainActivity.this, AlarmReceiver.class);
this.startService(intent);
PendingIntent pendingIntent = PendingIntent.getBroadcast(MainActivity.this, 0, intent, 0);
alarmMgr.set(AlarmManager.RTC_WAKEUP, cal.getTimeInMillis(), pendingIntent);
}
}
and the receiver
public class AlarmReceiver extends BroadcastReceiver {
#Override
public void onReceive(Context context, Intent intent) {
Log.i("test","ok");
}
}
I want to send notification by BroadcastReceiver. Notification sent by AlarmReceiver but again sent notification when i clicked the notification. The same thing happens again, again and again like endless loop
Here is my AlarmReceiver.java
public class AlarmReceiver extends BroadcastReceiver {
#Override
public void onReceive(Context context, Intent intent) {
android.support.v7.app.NotificationCompat.Builder builder = new android.support.v7.app.NotificationCompat.Builder(context);
builder.setSmallIcon(R.mipmap.ic_launcher);
// This intent is fired when notification is clicked
Intent i = new Intent(context, MainActivity.class);
PendingIntent pendingIntent = PendingIntent.getActivity(context, 0, i, 0);
// Notifcation notify sound
Uri alarmSound = RingtoneManager.getDefaultUri(RingtoneManager.TYPE_NOTIFICATION);
// Set the intent that will fire when the user taps the notification.
builder.setContentIntent(pendingIntent);
// Large icon appears on the left of the notification
builder.setLargeIcon(BitmapFactory.decodeResource(context.getResources(), R.mipmap.ic_launcher));
// Content title, which appears in large type at the top of the notification
builder.setContentTitle("Have a good weekend");
//Notification click after clear notification
builder.setAutoCancel(true);
//Set notification sound
builder.setSound(alarmSound);
NotificationManager notificationManager = (NotificationManager) context.getSystemService(Context.NOTIFICATION_SERVICE);
// Will display the notification in the notification bar
notificationManager.notify(1, builder.build());
}
}
and MainActivity.java
public class MainActivity extends AppCompatActivity {
#Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
setAlarm();
}
private void setAlarm(){
AlarmManager manager = (AlarmManager)getSystemService(Context.ALARM_SERVICE);
Intent alarmIntent = new Intent(MainActivity.this, MyAlarmReceiver.class);
PendingIntent pendingIntent = PendingIntent.getBroadcast(MainActivity.this, 0, alarmIntent, 0);
Calendar calendar = Calendar.getInstance();
calendar.setTimeInMillis(System.currentTimeMillis());
calendar.set(Calendar.DAY_OF_WEEK,6);
calendar.set(Calendar.HOUR_OF_DAY,16);
calendar.set(Calendar.MINUTE,53);
calendar.set(Calendar.SECOND,0);
manager.setInexactRepeating(AlarmManager.RTC_WAKEUP,calendar.getTimeInMillis(),AlarmManager.INTERVAL_DAY,pendingIntent);
}
}
As on click on notification it open MainActivity and in onCreate method of this activity you are calling setAlarm() . So on click of notification onCreate method is invoked then setAlarm() is invoked , this again set Alarm and build notification.
Do following changes
call setAlarm() onClick of a button, so that it is not invoked automatically onCreate of activity.
If you want to send notification automatically
change the intent of notification
Intent i = new Intent(context, MainActivity.class);
As of now you are using intent to open ManinActivity on click of notification.
Change Intent to
Intent i = new Intent(context, OtherActivity.class);
OtherActivity is the activity which does not setAlarm() or build notification in onCreate method.
Alternative Method
Use sharedPreferences to check whether the notification is build once or not.
if build once then don't call setAlarm()
So I don't know why this code is not working. I wanted to make an "alarm" notification that would go off once a day. Just wanted to say I'm new to android. Changed up the code a bit couple of times but still wont work.
Alarm method executes notification does too but I get this : -248/? D/PowerManagerService﹕ releaseWakeLock flags=0x1 tag=AlarmManager W/ActivityManager﹕ Unable to start service Intent { flg=0x4 cmp=com.example.polakken.test/.lol (has extras) }: not found 06-13 00:00:00.825 231-267/? D/PowerManagerService﹕ acquireWakeLock flags=0x1 tag=AlarmManager 06-13 00:00:00.825 231-248/? D/PowerManagerService﹕ releaseWakeLock flags=0x1 tag=AlarmManager
My Code:
public class MainActivity extends ActionBarActivity {
#Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
SharedPreferences preferences = PreferenceManager.getDefaultSharedPreferences(this);
SharedPreferences.Editor editor = preferences.edit();
int i = preferences.getInt("numberoflaunches", 1);
if (i < 2) {
alarmMethod();
i++;
editor.putInt("numberoflaunches", i);
editor.commit();
}
if (savedInstanceState == null) {
splashMethod();
}
}
//...
private void alarmMethod() {
Intent intentbro = new Intent(this, lol.class);
AlarmManager alarmManager = (AlarmManager) getSystemService(ALARM_SERVICE);
PendingIntent pendingIntent = PendingIntent.getService(this, 0, intentbro, 0);
Calendar calendar = Calendar.getInstance();
calendar.set(Calendar.SECOND, 0);
calendar.set(Calendar.MINUTE, 0);
calendar.set(Calendar.HOUR, 0);
calendar.set(Calendar.AM_PM, Calendar.AM);
calendar.add(Calendar.DAY_OF_MONTH, 1);
alarmManager.setRepeating(AlarmManager.RTC_WAKEUP, calendar.getTimeInMillis(), 1000 * 60 * 60 * 24, pendingIntent);
Toast.makeText(MainActivity.this, "start alarm", Toast.LENGTH_LONG).show();
}
//notification class
public class lol extends Activity{
#Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
NotificationCompat.Builder b = new NotificationCompat.Builder(this);
Intent intent1 = new Intent(this.getApplicationContext(), MainActivity.class);
PendingIntent pIntent = PendingIntent.getActivity(this, 1, intent1, 0);
b.setContentText("lol");
b.setContentTitle("Default notification");
b.setSmallIcon(R.drawable.iconography_small_size);
b.setContentIntent(pIntent);
NotificationManager notificationManager = (NotificationManager) this.getSystemService(Context.NOTIFICATION_SERVICE);
notificationManager.notify(1, b.build());
}
}
You are creating the PendingIntent with PendingIntent.getService(), but you are supplying an Intent with an Activity.
So for your code to work you would need to use PendingIntent.getActivity().
(Additionally you have to add the corresponding <activity> tag to your AndroidManifest.xml.)
However, this is probably not exactly what you want: The only thing the lol Activity does is adding a notification. You might want to use a BroadcastReceiver (or perhaps a WakefulBroadcastReceiver) instead. In this case you would need to use PendingIntent.getBroadcast() instead of getActivity().
Follow these steps
1Create an Activity and add this code to setAlarm(can be any name)
Suppose you want to set Alarm for 24/02/15 ,14:00PM
#SuppressLint("UseSparseArrays")
public void setAlarms(Long id,String event_date,String event_time,Context context)
{
Calendar cal=Calendar.getInstance();
String[] parts=event_date.split("/");
String Event_date=parts[0];
String Event_month=parts[1];
String Event_Year=parts[2];
String[] parts1=event_time.split(":");
String Event_HOD=parts1[0];
String Event_MIN=parts1[1];
cal.add(Calendar.YEAR, Integer.parseInt(Event_Year)-cal.get(Calendar.YEAR));
cal.add(Calendar.MONTH, (Integer.parseInt(Event_month)-1)-cal.get(Calendar.MONTH));
cal.add(Calendar.DAY_OF_MONTH, Integer.parseInt(Event_date)-cal.get(Calendar.DAY_OF_MONTH));
cal.add(Calendar.HOUR_OF_DAY, Integer.parseInt(Event_HOD)-cal.get(Calendar.HOUR_OF_DAY));
cal.add(Calendar.MINUTE, Integer.parseInt(Event_MIN)-cal.get(Calendar.MINUTE));
cal.add(Calendar.SECOND, 0);
AlarmManager am =(AlarmManager)context.getSystemService(Activity.ALARM_SERVICE);
//Your BroadcastReceiver which will receive Alarm
Intent intent = new Intent(context, AlarmReceiver.class);
//you can use PutExtra() to send additional parameter with Intent
//PendingIntent to add
PendingIntent pendingIntent = PendingIntent.getBroadcast(context,
(int)(long)id, intent, PendingIntent.FLAG_UPDATE_CURRENT);
am.set(AlarmManager.RTC_WAKEUP, cal.getTimeInMillis(),
pendingIntent);
Toast.makeText(context, "alarm Set for Know", Toast.LENGTH_LONG).show();
}
2)Inside BroadcastReceiver onReceive() method
#Override
public void onReceive(Context context, Intent intent) {
//Receive parameter and do what you want to do with parameter
//Using RemoteViews you can Inflate a CustomLayout when user clicks on Notification when you do not want any CustomLayout for Notification remove it
RemoteViews contentView1 = new RemoteViews("com.example.new_reminder_book" , R.layout.custom_notification);
contentView1.setTextViewText(R.id.cn_tv_title, Event_title);
contentView1.setTextViewText(R.id.cn_tv_category, Event_category);
contentView1.setImageViewResource(R.id.cn_tv_image, R.drawable.event);
NotificationCompat.Builder mBuilder=new NotificationCompat.Builder(context)
.setSmallIcon(R.drawable.appicon)
.setContent(contentView1)
.setAutoCancel(true)
.setOngoing(true);
//Target Activity that will start when you click on Notification
Intent result=new Intent(context, EmptyActivity.class);
// The stack builder object will contain an artificial back stack for the
// started Activity.
// This ensures that navigating backward from the Activity leads out of
// your application to the Home screen.
TaskStackBuilder stackBuilder = TaskStackBuilder.create(context);
// Adds the back stack for the Intent (but not the Intent itself)
stackBuilder.addParentStack(EmptyActivity.class);
// Adds the Intent that starts the Activity to the top of the stack
stackBuilder.addNextIntent(result);
PendingIntent resultPendingIntent =
stackBuilder.getPendingIntent(
0,
PendingIntent.FLAG_UPDATE_CURRENT
);
mBuilder.setContentIntent(resultPendingIntent);
Notification notification=mBuilder.build();
notification.contentView=contentView1;
NotificationManager mNotificationManager =
(NotificationManager) context.getSystemService(Context.NOTIFICATION_SERVICE);
// mId allows you to update the notification later on.
mNotificationManager.notify((int) System.currentTimeMillis(), notification);
//A mp3 fine in res->raw that will play when notification fire
MediaPlayer mp = MediaPlayer.create(context, R.raw.listen);
mp.start();
PowerManager pm = (PowerManager) context.getSystemService(Context.POWER_SERVICE);
PowerManager.WakeLock wl = pm.newWakeLock(PowerManager.PARTIAL_WAKE_LOCK, "My Tag");
wl.acquire();
/*Vibrator vibrator = (Vibrator) context.getSystemService(Context.VIBRATOR_SERVICE);
//Set pattern for Vibration
long[] pattern={2000,3000,4000};
vibrator.vibrate(pattern,1);*/
wl.release();
}
}
3)Declare Two permissions in Manifest.xml
<uses-permission android:name="android.permission.WAKE_LOCK"/> <uses-permission android:name="android.permission.VIBRATE"/>
4)Declare You AlarmReceiver in Manifest.xml
<receiver android:name=".extra.AlarmReceiver" android:label="#string/title_activity_alarm_receiver" android:exported="true"> </receiver>
Follow these documents
http://developer.android.com/reference/android/content/BroadcastReceiver.html
http://developer.android.com/reference/android/app/AlarmManager.html
http://developer.android.com/guide/topics/ui/notifiers/notifications.html
http://developer.android.com/reference/android/os/PowerManager.WakeLock.html
Hope this will help you
The following code does not work. Also try this instead of getapplicationcontext. I need a hint:
public class AlarmReceiver extends BroadcastReceiver {
#Override
public void onReceive(Context context, Intent intent) {
NotificationCompat.Builder nb = new NotificationCompat.Builder();
nb.setContentTitle("title");
nb.setContentText("message");
nb.setSmallIcon(R.drawable.ic_launcher);
NotificationManager nm = (NotificationManager)getSystemService(Context.NOTIFICATION_SERVICE);
final Intent notificationIntent = new Intent(getApplicationContext(), MainActivity.class);
notificationIntent.setFlags(Intent.FLAG_ACTIVITY_CLEAR_TOP | Intent.FLAG_ACTIVITY_NEW_TASK);
final PendingIntent contentIntent = PendingIntent.getActivity(getApplicationContext(), 0, notificationIntent, 0);
nb.setContentIntent(contentIntent);
Notification notification = nb.getNotification();
nm.notify(0, notification);
}
}
And how could I remove the Notification after onclick?
UPDATE:
I'v solved a mistake. But there is still one mistake:
Replace getSystemService with context.getSystemService!
BroadcastReceivers do not have a Context, so you can't do that.
You should forward the intent you received to a Service or Activity and have that class can handle the notification.