Learn By Example
On your notification builder use .setOngoing(True) and this will prevent the user from removing your notification. and
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n.flags |= Notification.FLAG_NO_CLEAR; |
References https://stackoverflow.com/questions/22555943/android-how-to-create-a-permanent-notification
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Collections.sort(myList, new Comparator<EmployeeClass>(){ public int compare(EmployeeClass obj1, EmployeeClass obj2) { // ## Ascending order return obj1.firstName.compareToIgnoreCase(obj2.firstName); // To compare string values // return Integer.valueOf(obj1.empId).compareTo(obj2.empId); // To compare integer values // ## Descending order // return obj2.firstName.compareToIgnoreCase(obj1.firstName); // To compare string values // return Integer.valueOf(obj2.empId).compareTo(obj1.empId); // To compare integer values } }); |
References https://stackoverflow.com/questions/9109890/android-java-how-to-sort-a-list-of-objects-by-a-certain-value-within-the-object
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private boolean isMyServiceRunning(Class<?> serviceClass) { ActivityManager manager = (ActivityManager) getSystemService(Context.ACTIVITY_SERVICE); for (RunningServiceInfo service : manager.getRunningServices(Integer.MAX_VALUE)) { if (serviceClass.getName().equals(service.service.getClassName())) { return true; } } return false; } |
References https://stackoverflow.com/questions/17588910/check-if-service-is-running-on-android
Continue reading »Snackbar is now part of the new Android Support Design library. you can use LENGTH_INDEFINITE as duration if you want to show it indefinitely. . […]
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int colorFrom = getResources().getColor(R.color.red); int colorTo = getResources().getColor(R.color.blue); ValueAnimator colorAnimation = ValueAnimator.ofObject(new ArgbEvaluator(), colorFrom, colorTo); colorAnimation.setDuration(250); // milliseconds colorAnimation.addUpdateListener(new AnimatorUpdateListener() { @Override public void onAnimationUpdate(ValueAnimator animator) { textView.setBackgroundColor((int) animator.getAnimatedValue()); } }); colorAnimation.start(); |
References https://stackoverflow.com/questions/2614545/animate-change-of-view-background-color-on-android
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// register intent time tick receiver which ticks every minute registerReceiver(timeTickReceiver, new IntentFilter(Intent.ACTION_TIME_TICK)); |
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/** * restart service every minute if it's killed */ private BroadcastReceiver timeTickReceiver = new BroadcastReceiver() { @Override public void onReceive(Context context, Intent intent) { try { boolean isServiceRunning = false; if (intent.getAction().equals(Intent.ACTION_TIME_TICK)) { ActivityManager manager = (ActivityManager) getApplicationContext().getSystemService(Context.ACTIVITY_SERVICE); if (manager != null) { for (ActivityManager.RunningServiceInfo service : manager.getRunningServices(Integer.MAX_VALUE)) { if ("net.pupli.monitoring.MyMqttService".equals(service.service.getClassName())) { isServiceRunning = true; } } } if (!isServiceRunning) { Intent i = new Intent(context, MyMqttService.class); context.startService(i); } } } catch (Exception ex) { ex.printStackTrace(); } } }; |
References https://llin233.github.io/2015/11/16/How-to-prevent-service/ https://developer.android.com/reference/android/content/Intent#action_time_tick https://medium.com/google-developers/who-lives-and-who-dies-process-priorities-on-android-cb151f39044f http://sourabhsoni.com/how-to-use-intent-action_time_tick/
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public boolean isOutlier(List<RawItem> rawItems, String value) { DescriptiveStatistics descriptiveStatistics = new DescriptiveStatistics(); double dValue = Double.parseDouble(value); for (RawItem rawItem : rawItems) { double d = Double.parseDouble(rawItem.getValue()); descriptiveStatistics.addValue(d); } double Q1 = descriptiveStatistics.getPercentile(25); double Q3 = descriptiveStatistics.getPercentile(75); double IQR = Q3 - Q1; double highRange = Q3 + 3 * IQR; double lowRange = Q1 - 3 * IQR; if (dValue > highRange || dValue < lowRange) { return true; } return true; } |
References https://www.shmoop.com/basic-statistics-probability/box-whisker-plots.html http://www.baeldung.com/apache-commons-math https://stackoverflow.com/questions/22888902/get-median-from-number-series-using-apache-commons-math
Continue reading »Setup
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EventBus eventBus = new EventBus(); |
Creating Listeners
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public class EventListener { private static int eventsHandled; @Subscribe public void stringEvent(String event) { eventsHandled++; } } |
Registering Listeners
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EventListener listener = new EventListener(); eventBus.register(listener); |
Unregistering Listeners
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eventBus.unregister(listener); |
Posting Events
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@Test public void givenStringEvent_whenEventHandled_thenSuccess() { eventBus.post("String Event"); assertEquals(1, listener.getEventsHandled()); } |
Posting Custom Events
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public class CustomEvent { private String action; // standard getters/setters and constructors } |
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@Subscribe public void someCustomEvent(CustomEvent customEvent) { eventsHandled++; } |
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@Test public void givenCustomEvent_whenEventHandled_thenSuccess() { CustomEvent customEvent = new CustomEvent("Custom Event"); eventBus.post(customEvent); assertEquals(1, listener.getEventsHandled()); } |
Handling an Unsubscribed Event
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@Subscribe public void handleDeadEvent(DeadEvent deadEvent) { eventsHandled++; } |
[…]
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public void createNotification(View view) { // Prepare intent which is triggered if the // notification is selected Intent intent = new Intent(this, NotificationReceiverActivity.class); PendingIntent pIntent = PendingIntent.getActivity(this, (int) System.currentTimeMillis(), intent, 0); // Build notification // Actions are just fake Notification noti = new Notification.Builder(this) .setContentTitle("New mail from " + "test@gmail.com") .setContentText("Subject").setSmallIcon(R.drawable.icon) .setContentIntent(pIntent) .addAction(R.drawable.icon, "Call", pIntent) .addAction(R.drawable.icon, "More", pIntent) .addAction(R.drawable.icon, "And more", pIntent).build(); NotificationManager notificationManager = (NotificationManager) getSystemService(NOTIFICATION_SERVICE); // hide the notification after its selected noti.flags |= Notification.FLAG_AUTO_CANCEL; notificationManager.notify(0, noti); } |
or start foreground service
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startForeground(101,notification); |
References http://www.vogella.com/tutorials/AndroidNotifications/article.html https://questdot.com/android-foreground-service/
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textView.setTypeface(null, Typeface.BOLD_ITALIC); textView.setTypeface(null, Typeface.BOLD); textView.setTypeface(null, Typeface.ITALIC); textView.setTypeface(null, Typeface.NORMAL); |
To keep the previous typeface
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textView.setTypeface(textView.getTypeface(), Typeface.BOLD_ITALIC) |
References https://stackoverflow.com/questions/6200533/set-textview-style-bold-or-italic
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