Implemented cancel to reminders of habits.

uhabits-android/src/main/java/org/isoron/uhabits/intents/PendingIntentFactory.kt

@@ -54,6 +54,15 @@ class PendingIntentFactory
                     },
                     FLAG_UPDATE_CURRENT)
 
+    fun cancelNotification(habit: Habit): PendingIntent =
+            PendingIntent.getBroadcast(
+                    context, 3,
+                    Intent(context, WidgetReceiver::class.java).apply {
+                        action = WidgetReceiver.ACTION_CANCEL_REPETITION
+                        data = Uri.parse(habit.uriString)
+                    },
+                    FLAG_UPDATE_CURRENT)
+
     fun showHabit(habit: Habit): PendingIntent =
             android.support.v4.app.TaskStackBuilder
                     .create(context)

uhabits-android/src/main/java/org/isoron/uhabits/notifications/AndroidNotificationTray.kt

@@ -61,6 +61,12 @@ class AndroidNotificationTray
                 context.getString(R.string.snooze),
                 pendingIntents.snoozeNotification(habit))
 
+        val cancelAction = Action(
+                R.drawable.ic_action_cancel,
+                context.getString(android.R.string.no),
+                pendingIntents.cancelNotification(habit)
+        )
+
         val wearableBg = decodeResource(context.resources, R.drawable.stripe)
 
         // Even though the set of actions is the same on the phone and
@@ -70,6 +76,7 @@ class AndroidNotificationTray
                 .setBackground(wearableBg)
                 .addAction(checkAction)
                 .addAction(snoozeAction)
+                .addAction(cancelAction)
 
         val notification = NotificationCompat.Builder(context)
                 .setSmallIcon(R.drawable.ic_notification)
@@ -79,6 +86,7 @@ class AndroidNotificationTray
                 .setDeleteIntent(pendingIntents.dismissNotification(habit))
                 .addAction(checkAction)
                 .addAction(snoozeAction)
+                .addAction(cancelAction)
                 .setSound(ringtoneManager.getURI())
                 .extend(wearableExtender)
                 .setWhen(reminderTime)

uhabits-android/src/main/java/org/isoron/uhabits/receivers/WidgetReceiver.java

@@ -46,6 +46,9 @@ public class WidgetReceiver extends BroadcastReceiver
     public static final String ACTION_REMOVE_REPETITION =
         "org.isoron.uhabits.ACTION_REMOVE_REPETITION";
 
+    public static final String ACTION_CANCEL_REPETITION =
+            "org.isoron.uhabits.ACTION_CANCEL_REPETITION";
+
     public static final String ACTION_TOGGLE_REPETITION =
         "org.isoron.uhabits.ACTION_TOGGLE_REPETITION";
 
@@ -88,6 +91,11 @@ public class WidgetReceiver extends BroadcastReceiver
                     controller.onRemoveRepetition(data.getHabit(),
                         data.getTimestamp());
                     break;
+
+                case ACTION_CANCEL_REPETITION:
+                    controller.onCancelRepetition(data.getHabit(),
+                            data.getTimestamp());
+                    break;
             }
         }
         catch (RuntimeException e)

uhabits-core/src/main/java/org/isoron/uhabits/core/ui/widgets/WidgetBehavior.java

@@ -61,6 +61,12 @@ public class WidgetBehavior
         performToggle(habit, timestamp);
     }
 
+    public void onCancelRepetition(@NonNull Habit habit, Timestamp timestamp)
+    {
+        onRemoveRepetition(habit, timestamp);
+        notificationTray.cancel(habit);
+    }
+
     public void onToggleRepetition(@NonNull Habit habit, Timestamp timestamp)
     {
         performToggle(habit, timestamp);