fixed issue where weekly picker dialog isn't being restored on rotation

squash! fixed issue where weekly picker dialog isn't being restored on rotation

android/uhabits-android/src/main/java/org/isoron/uhabits/activities/common/dialogs/WeekdayPickerDialog.java

@@ -22,6 +22,8 @@ package org.isoron.uhabits.activities.common.dialogs;
 import android.app.*;
 import android.content.*;
 import android.os.*;
+import android.support.annotation.NonNull;
+import android.support.annotation.Nullable;
 import android.support.v7.app.AlertDialog;
 import android.support.v7.app.*;
 
@@ -38,6 +40,7 @@ public class WeekdayPickerDialog extends AppCompatDialogFragment implements
                                                                  DialogInterface.OnMultiChoiceClickListener,
                                                                  DialogInterface.OnClickListener
 {
+    private static final String KEY_SELECTED_DAYS = "selectedDays";
     private boolean[] selectedDays;
 
     private OnWeekdaysPickedListener listener;
@@ -48,6 +51,21 @@ public class WeekdayPickerDialog extends AppCompatDialogFragment implements
         selectedDays[which] = isChecked;
     }
 
+    @Override
+    public void onCreate(@Nullable Bundle savedInstanceState) {
+        super.onCreate(savedInstanceState);
+
+        if(savedInstanceState != null){
+            selectedDays = savedInstanceState.getBooleanArray(KEY_SELECTED_DAYS);
+        }
+    }
+
+    @Override
+    public void onSaveInstanceState(@NonNull Bundle outState) {
+        super.onSaveInstanceState(outState);
+        outState.putBooleanArray(KEY_SELECTED_DAYS, selectedDays);
+    }
+
     @Override
     public void onClick(DialogInterface dialog, int which)
     {

android/uhabits-android/src/main/java/org/isoron/uhabits/activities/habits/edit/EditHabitDialog.java

@@ -23,8 +23,10 @@ import android.app.Dialog;
 import android.content.*;
 import android.os.*;
 import android.support.annotation.*;
+import android.support.v4.app.Fragment;
 import android.support.v7.app.*;
 import android.text.format.*;
+import android.util.Log;
 import android.view.*;
 
 import com.android.datetimepicker.time.*;
@@ -47,6 +49,8 @@ public class EditHabitDialog extends AppCompatDialogFragment
     public static final String BUNDLE_HABIT_ID = "habitId";
 
     public static final String BUNDLE_HABIT_TYPE = "habitType";
+    public static final String EDIT_HABIT_TAG = "editHabit";
+    private static final String WEEKDAY_PICKER_TAG = "weekdayPicker";
 
     protected Habit originalHabit;
 
@@ -109,6 +113,8 @@ public class EditHabitDialog extends AppCompatDialogFragment
         setupReminderController();
         setupNameController();
 
+        restoreChildFragmentListeners();
+
         return view;
     }
 
@@ -268,8 +274,21 @@ public class EditHabitDialog extends AppCompatDialogFragment
                 WeekdayPickerDialog dialog = new WeekdayPickerDialog();
                 dialog.setListener(reminderPanel);
                 dialog.setSelectedDays(currentDays);
-                dialog.show(getFragmentManager(), "weekdayPicker");
+                dialog.show(getChildFragmentManager(), WEEKDAY_PICKER_TAG);
             }
         });
     }
+
+    /**
+     * Used to restore any child fragment listeners on rotation/config change.
+     *
+     * Can possibly be refactored to use ViewModel/
+     */
+    private void restoreChildFragmentListeners() {
+        final WeekdayPickerDialog weekdayPickerDialog =
+                (WeekdayPickerDialog) getChildFragmentManager().findFragmentByTag(WEEKDAY_PICKER_TAG);
+        if(weekdayPickerDialog != null) {
+            weekdayPickerDialog.setListener(reminderPanel);
+        }
+    }
 }