1 00:00:04,400 --> 00:00:09,060 Good day. Welcome back. We've allowed the user to change the day that a week starts 2 00:00:09,560 --> 00:00:13,160 on and modified the DatePickerFragment class to use that day. 3 00:00:13,960 --> 00:00:17,760 To test it, we need to make a change to our durations report. 4 00:00:22,160 --> 00:00:25,460 Now the DurationsReport class doesn't have a calendar. 5 00:00:26,060 --> 00:00:31,050 Rather than add one, I'm going to expose the FirstDayOfWeek 6 00:00:31,250 --> 00:00:33,550 property from the DurationsViewModel class. 7 00:00:34,350 --> 00:00:36,350 We want it to be read-only 8 00:00:36,350 --> 00:00:39,050 just like we've done for the DisplayWeek property. 9 00:00:55,600 --> 00:01:00,000 FirstDayOfWeek is now available to the durations report activity 10 00:01:00,000 --> 00:01:01,600 but it can't be changed by it. 11 00:01:02,500 --> 00:01:07,000 That gives us an error in BroadcastReceiver's onReceive function. 12 00:01:07,600 --> 00:01:10,700 We have to modify the _FirstDayOfWeek. 13 00:01:23,900 --> 00:01:25,600 In durations report, 14 00:01:25,600 --> 00:01:28,600 we can pass that value to the dialogues arguments 15 00:01:28,600 --> 00:01:31,100 in the ShowDatePickerDialog function. 16 00:01:45,900 --> 00:01:48,100 All right. Does it work? 17 00:01:49,100 --> 00:01:51,600 I'll run the app again and check the settings. 18 00:02:01,100 --> 00:02:03,460 The week's set to start on a Tuesday, 19 00:02:03,760 --> 00:02:06,360 so let's see how the date picker looks now. 20 00:02:14,660 --> 00:02:17,160 In reports, we've got data for the current week 21 00:02:17,660 --> 00:02:21,160 when I tap the calendar the week starts on a Tuesday 22 00:02:21,520 --> 00:02:23,320 and the dates showing in the report 23 00:02:23,320 --> 00:02:26,320 correctly reflect a week that starts on Tuesday. 24 00:02:27,320 --> 00:02:30,920 I'm not aware of any country that does start their week on a Tuesday, 25 00:02:31,220 --> 00:02:35,620 but our Australian users can now choose Monday or Sunday as their start 26 00:02:35,980 --> 00:02:38,180 day and have the calendar look as they expect. 27 00:02:39,380 --> 00:02:43,380 There's more testing you should do to make sure everything's working correctly. 28 00:02:43,880 --> 00:02:46,980 One obvious test is to make sure we haven't broken anything 29 00:02:46,980 --> 00:02:50,180 if the user hasn't set a starting day in the settings. 30 00:02:51,480 --> 00:02:55,140 That would involve uninstalling the app to clear the shared preferences. 31 00:02:55,940 --> 00:02:58,940 A quick way to test without uninstalling 32 00:02:59,340 --> 00:03:01,940 is to use the device file explorer 33 00:03:01,940 --> 00:03:04,290 to delete the shared preferences file. 34 00:03:05,540 --> 00:03:07,540 Doing that doesn't replace a proper test 35 00:03:07,940 --> 00:03:10,540 but it's a useful technique when you're still developing. 36 00:03:11,840 --> 00:03:13,240 If you do that 37 00:03:13,240 --> 00:03:18,140 be aware that android apps don't expect their preferences files to be deleted. 38 00:03:18,940 --> 00:03:21,200 You may have to run the app several times 39 00:03:21,200 --> 00:03:25,300 before it notices that there is no longer a shared preference file. 40 00:03:26,900 --> 00:03:30,500 We've added some code that only runs on API 21 and above. 41 00:03:31,300 --> 00:03:35,900 When you use a feature like that one that's not available on earlier versions, 42 00:03:36,400 --> 00:03:39,600 make sure you test the app on an earlier version. 43 00:03:40,500 --> 00:03:44,500 In this case that would be API 19 or earlier. 44 00:03:45,400 --> 00:03:49,200 API 20 was a version of API 19 45 00:03:49,200 --> 00:03:51,200 released for wearable devices, 46 00:03:51,700 --> 00:03:56,000 so you won't find an API 20 system image for the emulator. 47 00:03:56,800 --> 00:03:59,300 Okay. I'll stop this video here. In the next video, 48 00:03:59,900 --> 00:04:04,200 we'll add the settings option to our reports menu 49 00:04:04,700 --> 00:04:08,200 and see how we can observe changes to the shared preferences. 50 00:04:08,200 --> 00:04:09,100 See you there.