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Welcome back.

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We've allowed our users to change a couple of things for the TaskTimer app,

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that was in an earlier section.

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So I'll quickly review what it is they can configure.

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I've got the app running in the emulator, and I'll go to the settings menu.

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We can change which day starts the week

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and we can also choose to ignore timings

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that are less than a certain number of seconds or minutes

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if that's what the user wants to do.

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We'll start by implementing that first day of the week setting,

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that will make some of our Australian users happy

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because they like to start their weeks on a Monday

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and currently it starts on a Sunday.

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At the moment, the app starts the week on a day determined by the user's locale.

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That's how the Gregorian calendar class works.

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That's a sensible default to use if they haven't changed any of the settings.

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I've left my emulator set to English Australia,

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and the settings dialog is currently showing Sunday

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as the day that the week starts on.

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I'll cancel the dialogue and switch the phone's settings

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to change locale to English United Kingdom.

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If I go into settings again,

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this time the default first day is Monday.

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We allow the user to change that. But at the moment,

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we're not using their choice in our code.

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We'll implement that now.

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We do that in our DurationsViewModel.

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I'll start by creating a couple of variables for the shared preferences

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that we're going to get the settings from

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and the first day of the week variable to store the value.

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Settings is a reference to the shared preferences

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that our settings dialog uses.

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We then retrieve the settings FirstDayOfweek preference

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and return the calendars FirstDayOfWeek value

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if a preference hasn't been saved yet. In the init block,

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we'll use that value to tell the calendar which day

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it should start the week on.

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I've logged the value to make it easier to check that everything's working.

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We also need to set the FirstDayOfTheWeek in our BroadcastReceiver

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because we create a new calendar instance there.

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Okay. That's all we need to change for our app to use the FirstDayOfTheWeek

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that our user wants.

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Let's see if it works.

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Run the app, and go into the reports.

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I've still got my emulators locale set to the United Kingdom.

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So the calendar should show Monday as the first day of the week.

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Tap the calendar icon to check, set the date to the 14th of June

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2019.

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That's a Friday. And when I tap okay,

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our report is showing data for the 10th

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to the 16th of June.

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We're going to improve this next bit shortly. At the moment,

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I have to return to the main screen to access the settings.

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I'll choose Tuesday from the dropdown and tap okay.

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Back in the reports,

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I'll set the date to the 14th of June again.

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This time the week starts on Tuesday the 11th,

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and we get data from the 11th to the 17th of June.

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I glossed over something there. I'll tap on the calendar icon again.

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You'll notice that the week still starts on Monday.

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Our report is correct. It shows data for a week starting on Tuesday,

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but the android DatePickerDialog doesn't reflect that.

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Let's see what we can do about that in the next video. I'll meet you there.