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(light music)

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(computer keys clicking)

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Before we continue with the TaskTimer App,

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let's review what happens when various parts

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of Android Studio as well as the Android SDK get updated.

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So I've started up Android Studio

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and you can see that we have got

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some updates waiting for us.

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But I also wanna show you the process

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of updating the Android SDK.

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So we're going to Configure, and we'll select SDK Manager.

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And when I do that you can see at the moment now

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we've got a new version, Android 9.0 Pie.

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So that's our new release.

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And new release comes through once or twice a year.

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We had Android 8 last year and then an 8.1 update.

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So what we're gonna do is update to Android 9.

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So I'm gonna click on that button, the Android 9.

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And we're gonna click on Show Package Details.

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It tells us what parts of the Android 9 update we can take.

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I'm gonna click on Android SDK Platform 28 and Sources.

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And the other thing you should do

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is to select a system image that you'll actually be using.

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So or you can choose either say the Google API System image,

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or Google Play one, we've talked about the differences

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between those two.

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I'm also gonna grab the Intel x86.

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But you can grab whichever ones you need.

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So that's number one.

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Secondly, in SDK Tools, same thing,

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Show Package Details.

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We've quite older versions that were previously installed.

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I'm gonna grab the latest version as well,

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which in this case is 28.0.3.

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And we're gonna click on OK now that I've done that.

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It gives us an update on what it's about to do.

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I'm gonna click on OK.

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All right, so that's now gonna download

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and instal those things.

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So I will just fast forward this video

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so you don't have to wait too long

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while it downloads and instals everything,

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and we'll come back once that's complete.

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All right, so you can see that we've now completed that

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so I'm gonna click on Finish.

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And that part has been updated.

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We can go back into Configure, SDK Manager again.

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We can see that Android 9 is now showing as being updated.

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We've still got the older version.

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I'm gonna leave that there for now,

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and SDK Tools.

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We're doing a later version.

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So that's a good thing to have a recap

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on every now and again.

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But the next thing we'll do now is go into Task Timer

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now that we've updated.

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So things get updated on a regular basis,

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and I know we've covered some of this stuff before,

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but recapping it, I think, is a good idea

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because it's something that you'll need

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to do fairly often as Google update

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to support libraries and the Gradle build system.

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And there's also updates to the Kotlin language

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and the Kotlin plugin that Android Studio uses.

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So again, just a good recap

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of the various steps that are needed.

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So you can see that what's happened at the moment

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is that we've been told to take advantage

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of the latest version of Gradle and upgrade to 4.6.

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That number might be different

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depending on when you're watching this video.

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For now I'm gonna click on Remind me tomorrow

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just to show you an alternate way.

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I wanna actually show you what it's actually gonna change.

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Normally you would actually click Update there.

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So I'm gonna click on Remind me tomorrow.

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And we should find a Gradle file to build.

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And you can see, in fact,

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we've got an error at the top here,

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Kotlin not configured.

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So it did actually complete a build,

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but obviously with Kotlin not configured

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we've got various errors showing through here,

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which we need to fix.

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All right, so how would we do this manually?

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Well first we got that message about Gradle.

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We can actually come over here to Gradle Scripts.

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And there's this gradle-wrapper.properties.

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Double click that to open it.

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Sometimes that gets updated automatically.

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If you do get that earlier dialogue you can choose update,

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but here what I'm gonna do is manually change it.

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I'm gonna update it to 4.6 just

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to show you an alternate way of doing it.

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I'm gonna sync now.

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And that's going to actually

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download the new version of Gradle, that new version.

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You can see down at the bottom

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it's busily downloading things.

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For the first time when you select a new version of Gradle

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it goes through that process.

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And just another reminder here is that you can

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create a new project and check out

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all the equivalent files in there,

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comparing it to what you've currently opened.

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And this is basically a good process to go through

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if you've got an app that you haven't updated

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for a long time, you haven't opened in Android Studio

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for a long time when you want to update it

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to the latest version of the various support libraries

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and the Android SDK itself.

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So we'll just fast forward through this

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and wait for it to finish.

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All right so you can see that's now finished,

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and we've now got a successful build there,

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but if you go back to our source code

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we can also see now that's looking a bit healthier.

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We haven't got any errors anymore.

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So so far so good.

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The next thing to look at is to go back now

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into our regular projects build Gradle file.

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So build.gradle for our project.

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Open that up and have a look.

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And you can see at the moment we're using 1.2.51,

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the version of Kotlin.

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But also notice here the gradle plugin wants to be updated.

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Now that we've actually run the, or updated to 4.6,

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it's telling us there's an upgrade available.

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So I'm actually gonna change it

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to what it's asking for there, which is 3.2.1.

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And I can do that by just editing that file,

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3.2.1.

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But the other thing is the version of Kotlin is updated,

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and there's no indication here that it has.

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One way of finding that out is going into the Tools menu,

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selecting Kotlin, and Configure Kotlin Plugin Updates.

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And that will normally tell you

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whether there's a new version.

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You can see 1.2.71 is the current Kotlin version,

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which gives us a hint that we're a bit behind

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even though that's the plugin,

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but also a new release 1.3.1 is available.

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So what we should be able to do is come back down here

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and select 1.3.10

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and update it that way.

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So let's go ahead and do that.

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Then we'll need to go back after this

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and update the Kotlin plugin.

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Because remember, there's two parts to this now.

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There's the Kotlin plugin,

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but there's also the Kotlin compiler.

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So we're actually updating both,

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which are usually separate steps.

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I know we haven't talked about it a lot,

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but Gradle is the build tool that comes with Android Studio,

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and it's not just for Android Studio projects.

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It works very well for lots of different languages,

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and is just a great build tool.

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And obviously it's pretty good because that's why

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Google have decided to include it or bundle it

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with Android Studio.

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All right, so a couple of things have come up here now.

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Standard library, it's telling us that it's going

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to update it and the language version

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is updating it to 1.3 as well.

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I'm gonna click on Migrate,

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Whole project.

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And remember, we've got that other note there

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in the event log about updating the Kotlin plugin,

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which we'll do that shortly.

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Usually good when you're updating

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not to try and update too many things at once.

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It's just trying to let one thing finish

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before proceeding to the next step.

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All right, so next, then we've done that.

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We'll go back into Tools menu, Kotlin,

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Configure Kotlin Plugin Updates.

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This time what we'll do is we'll instal now

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the new version of Kotlin, the Kotlin plugin, rather.

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And plugin will be activated after reset.

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So I'm gonna click on OK there.

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I'm gonna allow Android Studio to restart.

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We still got some things that need updating,

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but we'll talk about those a little bit later.

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We'll close it for now.

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What we have got, though, is a clean build.

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And there's nothing in there indicating

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that anything needs to be updated anymore,

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so that's good.

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Now that we've done that that's the projects build Gradle.

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The next one we wanna do is have a look at our module

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in our build Gradle, which is basically

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the build Gradle script for our app, for Task Timer.

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So let's have a look at that.

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Now that needs some updating.

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Firstly we've updated to a new version of the Android SDK,

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so let's change 27 to 28.

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Let's also change the target SDK to 28 as well.

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Now there's no longer any need

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to specify build tools version.

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So if you've got an entry for build tools version

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you can comment that out or delete it.

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But you can see in my case I haven't actually got that.

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All right, so I've made those changes.

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We are not gonna sync yet because you can see by doing that

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we've got some other issues here,

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and basically it's now saying that

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because you've updated the Android SDK you shouldn't

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be using an older version of the support libraries.

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So basically the support library shouldn't be different

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to the compiler SDK version,

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which of course we've changed up here to SDK 28.

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So I'm gonna change that to 28.

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When in doubt as to what version

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just go with 0.0 which should always be there.

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And if there is a version that's been updated after that,

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then you'll actually get a message here

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that there's a later version,

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and you can hover over it as you saw me do previously

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to get whatever the version is.

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In fact, I'll show you that shortly.

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I'll change those three, but this constraint-layout

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is wanting to be updated, we get a measure similar to that

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and it's saying here that 1.1.3 is available.

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So I'm gonna change that to 1.3

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and we're going to sync now.

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And that should update our application now

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to take advantage of all the latest versions

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of the various support libraries

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as well as the constraint-layout version for API 28.

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The other thing you may get is a message.

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You may get a tool tip saying you can configure Gradle

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wrapper to use distribution with sources.

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That's usually a good thing to do.

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If there's a bug it can pop up sometimes.

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You can click on hide the tip if it comes up more than once,

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depending on your version of Android Studio,

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you might find that that will come up a few times.

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All right, I can see now at this point

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we've actually fixed all those errors

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and we've now configured ourselves to use Android SDK 28,

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and we've updated everything to the latest versions

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of the various support libraries.

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Now if we just quickly go in as a final check

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to go into main activity,

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just to make sure it's not showing an error there

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and I'll just close this down so we've got a bit more space.

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Now this may or may not be showing an error.

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If you see an input there for android.app.fragment

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then you'll wanna delete that,

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and that's because it'll be,

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if you've got an error it'll be importing fragment

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from the framework android.app.framework

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as well as from the support library,

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android.support.v4.app.fragment.

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And you can see on line five that's the second one,

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the one I've got in my project.

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So if you happen to get an error delete the other one,

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the android.app.fragment.

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All right, so there's no more errors

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and we can continue on with Task Timer in the next video.

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But before I finish you may have heard that Google

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are moving their support libraries and a load of other stuff

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into Android X.

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Android Studio 3.2 and above

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will convert your project for you.

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There's an option to migrate

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to Android X on the Refactor menu.

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You can see that option there.

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But we're not gonna do that yet,

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and the reason that we're not doing it

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is because the Android X libraries

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are still in alpha/beta.

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And that means that they haven't got as far yet

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as releasing your production version,

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and as such there'll still be bugs present.

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And we suggest not using alpha and beta versions

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of any library because generally speaking

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you won't know if any problems that are coming up

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are in your code or in the libraries.

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All right, so this has been a long video

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so I'll end it here.

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In the next one we'll move back to updating,

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or move back to working more on the Task Timer application.

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See you in the next video.