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So I mentioned at the end of the last

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video that we were going to create

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another project, so I'm going to close

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this project by going up to the file

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menu and selecting close project and

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what we're going to do is create another

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project this time based on that other

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template the basic activity template.

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So I'm going to a click on start new

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Android studio project, so once again I'm

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going to accept all the default values

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for everything and uncheck the include

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Cochrane support box but if you're using

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Kotlin, this time keep it ticked so we're

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going to click on that checkbox now, so

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that you can see the difference so click

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on next then we're going to go to next

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again and then with this time we're

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going to choose the basic activity once

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we've done that we're going to click

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next. So once we get here we get to name

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the activity in layout but now this is a

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couple of extra options compared to the

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last video and we use the empty activity

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the title will be shown on the toolbar

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and this template adds to the project

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but note that the activity name and

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layout name are the same as for the

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empty activity template, so we're going

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to click on finish at this point and

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once again Android studio should create

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a basic project based on the template we

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selected. Now by the way while it's

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building the project it's not uncommon

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to see errors on the screen but they

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should clear when everything is finished

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just keep an eye down here in the bottom

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right hand corner and the status bar and

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don't try to do anything with a project

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until it's finished

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it'll say something like Gradle build

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finished in or words to that effect once

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it's finished and how long it took when

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it's done you can see don't hit the

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moment it says Gradle build running you

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can see down the bottom left hand corner

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of Gradle build finished and we're good

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to go now by the way you may also see a

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message at the top of the screen about

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Gradle files haven't changed this

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happens from time to time with some

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Android studio versions so if you do see

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that click the sync now button link at

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the right hand side as you can see on

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the screen there when Android studio is

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finished creating the project you should

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see main activity and a layout called

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content underscore main dot xml we can

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see them both on the screen up here now

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the layout looks very similar to our

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empty activity layout from the last

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video but there's also a floating action

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button down here so we can see at the

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bottom right. Now if you feeling chased

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hit because the image promised you a

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menu don't worry it's there but it

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doesn't appear on this layout

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now one difference between this template

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and the empty activity one is that

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Google splits the layouts for each

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activity up into two different files,

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content underscore main dot xml here is

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the one that would be using to put our

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own widgets into things like buttons and

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text boxes and anything else that we

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want displayed on the screen and the

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floating action button live in another

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file called activity underscore main dot

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xml, you notice over here we've got that

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file so we double click that to open it

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so you can see that the toolbar the

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floating action button can be selected

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when I click on them so I can click on

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something and notice that while I'm

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doing that it's selected but if I go

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back to content underscore main dot XML

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I can't click the floating action button

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and that's because they don't exist in

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this fall although Android studio does

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display the floating action button in

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the preview now as I click on the

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toolbar and the floating action button

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back in activity underscore main those

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heather's selected over the far left of

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the screen over here in the component

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tree and when I click on the main part

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of the screen here it selects the

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include line which is including the

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layout called content underscore main

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and you can see that over here to the

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right-hand side and this is called the

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attributes pane, so the idea is that the

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layered is split up to keep your widgets

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in a separate file from the toolbar and

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the floating action button, if you wanted

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to you could delete the include line and

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place all your widgets in here but it's

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less confusing to keep them separate now

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Google introduces separations back in

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Android studio 1.5 and that caused

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students at the time of some confusion

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well they suddenly found two layout

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files in their projects now it's

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possible that content underscore main

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may disappear from the template in a

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future version but now that you know

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that content underscore main is just

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included in activity in the school main

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and that you don't have to keep you

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widget separate if you don't want to you

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shouldn't have any problems if things do

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change and incidentally in this version

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of Android studio the toolbars blank

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even when previewing in it even when

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previewing activity underscore main

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and that does sometimes happen but if I

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run the app the toolbar would appear,

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so if you get a blank toolbar in preview

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mode don't worry about it it will show

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up when the app is running. Alright now

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before I finish talking about templates

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let's have a quick look at the main

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activity file there's quite a bit more

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code in this version

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than in the empty activity year template

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from the previous video but it's all to

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do with the setting up on the floating

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action button and the toolbar. Now there

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are two methods or functions if you're

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looking at this in the cotton course

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that weren't present before on create

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options menu in that on options item

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selected now they used to set up the

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menu and detect which menu items tapped

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also there's code in oncreate to cause

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the toolbar to be drawn and to allow

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clicks on the floating action button to

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be detected now if I don't want all that

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I can just delete it. Now in the oncreate

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method I'm going to go into there I'm

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going to actually delete all but the

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first two lines so everything from here

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down to the end of the right curly brace

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there I'm going to delete look so and

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I'm going to delete entirely on create

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options menu function and also the own

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options items selected so once I do that

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we basically end up with the same code

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as the previous template would have

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given us and by the way you can also

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delete activity underscore main I can

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come over here right-click and select

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delete I can go ahead and ignore those

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warnings click on delete anyway and

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that's removed activity and let's call

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main from this project and then what I

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could do is rename content underscore

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main to activity in this core main I

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come over here and right click that

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click on refactor and select rename I

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change that to activity now let's call

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my XML and click on refactor, now

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sometimes you might get an error doing

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that on a Mac or a Windows machine if

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that happens just right-click and choose copy,

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so if the rename didn't go through just

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right-click and select copy but the

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content owners called main.xml file and

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select copy and paste and then choose

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activity underscore - the file name and

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then you'll be able to delete content

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notice called main but in this case you

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can see they leave renamed worked ok, so

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now that I've done that notice over here

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there's this exclamation mark and if you

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click on that to show it we've got an

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arrow down here I can scroll it up to

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have a look at it it's just basically a

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warning about the

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that the surrounding layout did not

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actually include this layout, basically

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it's saying it's no longer shown inside

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another layout but we don't need to

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worry about that at this stage and what

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we can do instead is come over here to

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the text tab and by clicking on that we

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can see the xml for the layout. Now you

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don't need to worry about this xml very

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often well though it's very helpful if

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you select it and paste it all into your

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question if you have a problem with a

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layout not working what we can do to

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remove the error is delete the tools

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show in line, this line up here which is

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what Android studio is essentially is

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suggesting that we actually do so I'm

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gonna go ahead and do that delete it

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making sure that I'll leave the last

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greater than sign there and put that

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back in like so if we go back and click

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on the design tab now notice if the

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error is not valid anymore well we haven't

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got a red exclamation mark anymore so we

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created a project using the basic

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activity template but then we changed it

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to be exactly the same as the one

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created with the empty activity template

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now I don't expect you to remember all

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of that nor be able to do it yourself

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just yet but by the time you finish the

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course all of what we've done will make sense.

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So that's templates, they're just

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templates generating common code to save

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you having to type it but there's

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nothing magical about them you're

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completely free to make any change you

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want to once Android studio is created

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the project from the template.

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Now if Android studio changes in the

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future and temperance were these exact

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names are no longer available,

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you just want to choose ones that look

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similar and you can always delete any

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code that doesn't appear in the videos

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or add any code that I have in the video

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but which is missing from the template.

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Alright so let's move on to the next

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video where we're going to start coding

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up our first app. See you in the next video.