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Hello this is Martez accorded.



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And in this story or let's actually continue building our floating new application.



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So inside our main activity class let's declare a button.



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So first let me tell you that you should always declare your instance variables as private.



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So first we put the private keyboard and then your way to create a variable of type.



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But in the name of our variable is going to be PTEN floating semicolon.



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So here we just declared around the table.



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Now it's time to initialize around the table inside our uncreate me if it's a little bit here and floating.



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Assignment operator let's cast it to a button object find view by ID or that ID that PTEN floating semicolon.



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So now I'm going to actually create a listener an uncle listener for this button so that whenever a



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user interacts with this button you're going to be notified.



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So let's say between BT or floating that set unclick listener near you.



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So now in order to use the autocomplete feature of Android stood you just hold down the shift key on



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my keyboard and press landlady Revici on your keyboard.



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So now it's going I should show you this option if you click unclick listener two curly braces and inside



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the reproducers you can see these three dots.



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Choose this one and then press on until you on your keyboard.



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So now the Android suit is going to put all of these codes for you it can actually create an anonymous



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in a class for you.



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And inside is in an anonymous senior class we have this unclick the uncle's method.



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So is this method you're going to say we have a method called Start service because we need a service.



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And so the practice is to say new.



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So first I can tell you that it's going to be the prime method of this start service Smurfette.



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So again I'm going to choose the autocomplete feature of Android studio so you can see that this Myford



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start service needs an argument of type intent here.



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So here we just see new because you want to create a new uptick a new object of intent intent with capital



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i.e. inside the practices we're going to pass two arguments the first one is going to be the context.



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The context is the main activity.



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So if we say main activity that this come up.



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And the second argument is going to be the class that is going to actually be the service.



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So the second class is going to play the role of a service.



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So if you're going to actually name it as a float service floating you say let's name it.



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Floating view because it's more meaningful fluting View service.



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So now let's put a semicolon at the end of our method here.



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Now it's actually showing us an error.



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If I actually hover over this floating view service here it says cannot resolve symbol Flaten view service



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and that's because we haven't still created this class.



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We need to create a new class.



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Right.



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So for it make sure that you put that class here because it's a class.



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So when you put that class here is going to actually put this package context for you to keyboard.



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So it's a new feature in androids to do in order to specify the role of each argument.



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Don't worry about this one.



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It's a new feature.



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It's just the new feature is it's not going to actually affect how Android studio works.



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So now it's just a floating View service.



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I'm going to solve this problem.



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A new solution is to actually as you can see I'm highlighting this line of code here right.



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And if I actually click on this fluty view service is going to show us a little red ball up here at



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the left hand side right now if I click on this one it says create class floating view service.



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So by just clicking on this option it's going to create the class for us automatically we don't have



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to.



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For example click on find new class.



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I just need to open the I you first so in order to create a class you need to open the Android view.



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And then here open the package of in the Java folder and then click on the package and then right click



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on this package.



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New.



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For example Java class right you would have to do that.



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I just need to just click on this or this floating view service that last year and then it's going to



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show us this little red ball.



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I just need to click on it and it's going to show us this often create class floating users.



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Just click on it and then it's going to actually open this little window here.



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So it's his destination package.



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So this is going to be the destination package.



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So this is the same package that we have the main activity.



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And then we have the target this destination that directory.



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Don't change these settings here.



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Leave them as default and just click on.



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And now a new class is actually created inside our project.



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If I show you the Android view here you can see that inside of a there.



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And we have this package here right inside this package.



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Now this class has created a floating view service.



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So not only that we can't establish order to make this wider.



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So we had a class called Floating view set.



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So because this is actually a service it has to be Puplick.



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So before the class keyboard to put the public key vote here because we are going to use this service



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inside our project we must declare this class as public.



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So let's go inside the curly braces of this class and first of all let me tell you that because this



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class is going to play the role of a service this class must extend from the service class.



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So that is going to be.



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And these are relationships between floating View service class and the actual service class inside



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the Android library.



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So here we are going to say a public class floating view service expense service.



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Right.



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So we are using a service class inside the Android app packet as you can see this line of code.



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It has import Android app package.



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So this is the curly braces of this floating view service.



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Now we have to override a method that is called on buying.



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So now that the override that is if it is on bind my error is gone.



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Vlei we had to override the Smurfette.



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So in order to find out why we have to override to dismiss it you can actually take a look at the documentation



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of the service class or if you are using a Mac you just need to hold down the comments on your keyboard



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and then click on the service or if you are using Windows machine you just need to hold down the control



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key on your keyboard and then click on servies.



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Now it's actually guided us to the documentation of the service class as you can see it is actually



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an abstract class and the merits of the abstract class here.



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So let's actually find the bind method.



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So let's actually scroll down here in order to find the on method.



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So in order to find the method we can actually search for the name of them if it here I can hold down



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the comment on my keyboard and then present the letter on my keyboard and I can just search for the



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and bind method.



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And if you're using a Windows machine you just need to hold down the control key on your keyboard and



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then present the letter if key on your keyboard.



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In order to search for a specific valuable or name or the name of the method as you can see we found



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that method here Puplick abstract the binder on bind as you can see there is no implementation for this



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method here.



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This means that any class that extends from the service class must provide an implementation for this



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abstract CP M effort.



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So let's close this service that of our class here.



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Now you know we had to override this method and provide an implementation for this.



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As you can see by default it just returns not.



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So now let's see what does this unbind method do.



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So in order to see the documentation of these on bind method you just need to hold down the command



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key on your keyboard and then click on this service here.



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If you are using a Windows machine you just need to hold down the control key on your keyboard and then



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click on the service here.



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And now let's search for the on unbind method on line.



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So you know that search for a specific method or a variable.



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You just need to hold down the common key on your keyboard and then present that key on your keyboard.



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And if you are using a Windows machine you need to hold down the control key on your keyboard and then



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press undeleted key on your keyboard in order to search for a specific keyboard.



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So now here it is the on buying method.



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So let's see at the top at the above of the Smurfette unbind we have this documentation of this unbind



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method.



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So let's read this documentation it says Return it means dismiss it returns.



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Actually the communication channel to the service may return gnarl or nothing.



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If clients cannot bind to the service so if it just returns the communication channel to the service



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and it's going to actually determine whether the clients actually access the service or not binded a



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service or not.



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So now let's close this so we start off by and let's go back to our Latino Buel said we start over.



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So here it is our class.



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Now we need to declare this class inside the Android manifest fight.



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So that's open the Android view and in here inside this app folder we have this manifest folder by just



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double clicking and this folder the manifest that XML file is actually opened.



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Let me double click on this to happen to make this area wider.



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Now inside this is enemy application tag we need to declare the service.



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So here it is the ending tag of this application.



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Right.



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So just let's create some space here before the ending tag.



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Now let's open attack and let's say that we have a service and our service is dead.



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Floating eusbio as you can see the auto feature the autocomplete feature of Android suit you automatically



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identifies the service inside our project because they're floating View service class extends from the



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service class.



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So it is a service.



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So now we can select this option and then we can still close this service like by just putting a slash



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up and then a closing time.



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Now this is our service and we need to also put a permission here insights manifest here at the top



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before this application I need to use the permission and the name of this permission is system alert



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window.



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So it's open attack let's say uses permission and just step in here and with the permission dot system



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alert.



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If we're just taking a system underlined alert.



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So here it is the actually option and we can select it and then press and keyboard.



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And just by putting a slash here we can self close the stack.



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So we use the pool this permission here system alerts when do we need to use this permission.



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If you actually want to use the service here inside your project.



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So that's it.



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Let's close this android manifested exemplified.



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And now I think that's enough for this tutorial in the next story.



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We're going to actually continue adding features to our application.



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So thanks very much for watching.



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If you have any questions about these concepts that I have taught you so far please post this in the



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course and then I will do my best to answer all of your questions.



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And I look forward to seeing you in the next tutorial.