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Hi everyone in this tutorial we're going to continue building this application.



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So first let's run the application.



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Now let me show you the emulator and here you can see that these buttons are actually on the top edge



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of this view.



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There is a problem here.



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Let's go back to android soon and let's go to this activity on the last minute exam.



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And here you can see that before go to create a constraint from the top edge of this button to the bottom



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edge of these critics for example so that you can see this little circle that is pulsating.



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So here let's create a constraint to the bottom edge of this.



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It takes here and release it.



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So now you can see that this constraint is created.



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So let's actually change the top margin of this button here cinches this number to number 10.



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And then person it'll change your keyboard so you can see that it's not changing.



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And it's not allowing this margin here to be actually executed.



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I think it's a bug in Android studio and in the newest version of Android studio.



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So let's actually select a spot in here again.



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Let's create a constraint to the bottom edge of this button here.



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Now let's also change the top margin to number 10.



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So now that we have this this constraint actually create it let's run the application.



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Let me show you the emulator.



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So now you can see that these buttons are actually position here correctly.



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So let's go back to roundlets studio.



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Let's click on this main activity so now let me show you the emulator.



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So first we need to actually declare some objects of type text and we need to also create some objects



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of a button.



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So here inside this main activity class to stay in here private as it takes.



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And here I can say EDT.



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Enter name but I can't say it is in the name semicolon private.



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It takes EDT M8 semicolon private's edit text EDT password semi-colon.



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Now let's declare the button.



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So private's BOTTEN PTEN signing semicolon and private's button.



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And sign up between Sign up semicolon.



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So now let's go inside this uncreate method and let's initialize our objects here our value is actually.



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So here the first one is it is the name assignment operator.



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Let's cast this object to an edit text object find view by ID or ID that EDT.



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Idiotcy internet.



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EDT enter ne semicolon EDT.



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E-mail.



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Assignment operator.



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Let's cast this object to an edit text object find view by ID or ID that EDT.



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Email.



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EDT enter the email actually semicolon.



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And finally EDT password assignment operator.



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Let's cast this object to an edit text object find view ID or that Id dot EDT password EDT Enter password



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semicolon and and here I can't see PTEN assigning assignment operator unless this object to a button



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object find view by ID or that ID that PTEN sign in semicolon.



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And finally here and sign up assignment operator button find you by ID or thought Id Dud's PTEN sign



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up semicolon.



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So now it's time to connect our Android studio project to the firebase.



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So here at the top menu here you can see these tools here right.



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Just click on Tools and then click on firebase.



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So he had this assistant is actually open right.



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So now we have this often dictation.



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So look at this description.



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It says signing and manage users with ease accept accepting emails Google signing Facebook and other



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luggin providers.



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So let's click on it and click on email and password and dictation.



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First we need to connect our application to the Firebrace So just click on this button.



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Now it says starting connect dialog out this window is opened here now we are going to create a new



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Firebrace project firebase a fire authentication.



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So this is going to be the name of our firebase project.



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So here I just need to so here make sure to actually specify a country or region and click on connected



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to Firebrace so that this message pops up and says firebase project create it and collect connected



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locally to module app..



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Now it's connected right.



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So now it's time to add firebase often to Kaisha to our application.



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So just click on the spot in and click on accept changes.



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So here it says dependencies set up correctly right.



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So now let me show you the browser here.



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Firebrace.



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So let's go to console.



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Now you can see our project here right.



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Firebrace fired authentication.



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Right let's click on this one here.



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This is the name of our project.



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Now let's click on often to cation.



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So here let's actually set up sign in Meffert.



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Leslie can see this pattern here.



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Now you can see this e-mail or passwords right.



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So here you can see this a little.



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I can hear this pencil I can actually click on it.



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Now lets enable this option here.



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Email or passport.



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And it says allow users to sign up using their email address and password.



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Or as the case also provide e-mail address verification password recovery and email address change primitives.



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You can actually take a look at the documentation.



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Let me open it another tap here so you can see actually the documentation here.



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So now let me close this this top here.



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So let's click on safe here so as you can see are actually enabled this option.



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Let's click on safe.



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Now it says e-mail or password enabled.



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Right.



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So now let's go back to android studio.



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So first let me show you these tabs here we can see you can see these.



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This users stop if I click on it you can see that it says no users for this project.



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So if any users actually sign up to our application we can see those users here.



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So let's go back to android city.



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And here let me actually close this assistant here.



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So now let's actually declared a valuable insight.



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Our main activity so just open here private.



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And the name of this rally is going to be firebase of and the name is going to be firebase over semicolon.



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So let's go inside our uncreate Smurfette here and here let's initialize our variable firebase of so



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they've been here firebase of assignment operator and just that here firebase of that get instance semi-colon.



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So first of all we need to actually create an effort in order to allow the user to sign up to our application.



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So inside this class inside this main activity class here before the curly brace of these main activity



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class I'm going to create a method.



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So just type in here private's Voyt and the name of this method is sign up sign up user.



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We e-mailed and password.



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So let's put up her of here.



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The first argument the first parameter here of this method is going to be of type streams and the name



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is going to be e-mail.



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Use that e-mail user e-mail.



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Come on.



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And the second parameter is going to be again of type streams and the name is going to be user password.



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So let's open and closed this method by using the curly braces so insert is Smurfette.



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So I can't say firebase of that create user with IIM-A and password here.



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So now you can see that this Meffert accepts two arguments.



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The first one is going to be the emet right.



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So we have an argument here from the Smurfit so I can see a user M8 comma user password.



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The second one is password right.



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It was a password.



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And let me create a new line here.



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I can actually put it here because I want to show you that I am going to call another method on these.



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And the result of the Smurfette.



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So I can't say that at uncomplete listener.



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So this is if it actually needs two arguments the first one is going to be the activity here.



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So let's specify the activity just like in human activity that this coma and now we need to actually



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created the anonymous in a class and you in on your instance.



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So just open a new on.



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So just put this or here is just hold down the shift key on your keyboard and then present the little



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Oceania keyboard uncomplete listener right here right.



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So like this one and then press are interchangeable.



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So these codes are actually generated for you automatically.



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So let me create a new line so that you can see what's going on here.



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Let's create another new line here so you can see that first we said firebase ofat create use the read



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email and password.



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So we passed the use that email and the past for here.



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So we get these values from the Smurfette as an argument and we called this move it at uncomplete listener.



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And the result of this Smurfette.



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So whatever happens this is going to be caught at whatever happens when the user wants to sign up.



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These at uncompleted this and it is going to be called.



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And we have one Mefford uncomplete So if it is going to be called when ever it was actually for example



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successful or it was some kind of error that we can we can actually solve it or for example the users



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of internet connection is gone.



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Right.



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And we have.



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Let me let's put a semicolon here.



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At the end of this actually practice is here.



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Let's go inside this Meffert uncomplete right.



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This means that the task is actually completed.



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Whether it's was successful or it was actually for but it actually failed.



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So it is Smurfit.



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I can't say so first but let's check for the condition of actually failing.



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For example the user has actually failed to sign up to an application.



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In that case I want to show a message to the user that there wasn't a problem and the user can actually



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try again.



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So I can actually say.



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So it just I think he had enough banned or not this is actually the bank operator or the not operator



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task that is successful if the process of signing up to the application was not successful.



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So look at this bank operator here is not operator then in that case we can actually say just open and



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close this if statement by using these curly braces.



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You can't say toast that make you text first let's specify the context.



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Make sure to just type in main activity that is if you just type in here is that Michoud is here.



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If you're just typing here does this he refers to this anonymous in a class here that we actually created.



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So this is not correct.



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We want to actually refer to the context which is going to be main activity that is.



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OK come on.



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So the message is going to be that there wasn't a problem.



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Try again



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OK and come on now let's specify the duration of this message which is going to be length short and



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we can't call this method show this use Toast object.



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So let me create a new line here.



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So that's it.



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So now let's create an else statement so this is a statement here is going to be executed.



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If this condition he had face this was a statement he had means that the user has successfully signed



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up to our application.



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So in that case again I can actually create a post message so toast that major text.



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So now let's specify the context which is going to be main activity that this come up and the message



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here is going to be actually 6.



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You are successfully you are successfully signed up signed up to signed up.



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That's OK.



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And now I can actually specify the duration so come up I can say lenth short that show that we create



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a new fly here.



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So that's it.



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Now if they use it to successfully signed up to our application now we need to specify the user profile.



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So when the user actually is signed in the user can actually see the display the name the display name



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the image or any other for example values.



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So now after this toasts message we are going to call another method and that if it is going to be specified



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specified user profile lets put up in our practices here semicolon.



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So we have not created this method yet.



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Right.



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So let's scroll down here.



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And after the curly brace of the Smurfit and before the end and calibrates of this class let's create



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another method.



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So just like in here private void and the name of this is going to be specify a user profile.



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Just put a pair of parenthesis here and open and close this method by using these curly braces.



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So inside is curly braces.



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I can't say.



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So just typing here.



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Firebase user just referred to this one here firebase user and the name is going to be firebase user



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assignment operator.



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So now I can say firebase oath that gets instance that gets callant user.



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So first we need to get the current user firebase user of our application.



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Right.



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And then after this line of code I can say if firebase user is not equal to gnarl then I can open and



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close this statement by using these curly braces.



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So here I can actually say user profile change request so lets create a variable after you use a profile



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change change request and the name is going to be user profile change request assignment operator new



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user profile change request that builder here.



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So now let me create a new line here not to step in here at DOT and here you can see that we can specify



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the display name and the photo you are right.



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So first in this application we just want to specify the display name and just type in here said display



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name.



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So we are ready to get the display name from the EDT name right at the emulator.



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So here we the user enters the name right.



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So we are going to get the display name from this from the value of this text.



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So instead the apprentice's I can say.



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EDT.



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Name that get text.



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That too is strange.



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And then here finally we are going to actually call this method that pilt here.



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If you want to you can also specify the photo you are.



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I just step in here that said photo.



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You are right but for this application we just want to specify the display name because the later in



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the welcome screen and the other will welcome a screen.



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We are going to get the display name from the user and we're going to show it to the user.



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So just typing here just call this method that's built and semicolon.



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So after this line of code here let me create a new line here so that you can see what's going on.



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After this line of code I can refer to this firebase use that valuable that up date profile update profile.



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And here we need to pass this a variable of type if it does one user profile change requests or just



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past this user profile change request thought at uncomplete listener OK new and just hold the shift



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key on your keyboard and then press on the little Or key on your keyboard and then present it on your



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00:16:11,020 --> 00:16:11,980

keyboard.



234

00:16:11,980 --> 00:16:17,110

So now let me create on your line and after it is the end in practice it's just put a semicolon and



235

00:16:17,110 --> 00:16:18,410

inside is accomplishment.



236

00:16:18,430 --> 00:16:27,810

Here we can say that we have this task here right and we can see if task that is successful we can open



237

00:16:27,810 --> 00:16:30,390

and close this statement by using the curly braces.



238

00:16:30,390 --> 00:16:35,670

Let's create an else statement for another condition that actually the task was not successful.



239

00:16:35,730 --> 00:16:43,890

So if we just show our message to the user here and that may create a comment here task was successful.



240

00:16:46,380 --> 00:16:54,130

OK and here inside is else black I can't say task was not successful.



241

00:16:54,280 --> 00:16:58,630

So later we're going to get the display name from the firebase user.



242

00:16:58,750 --> 00:17:03,490

But for now just look at this method here and just understand what's going on here.



243

00:17:03,490 --> 00:17:08,080

First we're getting the firebase user and we are checking that if the firebase use that is not known



244

00:17:08,350 --> 00:17:13,210

then we are going to actually say user profile change request and we are going to specify the display



245

00:17:13,210 --> 00:17:17,000

name the display name is going to be this one editing that takes the string.



246

00:17:17,080 --> 00:17:22,040

And finally we are going to call this method build and then we are going to say firebase use that update



247

00:17:22,050 --> 00:17:22,890

profile.



248

00:17:23,230 --> 00:17:26,740

And we say user profile change request that at uncomplete listener.



249

00:17:26,830 --> 00:17:28,530

So that's it this is our method.



250

00:17:28,660 --> 00:17:30,800

Now let's create another I'm afraid.



251

00:17:30,820 --> 00:17:34,240

In order to allow the user to sign in to our application.



252

00:17:34,440 --> 00:17:40,710

So again before the end in curly brace of this main activity class I'm going to create another method.



253

00:17:40,780 --> 00:17:47,500

So here just typing private void and the name of that effort is going to be signing the user signing



254

00:17:47,920 --> 00:17:53,270

the user with e-mailed and password.



255

00:17:53,320 --> 00:17:55,920

So let's specify some parameters for this method.



256

00:17:55,930 --> 00:17:59,930

The first one is going to be for the e-mail which is going to be a stream and the name is going to be



257

00:17:59,950 --> 00:18:00,760

e-mail.



258

00:18:01,060 --> 00:18:03,340

Use that e-mail actually use e-mail.



259

00:18:04,000 --> 00:18:04,570

Come on.



260

00:18:04,720 --> 00:18:10,420

And the second parameter is going to be a again of type strange and the name is going to be used a password



261

00:18:10,870 --> 00:18:13,680

user password.



262

00:18:13,700 --> 00:18:17,270

So let's open and close this method by using the curly braces here.



263

00:18:18,230 --> 00:18:27,870

Now inside the Smurfit I can say firebase oath firebase oath does signing a signing with email and password.



264

00:18:27,920 --> 00:18:30,920

So if you need to pass the email first so the email is here.



265

00:18:30,950 --> 00:18:39,500

Use an email comma and the password is going to be use a password dot at uncomplete listener at uncomplete



266

00:18:39,500 --> 00:18:41,100

listener.



267

00:18:41,330 --> 00:18:47,150

So here instead Apprentice's just a point here new and then here just hold down the shift key on your



268

00:18:47,150 --> 00:18:51,740

keyboard and then press on the little all key on your keyboard so that you can see this option.



269

00:18:51,740 --> 00:18:53,270

Uncomplete listen at here right.



270

00:18:53,300 --> 00:18:59,710

And then press on your keyboard so that Android studio puts out these codes here automatically for you.



271

00:18:59,750 --> 00:19:02,770

So lets put a semicolon here at the end of this prentices.



272

00:19:02,780 --> 00:19:05,520

Now let me create a new line here so that you can see what's going on here.



273

00:19:05,520 --> 00:19:11,360

First we actually referred to these firebase of instance and then be said that signing with email and



274

00:19:11,360 --> 00:19:11,940

passport.



275

00:19:11,950 --> 00:19:17,960

So if you passed these user email and this use a password that you receive as arguments from the Smurfette



276

00:19:18,290 --> 00:19:20,920

and we said that at uncomplete listener.



277

00:19:21,110 --> 00:19:25,190

So inside this uncle uncomplete my friend here we can actually to say.



278

00:19:25,280 --> 00:19:30,750

So you can see that we have this task object as an argument of these accomplis methods.



279

00:19:30,890 --> 00:19:38,870

Let's check for the condition that determines that the user has actually failed has been faked to sign



280

00:19:38,870 --> 00:19:40,170

into our application.



281

00:19:40,250 --> 00:19:51,140

So I can't say if not task object that is successful if the task of director is received is not successful



282

00:19:51,200 --> 00:19:55,790

here then this means that the user is paid to sign in to our application.



283

00:19:55,790 --> 00:20:01,750

So in that case we can actually show a message to the user in order to let him or her know that the



284

00:20:01,760 --> 00:20:04,190

signing process was not successful.



285

00:20:04,190 --> 00:20:08,810

So I can say that Mike takes the first minute to pass the context which is going to be main activity



286

00:20:08,810 --> 00:20:10,760

that does come up.



287

00:20:10,760 --> 00:20:12,490

And the message is going to be.



288

00:20:12,530 --> 00:20:14,200

For example there was an error.



289

00:20:14,660 --> 00:20:23,710

There was an error come up and then we can specify the duration then short data show data show.



290

00:20:23,720 --> 00:20:27,790

So let me create a new line here so that you can see what's going on here.



291

00:20:27,860 --> 00:20:29,930

Now we can create an else statement.



292

00:20:30,080 --> 00:20:36,860

So this Atlas Plug here determines that if the above condition this one is actually false This means



293

00:20:36,860 --> 00:20:40,760

that the user has successfully signed in to our application.



294

00:20:40,820 --> 00:20:46,330

In that case we want to transition to an all other activity so we don't have that activity yet.



295

00:20:46,400 --> 00:20:53,040

So let's actually put this courtsey of let's create an Internet object here into it and we can say well



296

00:20:53,040 --> 00:21:00,720

come intent will come intent assignment operator new intent.



297

00:21:00,730 --> 00:21:07,040

So first we need to pass the context which is going to be main activity that these come are.



298

00:21:07,410 --> 00:21:11,520

And now we need to pass the class or the activity that we want to transition to.



299

00:21:11,700 --> 00:21:17,220

So we want to transition to the Vellacott activity which we has not created yet so we can say well come



300

00:21:18,830 --> 00:21:21,290

that class color.



301

00:21:21,680 --> 00:21:26,090

So now say it's thought activity will come in.



302

00:21:27,220 --> 00:21:30,390

And finally we want to close the colorant activity.



303

00:21:30,430 --> 00:21:34,230

We want to eliminate the cult activity from their views.



304

00:21:34,690 --> 00:21:36,360

So we can say finish.



305

00:21:36,470 --> 00:21:42,740

So it when we call them if at finish the cult activity is going to be eliminated from the views.



306

00:21:43,090 --> 00:21:46,510

So now let's actually open our review here.



307

00:21:46,630 --> 00:21:51,350

So now we're going to create a new activity so just open this up for them open the door for her.



308

00:21:51,520 --> 00:21:53,600

So that now you can see this package right.



309

00:21:53,650 --> 00:21:55,880

Right click on this package new.



310

00:21:56,010 --> 00:22:03,820

And now let's click on this activity and let's go to these Actually it is empty activity and the activity.



311

00:22:04,120 --> 00:22:07,150

So the name of the activity is going to be wellcome.



312

00:22:07,840 --> 00:22:12,670

OK this is the name of the activity and it's going to generate a lay out a name or lay out file actually



313

00:22:12,670 --> 00:22:18,370

with this name activity on it like Wellcome and it's going to have a backwards compatibility make sure



314

00:22:18,370 --> 00:22:20,860

that this check box is not checked.



315

00:22:20,860 --> 00:22:24,240

Lots of activity this development if it is not going to be that lot of activity.



316

00:22:24,430 --> 00:22:26,530

A lot of activity is going to be the main activity.



317

00:22:26,530 --> 00:22:27,000

OK.



318

00:22:27,160 --> 00:22:28,240

And this is the package name.



319

00:22:28,300 --> 00:22:29,580

Let's get it unfinished.



320

00:22:29,860 --> 00:22:31,440

So let's wait a little bit here.



321

00:22:31,480 --> 00:22:31,880

OK.



322

00:22:31,930 --> 00:22:34,920

So now that they're welcome activity is created.



323

00:22:34,960 --> 00:22:38,500

Let's go to our actually at the welcome screen.



324

00:22:38,620 --> 00:22:44,170

Let's open our test folder here and let's open the layout folder and you can see that this activity



325

00:22:44,170 --> 00:22:46,480

underlined Welkom is actually created.



326

00:22:46,480 --> 00:22:47,810

This one is exemplified.



327

00:22:47,850 --> 00:22:49,610

Let's start because Handyside.



328

00:22:49,750 --> 00:22:57,490

So now let's try a text view into our constraint lay out here so here inside the pallet section you



329

00:22:57,490 --> 00:23:04,630

can see this takes you to distract the states here and put it under center here of this screen and you



330

00:23:04,630 --> 00:23:08,190

can see that are some constraints and actually created here.



331

00:23:08,320 --> 00:23:12,550

So selectees takes you first of all let me double click on the stop in order to make this area wider



332

00:23:12,900 --> 00:23:14,060

select is text view.



333

00:23:14,200 --> 00:23:16,990

Let's give an ID to this text.



334

00:23:17,020 --> 00:23:21,670

So the idea is going to be TXI the Wellcome and then person until Chanur keyboard.



335

00:23:21,670 --> 00:23:27,130

So now I think the position of this view is actually good if you want to you can actually change the



336

00:23:27,130 --> 00:23:28,870

position of the text view.



337

00:23:28,870 --> 00:23:32,020

Now let's try a button here into this.



338

00:23:32,040 --> 00:23:38,140

Lay out here and put it here so you can see that our constraint is actually created to the right of



339

00:23:38,140 --> 00:23:43,340

the screen and another constraint is actually created to the left here on the left edge of the screen.



340

00:23:43,630 --> 00:23:50,110

So now let's create a create a constraint to the bottom of this takes you let's create a constraint



341

00:23:50,110 --> 00:23:55,870

from the top edge of this button to the bottom of the state's view so you can see this little circle



342

00:23:55,870 --> 00:23:57,160

that is pulsating.



343

00:23:57,190 --> 00:24:02,200

So let's actually create this constraint here to the bottom of the state's view and let's change the



344

00:24:02,200 --> 00:24:06,580

top margin to 20 and then present until January 3rd.



345

00:24:06,610 --> 00:24:12,420

So now let's select the spot and let's keep an and it is button so the button is going to be between.



346

00:24:12,550 --> 00:24:17,140

Sign out and then press on until your keyboard.



347

00:24:17,140 --> 00:24:21,110

So now let's leave a text or text value to this button.



348

00:24:21,250 --> 00:24:22,690

So the text is going to be.



349

00:24:22,840 --> 00:24:27,310

So here you can see the states attribute the text is going to be sign out sign out



350

00:24:30,120 --> 00:24:31,530

from the from the



351

00:24:34,790 --> 00:24:36,870

and then press Enter key on your keyboard.



352

00:24:37,160 --> 00:24:38,630

So this is the text of this button.



353

00:24:38,630 --> 00:24:41,210

So let's go to our welcome activity class here.



354

00:24:41,420 --> 00:24:45,480

Inside this class let's declared an object a value of type takes few.



355

00:24:45,650 --> 00:24:51,800

So just they've been here a private text view private text view and their name is going to be the Wellcome



356

00:24:52,780 --> 00:24:53,850

semicolon.



357

00:24:54,260 --> 00:25:02,400

Private button and the name is going to be PETN who actually sign out and sign out semicolon.



358

00:25:02,540 --> 00:25:05,600

So let's go to our uncreate method here.



359

00:25:05,780 --> 00:25:10,980

And first let's initialize RTX the welcome here so we actually welcome an assignment operator and land



360

00:25:11,010 --> 00:25:18,400

at an inside Apprentice's just cast this object to a text view object find view by ID or dot ID DOT



361

00:25:18,400 --> 00:25:25,220

takes the welcome the XTi the come semicolon and then let's refer to our PTEN sign out.



362

00:25:25,220 --> 00:25:32,750

Assignment operator let's cast this object to our button object find view by ID or that ID that PTEN



363

00:25:32,900 --> 00:25:35,590

sign out semicolon.



364

00:25:36,020 --> 00:25:40,610

So now that we have actually initialized our objects here.



365

00:25:40,610 --> 00:25:47,210

So let's create a listener for this spot and so here I can say between sign out that sits on click listener



366

00:25:47,750 --> 00:25:52,610

knew and then hold the shift piano keyboard and then present the little Vicci on your keyboard.



367

00:25:52,660 --> 00:25:57,320

Select this option here uncle or cousin it and then person on your keyboard so that is going to create



368

00:25:57,320 --> 00:26:02,630

an anonymous in a class here and that anonymous in a class is going to actually implement this uncle



369

00:26:02,650 --> 00:26:03,990

class or interface.



370

00:26:04,010 --> 00:26:07,080

And then we have this uncle Mefford override it here.



371

00:26:07,100 --> 00:26:14,360

So now that we actually initialized objects and we actually created our listener for the Spartan.



372

00:26:14,450 --> 00:26:19,940

So let's go back to our main activity class here so you can see that we create has some if it's here



373

00:26:20,030 --> 00:26:24,270

and we haven't still called this method from anywhere inside this class.



374

00:26:24,380 --> 00:26:26,260

So we have this Smurfette here sign in.



375

00:26:26,310 --> 00:26:28,280

They use the read e-mail and password.



376

00:26:28,310 --> 00:26:34,760

We have this specify user profile so we called the Smurfette does specify user profile from the Smurfette



377

00:26:34,760 --> 00:26:36,910

from Sign-Up user with email and passport.



378

00:26:37,010 --> 00:26:41,610

But we haven't still called dismembered from anywhere inside our class.



379

00:26:41,900 --> 00:26:45,290

So let's scroll to the top here let's go into these uncreate Smurfette.



380

00:26:45,410 --> 00:26:47,790

So you can see that we have two buttons here right.



381

00:26:47,810 --> 00:26:51,100

We have this between signing and between Sign up.



382

00:26:51,140 --> 00:26:54,110

So let's create a listener for both of these buttons.



383

00:26:54,110 --> 00:26:57,670

First of all let's create a listener for the city and sign up button.



384

00:26:57,680 --> 00:27:06,330

So let's say BT and sign up that set and click listener new and then hold down the shift key on your



385

00:27:06,330 --> 00:27:08,700

keyboard and then press under the original keyboard.



386

00:27:08,700 --> 00:27:14,910

Select this option here so that so that the Android studio is going to actually write all the codes



387

00:27:15,000 --> 00:27:17,760

for you and the person in the Intel channel people.



388

00:27:18,030 --> 00:27:21,280

So now let's create a listener for their beauty and sign in.



389

00:27:21,300 --> 00:27:30,240

So just here between signing data sets uncooked listener new view that unclick listener so you can see



390

00:27:30,240 --> 00:27:30,690

that here.



391

00:27:30,720 --> 00:27:31,440

Right.



392

00:27:31,440 --> 00:27:35,240

So let's go into our Actually Betty and sign up that Satanical question.



393

00:27:35,250 --> 00:27:37,710

And inside is onco Smurfette here.



394

00:27:37,740 --> 00:27:43,230

First of all we need to get the e-mail we get the e-mail from the EDT e-mail and we get a passport from



395

00:27:43,230 --> 00:27:47,060

the EDT passport because we want to get these values from the user.



396

00:27:47,340 --> 00:27:50,180

So the input is going to be provided by the use of.



397

00:27:50,190 --> 00:27:56,010

So let's say let's create a local variable here inside this uncle Mayford strange and the name of this



398

00:27:56,010 --> 00:28:02,270

variable is going to be user user made like assignment operator.



399

00:28:02,440 --> 00:28:11,180

So now let's actually refer to our EDT email that just text that to strange semicolon.



400

00:28:11,440 --> 00:28:14,010

Now let's get the passports from the user again.



401

00:28:14,050 --> 00:28:20,080

Let's create a variable of type street the name of the variable is going to be user password assignment



402

00:28:20,080 --> 00:28:20,850

operator.



403

00:28:21,010 --> 00:28:23,380

And again EDT password.



404

00:28:23,720 --> 00:28:28,220

That's a text that stream semi-colon.



405

00:28:28,430 --> 00:28:34,880

So now that we have to use that email and they use a password here now we can actually call that sign



406

00:28:34,880 --> 00:28:39,110

up the users beep email and password Meffert that be created inside our class.



407

00:28:39,110 --> 00:28:45,740

So let's actually first of that method sign up sign up the user with email and password.



408

00:28:45,740 --> 00:28:46,460

Choose this one.



409

00:28:46,460 --> 00:28:48,740

Sign up users with email and password.



410

00:28:48,740 --> 00:28:50,760

Now if it needs to arguments.



411

00:28:50,770 --> 00:28:53,930

So let me call this Meffert again so that you can see those arguments.



412

00:28:54,350 --> 00:28:58,560

If the first argument is going to be use it and the second argument is going to be used that passport.



413

00:28:58,580 --> 00:29:06,880

So if you have to use an e-mail here and the use of Hallsworth here so this user e-mail Khama user password.



414

00:29:07,110 --> 00:29:07,680

Right.



415

00:29:07,800 --> 00:29:13,490

So now let's go to our Betty and sign in that certain click listen in my foot here and inside his uncle.



416

00:29:13,590 --> 00:29:16,190

Again we need to get the e-mail and the passport right.



417

00:29:16,200 --> 00:29:21,390

So let's copy these two lines of plot here inside this uncle of this PTEN sign up that said Uncle Clisson



418

00:29:21,480 --> 00:29:25,000

let's copy these two lines of code and let's paste it here.



419

00:29:25,380 --> 00:29:31,730

And now we can actually call this Smurfette signing the user with IIM-A and password.



420

00:29:31,920 --> 00:29:36,660

OK at this time let's call this method saying the user will email and password.



421

00:29:36,660 --> 00:29:42,810

So again we need to pass that use an e-mail comma and user password right.



422

00:29:42,840 --> 00:29:43,890

So that's it.



423

00:29:43,890 --> 00:29:54,420

So now that we actually provide some implementations for these two methods here we can run our application.



424

00:29:54,420 --> 00:29:57,630

So first let me let me open the web browser.



425

00:29:57,630 --> 00:30:02,880

So here it is my firebase console and you can see that I actually click on it clicked on often location



426

00:30:02,910 --> 00:30:05,920

and it says no users for this project yet.



427

00:30:06,150 --> 00:30:08,490

So let's go back to our Android studio.



428

00:30:08,580 --> 00:30:12,920

Let's run our application let's select one of these devices and then click on OK.



429

00:30:12,990 --> 00:30:16,220

So now you can see that our application is running on the simulator.



430

00:30:16,410 --> 00:30:18,420

So let's pro-white our name for the user.



431

00:30:18,420 --> 00:30:28,790

So the name of the use that is for example person person a right and let's provide an email here for



432

00:30:28,790 --> 00:30:40,200

example I can say person A at sign exampled dot com example that's come and here the password of the



433

00:30:40,200 --> 00:30:40,770

user.



434

00:30:40,800 --> 00:30:42,990

We can't say a b c d.



435

00:30:42,990 --> 00:30:50,220

One two three four five six seven eight right now if I click on signing now it says there was an error



436

00:30:50,310 --> 00:30:50,560

right.



437

00:30:50,580 --> 00:30:57,940

We cannot sign in because the user is not signed up to our application yet let's get he can sign up.



438

00:30:58,080 --> 00:31:01,170

Now it says you are successfully signed up.



439

00:31:01,170 --> 00:31:07,340

Now if I go back to our firebase consul here let's actually refresh this page here.



440

00:31:07,350 --> 00:31:13,550

Now you can see that this person here is actually created the identifier is this email.



441

00:31:13,770 --> 00:31:19,500

And you can see the date of the creation signed in here the signing date.



442

00:31:19,500 --> 00:31:21,090

And they use edu I.D..



443

00:31:21,270 --> 00:31:21,600

Right.



444

00:31:21,600 --> 00:31:24,570

This is actually a unique value for each user.



445

00:31:24,570 --> 00:31:25,330

So now let's.



446

00:31:25,330 --> 00:31:26,870

Let me show you the emulator.



447

00:31:26,940 --> 00:31:28,160

So now I want to sign in.



448

00:31:28,200 --> 00:31:29,300

Let's go to consignee.



449

00:31:29,370 --> 00:31:30,510

Let's wait a little bit here.



450

00:31:30,510 --> 00:31:34,420

Now it transitioned to this welcome activity here.



451

00:31:34,800 --> 00:31:39,870

And you can see that we have nothing in place of this text view and we have this button here sign up



452

00:31:39,870 --> 00:31:41,300

from the from the app.



453

00:31:41,340 --> 00:31:44,730

If I click on this one button here nothing happens.



454

00:31:44,730 --> 00:31:47,460

So let's go back to our Android studio here.



455

00:31:47,850 --> 00:31:49,710

And now let's go to our welcome activity.



456

00:31:49,710 --> 00:31:53,710

So here let's create an instance of type firebase.



457

00:31:53,730 --> 00:31:54,130

OK.



458

00:31:54,240 --> 00:32:01,400

So here inside this welcome class let's create a variable of type of firebase of firebase 0.



459

00:32:01,970 --> 00:32:05,310

And the name of this instance is going to be firebase over semicolon.



460

00:32:05,360 --> 00:32:11,360

Let's go into our uncreate method here and let's initialize initialize our firebase of so let's refer



461

00:32:11,360 --> 00:32:13,720

to these fires of assignment operator.



462

00:32:13,910 --> 00:32:18,080

And here I can say firebase of that get instance semi-colon.



463

00:32:18,110 --> 00:32:20,550

So now we have an instance of the fire.



464

00:32:20,620 --> 00:32:21,380

Right.



465

00:32:21,530 --> 00:32:23,490

So here let me show you that.



466

00:32:23,510 --> 00:32:25,320

Let me show the firebase concert here.



467

00:32:25,490 --> 00:32:28,880

Let me show you that if you want to I can actually delete this user here.



468

00:32:28,900 --> 00:32:35,090

I can just click on this ellipsis button and here I can click on delete account or disable account or



469

00:32:35,170 --> 00:32:36,380

reset passport.



470

00:32:36,740 --> 00:32:38,850

So let's go back to android studio.



471

00:32:39,020 --> 00:32:41,710

So here I want to check for that condition here.



472

00:32:41,750 --> 00:32:47,300

So now after this line of code after getting the instance of the firebase off I can say if Firebrace



473

00:32:47,310 --> 00:32:53,960

oaf that gets current user gets kind of user is equal to Gnarl.



474

00:32:54,030 --> 00:33:00,690

This means if the current user does not exist or if the current users account is actually deleted then



475

00:33:00,810 --> 00:33:04,460

I don't want the user to be inside this activity.



476

00:33:04,530 --> 00:33:06,560

I want to actually go back.



477

00:33:06,560 --> 00:33:14,820

I want the user to move to the main activity here first I can say to create an intent here so intent



478

00:33:15,920 --> 00:33:22,580

main activity intent may activity intent assignment operator.



479

00:33:22,640 --> 00:33:29,510

So here we can say new intent and then first we need to actually pass the context which is going to



480

00:33:29,510 --> 00:33:35,710

be a welcome that does come up and then we need to pass the class that we're going to transition to.



481

00:33:35,810 --> 00:33:43,940

So the class is going to be main activity that class main activity that class semi-colon.



482

00:33:43,940 --> 00:33:47,600

So now that we have this intent here I can see start activity.



483

00:33:47,610 --> 00:33:52,200

So now we need to pass the intent main activity intent.



484

00:33:52,220 --> 00:33:57,070

And finally I want to close this activity the current activity level comm activity.



485

00:33:57,080 --> 00:34:03,520

You want to eliminate the current activity from the view stacks so I can say finish.



486

00:34:03,650 --> 00:34:04,750

Right.



487

00:34:04,830 --> 00:34:12,200

So now after this if statement here I can create another if statement and I can't say enough firebase



488

00:34:12,210 --> 00:34:18,430

of that gets current user is not equal to knol.



489

00:34:18,960 --> 00:34:24,450

This means that actually our ease of use they're here inside that application and the kind of user is



490

00:34:24,450 --> 00:34:25,480

not equal to anon.



491

00:34:25,620 --> 00:34:28,440

That means that we have a user right.



492

00:34:28,470 --> 00:34:36,660

So now I can CTX TXI the Welkom that set text and I can put two coats here and on here I can say how



493

00:34:36,660 --> 00:34:37,640

are you.



494

00:34:37,980 --> 00:34:40,440

How are you comma space.



495

00:34:40,620 --> 00:34:43,530

Plus I use the concatenation operator here.



496

00:34:43,530 --> 00:34:51,230

Firebase oath that gets current user that gets this plaining that get display name.



497

00:34:51,390 --> 00:34:52,300

That's it.



498

00:34:52,300 --> 00:34:54,950

In this way we get that explaining from the user.



499

00:34:55,170 --> 00:35:00,950

So you may remember that we actually created MFX inside our main activity class here.



500

00:35:01,210 --> 00:35:03,700

And this is them efforts specify user profile.



501

00:35:03,720 --> 00:35:05,120

And here we are specified.



502

00:35:05,460 --> 00:35:09,780

They use their display name here right set to display name it its name but it takes that to strange



503

00:35:10,110 --> 00:35:10,630

right.



504

00:35:10,890 --> 00:35:16,650

So inside this Welkom class we are getting the display name from that value and we are sitting that



505

00:35:16,650 --> 00:35:18,510

this plane into this text the Wellcome.



506

00:35:18,570 --> 00:35:23,540

So now it's time to actually implement this Arncliffe method here of this city and sign out that said



507

00:35:23,540 --> 00:35:27,150

unclick the center first of all we want to sign out from the firebase.



508

00:35:27,150 --> 00:35:31,010

So I'm going to say firebase oath that sign out.



509

00:35:31,480 --> 00:35:31,900

OK.



510

00:35:32,010 --> 00:35:36,720

It's as simple as that by just calling the Smurfette on our Firebrace into instance we are going to



511

00:35:36,720 --> 00:35:40,500

sign we're going to get signed out from our Firebrace project.



512

00:35:40,770 --> 00:35:47,400

And here time to actually write the codes in order to let the USEF to go back to the main activity to



513

00:35:47,400 --> 00:35:49,150

the luggin page actually.



514

00:35:49,170 --> 00:35:55,170

So now we have actually already created these quotes here inside our statement let's copy these quotes



515

00:35:55,170 --> 00:35:57,070

here and let's paste them here inside.



516

00:35:57,070 --> 00:36:01,890

It's unclear if at and below this line of code first we created this intent and then we called this



517

00:36:01,890 --> 00:36:02,150

Meffert.



518

00:36:02,160 --> 00:36:04,160

And finally we called the finish of it.



519

00:36:04,170 --> 00:36:04,600

OK.



520

00:36:04,830 --> 00:36:07,620

So now let's run our application again.



521

00:36:07,650 --> 00:36:09,330

Let me show you the emulator.



522

00:36:09,390 --> 00:36:11,970

So here we have the name of the user.



523

00:36:11,970 --> 00:36:20,080

So for example the name of the use that is for example be e-mail that user is the person the person



524

00:36:21,850 --> 00:36:31,050

at sign example does come and the password of the user is for example 1 2 3 4 5 6 A B C D E F.



525

00:36:31,060 --> 00:36:31,500

OK.



526

00:36:31,810 --> 00:36:33,850

So now let's click on sign up.



527

00:36:33,850 --> 00:36:37,950

Now it's going to say you're successfully signed up to our application to the app.



528

00:36:38,050 --> 00:36:44,440

Now you can see this message if I go to our firebase console let's refresh this page here.



529

00:36:44,440 --> 00:36:48,070

So here you can see these are actually the image here.



530

00:36:48,100 --> 00:36:50,060

This is actually signed up successfully.



531

00:36:50,060 --> 00:36:51,610

Let's let me show you the emulator.



532

00:36:51,610 --> 00:36:53,360

So now let's sign in.



533

00:36:53,440 --> 00:36:54,890

Now it says how are you.



534

00:36:54,890 --> 00:36:58,430

Be and we have this button sign on from the app.



535

00:36:58,440 --> 00:37:01,950

If I click on it now we're going to get signed out from the app.



536

00:37:02,040 --> 00:37:03,260

Right.



537

00:37:03,270 --> 00:37:03,780

So that's it.



538

00:37:03,780 --> 00:37:09,120

If I go back to android studio we can add another functionality and extra functionality to this application.



539

00:37:09,120 --> 00:37:13,470

Let's go to our main activity class and let's go to our uncreate Smurfette here.



540

00:37:13,860 --> 00:37:21,810

So here after getting the instance this firebase of instance year we can actually say if firebase oaf



541

00:37:22,250 --> 00:37:25,810

that the current user is not equal to Gnarl.



542

00:37:25,920 --> 00:37:33,190

This means that a user already actually created an account and signed it signed into the firebase app.



543

00:37:33,540 --> 00:37:39,480

Then in that case we can actually just transition to the Welcome screen we can create and intent here



544

00:37:39,480 --> 00:37:44,490

intent Wellcome intent Welkom intent.



545

00:37:45,570 --> 00:37:49,860

As Simon approached your new intent and first we need to pass the context which is going to be main



546

00:37:49,860 --> 00:37:59,900

activity that this karma Welkom that class Wellcome thought class semicolon and then we can say start



547

00:37:59,930 --> 00:38:02,630

activity Welkom intent.



548

00:38:02,960 --> 00:38:09,020

And finally we can actually call this method finish so that that this view here is I mean I think it



549

00:38:09,020 --> 00:38:11,630

is going to be removed from their views.



550

00:38:11,840 --> 00:38:12,270

OK.



551

00:38:12,500 --> 00:38:14,540

So let's run the application now.



552

00:38:14,630 --> 00:38:15,940

Let me show you the emulator.



553

00:38:15,950 --> 00:38:16,850

Now we can see.



554

00:38:16,850 --> 00:38:23,400

So for example let's actually for example say name of the user is see the email of the use it is.



555

00:38:23,400 --> 00:38:30,320

See person C per cent as an example that's come and pass will of the use that is for example again one



556

00:38:30,320 --> 00:38:34,940

two three four five six seven eight is s the b c v.



557

00:38:35,120 --> 00:38:35,600

OK.



558

00:38:35,720 --> 00:38:37,100

Let's click on sign up.



559

00:38:37,100 --> 00:38:39,490

Now it says you are successfully signed up to the app.



560

00:38:39,500 --> 00:38:42,100

If I click on signing.



561

00:38:42,120 --> 00:38:44,650

OK so now you are signing into our application.



562

00:38:44,700 --> 00:38:49,660

So not is that we are still signed into our application and now you want to actually close this app.



563

00:38:49,700 --> 00:38:50,690

Ok close.



564

00:38:50,730 --> 00:38:54,610

So let's go back to android studio let's run the app again.



565

00:38:54,660 --> 00:39:01,200

Let me show you the emulator and now you're going to automatically signed up signed in to our firebase



566

00:39:01,200 --> 00:39:01,550

app.



567

00:39:01,590 --> 00:39:02,310

You can see that here.



568

00:39:02,310 --> 00:39:04,800

How do you see sign out from the app.



569

00:39:04,800 --> 00:39:06,060

That's it.



570

00:39:06,060 --> 00:39:11,050

So these are actually capabilities of the firebase backend.



571

00:39:11,550 --> 00:39:17,570

And if you want to if you want to add more features to your application make sure to actually firebase



572

00:39:17,590 --> 00:39:24,720

documentation or searching that stack overflow in order to solve the solution for your problems for



573

00:39:24,720 --> 00:39:26,110

your program problems.



574

00:39:26,280 --> 00:39:30,490

And then you will be able to actually create awesome applications.



575

00:39:30,630 --> 00:39:31,800

So that's it.



576

00:39:31,800 --> 00:39:35,790

If you have any questions please post the discussion in the course and then I do my best to answer all



577

00:39:35,790 --> 00:39:36,930

of your questions.



578

00:39:36,930 --> 00:39:39,700

Thank you very much for watching and I'll see you in the next tutorial.