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Welcome back.

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And this video, we are going to make a couple of changes to our application allowing us to edit and

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delete the entries.

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OK, therefore, we will need to set up these two methods update record dialogue and delete record dialog.

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I'm going to go over those in this video and there's a lot happening there, so it will be a longer

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video and the general goal is to, well, pass them to our item adapter.

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Let me see.

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So too, the item adapter here, because in the last video, we uncommitted this item adapter stuff

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that we had prepared before.

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So this update listener as well as this delete listener.

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So let's put them back in and let's put this update listener invoke back in as well and this one.

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So we're going to invoke the method that we will use as a delete listener, which will be some sort

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of a it will be a lambda right.

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It will be a anonymous function.

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And we're going to invoke that anonymous function, passing the idea of the individual item that we're

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currently at in order to then allow to click on the update and the delete buttons.

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So let's go ahead and implement those methods and therefore we will need to make a change to this item

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adapter.

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Don't be confused about the video not having this stuff here, because as I said, I cut the video a

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little bit.

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So the video is going to like this stuff, but we are going to have to now implement everything that

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we need to add to the item adapter for it to work.

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So let me comment this out.

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For now, we are going to implement it in this video, however.

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OK, so let's get started.

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So let's set those two up.

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Therefore, I'm going to comment this out for now, and let's prepare the update record entry.

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So let's create this function update record dialog, which is going to be internally, then updating

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our data.

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So we need to get the ID of the item that we want to update, and we need to get the employee down in

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order to make changes to our database.

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Because the employee now, as you recall, has all of these functions like insert, update, delete

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and so forth.

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But in order to get access to it, we need to get the employee down object.

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So we are going to use an update dialog.

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Which is just going to be a dialogue object.

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OK?

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A dialogue with the context of this, and it's going to use the theme dialogue style.

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OK, so there's this style said, Ah.

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And let's see theme dialogue.

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I think this one would be good theme.

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Have competition.

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And we need to import the dialogue class for this to work.

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OK, now let's set up this update dialogue.

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So let's give it a property of said Kent syllable.

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So said Cancel Lobo.

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Which is this one, and we're going to say that this is not going to be cancelled in the sense that

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you cannot click away from it.

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So if you want to update, clicking next to it will do nothing.

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Only once you click on the update or the cancel button.

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OK, so we say, said Constable Faults, and now we need to set up the binding object.

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So binding will be our dialog update binding and we inflate our layout inflator here.

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So basically, we're saying I want to use this dialogue update x l file this one here.

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And because we're using view binding, we can access this XML file using the name of the XML file binding

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and then we can inflate with the layout inflator.

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Now we can use this dialogue binding for this XML file that we just looked at to set the content view.

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So we're saying binding that route.

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So what's happening here is if you look at it, it just sets the dialog to appear or to look like this

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XML file so that this design here which we have created, which has this update record, name and surname

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and so forth because we want to be able to edit it, right?

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OK.

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So now that we have set up how this dialogue is supposed to look like, let's take care of preparing

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our data.

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So when we click the update button, you see that the added texts are populated, so they're not empty.

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We're not saying updated with a new entry.

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We're saying it's updated with what we have in the entry already and now you can make changes to it.

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So that's how a good updated functionality would work.

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Of course, you could also not populate those two, but I want to populate those added texts with the

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data that is inside of the database for that particular position.

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So how do we get that?

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Well, we can use our lifecycle scope again because this is stuff that has to run in the background.

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So we need to use call routines here.

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So we are inside of this quarantine scope and we can now use our employee down to call its methods.

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And I'm going to call the method that will give me a particular entry.

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So I'm going to get the employee by its ID, by passing the ID and collecting the data.

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So I'm using the collect method here, which I can then get the data from our binding object.

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So binding that had a text update name that set text.

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And I can set the name here.

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OK, so it, Missy.

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So this collect method should give me the it.

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If that's not the case, then I'm doing something wrong here, let me check.

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So I'm dial fetch employee.

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Thought collect.

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Now, OK, so it was just an arrow there.

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I don't know, maybe I misspelled something.

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But now you see we get it, which is the employee entity.

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So this is a lumber here.

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You see, we get the employee entity, which is our employee object.

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So if you look at it, it gives me the name of the employee entry.

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OK, so now let's do the same thing with ITI update email ID, and this one will be also the sad text.

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And here we need to use it or it email.

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OK, so we're now assigning the email as well.

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OK, so this is where we are populating the data here.

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So this information into the added text.

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So now let's add what should happen once we click on the update button this one here.

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So let's use our binding object again.

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That TV update to set on click listener.

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So once we click on the update button, we want to execute some code, and this is the update button,

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which is not really button, it's a text view, but it's fine.

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I called the TV update, which is a text view update, which is this one here.

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So if you look at the ID, it says TV update.

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OK, so now here we can now get the name from those or we need to get this value.

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We need to get this value.

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So we get those from the edit text, right?

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So the name, we get it from our binding that it update name, text to string.

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And the same thing for the email, so email will be binding that he tee up the email ID, but text the

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string, so we get the text and we make a string out of it because that's what we want to store inside

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of this email variable.

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So now we can check if those two aren't empty, because if the user for some reason entered an empty

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entry, then we don't want to do anything.

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So if name is not empty and our email is not empty.

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Only then do we want to store something, so only then do we want to do a similar thing, as we did

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with the create method you recall here where we inserted something and we, well, we need to close

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the dialog at this point.

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But here you see, we used to empty out inserts to empty your entity with the name and the email.

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So let's do something similar here.

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Let's use our employees Guidall.

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But of course, this is again stuff that has to run in the background, so use a call routine again.

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So here, let's use our employee down to call the update method at this update method needs to an employee

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entity.

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OK, employee entity object with the ID that we want to change the name that we want to change and the

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email.

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So here you see, the name and email is not enough.

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We need to pass the ID as well because we want the only update one particular item, because if you

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look at the update method, you see, well, you don't see much.

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It's just an empty entity that we need to pass, which has those values.

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So when you're creating, you don't need to add the ID because the IDs generate for you automatically.

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But when you're making changes, you need to pass the ID.

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OK.

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So why are we doing all of this update stuff before even displaying the data?

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Well, the problem is we can't display the data because our adapter uses the update stuff as well.

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So if we would have not used to update listeners here, it would have been a lot easier.

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So if we were to comment these two out and comment this part out here, we could get the data without

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doing the update stuff.

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OK, but we're doing everything at once.

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So let's look at this.

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So we have the employee.

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Don't we now update the entry?

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And now let's also let the user know that we updated the record.

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So we're just displaying it via toast.

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And let's make sure that the dialog that we have just opened is going to be dismissed because it's super

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annoying if you have to update and then cancel too close to record.

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So we want to dismiss the dialog as well.

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And if they are empty, so if either of them is empty, I'm just going to have this else block here,

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which is going to display name or email cannot be blank.

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OK.

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And now you see, we have two buttons that we have to update and the cancel button now let's also implement

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the cancel button.

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So let's say binding dot TV cancel.

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So once we click on it, which means we need to add an account, click listener.

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Let's dismiss the update dialog as well.

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And of course, what's super important, we need to shoulder update dialogue at all.

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OK, so this method will never be called because we are not setting up the data into our recyclables

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so we can notice it until we have displayed everything.

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So that's our update record dialog.

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Now let's look at how we can have a delete dialog.

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OK, we'll be very similar because if you look at it, well, it just this very basic dialogue here.

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Super simple, yes, no delete record.

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But it also needs to have the ID needs to know which idea we want to delete.

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So let's created fun delete record alert dialog.

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So we're using an alert dialog this time and not a custom dialogue that we created manually.

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So with this record update record dialog that we created based on our own XML file.

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But here we're not using that.

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We're just using a default alert dialog.

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So we need to pass the ID, which is of type integer, and we need to pass in the employee double in

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order to well, then be able to make changes to the database.

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So let's create the builder object, which will be the alert dialog builder.

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With the context of this, then we need to set the title, so said title, which will be the delete

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record title, which you see here, the lead record is just a title.

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And then I need to set the positive button and the negative button, so this is the negative button,

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this is the positive button.

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So let's set those up.

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So use the builder that set positive button.

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And here we need to say which text it should display.

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So I'm going to say yes, and now we can use this lambda in order to, first of all, get the dialog

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interface here.

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So if you look at it, we get the dialogue interface as well as another entry.

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I'm not going to use that.

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So this will be the lander and I'm going to use and now I can use my lifecycle scope.

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Launch it again because here we're actually going to do the little delete thingy.

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So once we click on the Yes button, then we want to delete.

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So here I'm just going to use employee Dow to lead the employee entity.

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Employee entity at the current ID, so that the idea that we get from calling the method will be passed

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ID to the method itself.

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And then we can also let the user know that we made the change, that we deleted this, so we make the

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text here, we delete it and we need to show the post and then we also want to make sure that we close

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the dialog interface.

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So now if we click the no button.

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Then I also want to this Mr interface, the dialogue.

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OK, so here builders said negative button, I'm going to say, no, I'm going to get the dialogue interface

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and the which which I'm not using so we can use to underscore here as well.

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This is the lambda expression that I'm using and this missing the dialogue here.

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So if you click on, no.

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So now that we have set up the alert dialog builder.

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So this builder and we can now set up the alert dialog itself, which is going to be of type alert dialog

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and to can put like this, I can use my builder and call the Create Method, which will now create the

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alert dialog.

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And now I'm going to make this alert dialog.

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Also not cancel lable.

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So set cancel concealable to false.

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And then let's display the alert dialog.

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So show it.

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Otherwise it won't do anything.

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And now this function, we can make it private because no other class can use it anyway, so I should

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use it.

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Because they wouldn't have an employee Dow, I guess.

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And the same goes, by the way, for the update record.

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So private fund update record dialogue.

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OK, so now that we have those methods ready, we can use them in and set up lists of data into our

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recycler view.

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So if the employee list is not empty, let's set up our item adapter.

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We have the employee list.

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We get that here.

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OK, we get it passed to our method.

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So here we now pass in the employee list.

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And now what I'm going to do is I'm going to create a closure here where I get an integer, which is

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the update ID.

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So Update ID, I'm going to use this number again, use my update record dialog percent to update ID

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as well as the employee, though.

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All right.

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And now.

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Let's do the same thing with our final entry.

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And that is the.

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The lead listener.

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OK, so the lead listener here, it's the delete idea that I get.

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They lead I.D. again a London, and I'm calling the delete record alert dialog, I pass into the lead

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ID.

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And I use my employee, though.

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Two now deleted.

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So here basically, this is this entire quote here is basically just setting up this item adapter because

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you see if we look at our item adapter, it requires an update listener with an I.D. and the lead listener.

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So we used this idea that we're getting and we're calling the update record dialogue method.

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This one here, which will then.

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Take that idea and to empower you, Dole to update the current entry.

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And the same goes for the Delete ID.

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So we used that here as well to then delete the entry of using the delete record dialog.

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So the dialog itself takes care of the deletion, which only happens once you click on the Yes button.

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OK.

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So now that we have the item adapter.

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OK, at this point, we are going to implement these things as we had done before.

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So just make sure that you have the item adapter with the correct settings here and set up all of this

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binding stuff.

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And also just quickly, because I'm not sure what I explained it correctly so this year is basically

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we are creating what we need to pass to our item adapter, which you see is an update listener that

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is a function that returns nothing.

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OK, so we're basically creating this function call of like an anonymous function here where we used

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the update aid that is given to us.

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So we are getting the ID and we're making sure of that up here so where we are invoking it with the

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ID.

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So the update ID, the same goes for the Delete listener ID.

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So we are invoking when we click on the items, we are invoking this method, which then invokes or

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calls the update record dialog method, and it takes the update I.D. that we get from our item adapter

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when we invoke it for the specific line that we are currently looking at.

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OK, so that's what's happening here with this line as well as with this one here.

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OK, now let's test this application and see what it's going to look like.

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So we see here we have our Dennis Infowars.com and I can now delete the entry.

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You see, it's gone.

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So now let me add another entry here again, add record and click on the edit button, which unfortunately

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doesn't work correctly yet.

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So we have this update window wood, which opens up, but it's not working correctly.

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So we are going to create our own style for that.

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So I mean, the themes folder now and I unfortunately have to create my own style because otherwise

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doesn't seem to work correctly.

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So the style that I'm going to use, and this is really just the last part that we need to add to this

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video then we're done.

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I'm going to call this one theme dialog.

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OK, and the parent of it will be the theme overlay app compared to dialogue.

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OK, and now the style will have an item name of Android with major.

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Let me see.

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It's called Android when we know men with major.

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OK, so Android calling this a property call like this, and I want to set that value to 90 percent

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because I want to make sure that it takes 90 percent of the width of the screen and the minor should

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also be 90 percent of the screen.

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So I want to make sure that this dialogue is going to take 90 percent of the screen with otherwise,

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it's just not going to do correctly.

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So now we just need to use this theme dialogue that we just created.

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So our style theme on the score dialogue, the one that was just created instead of our update record

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dialogue function.

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And now we should be golden and finally be able to update entries as well.

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So let's go over here.

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Let's update this.

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You see, now it's taking 90 percent of the screen and it seems to work.

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So the email address that I entered wasn't correct.

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So let's use the correct one or a proper one.

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Let's click on the update method, and you see the update has been done.

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However, we still have one little while you could say security issue in our application, and that

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is once we do click on the update method, we're not checking if the ID employee employer entity is

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in fact empty or not.

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So let's just make sure that it really isn't null.

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Before we do the binding.

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OK, before we find the employee entity to our updated features.

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So if we run this again now, then we should see you me had something here at this record.

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Let's make a change.

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It's updated and now deleted, and you see our application doesn't crash.

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Everything is good.

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And now let's make a change to this one as well.

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Update And now, well, not deleted.

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It's now deleted and we see no records available.

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OK, so now we have a running application which does all of the crude operations.

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I know it's been quite a bit that we had to set up.

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It's quite a bunch of code and we are using a bunch of concepts that we have not used before, like

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flow, like a bunch of add annotations here using Dow and using couple routines a lot and room, and

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it's quite a bit.

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But the thing is, once you've done it once and you have the general structure for such an application,

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you can now easily extend it.

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And to then, the next time that you need to use a database, you can just use this as an example.

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OK.

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So that's it for this video.

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Let's implement this into our seven minute workout app.