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Everyone.



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So in this tutorial I'm going to actually create an object.



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OK.



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So let's actually first let's go to the activity.



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Let's go to the content underlayment and examine here.



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So let me show you the Android view at the top menu.



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Just click on View and install windows and then click on project if you want to you can actually use



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this shortcut here for Mac users.



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You can actually hold down the command key on your keyboard down and then press on the number one key



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on your keyboard.



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And if you are using a Windows machine the shortcut is different.



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It should be actually a control just hold under control on your keyboard down and the person number



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one on the keyboard.



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So just click on it.



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Now here it is.



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Our Android view.



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Right.



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It is not Android view.



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Here you can see these two little triangles.



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If you click on it you can actually see the left and right.



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So now here let's open the rest for their.



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Well there we have this folder open the layout folder and double click on this content underlayment



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and examined.



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So now let me double tap here in order to make this area wider so let's actually select this text here.



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So now let's pro-white an ID for this text.



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So what I am actually providing an ID for the state's view because I've want to interact with this text



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view from my Java coats.



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So here for the ID just step in here takes the one and then person enter on your keyboard.



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Right.



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So now you may ask what is this.



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This view here is actually called the blueprint.



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Right.



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So here look at this bar here.



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Here we have some options.



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The first one here it says let me hover over this and it says show design.



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If you just click on this one here now you can see that the blueprint is actually disappear.



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Let's look at the second icon it says show blue print.



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If I click on it now you can see that only we have the blue print here.



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So I'll talk more about blue print later for not.



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You can just see that how we can actually appear or disappear the blue paint or a design.



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And let's actually look at the first icon.



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If I click on it it says Now we can show the design plus blueprint.



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Right.



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So if you want to you can just click on this short and so that you can actually only see this design



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here.



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So the idea of these things is take Steven.



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Now let's go to the main activity class here.



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And it's actually for example create an object of a text.



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So here I can see text view.



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OK.



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So first I referred to the name of this class text view and now I can't see th Steven.



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So this is the name of the variable that you want to create here.



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Assignment operator now able to actually be fair to the user interface objects that we have in say the



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contents underlying minute exempt.



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So here first of all I can say find view by ID so you can actually find out if you buy a specific ID.



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So that's why we actually provided an ID for that actually for the text.



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So I hear I hear see or or is a class that actually holds the ideas that we actually provide for their



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user interface components inside our layout.



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So our thought Id dot the one so you can see now I can only to this takes the one Id semicolon.



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So now as you can see if you have an error it says there is an error and it says incompatible type.



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It is required Android that widget that takes view found and read that view that view.



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So it says that the variable that we have created here is actually of tapes view and now here we are



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saying find view by id it can actually find an object of type view not a text view.



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So I talked more about this later but text view let me tell you that takes is a subclass of view.



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Our view is the superclass of taste.



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So here we need to cast this takes view object the user interface component to a text view object in



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order to actually let the Android know that we are a hundred and fifty percent sure that this user interface



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components that we are referring to is of type takes view.



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So we need to actually be 100 percent sure and we need to let the Android know that we are actually



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sure that it is a test view if it is not of this view.



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Let me try to show you the lay out content underlayment an example.



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Here we have it takes you right.



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The idea is this is the one if this is not actually a tissue for example if this is a button and here



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let's go to the main activity class and here we say that this is actually a text view.



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Our application is going to crash because we have a button inside our lay out.



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And here we are saying that we have a takes.



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If I actually just for example it to a text so I must be sure that this user interface component is



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takes view and then I can go to this man with the class.



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So here I cant just put a pair of parentheses.



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So this is called casting.



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OK.



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So you know you will learn more about Castanea in Dover later for an hour to 40 and just put a pair



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of Prentice's here and just type in here takes you be capital-T and then select this one and that person



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entered on your keyboard.



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So now the error is gone but now you may actually encounter error regarding actually important actually



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and write that widget.



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So let me hear at the top you can see these imports statement.



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If I open it here you can see this plus sign here if I click on it here you can see that I auto imported



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this and write that widget that takes you if you see any errors here regarding importing their takes



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view class to our file.



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You need to put this line of code here import and write that we did to take that view but I also imported



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this class to add to my file.



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How did they do that in the next tutorial.



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You are going to learn about that.



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