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Hire everyone in this story we're going to create a model for our project.



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So he has just opened the android's view.



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And then here inside this job you can see this package right click on it and let's create a new package



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here.



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So the name of the package is going to be model and then click on OK.



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So now we have this package named mod..



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Right click on it and let's create a class jobber class and the name of the class is going to be a country



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data source data source.



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So this is the name of the model class.



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So that kind is class and here don't change anything.



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Just kidding kind of OK.



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So you can see that our model is created let's double click on this top here in order to make this area



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wider.



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So let's create a constant here instead these classes.



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They've been here public static final screens.



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And the name of this constant is going to be country underline key right.



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Assignment operator and let's assign the spider you to this constant country semicolon.



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Let's create another constant.



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So public static final and this time that data type of this constant is going to be float and the name



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of this constant is going to be minimum minimum underline



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confidence underline level



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assignment operator and let's assign this value zero point free or 0.4.



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I think 0.4 is good for minimum confidence level.



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So here because it is actually of type float we must put the letter F here at the end of our value here.



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Otherwise the compiler may think that we are actually creating a double value so it doesn't matter whether



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it is that it is actually capitalized or it is not capitalized.



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You just need to put a letter year after your value here and then again.



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Let's create another constant public static final strange on the name of this constant is going to be



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default default on the line country underline name assignment operator.



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So here let's assign this value Canada Canada semi-colon.



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So the default country name is going to be Canada.



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Let's create another constant go public static final and this time the data type is double and the name



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of this constant is default on the line country underlined latitudes



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assignment operator.



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So here we need to assign the latitude of the country named Canada to this constant.



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So let me show you the Google maps here.



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So you just need to tell this you all here in your web browser search bar here and now you can actually



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search for Canada and just click on it so it can actually show you the Canada here.



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Right.



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So if I click on this channel the name here you can see this country here.



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But let's right click on it and now let's click on what's here.



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So here you can see the latitude and longitude here right.



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So let's click on it.



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So now it's going actually show us it's going to give us the latitude and longitude So let's copy this



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right here in this search spot.



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Let's go back to Andrew in studio.



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Now let me actually create a comment here and let's paste this rally here.



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So for that latitude let's just copy this value and assign it here to this constant semi-colon.



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So let's create another constant for the longitude so public static final.



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And now let's actually specify the data type which is double and the name of this constant is going



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to be default underline country underline longitude assignment operator and let's copy disvalue here.



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This longitude copied and assign it to this constant semicolon.



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So now let's create the final constant here.



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So just type in here public static final strange and the name of this constant is going to be default



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default underline message assignment operator two coats.



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And here's a safe in here a welcome exclamation point semicolon.



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So that's it.



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These are the constants that we need inside this class country datasource.



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So let's put some other quotes here.



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So now let's create an instance variable here inside this class.



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So this step in here private and the data type of this variable is going to be hash table.



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So what is hash table hash table is actually consists of cheese and values.



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Right.



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So each item inside our hash table is going to have a key and the value for that key.



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So when we referred to that it's going to give us the value of that specific key.



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So let me show you that here.



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It's actually a lot like dictionaries in other programming languages if you are actually familiar with



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them.



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But I'm going to actually explain to you how it is implemented and how it is how you can actually define



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fashionables in Android.



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So first you need to put the angle brackets here and I told you first we need to specify the data type



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of the key which is going to be strange comma.



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And then we need to specify the data type of the value of that key.



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Again it is going to be of type.



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Strange.



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Right.



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So here I can say countries too.



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Now I need to specify the name of this hash table idea.



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So the name is going to be countries and what countries and messages Soviet we are going to have a specific



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country.



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And the message that is dedicated specifically to that country.



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So I'm going to actually show you how it how it works and then you explain and then you will understand



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it more actually better.



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But don't forget if you don't understand it now.



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For now just write the codes here and then it will make sense.



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So now it's time to create a constructor for this class country datasource.



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So just open here public.



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So this is the access modifier of this constructed and the name of the constructor must be the same



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as the name of the class.



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So it is going to be country data so it's just put a pair of Prentice's here.



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So I'm going to specify that there is going to be a parameter here for this constructor which is going



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to be off that hash table.



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Just put two angle brackets here.



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First I need to specify the data type of the key comma and then the data type of the value.



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And here to specify the name of this prime feature which is going to be countries and messages.



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So just open and close this constructed by using these curly braces and inside the body of the constructor



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I channel referred to these countries and messages instance variable by just typing here.



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These talks countries and messages assignment operator.



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And then I can refer to these argument countries and messages and I can assign these argument to this



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instance variable so I can refer to these arguments name here.



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Right.



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That's it.



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So after this constructor let's create a method here inside this country data source class.