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So now I'm going to paste in some lines of code here and then I'm going to explain to you what's going



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on here.



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So as you can see here these are the lines of code that I pasted here and now I'm going to try to explain



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to you what's going on here.



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Exactly.



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So now let's actually look at our Meffert here.



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So the access modifier of arms if it is private the return type of RMF it is void.



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And as you can see the name of RMF it is show next animal right.



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So the job of the Smurfette is to actually show the quiz actually question the picture of the animal



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and the quiz questions are actually the guest buttons and then we can actually see the question and



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then we can answer the question right.



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So that's the only job of this method.



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So now let's actually go inside the curly braces of the Smurfette And let's see what's going on here.



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So in line number three hundred twenty nine as you can see here we have actually a variable which is



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of type string.



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Right.



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So the name of this variable is the next animal image name.



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Right.



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So this variable is going to hold the actually the name of the animal image that you're going to show



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it to the user.



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So if it's an assignment operator here and then I actually first released animals names quiz list so



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this list is actually supposed to actually hold the images.



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OK.



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The animal images that you're going to have inside our quiz.



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So animal names quiz list dot remove.



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Index 0.



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So this means that it's going to actually remove the value that is inside of the index zero of this



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list.



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Animals names quiz list and then we're going to actually assign that removed value to this next animal.



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Image Name.



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So now we actually moved the first value that you have inside our least.



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OK so this list is going to hold the animal image names that you're going to show to the to.



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Right.



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So you're going to actually first of all remove the first value that is inside of the index 0 and then



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you going to actually assign that remove the value to the next animal image name which is a five string



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right in line number 350 as you can see here are you referred to the name of this variable is going



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to hold the actually the correct answer.



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The correct answer to the first question.



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So let me actually show you the emulator and then and then I'm going to talk about that here.



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So now you can see here our application is running on this emulator.



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And now for example this is actually the first question that is actually shown to us.



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So now as you can see here we're going to actually first of all remove the first value that we have



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inside our quiz and then we're going to assign that value to the next animal image name.



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And then here this variable which is supposed to actually hold the correct answer of every question.



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So as you can see here this is our first question right.



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This is animal one of 10 and this very Abella correct animals answer is actually a variable of type



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three and that is supposed to hold the correct answer of every question that we actually ask from the



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user.



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So as you can see this is the first question here.



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For example this is actually a rabbit right.



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So here we should actually choose the rapid Libet here.



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So the correct animal's answer is going to actually hold this rabbit.



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Right.



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And then first of all because this is actually the question that you're showing to the user first you



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need to actually empted is why you hear the answer to the answer that it takes.



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This is actually an empty value.



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So now this valuable correct answer actually holds this value rabbit.



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And now let's actually look at this line of code here.



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It is like number three hundred and thirty free.



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The question numbered.



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So he asks the question number is this takes here.



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This is animal 1 for example of 10.



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So this is that he asks the question number that said text.



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And then I called the Smurfette here to get the strength.



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And if I actually hold the comments on my keyboard if you are using a Windows machine use actually to



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hold the controls on your keyboard and then click on this three inch My here as you can see we actually



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get this method from the fragment of a file as he can hear from the fragments class.



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So Nalut me actually close this fragment of a file here.



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So it gets strange.



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And now as can see here this method here actually accepts free arguments.



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The first argument is the actually the string value is this resource value so all that string that question



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underlined text.



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So anality actually go inside is strings that exemplified all I can actually hold are the comment on



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my keyboard.



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And again if you are using a Windows machine just hold the control on your keyboard and this rally you



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hear question underlying text.



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And now as you can see here you can actually see this value here inside these strings that exemplified.



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And this is actually a stunning resource question underlined text and this rather is this I hold this



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value.



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This is animal so percent want dollar sign the means this is actually the first argument which is of



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type integer.



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And of person two dollar sign the means actually this is the second argument that actually is an integer



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value.



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So let me ask you to go inside this main activity fragment of a file.



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So as you can see here for the first argument right for the first argument which is this value here.



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Number of right answers plus 1.



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So initially when we actually start our quiz application the value of this number of right answers value



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is actually zero right.



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Initially the value of this number of answers variable is zero because we just started our application



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here and now we want to actually say that number of answers plus 1 means that this is actually given



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here for example.



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This is the number of answers here is 0 0 plus 1 is 1.



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So here it's going to actually put this value here.



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This is animal 1 right.



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And then as you can see here number of animals included inquiries.



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So this is the number 10 here.



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So here as you can see we're going to have 10 questions right.



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10 animal images here so that you use that can actually get the name of these animals.



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So that's the purpose of these of these two lines of code here.



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As you can see and now in line number three hundred and thirty six we have another line of code here.



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And now let's actually look at this line of code here.



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We have actually a string value but then name of my string about eleven is animal type.



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I put an assignment operator here and then as you can see here next animal image name right.



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Next animal image name that substrate.



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And as you can see here this method substring is going to actually just separate are symbols.



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So for example here next animal image name that substory is going to give us a substring of the set



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of a string value that you pass to this method.



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So this will let me actually just show you these arguments of this Moffit next.



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And in one image name that substring.



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And now as you can see this if it accepts two arguments the first one is actually an integer.



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And then in this BGN index and the second argument is actually again of type integer and the name is



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an index.



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So here we can actually specify the beginning index and the ending index of of this string value that



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we pass through this method and then we can actually get the remaining starting value.



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So now for example let me just add that it's this line of code here.



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So as you can see here we're actually specifying the beginning index which is actually zero.



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And then if you are specifying the ending index.



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So people I tell you about this piece of code here.



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First let me actually tell you about the purpose of this line of code here as you can see we are actually



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getting that type of the animal which is actually the answer right.



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So now let me show you the emulator as you can see this is the image that you're showing to the user.



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So we should actually put this image to the user and we should actually get this image from the actual



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assets folder.



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Right.



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So when you want to load this image and when we want to show this image to the user first we need to



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actually get the type of the animal that you are actually dealing with.



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So here we are actually leading with our rabbit.



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So that type of this animal is for example a tame animal.



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So now let me show you the structure of the project.



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Just click on view to tool those and then project and now as you can see here inside the structure of



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the project inside these assets folder we have two folders.



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The first one is PAME underline elements and the second folder is void.



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Underline any months and when we want to actually show the image.



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OK so for example when the show and animal method is called We need to actually get the image of the



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animal that we want to show to the user and we need to actually load it here right.



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So first in order to do that in order to actually load that image here we need to first get the type



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of the animal so that we can actually go inside these assets will there and then go inside that specific



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folder paper underline any months or voyde Underland any months and then we can actually get that specific.



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For example image so as you can see here this is actually our tame animal.



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So you can actually go inside these tame Underland animals and then we can actually find this animal



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here.



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But look at this animal name here.



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Look at the name of this image came under like anemones dashed rabbit.



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Right.



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So let's look at this line of code here.



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As you can see here we actually created a thing valuable and the name is animal type.



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So the purpose of this rally is to get the animal type.



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I put an assignment operator here.



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And then you referred to the name of the value.



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Next animal image name.



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Right next animal image name is the value that we actually created.



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Here's in line number three hundred twenty nine right.



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So now next animal image name that Suppes dream.



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So we call this substring method.



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On this next animal image name.



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So that this is going to give us a substring of the string that we call this Mefford on.



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Right.



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So next animal is named that substrate first.



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We are actually specifying the beginning index.



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So the beginning index is actually the first actually the first character of this name.



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So as you can see here the first character of this name is that is the character t.



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Right.



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So it's going to actually start from the beginning index which is actually this value here.



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This index 0 which is this right.



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And now we need to specify the ending index.



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So as you can see here for the second argument here I am specifying the ending index.



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Next animal image name dot index of dash as you can see here.



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It's going to actually look at this name here and it's going to actually find the stash here.



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As you can see so the beginning index is T and the ending index is this is the stash here right.



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So this method here is this substring Meffert is going to actually give us.



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There actually is string value that starts with T and ends with this end in each index which is actually



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the stash character but not including this character.



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So this is just going to actually give us disvalue that starts with T and just ends with this ending



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character but not including this ending character.



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And he says I'm going to ask you to give us this value and then it's going to actually eliminate the



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remaining part which is this rabbit that PAGG.



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So in this way we can actually get this animal type right.



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So now that the animal type is tame under live animals and then it's going to be assigned this videotape



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Underland months to these animal type.



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So let me explain again here what's going on.



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Next animal image name that substring.



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So it's going to give us a substring of this thing value that we pass to this method and here as you



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can see first we are specifying the beginning index.



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So the beginning index is t.



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And here we need to specify the ending index.



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00:12:43,740 --> 00:12:47,830

So next animal image name dot index of dash.



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So the index of that is here and then it's going to give us this this thing value that starts with T



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and ends with dash but not including the character.



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00:12:58,320 --> 00:13:00,480

And then it's going to give us only That's value.



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00:13:00,600 --> 00:13:03,510

And then it's going to actually assign that value to the animal type.



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So in this way we can actually get the type of the animal here.



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00:13:07,950 --> 00:13:11,760

So now the type is animal is actually tape on the line.



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00:13:11,970 --> 00:13:16,170

For example in this case we can see that this is actually a rabbit.



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So that type is tame Underland animals.



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So hopefully that makes sense.



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And now let me actually double click on this tab here in order to make this area vital.



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And now let's actually look at the other lines of code here.