1

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So now let's actually look at these lines of code here in line number two hundred and twenty nine as



2

00:00:06,090 --> 00:00:07,100

you can see here.



3

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I actually referred to the name of this variable number of right answers.



4

00:00:12,120 --> 00:00:13,780

Assignment operator zero.



5

00:00:14,040 --> 00:00:17,840

So when I want to actually reset our quiz application.



6

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I want to actually assign the value zero for the number of right answers because in that case we are



7

00:00:23,250 --> 00:00:26,640

not going to have right answers because our application.



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Actually our quiz is actually reset.



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So again we have this number of all guesses valuable.



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00:00:33,660 --> 00:00:39,300

And again we assign the values zero to the number of all guesses variable because again we are actually



11

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resetting our cuius application.



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So we want to assign the value zero to these variables.



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And if you actually scroll to the top here as you can see if you actually declare these two variables



14

00:00:50,460 --> 00:00:51,130

here.



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00:00:51,130 --> 00:00:55,400

Number 45 I declare this variable here a number of all guesses.



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And we also declare this valuable number of right answers.



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So this number of all this is is going to actually hold or the number of times that the user actually



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guessed there actually questions.



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And this number of answers is going to actually hold the number of times that the use guessed at the



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right animal.



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OK.



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Just at the right.



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Just the name of the animal right.



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So hopefully that makes sense.



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And now the texturally scroll down.



26

00:01:21,210 --> 00:01:27,720

And let's actually go inside this actually inside this recent animal quis Smurfette.



27

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And here we have these animals names cuius list.



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So we have this Actually we have this arii But this is actually a list that can actually accept an array.



29

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And again lists are actually interfaces in Java and we use the least because we want to actually use



30

00:01:47,580 --> 00:01:50,670

the extra features that come with the list interface.



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So now if we actually scroll to the top here as you can see we actually declared these animals names



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quiz list here as you can see.



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00:02:02,070 --> 00:02:09,960

So this variable is going to actually hold the number of actually the animals that we have inside our



34

00:02:09,960 --> 00:02:10,520

quiz.



35

00:02:10,650 --> 00:02:17,010

So now if I show you the emulator here as you can see let me actually show you the queries as you can



36

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see.



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We have we are going to have 10 questions right.



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So this means that we are going to have 10 randomly selected animal images from our project.



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And then it's going to actually show us those images to us.



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00:02:30,870 --> 00:02:37,220

So if we have two variables to list actually the first one is all animals names list.



41

00:02:37,260 --> 00:02:40,550

And the second one is animals names quiz list.



42

00:02:40,590 --> 00:02:42,300

So this all animals names list.



43

00:02:42,300 --> 00:02:47,670

So for example let me show you the emulator if I actually go inside these settings activity and then



44

00:02:47,700 --> 00:02:54,120

here anemones as you can see if they use that actually specifies that he or she maybe wants to for example



45

00:02:54,780 --> 00:02:57,680

only have paint animals sight our quiz.



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00:02:57,840 --> 00:03:04,800

Then in that case if they use that actually selects this tame animals here then the animal images inside



47

00:03:04,800 --> 00:03:09,490

the inside the actually came Underland animals fall there.



48

00:03:09,490 --> 00:03:14,110

So now let me show you the structure of the project inside it is tame Underland animals folder.



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These images are going to be actually assigned to these and all animals names list.



50

00:03:18,600 --> 00:03:19,210

OK.



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00:03:19,590 --> 00:03:25,430

Or if they use that actually to select both of these checkboxes here this means that the user wants



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to have all the images that are inside of these folders.



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Wild animals and tame animals.



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00:03:32,130 --> 00:03:38,380

So in that case that means that all these images are going to be assigned to these other animals names.



55

00:03:38,580 --> 00:03:46,220

So I showed you here inside these actually let me show you this method here.



56

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We said animal Chris as you can see inside is for a loop.



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He actually said that we want to add all the images all the image paths that we have inside our animal



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types inquiries.



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00:03:57,990 --> 00:04:02,080

So here you are specifying the animal types that we want to put inside our quiz.



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00:04:02,100 --> 00:04:02,880

Right.



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00:04:02,880 --> 00:04:07,800

So in that case it's going to actually assign all the image paths to art at all.



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Animals are actually all animals names list so that all animals names these are going to is going to



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actually hold those image paths.



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But we have these animals names these.



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So this malleable this list is going to hold only the selected only randomly selected images that we



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have inside our quiz.



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So for example as you can see we have 10 only 10 questions right.



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We have lots of images but we are going to have only 10 questions and this means that if you want to



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actually use these images if you want to only have 10 questions in site Ahlquist we need to actually



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randomly select our 10 images from these folders and then we can actually put put that here.



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So these animals names quiz list right Ebell this list is going to hold that randomly that images those



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randomly selected images.



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So hopefully that makes sense.



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And now let me I actually double click on this tab here main activity Fleischman that Java tab and now



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let's actually scroll down here and again let's actually go inside this reset animalcules Mefford.



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00:05:16,090 --> 00:05:21,880

So as you can see here because we want to actually do reset our animal quiz we need to actually clear



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all the values all the images that are inside of these animals names.



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Is this here first.



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And then here as you can see in line number two hundred and fifty three I created over the table which



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is of type integer and the name is counter.



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And then initially I assigned to devalue number one to this counter in line number 254 as you can see



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here we created another variable and the name of this variable is number of available animals.



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OK.



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Number of available animals.



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And this means that this variable here is going to actually hold all the number of animals that are



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actually available to to the queen.



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00:06:01,900 --> 00:06:04,660

So for example Now let me show you the emulator.



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And now I want to actually go inside the settings activity and now I choose these animals.



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So here I can actually specify that what types of animals are going to be inside always.



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So now it would only select only tame animals.



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If we only check this checkbox here.



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This means that we have only the animals that are inside of these tame Underland animals folder.



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So in other words only the images that are inside of this tape Underland animals for there are going



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to be available to us and this valuable as you can see here a number of available animals this valuable



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is going to hold the number of images that can be actually used in insight or Kiwis or here if we actually



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also check the search box here.



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This means that though the number of animals that are going to be available are actually always going



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to be also these animals here that are inside of this world under like animals so hopefully that makes



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00:07:01,120 --> 00:07:04,490

sense so in that case all animals names list.



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So about this list actually holds the animals that you specified and then adding on elements names.



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These thoughts cise.



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So here is going to actually give us the number of animals the size of this list and then we can actually



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assign that size to the number of available animals valuable.



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So hopefully that makes sense.



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And here as you can see we have a void.



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Right.



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So let's look at this while up here and let's see what's going on here.



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Here if you say wild counter so as you can see here we created these counter-rally label in line number



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two hundred and fifty three vial counter is less than or equal to number of animals included increase.



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So now if I actually scroll to the top here as you can see inside this class if you actually created



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this constant as you can see here a number of animals included increase.



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And then I assigned the value number 10 to this constant And this means that we're going to have 10



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questions 10 animals in sight always.



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00:08:05,950 --> 00:08:11,440

So as you can see here if I click on dispatch button here as you can see it says this is animal of one



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of 10.



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So this means that you're going to have 10 questions 10 and months.



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Right.



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00:08:15,640 --> 00:08:22,120

So let me scroll down here and let's actually again go inside our my favorite is that animal quis.



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So here as you can see let me show you the loop here.



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As you can see so until vide the value of this counter which is now one is less than or equal to a number



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00:08:32,720 --> 00:08:37,910

of animals including the inquiries which is 10 then it's going to actually go inside the curly braces



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of this for a while loop and then it's going to actually execute the lines of code that are inside of



123

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the white tube here.



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First as you can see here we actually created vit where it's going to recreate of the of type integer



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and the name of this variable is a random index.



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Right.



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Assignment operator and then I refer to the name of this variable secure random number.



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So now if we actually scroll to the top of the file here inside our main activity fragment class as



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you can see here in line number 48 by actually declared this variable which is of type secure random



130

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and this variable name is secure random number.



131

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So the job of this variable is actually to hold a random number or secure random number.



132

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Right.



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That's the only job of this value.



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And then here as you can see inside this main activity for fragment in line number 70 I am actually



135

00:09:28,760 --> 00:09:33,920

initializing this rowdier but your random number assignment operator new secure random number.



136

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So now we have as truly an object of type secure random that can actually hold on a random value right.



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00:09:42,740 --> 00:09:48,470

So let's actually go inside our Richard Quest Meffert And let's see how we can use this secure random



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object.



139

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So now inside this loop here random index assignment operator secure random number.



140

00:09:57,170 --> 00:09:58,060

That's next.



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00:09:58,090 --> 00:10:05,660

And so by calling dismay at the next int as you can see here we can actually get our random integer



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value.



143

00:10:06,950 --> 00:10:11,840

And here it says not are actually assigned number of available any months.



144

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So it's going to give us a value between 0 and the value that we specify here.



145

00:10:17,780 --> 00:10:20,210

Number of available animals.



146

00:10:20,330 --> 00:10:25,660

So the number of available animals is going to be of value that is specified here.



147

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All animals names these sites.



148

00:10:28,310 --> 00:10:31,780

Right so for example let me show you the structure of the project.



149

00:10:31,790 --> 00:10:37,340

So for example inside tame animals for there if we specified that we're going to have only tame animals



150

00:10:37,710 --> 00:10:38,990

in sight always.



151

00:10:39,020 --> 00:10:43,400

Then as you can see here for example it's actually count the number of images that we have here one



152

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two three four five six seven eight 9 10 11 12.



153

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So we have 12 images inside this team Underland animals folder.



154

00:10:58,160 --> 00:11:00,290

So this is going to be 12 for example.



155

00:11:00,320 --> 00:11:01,020

Right.



156

00:11:01,220 --> 00:11:05,450

And now it's going to actually give us our random value secure and the next.



157

00:11:05,450 --> 00:11:11,830

It means that it's going to give us a random value between 0 and 12 right.



158

00:11:11,900 --> 00:11:16,170

And then it's going to be assigned at random value to the standard index.



159

00:11:16,610 --> 00:11:24,290

So now as you can see here in line number 240 as you can see we created another variable which is of



160

00:11:24,290 --> 00:11:27,210

type String animal image name.



161

00:11:27,290 --> 00:11:30,900

This is the name of this valuable assignment operator here.



162

00:11:31,070 --> 00:11:34,110

And I actually further to the name of this list here.



163

00:11:34,130 --> 00:11:41,090

All animals names the list dot get a random index right.



164

00:11:41,120 --> 00:11:46,660

So here at this piece of code here it's going to actually give us our random value or random image path



165

00:11:46,700 --> 00:11:47,360

as you can see here.



166

00:11:47,380 --> 00:11:49,550

Let me show you the structure of the project.



167

00:11:49,550 --> 00:11:55,280

For example we have specified that we want to only have tame animals inside our project as you can see



168

00:11:55,280 --> 00:11:55,630

here.



169

00:11:55,670 --> 00:11:57,110

All animals names these.



170

00:11:57,320 --> 00:12:03,530

And now actually contains these images right dot get a random index so you can actually randomly select



171

00:12:03,530 --> 00:12:04,400

one of these images.



172

00:12:04,400 --> 00:12:09,020

For example this flappy bird and then it's going to actually assign that value to this animal.



173

00:12:09,020 --> 00:12:11,740

Image Name which is actually of type string.



174

00:12:11,740 --> 00:12:12,530

Right.



175

00:12:12,650 --> 00:12:17,540

And now as you can see here we have actually an if statement.



176

00:12:18,040 --> 00:12:25,370

So if I need molls names quiz list that contains So as you can see here I put an exclamation mark here.



177

00:12:25,390 --> 00:12:25,920

Right.



178

00:12:25,960 --> 00:12:35,140

So this exclamation marks me here means not if animals names quiz list does not contain animal image



179

00:12:35,140 --> 00:12:37,140

name as you can see here.



180

00:12:37,150 --> 00:12:44,170

So here we have an if statement and this statement here means if animals names cuius least if the animals



181

00:12:44,170 --> 00:12:49,900

that are going to be inside our quits as you can see here these animals names quizz this this list is



182

00:12:49,900 --> 00:12:55,570

going to actually hold our randomly selected images that we have inside our coolies.



183

00:12:55,570 --> 00:12:58,650

So here we are going to have only 10 questions right.



184

00:12:58,690 --> 00:13:06,720

So if this list does not contain as you can see here this exclamation mark here means not if animals



185

00:13:06,940 --> 00:13:12,420

names This list does not contain animal image name as you can see here.



186

00:13:12,670 --> 00:13:20,320

So here we are taking that we are not going to for example add a duplicated image value a duplicated



187

00:13:20,350 --> 00:13:22,680

image to always right.



188

00:13:22,700 --> 00:13:27,280

We're going to have every time that we actually answer a question the next question is going to be a



189

00:13:27,280 --> 00:13:29,370

different question or different animal.



190

00:13:29,380 --> 00:13:37,660

So here we are saying that if it if the image that is actually inside our animals names because this



191

00:13:37,900 --> 00:13:40,700

is actually the same as animals.



192

00:13:40,900 --> 00:13:45,370

Image Name here as you can see then it's not going to actually execute this statement.



193

00:13:45,400 --> 00:13:51,670

Here we are thinking that if animals names This list does not contain animal image name.



194

00:13:51,670 --> 00:13:58,840

So if we don't have duplicated our image inside our quiz then it's going to actually add that image



195

00:13:58,840 --> 00:14:04,610

to these animals names quizzes so animals names quislings start at animal image.



196

00:14:04,960 --> 00:14:05,620

Right.



197

00:14:05,920 --> 00:14:08,480

And then it's going to increment the counter by Yvonne.



198

00:14:08,500 --> 00:14:09,100

Right.



199

00:14:09,100 --> 00:14:13,440

So here for example because we're going to have only 10 questions inside our quiz.



200

00:14:13,600 --> 00:14:16,390

So the initial value is 1.



201

00:14:16,510 --> 00:14:19,000

So it can actually increment this counter.



202

00:14:19,330 --> 00:14:22,900

And then until until it reaches to the value for example Number 10.



203

00:14:22,900 --> 00:14:30,670

So here we are checking that until the value account is equal or let Actually it is actually less than



204

00:14:30,730 --> 00:14:33,280

or equal to number of animals included in quiz.



205

00:14:33,460 --> 00:14:37,030

So until it reaches to the number 10 and then it's going as it should is why look.



206

00:14:37,150 --> 00:14:41,080

And when it reaches to the value in number 11 as you can see here it's not going to actually raise it



207

00:14:41,210 --> 00:14:41,890

this way.



208

00:14:42,100 --> 00:14:47,680

And it's going to keep this piece of code here and it's and then it's going to actually show the results



209

00:14:47,680 --> 00:14:48,390

to the user.



210

00:14:49,230 --> 00:14:50,870

So hopefully that makes sense.



211

00:14:50,880 --> 00:14:57,540

And we have also the Smurfette show next animal which we are going to add later but for now I want you



212

00:14:57,540 --> 00:15:03,120

to actually just look at these lines of code here that we put inside this wretched animal cookies and



213

00:15:03,120 --> 00:15:05,570

just figure out what's going on here.



214

00:15:05,640 --> 00:15:06,080

Right.