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



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to you what's going on here.



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Exactly.



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So here as you can see this is actually our method and the access modifier of this method is public.



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The return type of this method is Voyt and the name of this method is modified cuius want.



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Right.



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And this method actually accepts an argument of type shared preferences and the name of this argument



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is shared preferences.



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Right.



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So what's the purpose of this method.



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This method is actually responsible for modifying the phones of the texts of the buttons of the guest



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buttons.



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So let me show you the emulator here.



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As you can see here if you just go inside these settings activity.



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Now as you can see we have this up this item here font for keys.



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Choose one of these fonts for quiz.



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And if I selected here now I can actually select one of these fonts for the text of the buttons that



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we have inside the Cooley's.



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So for example I can choose this one here and then I can actually click on back button here and now



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as you can see here the front of the button is now changed.



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Or I can actually select another font for example.



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Fauntleroy Blough I can select this one so as you can see here this is actually our radio group that



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contains these radio buttons right.



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This is actually the least preference.



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So let's actually select Fauntleroy Brown and then I can click on batch button here as you can see here.



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Now the font is changed.



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Right.



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



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Let's go inside the curly braces of the Smurfit And let's see what's going on here.



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First of all in line number four hundred nineteen as you can see we have actually a variable of types



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3.



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Right.



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And the name of our valuable is format string value and then I put an assignment operator here and then



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you referred to the name of this argument shared preferences DOT gets strange right.



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Shared preferences that get strange.



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And for the first argument we need to pass the key.



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So the key is main activity that cuius for that.



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So let's actually go inside this main activity that of a file here.



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Let's go inside this class as you can see in line number 19.



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As you can see I created this constant here right which is after upstreams and the name of this constant



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is cuius underlined font slight assignment operator and this constant actually holds this key settings



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Underland keys underline font.



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And if I were actually going inside these quiz underline preferences that XML file as you can see we



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have actually this list three friends here.



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Right.



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So the entries is actually false at sign at a slash fonts.



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So let's actually hold the comments on our keyboard and if you are using a Windows machine just hold



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the control on your keyboard and then click on this right here and now as you can see here inside these



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areas that examen file we have this story out here.



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Right.



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So these are the entries.



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So these values are the values that are going to show to the user.



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So we have free items as you can see here.



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Let me actually show you the emulator as you can see.



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Now you can see that if I actually go inside the settings activity and then if I click on this front



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for for quiz item here as you can see these are the values that you are showing to the user the chunk



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for the Fauntleroy around the vonder bar them all right.



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So these are the values that you are going to show to the user.



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And now let's actually go back into our quiz the underline preferences that exemplified as you can see



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we have three values.



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So I'd say add a slash false underline values.



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So let's actually hold the here on our keyboard.



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And again if you are using a Windows machine.



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Just hold the control on your keyboard and then click on this value here.



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So we have this string arrow here light front underline values and we have these items here.



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So these are the actual values that you are going to work with from our job coats.



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These are the actual values that we are going to interact with from our job of course right chunk Fyffe



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that are T.F. Fauntleroy Blount the tity f wunderbar space.



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OTFE.



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So these are the name of the phones that we have inside our project.



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So now if I show you the structure of the project and if we actually to go inside these assets for that



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you can see that inside this phone directory inside this phone's folder we have these phones turn five



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that are T.F. Fauntleroy Brown the TGF wunderbar space them all that.



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All right so now let's actually go inside our quiz Underland preferences and file.



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And here you can see that the key for the key attribute I assigned this value settings underline quiz



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on the LEnfant And inside this main activity of a file you can see that recreated is constant and this



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constant actually holds the key here settings underline keys underline font.



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So whenever you want to actually first to is key I can just refer to this constant to the name of this



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constant.



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And then I can actually access this value right.



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So now let's actually go back inside our quiz underline preferences that is in my file.



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And that for the title form for Greece for the summary choose one of these phones for quiz and for the



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persistent attribute.



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Again I assigned the value of truth and the default value is actually at sidestream.



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Slash default underline front.



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So let's hold the commentary on a keyboard.



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And if you are using a Windows machine you just hold the control on your keyboard and then click on



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disvalue here and now as you can see here for the default font string source as you can see we have



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to hunt Fyffe that or T.F..



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So if the user doesn't want to actually change the font of the text of the buttons the default font



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is going to be this one chunk.



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5. What here.



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Right.



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So let's go back into our quiz Underland preferences that exemplified.



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And this is actually the least preference that you're going to interact with.



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So inside display an activity that a file we created this key here and now as you can see here we have



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also declared these forests these typeface typefaces valuable as you can see here the data type of these



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variables.



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It is actually the typeface right.



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So these variables can hold a difference that we have inside our project and inside inside the uncreate



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as you can see here are actually initialized these valuables.



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Channel 5 as you can see here and Fauntleroy Fauntleroy Brown and wonder about them all right.



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And now let's actually go inside our main activity BRAITMAN that of a file.



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And here you can see that we actually called this method shell inferences that gets trimmed and the



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plastic key.



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And for the default value you pass the value not right.



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So now we can actually get the specific font from this from the shared preferences by actually passing



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this key main activity that quizz underline font and you are actually assigning that value to this want



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something valuable valuable right.



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So now I actually created a switch statement in order to switch between the values of this fund string



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value as you can see here.



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So analysis actually going inside the curly braces of this front of this switch statement.



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And let's see what's going on here.



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Right.



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So here as you can see there the first look at this first case statement here.



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So we have case Chanoch five that here.



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So this means that if the value that is assigned to this Funston value is 205 or T.F. as you can see



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here we are actually switching between the values of these fonts thing you so case if the value of this



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fonts thing value is Chhun five that OTFE then it's going to actually execute this for Lapeer for linearly



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out row.



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And it's going to actually either right over the values of these IRA rules of spottiness in animal cuius



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as you can see here.



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Right.



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And then we have another for loop here inside this for a loop.



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So for Cullom zero.



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So let's look at the emulator here and now let's actually go back into our main activity as you can



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see here we have these rules here right.



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So if you want to either right over these rules here that we have in say the squeeze.



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So if we have two rows here.



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So we are actually iterating over the values of these three rows of spottiness in animalcules.



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And here we want to actually go inside these rows and we want to actually get the buttons.



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So for in column.



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So initially we assigned about zero to this column and we actually created a condition here that says



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until the value of this column variable is less than the value of the child count of this row.



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As you can see here.



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So here we have linearly right.



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So we can actually get the child count.



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And here I said that after each execution after each execution of this fall here is going to actually



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increment the value of this column by the way you Yvonne.



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And then it's going to go inside the curly braces of this for a loop.



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And now it's going to execute these two lines of code here first.



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It is actually saying that a button button assignment operator so button we're actually testing this



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object we button update the row that get child X column right.



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So we are actually getting that button that we have inside this first throw.



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So it's going to start to be the first throw.



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Right.



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And it's going to actually look at the column 0.



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Right.



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So the column 0 is this one the Spartan peacock.



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Right.



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And then as you can see here it's going to actually go inside this for a loop.



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First as you can see here it's going to get this spot in.



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Right.



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And then it's going to call the sniff at on this button button that set type face.



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Main activity that taunt that actually chunk five right so as you can see we have actually a typo.



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So let's actually go back inside our main activity out of a file.



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And now this actually changed its name to Chalk Talk five.



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And let's actually change this name also to hunt 5.



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As you can see here.



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So now let's go back into our main activity fragment that of our fight and here let's also changed his



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name to chant five and now the error is gone.



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Right.



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So now let's actually start from this case statement here.



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Again I want to actually explain to you what's going on here.



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Again.