1 00:00:00,330 --> 00:00:04,710 So as you can see here now our application is running on this emulator. 2 00:00:04,740 --> 00:00:12,030 So if I click on these menu button and then the settings and here if I scroll down now I want to actually 3 00:00:12,030 --> 00:00:14,150 choose this one to you. 4 00:00:14,160 --> 00:00:19,380 So I just need to check the checkbox and then unchecked checkbox and then if I actually come back in 5 00:00:19,380 --> 00:00:20,100 here. 6 00:00:20,130 --> 00:00:23,270 Now as you can see nothing happened and this takes you. 7 00:00:23,460 --> 00:00:25,370 So what's the problem here. 8 00:00:25,800 --> 00:00:28,270 Let's see what's the problem this time. 9 00:00:28,590 --> 00:00:34,810 And here as you can see we didn't actually called this method from the andr's your method. 10 00:00:34,920 --> 00:00:39,780 So as you can see here in our main activity class I actually all right at this andr's your method. 11 00:00:40,230 --> 00:00:48,380 And inside this regime if we need to actually call the Smurfette specify the format for text view free 12 00:00:48,560 --> 00:00:48,950 OK. 13 00:00:48,960 --> 00:00:55,530 We need to call this method so that it can actually execute this method of this on you if it is called 14 00:00:56,040 --> 00:00:57,970 in our Android lifecycle OK. 15 00:00:58,200 --> 00:01:01,620 So let's run our project again and see what happens. 16 00:01:01,620 --> 00:01:07,440 So now as you can see our application is running on the simulator and here you are in the unredeemed 17 00:01:07,440 --> 00:01:08,240 state. 18 00:01:08,430 --> 00:01:11,730 In our application and this is the text number for you right. 19 00:01:11,730 --> 00:01:14,800 And as you can see the front of this text view is actually changed. 20 00:01:14,970 --> 00:01:18,080 So if I click on this menu button here settings. 21 00:01:18,210 --> 00:01:24,000 Now as you can see if they actually uncheck this checkbox and check the checkbox here and then click 22 00:01:24,000 --> 00:01:25,370 click on back button here. 23 00:01:25,380 --> 00:01:28,410 Now as you can see the font of this text view is actually changed. 24 00:01:28,530 --> 00:01:35,190 And here again if I click on the menu button settings and if I scroll down here and now if I unchecked 25 00:01:35,190 --> 00:01:39,420 this checkbox and check this checkbox here and then click on back button here. 26 00:01:39,420 --> 00:01:43,460 Now again as you can see the front of this takes you is actually changed. 27 00:01:43,470 --> 00:01:49,050 OK so now I think that's enough for these fonts. 28 00:01:49,170 --> 00:01:52,080 But here I want to actually specify the size of this form. 29 00:01:52,110 --> 00:01:55,390 OK so if I actually just select this one here. 30 00:01:55,410 --> 00:02:00,360 Now I want to actually for example select this here and if I click on Patch button here I want to actually 31 00:02:00,360 --> 00:02:03,480 for example set the size of this one to 50. 32 00:02:03,500 --> 00:02:09,690 OK so what should I do now we need to actually put the logic for our sizes. 33 00:02:09,720 --> 00:02:10,170 OK. 34 00:02:10,290 --> 00:02:15,900 After this the ending curly brace of this Meffert specify the form to four takes you free. 35 00:02:15,920 --> 00:02:21,080 I want to actually pasting some more efforts here inside our main activity class. 36 00:02:21,090 --> 00:02:21,630 OK. 37 00:02:21,840 --> 00:02:28,260 So as you can see here these are lines of code that I actually pasted here inside this main activity 38 00:02:28,260 --> 00:02:29,030 class. 39 00:02:29,070 --> 00:02:30,720 This is actually MFL right. 40 00:02:30,750 --> 00:02:33,750 So the access modifier of this method is public. 41 00:02:33,810 --> 00:02:36,280 The return type of this method is void. 42 00:02:36,300 --> 00:02:38,960 So this means that this method is going to return nothing. 43 00:02:39,330 --> 00:02:43,950 And the name of this method is specify the size for text view 1. 44 00:02:44,040 --> 00:02:44,570 OK. 45 00:02:44,760 --> 00:02:45,740 As you can see here. 46 00:02:45,930 --> 00:02:47,570 So now as you can see this is. 47 00:02:47,730 --> 00:02:51,960 Now we are inside the Smurfette right inside the curly braces of the Smurfette. 48 00:02:51,960 --> 00:02:58,110 And first of all I actually referred to the name of this strange variable that I created inside this 49 00:02:58,110 --> 00:03:01,440 class inside this man with the glass he had as you can see. 50 00:03:01,440 --> 00:03:06,930 This is our main activity class and at the top of this class I created these string variables as you 51 00:03:06,930 --> 00:03:07,670 can see here. 52 00:03:07,830 --> 00:03:12,780 I just declared these these valuables as you can see in line eight I created. 53 00:03:12,780 --> 00:03:18,330 They actually declared this string valuable the data type of this variable is strange and the name of 54 00:03:18,330 --> 00:03:21,360 this where the above is takes you one size. 55 00:03:21,360 --> 00:03:27,960 So this variable is going to hold the size of the text view that you want to actually for example choose 56 00:03:28,290 --> 00:03:29,310 for my text view. 57 00:03:29,340 --> 00:03:36,100 So as you can see here inside these preferences underline file that examine as you can see for example. 58 00:03:36,600 --> 00:03:38,580 Let me actually close this a preview here. 59 00:03:38,760 --> 00:03:44,260 For example as you can see here we have these list preference here for every preference category. 60 00:03:44,310 --> 00:03:44,760 OK. 61 00:03:44,850 --> 00:03:47,440 We have this list of preference inside that. 62 00:03:47,480 --> 00:03:52,200 So this prevents category as you can see we have this list proofer hands. 63 00:03:52,710 --> 00:03:55,470 And as you can see here we have Titel. 64 00:03:55,500 --> 00:03:58,510 And these are the entries and entry values. 65 00:03:58,620 --> 00:04:02,110 And as you can see here these values are actually strained values. 66 00:04:02,160 --> 00:04:06,750 Remember font size and the font size values are actually string values. 67 00:04:06,750 --> 00:04:13,280 So inside these things that example here as you can see I have these rays of string values. 68 00:04:13,440 --> 00:04:17,780 So we need to actually hold these values as a string value. 69 00:04:17,790 --> 00:04:23,910 So that's why at inside this mean I computed a double file inside this main activity class I actually 70 00:04:23,910 --> 00:04:30,780 declared these three variables in order to hold those values the values of the textbooks for example 71 00:04:30,840 --> 00:04:32,340 for the text you want size. 72 00:04:32,550 --> 00:04:40,510 I want you to hold those values that these values for example 25 40 45 50 55 60 65 and 70. 73 00:04:40,650 --> 00:04:41,360 OK. 74 00:04:41,640 --> 00:04:44,670 So that's what I actually did declare these variables. 75 00:04:44,670 --> 00:04:48,920 So now let's go inside our Mefford specify the size of four text view one. 76 00:04:48,930 --> 00:04:50,300 So this is RMF right. 77 00:04:50,310 --> 00:04:54,530 So are you referred to the name of that valuable assignment operator. 78 00:04:54,780 --> 00:04:57,570 So here this is our shared preferences object. 79 00:04:57,570 --> 00:05:01,460 So this object actually holds all the data that we actually see. 80 00:05:01,850 --> 00:05:04,370 And now we can actually retrieve those data. 81 00:05:04,370 --> 00:05:08,880 So remember when we actually created these preferences Underland follow the example. 82 00:05:09,020 --> 00:05:13,070 You are actually saving some data to our application. 83 00:05:13,210 --> 00:05:18,770 OK so this preference activity that I will find here we are adding that preferences to our application 84 00:05:18,830 --> 00:05:23,010 at preferences from resource are that SML. 85 00:05:23,010 --> 00:05:28,820 So remember inside a directory called exemple as you can see here we have these preferences on the loan 86 00:05:29,030 --> 00:05:31,380 file that XML here as you can see. 87 00:05:31,550 --> 00:05:32,030 OK. 88 00:05:32,180 --> 00:05:35,240 So we have this information in our application. 89 00:05:35,330 --> 00:05:40,080 Now inside the Smain I think declasse we just we just need to get those informations right. 90 00:05:40,190 --> 00:05:43,310 So shared preferences that get strange. 91 00:05:43,310 --> 00:05:45,330 So now you want to get a string value right. 92 00:05:45,500 --> 00:05:47,420 Font size text 1. 93 00:05:47,510 --> 00:05:48,830 So this is actually right. 94 00:05:48,830 --> 00:05:52,590 So let's go inside these preferences underline find that example here. 95 00:05:52,760 --> 00:05:59,750 As you can see here for for example for the first preference category here takes a number of settings 96 00:05:59,750 --> 00:06:00,260 right. 97 00:06:00,260 --> 00:06:02,080 We have a list of friends here. 98 00:06:02,170 --> 00:06:08,300 OK this is a list proof France that is inside of these specific proofer in this category and its title 99 00:06:08,300 --> 00:06:10,190 is text number 1 settings. 100 00:06:10,190 --> 00:06:11,190 So this is the settings. 101 00:06:11,210 --> 00:06:13,220 These are the settings of the text number one. 102 00:06:13,280 --> 00:06:17,430 And now we can actually specify the text size of our text view. 103 00:06:17,450 --> 00:06:17,930 OK. 104 00:06:18,080 --> 00:06:22,550 So lispro France and the key is font size text 1. 105 00:06:22,750 --> 00:06:23,780 OK. 106 00:06:23,810 --> 00:06:29,310 And these are the values these are the values for this list proofer and specifies the size of your phone 107 00:06:29,370 --> 00:06:34,430 for text you want choose one of the sizes and other values font sizes font size values and the default 108 00:06:34,430 --> 00:06:36,440 value is for example Number 10 right. 109 00:06:36,440 --> 00:06:38,810 So as you can see here this is the key. 110 00:06:39,050 --> 00:06:43,600 So Vinita refer to this key in order to access this list preference. 111 00:06:43,610 --> 00:06:52,190 So inside this main activity class I the same team shared preferences that get streamed fault size takes 112 00:06:52,270 --> 00:06:52,780 on. 113 00:06:52,790 --> 00:06:56,680 So now actual access to the list friends the radio buttons. 114 00:06:56,750 --> 00:06:57,480 OK. 115 00:06:58,010 --> 00:07:00,160 And this is the default value number 20. 116 00:07:00,170 --> 00:07:06,190 This is the default value that is going to be chosen for our for example text size. 117 00:07:06,200 --> 00:07:07,070 Right. 118 00:07:07,070 --> 00:07:09,290 We need to put a default value here. 119 00:07:09,560 --> 00:07:14,570 And as you can see here in line here in line one hundred and sixty three I just need to refer to the 120 00:07:14,570 --> 00:07:18,440 name of Arctic's a number of anti-X the text number one object. 121 00:07:18,440 --> 00:07:19,020 OK. 122 00:07:19,270 --> 00:07:21,310 Data set text size. 123 00:07:21,440 --> 00:07:26,190 Here I am actually specifying the size of our takes you right said text size. 124 00:07:26,210 --> 00:07:31,100 This is a Meffert that actually determines what it's going to be the size of our text view. 125 00:07:31,100 --> 00:07:34,840 So the takes number one that takes that said text size. 126 00:07:34,970 --> 00:07:41,890 So because you are actually getting these values as you can see here these numbers as a string value 127 00:07:41,900 --> 00:07:49,410 inside an array as you can see here we need to actually convert that values to a float value. 128 00:07:49,670 --> 00:07:54,310 So we have to we need to actually refer to the name of the floor class. 129 00:07:54,410 --> 00:07:56,930 So float capital F this is very important. 130 00:07:56,930 --> 00:08:01,060 This is actually a class right float that parse float. 131 00:08:01,070 --> 00:08:07,370 So this this is actually the static method inside this Floras class and it's going to actually convert 132 00:08:07,960 --> 00:08:11,230 a value that is of types to a value of type float. 133 00:08:11,270 --> 00:08:11,800 OK. 134 00:08:11,960 --> 00:08:13,930 Takes you want size. 135 00:08:14,330 --> 00:08:14,840 OK. 136 00:08:14,840 --> 00:08:19,170 So in this way we can actually specify the size of our Takes view. 137 00:08:19,490 --> 00:08:25,340 So now inside this and resume effort that we actually created here be overrated here. 138 00:08:25,450 --> 00:08:31,430 I just need to refresh the name of that pivot specify this size for text view 1. 139 00:08:31,670 --> 00:08:34,910 So now let's run our project and see what happens. 140 00:08:34,910 --> 00:08:38,660 So now as you can see the size of our takes view changed. 141 00:08:38,660 --> 00:08:42,350 So as you can see here this is our first text view right. 142 00:08:42,410 --> 00:08:47,660 So if I click on this manual button and then settings and here as you can see I have this option here 143 00:08:47,660 --> 00:08:51,280 to specify the size of your phone's for text view one right. 144 00:08:51,290 --> 00:08:56,830 So I just need to click on it and as you can see here I can actually choose one of these sizes. 145 00:08:56,840 --> 00:08:58,530 For example 70. 146 00:08:59,170 --> 00:09:05,060 And now let's actually click on dispatch button here and now the resume if it is called and the size 147 00:09:05,120 --> 00:09:07,410 of this text is actually changed. 148 00:09:07,780 --> 00:09:14,640 OK so now let's actually add the other efforts for the other text to use for others takes use here. 149 00:09:14,650 --> 00:09:21,180 OK so now here after the end in calibrates of this Meffert space specified the size for text you want 150 00:09:21,540 --> 00:09:24,120 I want I should add one one one more method here. 151 00:09:24,190 --> 00:09:27,590 So as you can see here this is the Meffert that I actually pasted here. 152 00:09:27,730 --> 00:09:31,080 And as you can see here the access modifier of this method is public. 153 00:09:31,210 --> 00:09:37,030 The return type of this if it is void and the name of this method is specified the size for text. 154 00:09:37,030 --> 00:09:38,330 Butu right. 155 00:09:38,590 --> 00:09:41,720 So now I am actually inside the Smurfit. 156 00:09:41,800 --> 00:09:48,000 First of all I referred to the name of this variable that I actually declared inside the main activity 157 00:09:48,010 --> 00:09:48,340 class. 158 00:09:48,340 --> 00:09:49,620 This is already about right. 159 00:09:49,660 --> 00:09:52,120 Strange takes two takes you to size. 160 00:09:52,150 --> 00:09:58,270 So this variable is going to hold these these string values these numbers that are actually given to 161 00:09:58,270 --> 00:10:01,210 us as a string value as you can see here string array. 162 00:10:01,210 --> 00:10:02,100 Right. 163 00:10:02,170 --> 00:10:09,040 So inside this main activity class as you can see here and inside of our Meffert specify the size photosphere 164 00:10:09,040 --> 00:10:14,680 to I actually referred to the name of that idea of an assignment operator. 165 00:10:14,800 --> 00:10:20,770 Again I refer to the name of this object Scheldt preferences in order to get the values inside our preferences 166 00:10:20,770 --> 00:10:24,190 on the follow the example that get strained. 167 00:10:24,310 --> 00:10:25,180 So this is the key. 168 00:10:25,180 --> 00:10:27,000 The first argument is going to be the key. 169 00:10:27,260 --> 00:10:27,660 OK. 170 00:10:27,790 --> 00:10:30,070 Font size takes two. 171 00:10:30,490 --> 00:10:34,720 So this key is inside these preferences underline underlined that examine and as you can see here we 172 00:10:34,720 --> 00:10:38,990 have another approver in this category as you can see text number two settings. 173 00:10:39,250 --> 00:10:43,150 And inside this preference Katic what we have this list preference. 174 00:10:43,150 --> 00:10:44,170 Right. 175 00:10:44,170 --> 00:10:46,910 And the key is font size takes two. 176 00:10:47,050 --> 00:10:47,650 Right. 177 00:10:47,650 --> 00:10:54,100 So if you need to actually refer to the name of this key to this key in order to access these values 178 00:10:54,100 --> 00:10:55,680 the font size is values. 179 00:10:55,690 --> 00:11:02,380 So inside this main activity class and inside the Smurfette I just referred to this key font size takes 180 00:11:02,390 --> 00:11:04,380 two and this is going to be a default value. 181 00:11:04,380 --> 00:11:05,780 For example number 20. 182 00:11:05,980 --> 00:11:06,750 OK. 183 00:11:07,090 --> 00:11:11,770 It doesn't really matter what value you put here because at the end you will naturally choose a font 184 00:11:11,770 --> 00:11:13,300 for your text view. 185 00:11:13,300 --> 00:11:19,820 Right because those values are actually inside some radio buttons. 186 00:11:19,840 --> 00:11:22,620 We have a list list of radio buttons. 187 00:11:22,630 --> 00:11:31,290 OK so we need to choose one of them and here as you can see in line 172 as you can see here I referred 188 00:11:31,510 --> 00:11:34,420 to the name of this to the text number two. 189 00:11:34,560 --> 00:11:35,140 Right. 190 00:11:35,140 --> 00:11:37,650 We have these text in our class right. 191 00:11:37,760 --> 00:11:40,270 TXI the text number to set text size. 192 00:11:40,300 --> 00:11:43,730 So here I want to set the text size of our text view. 193 00:11:43,930 --> 00:11:51,070 So again because we received these values those values of the text sizes as a string value we need to 194 00:11:51,070 --> 00:11:57,730 actually convert those values to a float value in order to assign those values to our to take size of 195 00:11:57,730 --> 00:11:58,240 our take. 196 00:11:58,270 --> 00:11:59,490 DXi takes number two. 197 00:11:59,660 --> 00:12:02,560 So float that parse float. 198 00:12:02,560 --> 00:12:07,060 And we need to put the string value text view to size as you can see here. 199 00:12:07,060 --> 00:12:10,940 So now let's actually run our project and see what happens. 200 00:12:11,080 --> 00:12:17,320 So now as you can see our application is running on this emulator here and now and when I truly click 201 00:12:17,320 --> 00:12:22,600 on this menu bottom settings and then I'm going to change the settings of the text number to say things 202 00:12:22,600 --> 00:12:23,580 right here. 203 00:12:23,590 --> 00:12:27,700 Here we are inside these preference Cretic of these text number two settings. 204 00:12:27,700 --> 00:12:28,870 This is the title. 205 00:12:29,110 --> 00:12:37,540 And here I have this option again specify the size of your fonts for text butu and here I can introduce 206 00:12:37,570 --> 00:12:45,370 for example select this 60 here and if I come back here back in here now as you can see the effects 207 00:12:45,460 --> 00:12:48,040 are not actually happening here. 208 00:12:48,040 --> 00:12:48,720 Why. 209 00:12:48,910 --> 00:12:57,050 Because inside this andr's your Mefford we didn't call that Meffert we didn't call these specify the 210 00:12:57,070 --> 00:13:04,420 size for text view to specify the size for text butu we need to call this Meffert insight is Arzu method 211 00:13:04,840 --> 00:13:11,440 in order to change changes to take effect in our main exemplified here in our main activity. 212 00:13:11,830 --> 00:13:15,180 Otherwise we cannot actually see those changes. 213 00:13:15,250 --> 00:13:21,100 We need to call that movement on this resume effect which is a method that is part of the Android lifecycle. 214 00:13:21,140 --> 00:13:21,900 OK. 215 00:13:21,940 --> 00:13:26,920 So so that these are changes that are inside of this method is going to happen. 216 00:13:27,010 --> 00:13:27,930 Right. 217 00:13:27,940 --> 00:13:29,570 So let's run our project again.