1 00:00:00,390 --> 00:00:06,540 So now before we add the logic to our main activity the double file here let's actually open our project 2 00:00:06,540 --> 00:00:11,020 structure so we just click on this view tool windows and then click on Project. 3 00:00:11,070 --> 00:00:11,850 Right. 4 00:00:11,850 --> 00:00:14,570 So now this is the structure of our project. 5 00:00:14,580 --> 00:00:21,630 And these are the files and non-sexually click on this app here at the top and then click on file and 6 00:00:21,630 --> 00:00:24,060 here click on project structure. 7 00:00:24,480 --> 00:00:30,930 And now as you can see in this industry Julio's I'm going to actually use the latest AP AIs that are 8 00:00:30,930 --> 00:00:37,810 introduced in the latest job right in the latest version of actually Java programming language. 9 00:00:38,220 --> 00:00:42,510 So now let's as far as you can see we have this sort of compatibility right. 10 00:00:42,510 --> 00:00:47,050 So just click on this here and then choose 1.7 Java 7. 11 00:00:47,460 --> 00:00:50,990 And again choose this one here and choose 1.7. 12 00:00:51,150 --> 00:00:51,800 Right. 13 00:00:51,840 --> 00:00:58,830 So as you can see here for the source composite compatibility I chose 1.7 and for their target compatibility 14 00:00:58,830 --> 00:01:00,940 I chose 1.7 right. 15 00:01:01,240 --> 00:01:07,110 And now let's actually click on OK here and now we should wait a little bit here is going to actually 16 00:01:07,380 --> 00:01:09,400 build the cradle here for us. 17 00:01:09,720 --> 00:01:12,670 And as you can see here everything is done here for us. 18 00:01:12,690 --> 00:01:13,340 Right. 19 00:01:13,500 --> 00:01:19,280 So now let's actually go inside this main activity that double file here and now first of all inside 20 00:01:19,290 --> 00:01:24,330 this main activity class I'm going to paste in some lines of code here and then I'm going to explain 21 00:01:24,330 --> 00:01:26,680 to you what's going on here. 22 00:01:27,060 --> 00:01:31,980 So as you can see here these are two lines of code that are pasted here. 23 00:01:32,190 --> 00:01:38,520 So in line number 12 as you can see we have a constant which is actually public static as you can see 24 00:01:38,520 --> 00:01:41,760 here and the data type is streamed. 25 00:01:41,940 --> 00:01:42,660 So this is fine. 26 00:01:42,670 --> 00:01:48,300 Right this is constant and the name of this constant is guesses as you can see here all the letters 27 00:01:48,330 --> 00:01:53,660 of this name is actually capitalized cases and that I've with an assignment operator here. 28 00:01:53,760 --> 00:01:59,290 And then I assigned this string the value to this constant setting's underline number of guesses. 29 00:01:59,310 --> 00:01:59,950 Right. 30 00:02:00,060 --> 00:02:01,270 So what is its value. 31 00:02:01,440 --> 00:02:05,920 So let's actually go inside this quiz underlying preferences that they simplify. 32 00:02:06,060 --> 00:02:09,860 And now as you can see here at the top we have this list preference right. 33 00:02:09,870 --> 00:02:13,240 We have a radio group that contains radio buttons. 34 00:02:13,470 --> 00:02:19,400 And now as you can see here the key is 13 x underly number of guesses. 35 00:02:19,410 --> 00:02:27,720 So as I told you before we actually use this key in order to interact with this least preference in 36 00:02:27,720 --> 00:02:31,470 order to interact with this radio group that contains radio buttons. 37 00:02:31,530 --> 00:02:38,280 So we must provide a key for our release preference so that later in our job codes we can and we can 38 00:02:38,430 --> 00:02:44,820 actually interact with this list through friends and the key is settings underline number of guesses. 39 00:02:45,000 --> 00:02:49,800 Now if we go back inside this main activity that our file here as you can see this is that keep settings 40 00:02:49,830 --> 00:02:51,220 on the number of cases. 41 00:02:51,240 --> 00:02:56,630 So here I actually created a constant so that whenever I actually referred to this case as constant 42 00:02:56,670 --> 00:02:58,030 I can actually access this value. 43 00:02:58,050 --> 00:02:58,310 OK. 44 00:02:58,320 --> 00:03:03,920 There is no need to write at this value every time I need to actually access this key. 45 00:03:04,020 --> 00:03:10,170 I can't just refer to this case as constant right in line number 13 as you can see here we have another 46 00:03:10,170 --> 00:03:13,010 constant public static final strange. 47 00:03:13,200 --> 00:03:19,820 And this animal underling type assignment operator and again we assigned another key to this constant. 48 00:03:19,920 --> 00:03:23,290 And the key is settings underline and Namath's type. 49 00:03:23,340 --> 00:03:27,360 So if you actually go inside this quiz underline preferences that examen find. 50 00:03:27,400 --> 00:03:35,070 Now you can see that we have this multi-select list preference as you can see here we have these checkboxes. 51 00:03:35,460 --> 00:03:43,020 We have as you can see now you can see that the key is settings on the line and the months type. 52 00:03:43,020 --> 00:03:44,580 So this is that key here. 53 00:03:44,580 --> 00:03:45,420 Right. 54 00:03:45,570 --> 00:03:49,650 So now let's actually go back inside our main activity that of our file here. 55 00:03:50,010 --> 00:03:57,020 And we have also another constant public static final string and the name is quis on the line back in 56 00:03:57,180 --> 00:03:58,280 Underland cutter. 57 00:03:58,470 --> 00:04:03,420 And as you can see here this is the key settings underlined keys underlined by get an underlined color. 58 00:04:03,450 --> 00:04:07,560 So if you actually go inside the school is underlined preferences that examen file. 59 00:04:07,560 --> 00:04:14,230 Now you can see that the key for this list friends here as you can see is this one settings under the 60 00:04:14,240 --> 00:04:17,170 line crease underlined background underlined color. 61 00:04:17,230 --> 00:04:18,160 Right. 62 00:04:18,180 --> 00:04:22,710 So we actually referred to the ski inside our main activity out of a file. 63 00:04:23,040 --> 00:04:28,760 And here we have another constant public static final three in front. 64 00:04:28,860 --> 00:04:35,360 And again we assigned another key to these constant settings on the line quiz underlined font. 65 00:04:35,490 --> 00:04:40,470 And if we actually go inside this quiz underline preferences that is simplified you can see that you 66 00:04:40,470 --> 00:04:41,790 are referring to this key here. 67 00:04:41,790 --> 00:04:42,110 Right. 68 00:04:42,120 --> 00:04:46,810 This is the key settings underline quis underlined font right. 69 00:04:46,980 --> 00:04:51,160 So let's actually go back and say there's an activity in say these entity that have a file here. 70 00:04:51,270 --> 00:04:56,280 And as you can see here we have all these keys here inside this main activity that double file inside 71 00:04:56,280 --> 00:04:57,590 this main activity class. 72 00:04:57,690 --> 00:04:58,330 Right. 73 00:04:58,620 --> 00:05:01,860 So hopefully that since. 74 00:05:01,940 --> 00:05:04,570 Now I want to show you another important thing here. 75 00:05:04,730 --> 00:05:10,270 If you actually have noticed before that our application is going to be an import in portrait mode. 76 00:05:10,370 --> 00:05:11,090 Right. 77 00:05:11,090 --> 00:05:13,370 So let's actually open our project structure. 78 00:05:13,370 --> 00:05:18,560 And as you can see here I just need to double click on this manifests here as you can see here for this 79 00:05:18,560 --> 00:05:20,300 activity here for this main activity. 80 00:05:20,300 --> 00:05:26,780 I want to add another attribute and here I can just type in orientation and here as you can see it says 81 00:05:26,820 --> 00:05:32,750 all screen orientation portraits so choose screen orientation portraits for this activity because our 82 00:05:32,750 --> 00:05:34,510 application is going to be in portrait. 83 00:05:34,640 --> 00:05:35,490 Right. 84 00:05:35,570 --> 00:05:40,900 So let's go back inside the main activity that are filed here and now we need to add other logic's here. 85 00:05:41,090 --> 00:05:43,530 So now I'm going to paste in a line of code here. 86 00:05:43,730 --> 00:05:46,990 And then I'm going to explain to you what's going on here. 87 00:05:47,270 --> 00:05:51,050 So as you can see here this is the line of code that I pasted here. 88 00:05:51,050 --> 00:05:57,770 So here as you can see we have actually a boolean variable and this is private and this is of type Boolean 89 00:05:58,100 --> 00:06:04,360 and the name of this variable is IIS settings changed and in Ife with an assignment operator here. 90 00:06:04,460 --> 00:06:08,600 And initially I assigned the value of false to this variable. 91 00:06:08,810 --> 00:06:14,030 So this variable is going to determine that there are setting's is actually changed or not. 92 00:06:14,030 --> 00:06:19,220 So for example if I show you this emulator here our application is here and now if I you to go inside 93 00:06:19,220 --> 00:06:24,500 the settings now for example if I change the background color to for example blue. 94 00:06:24,590 --> 00:06:28,520 Now as you can see we actually use this idea. 95 00:06:28,550 --> 00:06:32,260 But in order to determine whether the settings are actually be changed or or not. 96 00:06:32,330 --> 00:06:32,850 Right. 97 00:06:32,930 --> 00:06:34,750 So that's the job of this variable. 98 00:06:34,850 --> 00:06:39,900 And I actually click on this page in here as you can see now that by the background and color of the 99 00:06:39,900 --> 00:06:41,560 Queen's application is blue. 100 00:06:41,570 --> 00:06:42,240 Right. 101 00:06:42,620 --> 00:06:44,590 So hopefully that makes sense. 102 00:06:44,900 --> 00:06:51,470 And now as you can see I'm going to pasting some more lines of code here and then I'm going to explain 103 00:06:51,470 --> 00:06:53,620 to you what's going on here. 104 00:06:53,720 --> 00:06:58,350 So as you can see here these are the lines of code that I pasted here. 105 00:06:58,460 --> 00:07:03,950 So each line number 22 we have actually another variable and this is static. 106 00:07:04,040 --> 00:07:04,420 Right. 107 00:07:04,460 --> 00:07:06,780 So this means that this is going to be A-class valuable. 108 00:07:06,860 --> 00:07:11,030 And we can actually use the class name in order to access this variable. 109 00:07:11,030 --> 00:07:14,460 So for example main activity that Chinawhite. 110 00:07:14,690 --> 00:07:18,150 So as you can see here the data type of this variable is typeface. 111 00:07:18,350 --> 00:07:21,290 Right and the name of this variable is chunk of time. 112 00:07:21,410 --> 00:07:26,930 So as you can see here typeface is used in order to actually hold Fornes in our application. 113 00:07:26,930 --> 00:07:31,240 So as you can see we have some fonts here. 114 00:07:31,250 --> 00:07:35,670 For example chunk 5 Fauntleroy Brown and wonder about wonder about space them all. 115 00:07:35,690 --> 00:07:39,080 So these are the fonts that we actually hold inside our application. 116 00:07:39,080 --> 00:07:44,180 So we actually created these valuables here in order to hold these phones in so that application and 117 00:07:44,420 --> 00:07:47,470 we can access these forums whenever we want to. 118 00:07:47,480 --> 00:07:53,960 So static typeface chunk file so this is the name of this valuable we have and other valuable in line 119 00:07:53,960 --> 00:07:59,120 number 23 static typeface Fauntleroy Brown and line number 24. 120 00:07:59,120 --> 00:08:03,550 We have another variable static typeface wonder about them all right. 121 00:08:03,590 --> 00:08:08,690 So now as you can see here initially we didn't cite any values to these variables. 122 00:08:08,780 --> 00:08:11,160 So let's go inside this uncreate method here. 123 00:08:11,360 --> 00:08:13,980 And now let's get you to initialize these rowdier bells. 124 00:08:14,060 --> 00:08:17,430 So as you can see these are the lines of code that I pasted here. 125 00:08:17,430 --> 00:08:19,550 Inside this uncreate Meffert. 126 00:08:19,760 --> 00:08:25,130 So in line I'm at 45 I am actually initializing this chunk quite variable which is of type typeface. 127 00:08:25,340 --> 00:08:26,390 So chunk 5. 128 00:08:26,390 --> 00:08:32,560 Assignment operator typeface I referred to the name of this class type for start create from a set. 129 00:08:32,660 --> 00:08:38,130 So as you can see here inside our project structure in say the structure of our project now we can see 130 00:08:38,130 --> 00:08:41,700 here inside these assets folder we have this false directory right. 131 00:08:41,720 --> 00:08:44,860 So I said typeface that create from asset. 132 00:08:44,870 --> 00:08:50,870 So here you are referring to these assets directory get assets as you can see here for the first argument 133 00:08:50,900 --> 00:08:56,080 we need to call the Smurfit get assets in order to access this folder come on for the second argument 134 00:08:56,090 --> 00:09:01,120 we need to specify the specific font that we want to access inside these assets folder. 135 00:09:01,130 --> 00:09:05,900 So as you can see here inside the double quotes here we need to provide a string value right. 136 00:09:06,020 --> 00:09:11,410 So instead of double quotes first I referred to the name of this folder false slash. 137 00:09:11,540 --> 00:09:17,810 And now let's actually go inside these phones for their phones slash John 5.40. 138 00:09:17,840 --> 00:09:23,320 So as you can see here we have this phone here Channel Five with capital C that OTTF here. 139 00:09:23,480 --> 00:09:28,530 So here we are accessing this phone and we hear you are initialising this valuable chunk file. 140 00:09:28,940 --> 00:09:32,660 And here we have in line number six fifty six. 141 00:09:32,660 --> 00:09:38,020 We have these Fauntleroy and very well as you can see here I am initialising this variable so Fauntleroy 142 00:09:38,060 --> 00:09:44,000 Brown assignment operator and then I referred again to the name of this class type face that create 143 00:09:44,000 --> 00:09:49,260 from a set first for the first argument we need to specify that we want to access these assets holders 144 00:09:49,280 --> 00:09:55,580 so get assets come up and we need to specify for the second argument the specific format that we want 145 00:09:55,580 --> 00:09:56,300 to access. 146 00:09:56,300 --> 00:10:01,390 So first because we want to access the phones that are inside of this phone strictly the first referred 147 00:10:01,390 --> 00:10:07,260 to the name of the strictly Faunce slash and then I need to refer to the name of this font Fauntleroy 148 00:10:07,310 --> 00:10:14,050 around that PTF as you can see here this faultily Larry Brown is with the capital F and capital B the 149 00:10:14,050 --> 00:10:15,890 same name that we have here. 150 00:10:15,910 --> 00:10:16,300 OK. 151 00:10:16,300 --> 00:10:21,550 This is very important that the name of your font that you specify here for the sake of argument here 152 00:10:21,550 --> 00:10:28,390 for this for the Smurfette create from acid said you need to actually refer to the exact name Fauntleroy 153 00:10:28,420 --> 00:10:29,980 pronounce that PTF. 154 00:10:30,010 --> 00:10:34,370 This is very important and in line number 47 as you can see here. 155 00:10:34,420 --> 00:10:36,870 I am actually initialising this wonder about them. 156 00:10:37,120 --> 00:10:42,980 So wonder about them or assignment operator typeface that creates what I said for the first argument. 157 00:10:42,980 --> 00:10:47,960 Create from a get assets as you can see here here if you are actually accessing these assets folder 158 00:10:48,070 --> 00:10:52,120 and for the second argument we need to specify the specific fonts that you want to access. 159 00:10:52,270 --> 00:10:56,570 So that slash wonder about space them or that atya. 160 00:10:56,590 --> 00:11:01,310 So as you can see here this is the exact name here wonder about space not at here. 161 00:11:01,930 --> 00:11:06,200 So now the initialized are actually phones here already at Bells. 162 00:11:06,580 --> 00:11:12,880 And now we need to actually put some other logic's here inside these uncreate Mefford.