1 00:00:00,240 --> 00:00:05,100 And essentially create another takes object takes the two stars. 2 00:00:05,100 --> 00:00:13,650 Student Okay and then puts an assignment operator here and it actually has this object to a text object 3 00:00:14,880 --> 00:00:19,710 find view by ID or that Id dot DX the two stars. 4 00:00:19,710 --> 00:00:30,630 Student Okay so now let's actually create another text view object text view the one star student OK. 5 00:00:32,600 --> 00:00:37,980 And then it's actually put an assignment operator here and now this actually cast this object to a text 6 00:00:38,110 --> 00:00:39,100 object. 7 00:00:39,770 --> 00:00:46,050 Find your boy Id are that ID that TXI the one star student OK. 8 00:00:46,430 --> 00:00:49,870 And let's actually put a semicolon at the end of our statement. 9 00:00:49,880 --> 00:00:58,690 So now I try to create some rating but optics So OK so just type in here rating bar or TV five stars. 10 00:00:58,700 --> 00:01:00,530 Student okay. 11 00:01:00,680 --> 00:01:04,350 As you can see this is the name of our record breaking but object. 12 00:01:04,550 --> 00:01:05,290 OK. 13 00:01:05,690 --> 00:01:08,090 And then let's actually put an assignment operator. 14 00:01:08,090 --> 00:01:16,180 And now this actually has this object or writing but object find view by ID are thought Id that are 15 00:01:16,260 --> 00:01:18,170 to be five stars. 16 00:01:18,170 --> 00:01:19,130 Student Okay. 17 00:01:19,310 --> 00:01:23,000 So now let's actually put a semicolon at the end of our statement. 18 00:01:23,030 --> 00:01:25,870 So now let's actually hold the Command key. 19 00:01:26,090 --> 00:01:30,320 If you are using a match with this you can actually to actually hold the Command key. 20 00:01:30,620 --> 00:01:36,160 And if you are using a Windows machine you need to actually hold the control key and then click on the 21 00:01:36,290 --> 00:01:42,920 rating Bar class here as you can see here this rating Burke class is actually the inheriting all of 22 00:01:42,920 --> 00:01:46,220 the features and behaviors that are inside of these apps. 23 00:01:46,250 --> 00:01:47,080 Senior Class. 24 00:01:47,090 --> 00:01:47,520 OK. 25 00:01:47,690 --> 00:01:51,890 So just hold the command key and then click on these apps apps. 26 00:01:51,960 --> 00:01:58,430 See here but here are secret class and this app secret world class is actually inheriting all of the 27 00:01:58,430 --> 00:02:02,670 features that are actually the inside of this program SPARC class. 28 00:02:02,820 --> 00:02:09,260 This and these programs spark class is actually inheriting that all of the features that are inside 29 00:02:09,260 --> 00:02:10,940 of these viewless. 30 00:02:10,970 --> 00:02:15,700 So now we can understand that this rating per class is actually a view class. 31 00:02:15,710 --> 00:02:20,920 Ok there is and is our relationship between this rating world class and the view class. 32 00:02:21,020 --> 00:02:21,670 OK. 33 00:02:22,040 --> 00:02:28,610 Because this progress bar is actually inheriting all of the features and behaviors that are inside of 34 00:02:28,610 --> 00:02:34,170 this of your class so that we can understand that this rating class is actually of your class. 35 00:02:34,190 --> 00:02:37,690 There is and is our relationship between these two classes. 36 00:02:37,700 --> 00:02:40,420 So now let's actually close these classes. 37 00:02:40,460 --> 00:02:41,270 OK here. 38 00:02:41,330 --> 00:02:44,350 Close this progress bar class 2 and here. 39 00:02:44,610 --> 00:02:48,730 Now you can understand why we need to actually cast this object to a rating object. 40 00:02:48,880 --> 00:02:49,290 OK. 41 00:02:49,370 --> 00:02:55,900 So that the compiler knows that we are actually dealing with actually a real rating but object not our 42 00:02:55,910 --> 00:02:56,550 view object. 43 00:02:56,570 --> 00:02:57,020 OK. 44 00:02:57,140 --> 00:03:02,130 So this actually creates an another rating but object are to be four stars. 45 00:03:02,150 --> 00:03:02,930 STUDENT. 46 00:03:02,960 --> 00:03:07,790 And then it's actually an assignment operator here and now let's actually cast this object to a rating 47 00:03:08,330 --> 00:03:09,180 object. 48 00:03:09,290 --> 00:03:10,410 OK fine. 49 00:03:10,410 --> 00:03:19,480 View by our thoughts are ID that are TB that are TB for starters. 50 00:03:19,560 --> 00:03:24,770 Student Okay and now let's actually put a semicolon at the end of our statement. 51 00:03:24,890 --> 00:03:30,930 Let's actually create another rating board object rating bar r t b freestylers. 52 00:03:30,980 --> 00:03:34,710 Student Okay and then let's actually put an assignment operator here. 53 00:03:34,910 --> 00:03:38,730 And now this actually has this object to a rating object rating board. 54 00:03:38,870 --> 00:03:45,170 OK fine view by id thought Id dot Arti be free of stars. 55 00:03:45,170 --> 00:03:53,720 Student Okay let's actually create another rating but object rating about RTP to start. 56 00:03:53,750 --> 00:03:54,350 Student 57 00:03:58,030 --> 00:04:06,430 Okay and then let's actually has this object to a rating but object find view by ID or ID that Arti 58 00:04:06,460 --> 00:04:07,810 be two stars. 59 00:04:07,820 --> 00:04:09,100 Student Okay. 60 00:04:10,220 --> 00:04:14,460 And now let's actually create another rating Bar object. 61 00:04:14,510 --> 00:04:22,910 So just typing here 18 bar RTP one starts student OK and then it's actually an assignment operator here 62 00:04:23,360 --> 00:04:31,460 and then it's actually cestus object or 18 but object find view by ID or that Id dot RTP. 63 00:04:31,470 --> 00:04:32,590 One starts student. 64 00:04:32,590 --> 00:04:36,360 OK so now let's actually create a button object. 65 00:04:36,380 --> 00:04:36,880 OK. 66 00:04:37,040 --> 00:04:41,290 So just type in here button PTEN results. 67 00:04:41,930 --> 00:04:48,690 Ok this is the name of our button and let's just actually put an assignment operator here and now it's 68 00:04:48,690 --> 00:04:51,350 actually the Chrestus object to our button object. 69 00:04:51,350 --> 00:04:55,840 So just typing here a button inside the prentices as you can see here. 70 00:04:56,270 --> 00:05:02,790 Find you by ID are thought Id dots between results. 71 00:05:02,930 --> 00:05:03,380 OK. 72 00:05:03,590 --> 00:05:06,450 So now let's actually run our project and see what happens. 73 00:05:06,500 --> 00:05:11,720 So as you can see here and now our application is actually running on this emulator and here as you 74 00:05:11,720 --> 00:05:15,030 can see these are my R-rating bars as you can see here. 75 00:05:15,050 --> 00:05:20,840 And this is our button as you can see here we can interact with these rating boards for example as you 76 00:05:20,840 --> 00:05:26,810 can see it is a five star rating but here as you can see I can actually make it two stars OK or four 77 00:05:26,820 --> 00:05:28,280 stars or three stars. 78 00:05:28,280 --> 00:05:28,580 OK. 79 00:05:28,590 --> 00:05:32,070 By just interacting and clicking on these stars here. 80 00:05:32,090 --> 00:05:32,900 OK. 81 00:05:33,200 --> 00:05:40,790 So now I I don't want for this application I don't want to allow the user to be able to change the values 82 00:05:40,790 --> 00:05:42,640 of these rating words OK. 83 00:05:42,650 --> 00:05:47,790 I don't want to use it to be able to interact with these rating bars. 84 00:05:47,810 --> 00:05:51,070 I just want to show the user that these are the values. 85 00:05:51,110 --> 00:05:51,720 OK. 86 00:05:51,950 --> 00:05:57,460 And I don't want the user to actually to change the values of these rating bars. 87 00:05:57,590 --> 00:06:02,390 So for that reason for that purpose I need to actually call Smurfette on these rating bars. 88 00:06:02,400 --> 00:06:02,870 OK. 89 00:06:02,960 --> 00:06:07,140 Let's actually referred to the name of this RTP five stars student here. 90 00:06:07,160 --> 00:06:08,600 As you can see typing here. 91 00:06:08,600 --> 00:06:09,510 DOT. 92 00:06:09,980 --> 00:06:11,910 And now I want to actually call Smurfette. 93 00:06:11,930 --> 00:06:13,660 And these are Tibe 5 stars. 94 00:06:13,670 --> 00:06:17,520 The student set is indicator. 95 00:06:17,990 --> 00:06:22,760 So we actually assign the value true to this method let's see what happens. 96 00:06:22,760 --> 00:06:23,570 True. 97 00:06:24,050 --> 00:06:26,870 And let's actually run our project and see what happens. 98 00:06:26,870 --> 00:06:32,020 So as you can see here this is our rating but here this is our five star rating board here. 99 00:06:32,330 --> 00:06:39,130 And I actually called this set is indicator method with this object RTP RTP five stars. 100 00:06:39,150 --> 00:06:41,780 Student And I assigned the value true to this method. 101 00:06:41,780 --> 00:06:48,290 OK so now if we actually click on this on these stars here as you can see I cannot change the value 102 00:06:48,290 --> 00:06:51,340 of these five stars are RTP five stars. 103 00:06:51,340 --> 00:06:51,980 Student here. 104 00:06:51,980 --> 00:06:52,290 OK. 105 00:06:52,340 --> 00:06:58,940 I cannot change the value of this rating but but for the other 18 bars I can still change the values 106 00:06:59,270 --> 00:07:01,230 of these rating boards here. 107 00:07:01,230 --> 00:07:01,730 OK. 108 00:07:01,850 --> 00:07:06,440 So I need to actually call the Smurfette on other rating board objects too. 109 00:07:06,440 --> 00:07:07,080 OK. 110 00:07:07,640 --> 00:07:11,750 So let's actually go back inside this main activity or job of right here. 111 00:07:11,900 --> 00:07:15,790 So RTP are TB. 112 00:07:15,910 --> 00:07:19,870 For starters student data set is indicator. 113 00:07:19,910 --> 00:07:20,260 True. 114 00:07:20,300 --> 00:07:24,550 So by default the value of this Meffert is false. 115 00:07:24,560 --> 00:07:25,160 OK. 116 00:07:25,280 --> 00:07:29,030 De-value that is actually is assigned to the Smurfette is actually false. 117 00:07:29,060 --> 00:07:34,220 So if we actually change that value I need to actually assign the value true to this method so that 118 00:07:34,220 --> 00:07:38,450 they use that they use that cannot actually interact with these rating boards. 119 00:07:38,750 --> 00:07:39,220 OK. 120 00:07:39,290 --> 00:07:42,790 So that the user can change the values of these rating boards. 121 00:07:42,790 --> 00:07:43,360 OK. 122 00:07:43,400 --> 00:07:53,800 So again I need to just step in here RTP Freestar student that sets his indicator true RTP. 123 00:07:54,480 --> 00:07:55,980 Two stars student. 124 00:07:56,240 --> 00:07:58,350 That set is indicator. 125 00:07:58,370 --> 00:07:59,680 True. 126 00:08:00,570 --> 00:08:06,860 And RTP one starts student that set is indicator. 127 00:08:07,130 --> 00:08:09,380 True as you can see here. 128 00:08:09,620 --> 00:08:14,640 I can actually use the encapsulation technique here for these methods. 129 00:08:14,660 --> 00:08:15,020 OK. 130 00:08:15,140 --> 00:08:17,980 As you can see I am actually duplicating some lines of code here. 131 00:08:17,990 --> 00:08:18,260 OK. 132 00:08:18,270 --> 00:08:25,490 I'm actually calling this method to every one of these objects so here I can actually use that encapsulation. 133 00:08:25,490 --> 00:08:32,570 And in this way by using in translation technique in your programs your applications would have a list 134 00:08:32,570 --> 00:08:33,080 box. 135 00:08:33,080 --> 00:08:40,370 OK so now I want to actually create a method inside this main activity class and outside of this uncreate 136 00:08:40,370 --> 00:08:40,920 method. 137 00:08:41,060 --> 00:08:47,080 So after the ending curly brace of this uncreate method here I want to actually create a method. 138 00:08:47,090 --> 00:08:55,630 So just typing here public Voyt and the name of this method is make this rating bar. 139 00:08:55,730 --> 00:08:56,430 OK. 140 00:08:56,920 --> 00:09:04,790 The chapter and now I want to actually specify that this is going to actually accept an argument of 141 00:09:04,790 --> 00:09:11,940 type rating but what the suit the name of this argument is rating board and that I need to actually 142 00:09:11,960 --> 00:09:14,870 open and close the Smurfit by using these curly braces. 143 00:09:14,870 --> 00:09:17,950 So as you can see here this method has actually a prime meter. 144 00:09:17,960 --> 00:09:18,590 OK. 145 00:09:18,800 --> 00:09:24,980 Listen if it has an argument and now I can't just refer to the name of this argument rating but that 146 00:09:24,990 --> 00:09:27,240 set is indicator. 147 00:09:27,270 --> 00:09:28,360 True. 148 00:09:29,210 --> 00:09:29,870 OK. 149 00:09:30,110 --> 00:09:36,260 So now instead of just writing these lines of code if we actually comment out these lines of code here 150 00:09:37,220 --> 00:09:40,160 and now I can just only refer to the name of that. 151 00:09:40,160 --> 00:09:48,620 Make these this rating bar indicator and inside the apprentice's I need to actually put a value of type 152 00:09:48,650 --> 00:09:52,590 rating bar so I can just type in RTP Five-Star. 153 00:09:52,640 --> 00:09:57,990 Student make this routine but indicator Arti be false starts. 154 00:09:57,990 --> 00:10:09,830 Student make this rating but indicator RTP starts student make this rating bar indicator RTP to start 155 00:10:09,850 --> 00:10:15,940 a student make these rating but indicate indicator RTP. 156 00:10:16,250 --> 00:10:17,800 One star student. 157 00:10:18,080 --> 00:10:21,680 OK so now let's actually run our project and see what happens.