1 00:00:00,420 --> 00:00:06,000 There's actually a comment out this if else statement here because I want to show you another way in 2 00:00:06,000 --> 00:00:08,900 order to write this line of code here. 3 00:00:08,900 --> 00:00:09,740 These lines of code 4 00:00:15,520 --> 00:00:21,870 so I can just type in C H x true and true yes that said check it. 5 00:00:21,910 --> 00:00:28,390 And here I can actually put in a boolean expression here so I can just put in a pair a pair of round 6 00:00:28,390 --> 00:00:34,980 brackets here and then I can just refer to the name of this true and true valuable true and true. 7 00:00:35,230 --> 00:00:36,080 OK. 8 00:00:36,610 --> 00:00:37,980 Question mark. 9 00:00:38,320 --> 00:00:39,820 True. 10 00:00:40,580 --> 00:00:42,680 Otherwise for us. 11 00:00:43,400 --> 00:00:43,950 OK. 12 00:00:43,990 --> 00:00:51,530 And this means if the value of this true and true valuable is true then X then assigned the value true 13 00:00:51,830 --> 00:00:52,740 to the Smurfette. 14 00:00:52,750 --> 00:00:58,860 This said checked my faith and otherwise if the value of this true and true variable is not true. 15 00:00:58,870 --> 00:01:04,040 So it is false then assign the value false to this strict method. 16 00:01:04,270 --> 00:01:11,170 OK so now let's actually create another line of Cahir see X true and true. 17 00:01:11,170 --> 00:01:14,760 Now that said check it. 18 00:01:14,920 --> 00:01:22,240 And here again I need to put in a pair of round brackets here and now I need to put in an exclamation 19 00:01:22,240 --> 00:01:22,950 mark here. 20 00:01:22,960 --> 00:01:31,880 True and true questionmark true otherwise false. 21 00:01:31,900 --> 00:01:38,180 So here I am specifying that if the value of this true and true value but is not true. 22 00:01:38,260 --> 00:01:39,070 So it is false. 23 00:01:39,070 --> 00:01:46,180 OK if the value of is true and true variable is false then assign the value true to the said checked 24 00:01:46,180 --> 00:01:51,690 Meffert that is related to this see X true and true no object. 25 00:01:52,070 --> 00:01:57,480 And otherwise if the value of this true and true value is actually true. 26 00:01:57,550 --> 00:02:03,420 So as you can see here first we have specified that if the value of this true and true variable is false. 27 00:02:03,430 --> 00:02:03,690 OK. 28 00:02:03,690 --> 00:02:10,630 By putting this exclamation mark we specified that if the value of this true and true value but is false 29 00:02:10,930 --> 00:02:13,830 then assign the value true to this said Chicot method. 30 00:02:14,080 --> 00:02:20,500 Otherwise And that means if the value of these true and true variable is true then assign the value 31 00:02:20,500 --> 00:02:21,780 false to this. 32 00:02:21,790 --> 00:02:22,580 So check the method. 33 00:02:22,600 --> 00:02:23,250 OK. 34 00:02:23,800 --> 00:02:29,910 So if this may sound confusing to you you may want to actually use this if else statements in your code. 35 00:02:29,950 --> 00:02:35,890 And don't worry about our using this way of writing your own code because now you want to actually show 36 00:02:35,890 --> 00:02:39,220 you how you can actually write these expressions. 37 00:02:39,220 --> 00:02:44,660 OK it doesn't really matter whether you try to write IF statements or write your code in this way. 38 00:02:44,790 --> 00:02:45,260 OK. 39 00:02:45,310 --> 00:02:46,660 So hopefully that makes sense. 40 00:02:46,690 --> 00:02:50,780 So as you can see here let's actually run our project and see what happens. 41 00:02:50,970 --> 00:02:51,560 OK. 42 00:02:51,610 --> 00:02:54,840 As you can see here it's now showing us the same results. 43 00:02:54,990 --> 00:02:55,260 OK. 44 00:02:55,270 --> 00:02:58,320 Now as you can see the value of this. 45 00:02:58,690 --> 00:03:01,170 Yes checkbox is actually on. 46 00:03:01,290 --> 00:03:03,690 OK the value of this box is true. 47 00:03:04,000 --> 00:03:04,420 OK. 48 00:03:04,480 --> 00:03:07,390 So this line of code is actually get executed here. 49 00:03:07,650 --> 00:03:08,320 OK. 50 00:03:08,710 --> 00:03:10,490 So hopefully that makes sense. 51 00:03:10,540 --> 00:03:16,750 And let's actually go back inside this content underline line that example and then let's actually dragging 52 00:03:16,990 --> 00:03:21,800 a linearly out horizontal into this linearly Ellsworthy call. 53 00:03:21,970 --> 00:03:24,840 So just click on this linearly or horizontal. 54 00:03:25,270 --> 00:03:31,540 You can actually put it inside this linearly alphabetical order you can actually click on this linearly 55 00:03:31,540 --> 00:03:32,840 output as you call here. 56 00:03:33,230 --> 00:03:33,870 OK. 57 00:03:34,090 --> 00:03:40,950 And then let's actually dragging a a large text view into this linear layout horizontal here. 58 00:03:41,170 --> 00:03:48,020 So just put it inside this linearly and horizontal and then double click and this takes through here. 59 00:03:48,040 --> 00:03:49,780 So for the text just typing here. 60 00:03:49,780 --> 00:03:52,930 True and False. 61 00:03:53,360 --> 00:03:54,100 OK. 62 00:03:54,130 --> 00:04:04,630 And for the ID just typing and for the ID just type in here t x the true and false. 63 00:04:05,050 --> 00:04:05,900 OK. 64 00:04:06,580 --> 00:04:15,360 And here are just press Enter key on your keyboard and then let's actually put tracking two more checkboxes 65 00:04:15,420 --> 00:04:16,030 here inside. 66 00:04:16,210 --> 00:04:23,400 These are linearly out horizontal and by the way we don't need to actually assign an ID to. 67 00:04:23,440 --> 00:04:28,960 These are text views because I don't because we don't want to actually interact with these are text 68 00:04:28,960 --> 00:04:31,210 we use from our Java codes. 69 00:04:31,390 --> 00:04:38,230 But here I just wanted to show you that you can actually assign IDs to your text views in order to interact 70 00:04:38,230 --> 00:04:38,710 with them. 71 00:04:38,740 --> 00:04:43,420 But for this project we don't need to assign an ID to these text use here. 72 00:04:43,420 --> 00:04:43,920 OK. 73 00:04:44,050 --> 00:04:47,990 We just need to assign an ID to these checkboxes here. 74 00:04:48,040 --> 00:04:52,900 So let's actually try again two more checkboxes into this linear layout horizontal. 75 00:04:53,050 --> 00:05:00,100 So just click on the checkbox and then put it inside this linearly out horizontal here and then double 76 00:05:00,100 --> 00:05:04,250 click on this checkbox and for the text just type in here yes. 77 00:05:04,270 --> 00:05:10,510 And for the ID just type in here c h x true and false. 78 00:05:10,900 --> 00:05:11,490 Yes. 79 00:05:11,620 --> 00:05:17,110 And let's actually try again another checkbox into this linearly and horizontal. 80 00:05:17,130 --> 00:05:23,340 So just click on the checkbox here and then put it up beside these are checkbox here and then double 81 00:05:23,340 --> 00:05:24,910 click on this checkbox here. 82 00:05:24,930 --> 00:05:27,240 So for the text just type in here no. 83 00:05:27,270 --> 00:05:34,850 And for the ID just type in here see X true and false no. 84 00:05:35,610 --> 00:05:38,270 And then click on this linearly and horizontal. 85 00:05:38,340 --> 00:05:44,670 And let's actually find the gravity attributes and then check this check box here that says Center underline 86 00:05:44,670 --> 00:05:50,750 horizontal as you can see it's going to actually center the components that are inside of this linearly 87 00:05:50,750 --> 00:05:52,530 out horizontally. 88 00:05:52,590 --> 00:05:53,970 Hopefully that makes sense. 89 00:05:54,300 --> 00:05:59,820 And let's actually go back and say this main activity that you have a file here and then let's actually 90 00:06:00,600 --> 00:06:02,830 create some more objects here. 91 00:06:02,970 --> 00:06:11,050 So here let's actually create a comment here so I can just type in true and false. 92 00:06:11,520 --> 00:06:18,600 Ok so I can just create an object from this text object takes your class and then for the name again 93 00:06:18,600 --> 00:06:28,320 just type in t the true and false and then I need to cast this object to a test object find view by 94 00:06:28,320 --> 00:06:33,990 id r that Id Dot T T true and false. 95 00:06:34,380 --> 00:06:35,240 OK. 96 00:06:35,880 --> 00:06:43,350 And again we don't need to create an object from this test class for this project but of here I just 97 00:06:43,350 --> 00:06:49,500 wanted to show you that you can actually create an object from this class and then relate that this 98 00:06:49,500 --> 00:06:51,200 object to that component. 99 00:06:51,330 --> 00:06:53,700 Inside this screen and interact with it. 100 00:06:53,700 --> 00:06:54,330 OK. 101 00:06:54,690 --> 00:07:01,670 So we need to actually create a checkbox class C X X true and false. 102 00:07:02,100 --> 00:07:03,260 Yes. 103 00:07:03,440 --> 00:07:10,500 Assignment operator and then and then we need to actually cast this object to a checkbox object find 104 00:07:11,010 --> 00:07:18,020 view by id r that Id dot c h x true and false. 105 00:07:18,270 --> 00:07:18,810 Yes. 106 00:07:18,960 --> 00:07:27,600 Again we need to actually create a checkbox class C H x true and false no. 107 00:07:28,080 --> 00:07:33,240 And then I mean to put in an assignment operator here and then we need to actually cast this object 108 00:07:33,240 --> 00:07:34,540 to a checkbox object. 109 00:07:34,600 --> 00:07:36,170 OK fine. 110 00:07:36,290 --> 00:07:45,330 If you by id art that Id dot c c h x true and false. 111 00:07:45,330 --> 00:07:46,380 No. 112 00:07:47,070 --> 00:07:47,730 OK. 113 00:07:48,150 --> 00:07:50,840 So let's actually interact with these objects. 114 00:07:50,880 --> 00:07:58,140 So here let's actually create a comment true and false. 115 00:07:58,140 --> 00:08:06,140 So let's actually create a boolean variable boolean and the name of our variable is true and false. 116 00:08:06,390 --> 00:08:08,900 And then we need to put in an assignment operator here. 117 00:08:08,910 --> 00:08:12,760 So let's actually assign a boolean expression to this variable. 118 00:08:12,810 --> 00:08:17,890 True and false. 119 00:08:18,540 --> 00:08:23,640 And then it's actually putting a semicolon at the end of our statement and then we can actually create 120 00:08:24,300 --> 00:08:25,470 an if statement here. 121 00:08:25,470 --> 00:08:33,710 If true and false and this means if the value of is true and false value but it is true. 122 00:08:33,930 --> 00:08:41,070 So if the value of this expression evaluates to true that true value is going to be assigned to this 123 00:08:41,070 --> 00:08:48,900 true and false value variable and if the value of this true and false value but is true then execute 124 00:08:48,990 --> 00:08:54,740 this line of code here inside of these curly braces C S X true and false. 125 00:08:54,990 --> 00:08:59,210 Yes that said check it. 126 00:08:59,680 --> 00:09:03,400 True it it's going to actually check this checkbox here. 127 00:09:03,410 --> 00:09:06,070 As you can see it's going to take this a yes checkbox. 128 00:09:06,110 --> 00:09:18,050 If the value of this true and false that valuable is true OK and if and else if the value of this true 129 00:09:18,080 --> 00:09:20,450 and false value bet is false. 130 00:09:20,450 --> 00:09:22,040 So exclamation mark. 131 00:09:22,040 --> 00:09:26,460 True and False. 132 00:09:26,510 --> 00:09:29,970 Then execute this line of code here inside of this curly braces. 133 00:09:29,990 --> 00:09:32,860 See it's true and false. 134 00:09:33,080 --> 00:09:39,570 No that said checked. 135 00:09:39,780 --> 00:09:42,370 OK so hopefully that makes sense. 136 00:09:42,740 --> 00:09:45,590 And let's actually run our project and see what happens.