1 00:00:00,720 --> 00:00:09,370 And then double clicking on these takes you here and just typing here are false or true. 2 00:00:09,480 --> 00:00:10,330 OK. 3 00:00:10,890 --> 00:00:16,530 And then let's throw in a check box into this linearly out horizontal double click on it. 4 00:00:16,770 --> 00:00:18,170 Yes. 5 00:00:18,180 --> 00:00:24,780 And for the ID just type in here see x x false or true. 6 00:00:25,080 --> 00:00:25,610 Yes. 7 00:00:25,680 --> 00:00:31,500 And then dragon and others take checkbox into this linearly and horizontal double click on it for the 8 00:00:31,500 --> 00:00:33,090 text just typing no. 9 00:00:33,360 --> 00:00:38,620 And for the ID just type in C is x false or true. 10 00:00:39,090 --> 00:00:41,160 No OK. 11 00:00:41,180 --> 00:00:46,670 So as you can see here the idea of this checkbox is C.H. x false or true yes. 12 00:00:46,760 --> 00:00:50,830 And the idea of this checkbox is see it x false or true. 13 00:00:50,840 --> 00:00:51,240 No. 14 00:00:51,320 --> 00:00:52,480 OK. 15 00:00:52,490 --> 00:00:57,890 And then click on these linearly out here and then let's actually find the gravity attribute as you 16 00:00:57,890 --> 00:01:03,890 can see here and check the checkbox of the center underline horizontal here. 17 00:01:03,920 --> 00:01:04,870 OK. 18 00:01:05,210 --> 00:01:11,440 So as you can see here now these components are positioned at the center of this linearly and horizontally 19 00:01:11,440 --> 00:01:12,360 OK. 20 00:01:12,440 --> 00:01:15,730 So now let's actually go back inside this main activity that gello fight here. 21 00:01:15,740 --> 00:01:23,060 Let's actually scroll to the top of the screen and here it's actually create a comment false. 22 00:01:24,760 --> 00:01:26,140 All true. 23 00:01:26,380 --> 00:01:27,010 OK. 24 00:01:27,340 --> 00:01:41,190 So just create a checkbox object C is x false or true yes assignment operator checkbox as you can see 25 00:01:41,190 --> 00:01:52,330 I am casting this object to a checkbox object find view by ID are thought id that C is x false or true. 26 00:01:52,800 --> 00:02:01,630 Yes that's actually again create another checkbox object here see x false or true. 27 00:02:02,010 --> 00:02:04,540 No assignment operator. 28 00:02:04,740 --> 00:02:12,780 Now let's actually cast this object to a checkbox object find view of why ID are that Id dot C is x 29 00:02:12,780 --> 00:02:15,850 false or true. 30 00:02:15,850 --> 00:02:16,980 No here. 31 00:02:17,380 --> 00:02:19,310 OK so now let's actually. 32 00:02:19,380 --> 00:02:22,480 OK so now let's actually scroll down the screen here. 33 00:02:22,830 --> 00:02:29,490 And let's here actually create a comment false or true. 34 00:02:29,910 --> 00:02:38,600 And let's actually create a boolean variable boolean and the name of our value above is false or true. 35 00:02:38,700 --> 00:02:40,260 Assignment operator. 36 00:02:40,470 --> 00:02:43,470 Now this actually creates a boolean expression. 37 00:02:43,470 --> 00:02:44,370 False. 38 00:02:44,370 --> 00:02:46,130 All true. 39 00:02:46,490 --> 00:02:47,170 OK. 40 00:02:47,460 --> 00:02:50,920 And then I need to put in a semi-colon at the end of my statement. 41 00:02:51,030 --> 00:02:56,010 So as you can see here I created a boolean value table and I assigned this value to already. 42 00:02:56,020 --> 00:02:58,950 But OK this is a boolean expression. 43 00:02:59,190 --> 00:03:04,130 And here the result of this expression is going to be assigned to this variable. 44 00:03:04,340 --> 00:03:09,900 Ok the value of this expression is either true or false and that value is going to be assigned to this 45 00:03:09,900 --> 00:03:10,760 variable. 46 00:03:11,040 --> 00:03:13,720 So let's actually create an if statement here. 47 00:03:13,740 --> 00:03:22,560 If the value of the false or true variable is true then execute this line of code here inside of these 48 00:03:22,560 --> 00:03:25,720 curly braces C is x false. 49 00:03:25,810 --> 00:03:27,930 All true yes. 50 00:03:28,020 --> 00:03:29,760 That said check it. 51 00:03:29,920 --> 00:03:30,840 True. 52 00:03:31,380 --> 00:03:32,020 OK. 53 00:03:32,430 --> 00:03:38,580 Otherwise else if the value of this false or true variable is not true. 54 00:03:38,700 --> 00:03:46,930 So it is false then executes these lines of this line of code inside of this curly braces. 55 00:03:46,980 --> 00:03:51,250 So C is x false or true. 56 00:03:51,450 --> 00:03:55,420 No that's checked true. 57 00:03:56,160 --> 00:03:59,820 OK so now let's actually run our project and see what happens. 58 00:03:59,820 --> 00:04:00,110 OK. 59 00:04:00,120 --> 00:04:04,870 As you can see here our application is actually running on this emulator here. 60 00:04:04,950 --> 00:04:10,170 And as you can see the value of this false or true variable is actually true. 61 00:04:10,200 --> 00:04:13,850 So this yes checkbox here is actually checked on. 62 00:04:14,050 --> 00:04:14,780 OK. 63 00:04:15,000 --> 00:04:22,590 So here we specify that if the value of this false or true idea is true then execute this line of code 64 00:04:22,590 --> 00:04:29,670 here which is related to this object to this component and else if the value of the is false or true 65 00:04:29,670 --> 00:04:37,620 variable is false then execute this line of code here then that is actually related to this component 66 00:04:37,620 --> 00:04:38,370 here. 67 00:04:38,370 --> 00:04:42,940 So because this value is true the value of this false or true variable is true. 68 00:04:42,990 --> 00:04:47,480 So this checkbox is actually checked on yes checkbox. 69 00:04:47,490 --> 00:04:53,790 So let's actually comment out this if else statement here because I want to actually show you another 70 00:04:53,790 --> 00:04:58,910 way in order to write up these these statements. 71 00:04:58,920 --> 00:04:59,550 OK. 72 00:04:59,550 --> 00:05:02,500 C is x false or true. 73 00:05:02,820 --> 00:05:08,600 Yes that said check it and then let's put in a pair of round brackets. 74 00:05:08,640 --> 00:05:12,380 And then inside the practice's just type in here for us. 75 00:05:12,630 --> 00:05:13,850 All true. 76 00:05:14,370 --> 00:05:14,800 OK. 77 00:05:14,820 --> 00:05:15,770 Question mark. 78 00:05:15,770 --> 00:05:19,840 True otherwise false. 79 00:05:19,860 --> 00:05:26,990 Ok here I am saying that if the value of this false or true variable is true then assigned the value 80 00:05:27,010 --> 00:05:31,190 true to my to this said check the method that is related to this object. 81 00:05:31,200 --> 00:05:38,080 Ok to this object and otherwise see it x false or true. 82 00:05:38,280 --> 00:05:44,250 No that said checked and then is actually put in a pair of round brackets here. 83 00:05:44,490 --> 00:05:45,490 Exclamation mark. 84 00:05:45,510 --> 00:05:48,760 False or true. 85 00:05:48,870 --> 00:05:54,230 OK questionmark true colon false. 86 00:05:55,040 --> 00:06:02,720 Ok Here again I am saying that if the value of this are false or true valuable is false then assigned 87 00:06:02,720 --> 00:06:11,410 the value of true might see it x false or true no object otherwise assign the value false to this object. 88 00:06:11,430 --> 00:06:12,260 OK. 89 00:06:12,600 --> 00:06:15,120 So hopefully that makes sense. 90 00:06:15,270 --> 00:06:19,570 And let's actually run our project again in order to see the results again. 91 00:06:19,720 --> 00:06:20,130 OK. 92 00:06:20,130 --> 00:06:23,850 As you can see here again this value is actually true. 93 00:06:23,940 --> 00:06:26,050 OK this checkbox is checked on. 94 00:06:26,280 --> 00:06:29,580 And this means the value of this checkbox is true. 95 00:06:29,580 --> 00:06:32,990 So the value of this false or true variable is true. 96 00:06:33,180 --> 00:06:40,210 OK so now it is actually again go back inside this content underline main that example again. 97 00:06:40,340 --> 00:06:46,430 Let's try again another linearly with horizontal into this linearly out of vertical. 98 00:06:46,980 --> 00:06:50,020 OK let's actually close this linearly out here. 99 00:06:50,060 --> 00:06:55,080 Inside these are componentry by actually clicking on this little triangle here. 100 00:06:55,220 --> 00:06:59,690 And let's throw in a large takes you into this linearly out here. 101 00:06:59,720 --> 00:07:06,800 You can just put it here or you can just put it inside these component at three and then you can click 102 00:07:06,860 --> 00:07:09,210 on this linearly out horizontal. 103 00:07:09,740 --> 00:07:18,320 So let's actually double click on this text you hear for the text just typing false or false. 104 00:07:19,130 --> 00:07:23,210 And then it's actually dragging a checkbox into this. 105 00:07:23,310 --> 00:07:27,530 You lay out double click on the double click on it. 106 00:07:27,650 --> 00:07:30,070 And for the text just type in here yes. 107 00:07:30,200 --> 00:07:36,430 And for the ID just type in here see it x false or false. 108 00:07:36,740 --> 00:07:38,610 Yes. 109 00:07:38,780 --> 00:07:44,570 Again let's actually try again a checkbox this linearly or horizontal. 110 00:07:44,570 --> 00:07:48,260 Double click on it for the text just type in no. 111 00:07:48,560 --> 00:07:56,140 And for the ID just type in C H x false or false no. 112 00:07:56,680 --> 00:07:57,370 OK. 113 00:07:57,800 --> 00:08:01,660 So yes and no. 114 00:08:02,280 --> 00:08:03,040 OK. 115 00:08:03,560 --> 00:08:05,420 So hopefully that makes sense. 116 00:08:05,570 --> 00:08:13,250 And then click on this Ninio out horizontal and check this center underline how horizontal as you can 117 00:08:13,250 --> 00:08:19,790 see set center underline horizontal here that is related to the gravity attribute of this linearly out 118 00:08:19,850 --> 00:08:20,450 horizontal. 119 00:08:20,450 --> 00:08:21,270 OK. 120 00:08:21,950 --> 00:08:28,600 So it's going to actually position these components in the center of these linearly and horizontally 121 00:08:28,600 --> 00:08:29,510 OK. 122 00:08:29,510 --> 00:08:33,290 So now let's actually go back and say this main activity that job of here. 123 00:08:33,590 --> 00:08:44,470 And let's scroll to the top of the screen and here it is actually create a comment so false or false. 124 00:08:44,480 --> 00:08:45,690 OK. 125 00:08:46,670 --> 00:08:54,550 And then let's actually create a checkbox object see x false or false. 126 00:08:55,190 --> 00:08:56,660 Yes. 127 00:08:56,660 --> 00:08:58,140 Assignment operator. 128 00:08:58,220 --> 00:09:06,830 Now we need to actually cast this object into a checkbox object find view by Id or At that the dot. 129 00:09:06,980 --> 00:09:11,330 See it checks false or false. 130 00:09:11,610 --> 00:09:17,330 Yes semicolon at the end of or statement is necessary again. 131 00:09:17,420 --> 00:09:20,100 It's actually create a checkbox object text. 132 00:09:20,210 --> 00:09:23,500 False or false. 133 00:09:24,410 --> 00:09:26,930 No assignment operator. 134 00:09:27,110 --> 00:09:28,170 Let's actually put. 135 00:09:28,220 --> 00:09:33,250 I actually cast this object to a checkbox object find view. 136 00:09:33,320 --> 00:09:42,510 Art ID or that Id dot see it checks false or false no. 137 00:09:42,800 --> 00:09:47,840 And then this actually puts a semicolon at the end of our statement. 138 00:09:47,840 --> 00:09:52,680 So now let's actually scroll to get to the bottom of the screen. 139 00:09:52,700 --> 00:09:58,230 So now let's actually scroll to the bottom of this file here and now.