1 00:00:00,920 --> 00:00:10,490 So as you can see here I made this up object this checkbox here a listener to the clicks that the user 2 00:00:10,490 --> 00:00:10,940 make. 3 00:00:11,090 --> 00:00:17,000 So whenever that they actually click on the checkbox a dismembered is going to be called said unclick 4 00:00:17,030 --> 00:00:17,700 listener. 5 00:00:17,720 --> 00:00:18,190 OK. 6 00:00:18,380 --> 00:00:23,200 So inside of this on Comerford I can just put in my own quotes. 7 00:00:23,210 --> 00:00:26,730 So first of all I want to actually create an if statement. 8 00:00:26,960 --> 00:00:31,540 And inside Apprentice's I can just typing C is X.. 9 00:00:31,580 --> 00:00:35,250 Healthy Yes that is checked. 10 00:00:35,300 --> 00:00:40,420 So now I need to actually open and close this statement by using these curly braces. 11 00:00:40,460 --> 00:00:42,060 So now what's going on. 12 00:00:42,410 --> 00:00:45,910 As you can see here first of all I created an if statement. 13 00:00:45,950 --> 00:00:46,600 OK. 14 00:00:46,910 --> 00:00:54,380 And inside Apprentice's of this if statement I specified a condition first I actually referred to the 15 00:00:54,380 --> 00:00:59,380 name of this see as healthy as object as you can see here. 16 00:00:59,500 --> 00:00:59,950 OK. 17 00:01:00,000 --> 00:01:05,940 So and then I actually called this is checked my effect on this object. 18 00:01:05,990 --> 00:01:09,670 So this method actually returns a boolean value. 19 00:01:09,900 --> 00:01:11,540 OK true or false. 20 00:01:11,540 --> 00:01:15,840 So as you can see here when I actually check this checkbox here. 21 00:01:15,980 --> 00:01:20,800 Now as you can see the value of this checkbox is true. 22 00:01:21,100 --> 00:01:21,690 OK. 23 00:01:21,890 --> 00:01:26,790 And when I actually check of this checkbox the value of this checkbox is false. 24 00:01:26,900 --> 00:01:27,410 OK. 25 00:01:27,680 --> 00:01:29,410 So that's the job of this method. 26 00:01:29,600 --> 00:01:33,540 Well I actually called this is checked method on does see it. 27 00:01:33,590 --> 00:01:35,710 Healthy Yes object. 28 00:01:35,810 --> 00:01:38,950 I am actually specifying the value of this checkbox. 29 00:01:38,990 --> 00:01:39,450 OK. 30 00:01:39,590 --> 00:01:45,510 So if I actually check this checkbox and if I actually if the value of the checkbox is on. 31 00:01:45,680 --> 00:01:48,720 Now this method actually returns the value true. 32 00:01:48,740 --> 00:01:52,190 But if you actually check off this check check box. 33 00:01:52,190 --> 00:01:55,970 Now this method actually returns the value for this. 34 00:01:55,970 --> 00:01:58,910 OK because I actually checked of this checkbox. 35 00:01:58,910 --> 00:01:59,440 OK. 36 00:01:59,540 --> 00:02:02,360 So this method actually returns a boolean value. 37 00:02:02,360 --> 00:02:03,430 True or false. 38 00:02:03,590 --> 00:02:09,820 And that value is actually determined by actually check checking on or checking of the check box. 39 00:02:09,920 --> 00:02:10,610 OK. 40 00:02:11,090 --> 00:02:19,590 So here I am actually specifying that if they return the value of this checkbox is true if the check 41 00:02:19,590 --> 00:02:24,000 box is on OK or if the value of this checkbox is true. 42 00:02:24,320 --> 00:02:31,830 Now I can actually put in my own codes inside of this statement see X healthy no. 43 00:02:32,030 --> 00:02:38,240 So now I am actually fairly end to the name of this object see as healthy no object to that to the name 44 00:02:38,240 --> 00:02:40,260 of this check box here OK. 45 00:02:40,360 --> 00:02:46,920 C S S Helfen no doubt set checked Fahd's. 46 00:02:47,040 --> 00:02:50,140 OK so when I actually check this checkbox. 47 00:02:50,150 --> 00:02:56,900 So if the value of this checkbox is true the value of this checkbox must be false. 48 00:02:57,030 --> 00:02:57,550 OK. 49 00:02:57,630 --> 00:03:00,890 So that's why I actually created this statement here. 50 00:03:01,530 --> 00:03:02,140 Here I am. 51 00:03:02,190 --> 00:03:08,700 I am actually specifying that if the value of this checkbox is true the value of the tick box must be 52 00:03:08,700 --> 00:03:09,410 false. 53 00:03:09,650 --> 00:03:10,210 OK. 54 00:03:10,320 --> 00:03:17,370 So for example imagine that I actually checked this checkbox here and now as you can see I created a 55 00:03:17,370 --> 00:03:20,910 set unclick listener for this see as a healthy Yes object. 56 00:03:20,910 --> 00:03:21,330 OK. 57 00:03:21,420 --> 00:03:25,500 So now as you can see the value of this checkbox is true. 58 00:03:25,650 --> 00:03:26,120 OK. 59 00:03:26,250 --> 00:03:28,310 I actually checked this checkbox. 60 00:03:28,510 --> 00:03:33,220 And now if I actually check this checkbox as you can see the value of this. 61 00:03:33,240 --> 00:03:39,030 And now if we actually take this checkbox the value of these checkbooks must be false. 62 00:03:39,030 --> 00:03:42,280 So let's actually run our project and test this code. 63 00:03:42,300 --> 00:03:42,850 OK. 64 00:03:42,930 --> 00:03:43,380 OK. 65 00:03:43,470 --> 00:03:47,670 As you can see now our application is actually running on this emulator. 66 00:03:48,000 --> 00:03:50,840 So here let's actually check this checkbox here. 67 00:03:51,060 --> 00:03:58,190 As you can see let's check this checkbox and here as you can see I actually made this checkbox a listener 68 00:03:58,680 --> 00:04:00,980 to the clique's that the user make. 69 00:04:01,200 --> 00:04:01,500 OK. 70 00:04:01,500 --> 00:04:02,930 And inside is unclear. 71 00:04:02,980 --> 00:04:08,790 Mefford I actually created an if statement and then I actually referred to the name of this checkbox 72 00:04:08,910 --> 00:04:10,000 and then I called. 73 00:04:10,020 --> 00:04:13,500 This is checked Meffert on this object. 74 00:04:13,500 --> 00:04:15,970 And this if it returns a boolean value. 75 00:04:16,020 --> 00:04:17,110 True or false. 76 00:04:17,250 --> 00:04:24,630 If this if the value of this checkbox is true that this returns the value true and if this and if the 77 00:04:24,630 --> 00:04:29,750 value of this checkbox is false this method actually returns the value of once. 78 00:04:30,000 --> 00:04:37,410 And here I am telling that if the value of this checkbox is true if you actually click on this or checkbox 79 00:04:37,890 --> 00:04:43,800 and this checkbox returns the value true to me and then I can actually execute this line of code here 80 00:04:44,090 --> 00:04:47,250 C-h X Helfen know that said check it for us. 81 00:04:47,250 --> 00:04:51,230 So this means this means that this checkbox is going to be checked off. 82 00:04:51,540 --> 00:04:52,030 OK. 83 00:04:52,170 --> 00:04:54,510 So let's actually check this check box here. 84 00:04:54,510 --> 00:04:58,810 As you can see now this check box is actually checked off. 85 00:04:59,070 --> 00:04:59,680 OK. 86 00:04:59,910 --> 00:05:01,440 So hopefully that makes sense. 87 00:05:01,440 --> 00:05:06,740 So now let's actually make this checkbox a listener to the clicks that they use and make. 88 00:05:06,760 --> 00:05:09,630 Because now if we actually click on the check box here. 89 00:05:09,630 --> 00:05:12,710 Now as you can see if these two take box are checked on. 90 00:05:13,020 --> 00:05:16,520 So let's actually create a set and click listener for this checkbox. 91 00:05:16,530 --> 00:05:18,140 And here after this after this. 92 00:05:18,150 --> 00:05:20,040 So then click listen for this. 93 00:05:20,040 --> 00:05:26,400 See as a whole for Yes I can actually refer to the name of the C as x Helfen no object data said unclick 94 00:05:26,480 --> 00:05:31,280 listener new view that unclick listener. 95 00:05:31,440 --> 00:05:36,520 Now as you can see inside this unclick my friend I can actually put my Ancoats. 96 00:05:36,570 --> 00:05:46,890 So if H x Helfen no dot dot is checked inside the curly braces. 97 00:05:46,890 --> 00:05:54,650 I can put my Ancoats see x x healthy Yes that said checked Fahd's. 98 00:05:55,370 --> 00:05:55,830 OK. 99 00:05:55,950 --> 00:06:00,750 Again I am actually making this object this checkbox. 100 00:06:00,750 --> 00:06:03,560 Or listening to the clicks that the user make. 101 00:06:03,900 --> 00:06:06,550 And then I am inside this unclick my faith. 102 00:06:06,570 --> 00:06:08,540 I created an if statement. 103 00:06:08,700 --> 00:06:14,130 And here I am telling the computer that if the value of this checkbox is true if the returned value 104 00:06:14,370 --> 00:06:22,620 of the second box is true or if this checkbox is on and an inside the curly braces Please execute this 105 00:06:22,620 --> 00:06:23,580 line of code here. 106 00:06:23,660 --> 00:06:24,940 S.H. exhale for years. 107 00:06:24,960 --> 00:06:28,430 So this object must be checked off OK. 108 00:06:28,530 --> 00:06:34,470 The value of this check checkbox must be off ok must be false. 109 00:06:34,470 --> 00:06:37,400 So let's actually run our project and test our code. 110 00:06:37,500 --> 00:06:38,070 OK. 111 00:06:38,070 --> 00:06:43,810 As you can see now our application is actually running on this emulator here and here. 112 00:06:43,920 --> 00:06:46,430 If you actually check this check box here. 113 00:06:46,470 --> 00:06:49,780 Now as you can see the value of this checkbox is true. 114 00:06:49,950 --> 00:06:50,780 OK. 115 00:06:51,030 --> 00:06:54,710 And if I actually check this checkbox Let's see what happens. 116 00:06:54,750 --> 00:07:02,070 Now as you can see the value of the check box is true and the value of this checkbox checkbox is false. 117 00:07:02,070 --> 00:07:04,350 Let's actually check this check box again. 118 00:07:04,380 --> 00:07:11,310 Now the value of this checkbox is true and the value of box is false. 119 00:07:11,370 --> 00:07:12,820 So hopefully that makes sense. 120 00:07:12,900 --> 00:07:16,380 And let's go back inside this main activity that you have a fight here. 121 00:07:16,440 --> 00:07:18,390 And inside this uncreate Smurfette that is. 122 00:07:18,420 --> 00:07:21,360 Let's actually continue adding some more quotes. 123 00:07:21,360 --> 00:07:26,570 OK now let's actually create a pulley and valuable bullion. 124 00:07:26,760 --> 00:07:27,740 Am I healthy. 125 00:07:29,480 --> 00:07:30,020 OK. 126 00:07:30,230 --> 00:07:36,170 And then I put an assignment operator here and then I can actually assign a value to this variable for 127 00:07:36,170 --> 00:07:37,140 example follows. 128 00:07:37,190 --> 00:07:42,520 Ok so now let's actually create an if statement here. 129 00:07:42,710 --> 00:07:43,190 OK. 130 00:07:43,340 --> 00:07:48,140 So if and then inside Apprentice's I can specify a condition. 131 00:07:48,320 --> 00:07:50,930 So if am I healthy. 132 00:07:51,160 --> 00:07:57,560 OK if am I healthy and then I need to actually open and closed this if statement by using these curly 133 00:07:57,560 --> 00:07:58,320 braces. 134 00:07:58,430 --> 00:08:06,340 So as you can see here inside these are prentices I am actually specifying that if the value of this. 135 00:08:06,560 --> 00:08:12,340 Am I healthy is true then I can actually put my statements inside of this statement. 136 00:08:12,410 --> 00:08:13,490 If the value of this. 137 00:08:13,490 --> 00:08:15,940 Am I healthy boolean value bet is true. 138 00:08:16,010 --> 00:08:20,810 So now you can see the value of this boolean variable is false. 139 00:08:20,810 --> 00:08:21,370 OK. 140 00:08:21,560 --> 00:08:29,780 And here inside Apprentice's of this statement I am specifying that if the value of this am I healthy 141 00:08:29,870 --> 00:08:37,060 boolean value but is true then please execute the lines of code that are inside of this if statement. 142 00:08:37,070 --> 00:08:44,190 So here I can just type in C is X Hellfires that said check it. 143 00:08:44,210 --> 00:08:45,220 True. 144 00:08:45,930 --> 00:08:49,340 OK so now let's actually do an art project and see what happens. 145 00:08:49,340 --> 00:08:49,900 OK. 146 00:08:49,940 --> 00:08:55,070 As you can see here now our application is actually running on this emulator. 147 00:08:55,370 --> 00:08:58,740 And as you can see here none of these checkboxes are checked. 148 00:08:59,000 --> 00:09:03,680 OK because I specified that if the value of this. 149 00:09:03,670 --> 00:09:10,360 Am I healthy valuable is true then execute these lines of code inside the inside this IIF statement. 150 00:09:10,370 --> 00:09:17,630 OK so remember let me actually tell you an important point about a boolean boolean value ability in 151 00:09:17,630 --> 00:09:18,180 Java. 152 00:09:18,560 --> 00:09:25,130 So here as you can see I just referred to the name of this boolean variable and this means that if the 153 00:09:25,130 --> 00:09:29,010 value of this boolean variable is true then execute these lines of code here. 154 00:09:29,020 --> 00:09:29,300 OK. 155 00:09:29,290 --> 00:09:32,820 Now let's actually create an ELSE IF statement here else. 156 00:09:33,080 --> 00:09:38,190 If the value of these are my help is valuable is not true. 157 00:09:38,510 --> 00:09:46,480 OK so I put this exclamation mark here in order to negate the value of this boolean variable. 158 00:09:46,520 --> 00:09:46,950 OK. 159 00:09:47,120 --> 00:09:49,600 So if the value of this. 160 00:09:49,640 --> 00:09:52,910 Am I healthy valuable is not true then it is false. 161 00:09:52,910 --> 00:09:53,370 OK. 162 00:09:53,450 --> 00:09:55,580 So as a result it is false. 163 00:09:55,630 --> 00:10:00,050 Ok then execute the lines of code inside of these curly braces. 164 00:10:00,100 --> 00:10:01,430 See chicks. 165 00:10:01,860 --> 00:10:02,830 Helfen no. 166 00:10:02,880 --> 00:10:06,490 That said checked true. 167 00:10:07,310 --> 00:10:07,740 OK. 168 00:10:07,770 --> 00:10:11,100 And this means check this check box here. 169 00:10:11,170 --> 00:10:12,610 There's no checkbox. 170 00:10:12,750 --> 00:10:15,420 So let's actually run our project and see what happens.