1 00:00:00,290 --> 00:00:06,260 Hire everyone in this theater really you're going to go ahead and create R12 Android application. 2 00:00:06,270 --> 00:00:10,080 So first we need to actually click on these stars and your Android studio project. 3 00:00:10,080 --> 00:00:15,080 And here we need to actually specify a name for our application of 12. 4 00:00:15,420 --> 00:00:21,900 And then here you can actually specify a company domain package name and a project location for your 5 00:00:22,050 --> 00:00:24,900 project and then click on next here. 6 00:00:25,000 --> 00:00:30,740 Choose Apr. 16 Android 4.1 Jelly Bean and iPhone and tablets. 7 00:00:30,750 --> 00:00:31,370 Okay. 8 00:00:31,830 --> 00:00:35,770 And then next to choose plant activity next. 9 00:00:36,010 --> 00:00:37,920 And here don't change anything. 10 00:00:37,950 --> 00:00:39,210 And then click on finish. 11 00:00:39,330 --> 00:00:42,060 So here are the latest this hellova or text view. 12 00:00:42,150 --> 00:00:42,700 OK. 13 00:00:42,960 --> 00:00:48,900 And then double clicking on this arrest folder here and then double click on this layout folder and 14 00:00:48,900 --> 00:00:51,630 then double click on this activity made that example. 15 00:00:51,780 --> 00:00:54,870 And then here to this floating action button. 16 00:00:54,870 --> 00:00:58,450 And then let's go back and say this content underline made that example. 17 00:00:58,560 --> 00:01:04,100 And here it's actually it's actually dragging a linearly out of vertical. 18 00:01:04,100 --> 00:01:09,210 Inside this linear inside this relatively out here at the center of the screen. 19 00:01:09,240 --> 00:01:09,950 OK. 20 00:01:10,200 --> 00:01:17,520 And then let's actually write a linearly out horizontal inside these linearly out of vertical and here 21 00:01:17,940 --> 00:01:24,380 let's actually write our large text view into this linearly or horizontal double click on it. 22 00:01:24,660 --> 00:01:27,460 And for the text just type in here index. 23 00:01:28,020 --> 00:01:28,650 OK. 24 00:01:28,920 --> 00:01:35,940 And let's actually write another text view into this linearly out horizontal and double click on it. 25 00:01:35,940 --> 00:01:39,150 And for the text just they've been here right to you. 26 00:01:39,540 --> 00:01:47,850 And as you can see here I didn't assign any ID to both of these text views because I don't want to interact 27 00:01:48,120 --> 00:01:49,100 with these text. 28 00:01:49,150 --> 00:01:50,510 And from my java code. 29 00:01:50,550 --> 00:01:51,010 OK. 30 00:01:51,090 --> 00:01:53,210 I just want these text to be here. 31 00:01:53,340 --> 00:02:01,170 Click on this first text view here and then for the Left Feet assign the values 0 and then as you can 32 00:02:01,170 --> 00:02:04,090 see here we've got to wait here. 33 00:02:04,110 --> 00:02:04,730 OK. 34 00:02:04,800 --> 00:02:08,830 So for the lay out of 8 just assign the values 0.5. 35 00:02:09,020 --> 00:02:09,520 OK. 36 00:02:09,570 --> 00:02:16,050 So here as you can see I assumed that the Veith of these are linearly Hollys on toward each one. 37 00:02:16,200 --> 00:02:24,240 And then I actually assigned the value 0 for the layout of each of these text you and I assigned the 38 00:02:24,240 --> 00:02:27,750 value 0.5 to the lay out rate of this. 39 00:02:27,750 --> 00:02:28,570 I take you here. 40 00:02:28,590 --> 00:02:29,060 OK. 41 00:02:29,130 --> 00:02:36,270 Let's actually click on these other takes you here again for the layout we assign the value 0 and then 42 00:02:36,270 --> 00:02:41,140 for the Left wait assigned a value 0.5. 43 00:02:41,160 --> 00:02:42,340 So as you can see here. 44 00:02:42,360 --> 00:02:46,210 So these two textbooks are actually reading this linearly horizontal. 45 00:02:46,270 --> 00:02:46,690 OK. 46 00:02:46,710 --> 00:02:53,250 These two text views are actually taking a half of the V of this linearly out horizontal OK as you can 47 00:02:53,250 --> 00:02:53,900 see here. 48 00:02:54,180 --> 00:02:58,360 I assigned the value 0 to both of these takes views. 49 00:02:58,600 --> 00:03:07,450 OK for the left and I assigned a value 0.5 to both of these two they lay out the weight of these tissues 50 00:03:07,470 --> 00:03:07,740 here. 51 00:03:07,740 --> 00:03:08,230 OK. 52 00:03:08,280 --> 00:03:13,720 These textbooks are going to actually take only a half of the Viets of these linearly out horizontal. 53 00:03:13,800 --> 00:03:15,390 So hopefully that makes sense. 54 00:03:15,390 --> 00:03:21,830 So now let's actually track a linearly out horizontal into this linearly outwards to Clokey and below 55 00:03:21,860 --> 00:03:24,280 these linearly out horizontal here. 56 00:03:24,280 --> 00:03:25,080 Okay. 57 00:03:25,560 --> 00:03:28,550 And as you can see here this is our linearly or horizontal. 58 00:03:28,710 --> 00:03:35,340 So now I want to actually put a linearly out vertical into these linearly or horizontal OK. 59 00:03:35,520 --> 00:03:41,360 And let's actually like another linearly out whereas they call this linearly out horizontal. 60 00:03:41,750 --> 00:03:48,480 OK so now I want to actually select this first linearly out of vertical here as you can see inside this 61 00:03:48,480 --> 00:03:54,730 component 3 section and for the layout of it which again assigned values 0. 62 00:03:54,960 --> 00:03:56,240 OK. 63 00:03:57,090 --> 00:04:01,600 And then for the layout weight assigned values 0.5. 64 00:04:01,890 --> 00:04:02,580 OK. 65 00:04:02,850 --> 00:04:09,370 Again select this segment are linearly elsewhere the call for the out we assign the value 0. 66 00:04:09,510 --> 00:04:10,590 And for the lay out. 67 00:04:10,600 --> 00:04:11,960 Wait wait. 68 00:04:11,960 --> 00:04:14,190 I assigned a value 0.5. 69 00:04:14,250 --> 00:04:20,280 So as you can see here these two are linear layouts are actually taking a half of the width of these 70 00:04:20,580 --> 00:04:22,730 linearly out horizontal Okay. 71 00:04:22,740 --> 00:04:29,860 So as you can see here I actually assumed that each of these lean linearly horizontally is 1 or 100. 72 00:04:29,940 --> 00:04:36,240 And then these two takes views are going to actually take only half of that space half of the weight 73 00:04:36,300 --> 00:04:38,180 of these linearly held horizontally. 74 00:04:38,190 --> 00:04:42,350 Half of the Viets of this linearly out horizontal as you can see here. 75 00:04:42,480 --> 00:04:46,940 So I assigned the value 0.5 to the length weight of these two takes views. 76 00:04:46,950 --> 00:04:48,320 So hopefully that makes sense. 77 00:04:48,390 --> 00:04:55,350 OK now let's actually drag a large takes you into these first linearly alphabetical that is inside of 78 00:04:55,350 --> 00:04:57,130 these linearly or horizontal. 79 00:04:57,130 --> 00:04:57,420 OK. 80 00:04:57,450 --> 00:05:02,350 So you can actually put it here as you can see and double click on this text view. 81 00:05:02,370 --> 00:05:08,010 And let's actually delete the text of this text view for the ID just type anti-X the index. 82 00:05:08,170 --> 00:05:09,410 OK that's actually right. 83 00:05:09,460 --> 00:05:16,660 And on the large takes you into this segment linearly vertical that is actually inside of this linearly 84 00:05:16,660 --> 00:05:17,840 or horizontal OK. 85 00:05:18,040 --> 00:05:21,690 So just put it here as you can see inside this component section. 86 00:05:21,700 --> 00:05:28,120 So I did a mistake and I didn't actually put this linear takes you inside of these linearly or vertical. 87 00:05:28,120 --> 00:05:32,670 So I can just drag it inside these linearly out vertical. 88 00:05:33,040 --> 00:05:33,700 OK. 89 00:05:34,000 --> 00:05:39,910 So double click on the sixth view and delete it to take the text of this text you and for the ID just 90 00:05:39,910 --> 00:05:44,320 type in here anti-X the value OK. 91 00:05:44,750 --> 00:05:50,570 So now let's actually go back and say this main activity that a file and you can just tap in order to 92 00:05:50,570 --> 00:05:52,350 make this editor area wider. 93 00:05:52,460 --> 00:05:53,380 OK. 94 00:05:53,470 --> 00:05:57,680 And these are lines of code that are actually related to the Options menu. 95 00:05:57,980 --> 00:06:01,180 And here the latest line of code and this curly brace. 96 00:06:01,190 --> 00:06:01,880 OK. 97 00:06:02,270 --> 00:06:08,620 And here are the latest block of code that is actually related to the flat to the floating action button. 98 00:06:08,920 --> 00:06:12,560 Ok so now we can actually put our own codes here. 99 00:06:12,560 --> 00:06:17,110 So in this tutorial and in this application I want to talk about areas in Java. 100 00:06:17,210 --> 00:06:20,720 OK Java provides a data structure. 101 00:06:20,720 --> 00:06:27,750 The tree which stores a fixed size or sequential collection of elements of the same type. 102 00:06:27,850 --> 00:06:35,710 OK so we can actually put some elements that are actually of the same type in one place and we can refer 103 00:06:35,720 --> 00:06:36,260 to them. 104 00:06:36,260 --> 00:06:41,780 So for example imagine that you want to actually create a hundred integer value Burleigh's if you want 105 00:06:41,780 --> 00:06:42,700 to create that. 106 00:06:42,740 --> 00:06:45,440 I can't just type in here ain't number one. 107 00:06:45,500 --> 00:06:49,170 For example number 1 and so on and not to. 108 00:06:49,310 --> 00:06:50,710 For example number two. 109 00:06:50,960 --> 00:06:52,980 And so on this is the wrong way. 110 00:06:53,090 --> 00:07:00,240 OK if I want to create a hundred integer numbers or if I want to create 100 into Gerardia else and if 111 00:07:00,240 --> 00:07:09,260 I want to refer to those values I can just create an array and store those 100 values of integer values 112 00:07:09,320 --> 00:07:10,270 in that area. 113 00:07:10,390 --> 00:07:10,810 OK. 114 00:07:10,880 --> 00:07:18,980 Arrays only store are actually a fixed size sequential collection of elements of the same type K. 115 00:07:19,280 --> 00:07:22,280 So an array is used to store a collection of data. 116 00:07:22,340 --> 00:07:25,600 Let's actually create some examples and then it will make sense to you. 117 00:07:25,610 --> 00:07:26,130 OK. 118 00:07:26,480 --> 00:07:30,620 So for example I want to actually create an array of integers. 119 00:07:30,630 --> 00:07:31,430 OK. 120 00:07:32,010 --> 00:07:32,610 OK. 121 00:07:32,900 --> 00:07:37,850 And then I need to actually putting in a pair of brackets as you can see after this type. 122 00:07:37,850 --> 00:07:41,680 So first of all I actually specify the type of my at a integer. 123 00:07:41,750 --> 00:07:42,340 OK. 124 00:07:42,470 --> 00:07:46,510 So this arrow is going to actually accept integer numbers only. 125 00:07:46,690 --> 00:07:47,130 OK. 126 00:07:47,330 --> 00:07:54,830 And here I actually put in a pair of brackets here to specify that I am going to actually create an 127 00:07:54,860 --> 00:07:56,050 array object. 128 00:07:56,230 --> 00:07:56,700 OK. 129 00:07:56,810 --> 00:08:03,920 And here I need to actually specify a name for our heavy for example integer numbers. 130 00:08:04,580 --> 00:08:06,860 OK this is the name of my arii. 131 00:08:07,040 --> 00:08:07,710 OK. 132 00:08:08,060 --> 00:08:14,140 And here I need to actually put in an assignment operator here Miyu. 133 00:08:14,540 --> 00:08:17,200 OK so I want to actually instantiate that this way. 134 00:08:17,210 --> 00:08:17,690 OK. 135 00:08:17,810 --> 00:08:19,760 By using this new keyboard. 136 00:08:19,760 --> 00:08:25,570 And then again I need to refer to the type of my Arey end and here as you can see again I'm putting 137 00:08:25,570 --> 00:08:31,910 in a pair of brackets here and inside of these brackets I need to actually specify what would be the 138 00:08:31,910 --> 00:08:34,100 size of my Arey OK. 139 00:08:34,220 --> 00:08:38,810 So for example I want to actually create array of 100 numbers. 140 00:08:38,840 --> 00:08:39,250 OK. 141 00:08:39,350 --> 00:08:45,060 So I wanted this array to actually accept a hundred integer numbers. 142 00:08:45,080 --> 00:08:47,360 So here I can actually specify that size. 143 00:08:47,450 --> 00:08:53,620 So now as you can see here we just created an array and instantiated this array. 144 00:08:53,720 --> 00:08:59,150 OK but we didn't assign any value to the indexes of this alley. 145 00:08:59,270 --> 00:09:07,610 We just here specify that this a is going to have actually a hundred places a hundred empty places for 146 00:09:07,670 --> 00:09:08,700 integer numbers. 147 00:09:08,870 --> 00:09:11,980 But we didn't assign any value to those places yet. 148 00:09:11,990 --> 00:09:15,320 So now we want to actually assign some values to these arrays. 149 00:09:15,380 --> 00:09:19,420 So remember in programming we actually count from number 0. 150 00:09:19,640 --> 00:09:21,110 OK so this is very important. 151 00:09:21,110 --> 00:09:22,910 Now I want to actually assign. 152 00:09:22,910 --> 00:09:28,760 I want to actually assign a value to the index zero of these very first of all in order to assign a 153 00:09:28,760 --> 00:09:30,830 value to the index zero of this array. 154 00:09:30,830 --> 00:09:35,370 First of what I need to actually refer to the name of this array integer numbers. 155 00:09:35,730 --> 00:09:36,570 OK. 156 00:09:36,810 --> 00:09:38,550 Brackets are paramount brackets. 157 00:09:38,570 --> 00:09:44,590 And here I need to actually specify the index that you want to actually specify a value to it. 158 00:09:44,600 --> 00:09:45,000 OK. 159 00:09:45,110 --> 00:09:51,110 For example index 0 and here I need to actually putting an assignment operator again. 160 00:09:51,260 --> 00:09:56,340 For example I want to assign the value of twenty four to the index zero of this area. 161 00:09:56,390 --> 00:09:56,790 OK.