1 00:00:00,390 --> 00:00:07,300 Help everyone in this theater you are really going to go ahead and create our 18th Android application. 2 00:00:07,560 --> 00:00:08,520 So just click on this. 3 00:00:08,550 --> 00:00:16,650 Start any new Android do your project for the application name just type in here app 18 and you can 4 00:00:16,800 --> 00:00:22,470 actually specify the company domain package name and project location and then click on next. 5 00:00:22,500 --> 00:00:28,220 And here you need to actually specify the API 16 Android 4.1 jelly bean. 6 00:00:28,260 --> 00:00:33,390 And then click on Next choose plant activity next. 7 00:00:33,720 --> 00:00:40,320 And then here you can actually specify a name for the activity name lay out name title and many resource 8 00:00:40,320 --> 00:00:40,770 name. 9 00:00:40,890 --> 00:00:47,760 So I suggest that you actually leave these names as default and then click on finish ok everyone. 10 00:00:47,760 --> 00:00:53,720 Now let's actually select this hello world takes you here and then press on delete key on your keyboard. 11 00:00:53,730 --> 00:00:56,250 Let's actually go inside this red folder here. 12 00:00:56,550 --> 00:01:03,110 And inside the layout folder double click on this activity underline made that example and then select 13 00:01:03,110 --> 00:01:06,140 is filleting action but press on delete key on your keyboard. 14 00:01:06,150 --> 00:01:06,990 OK. 15 00:01:06,990 --> 00:01:10,350 So let's go back inside this content underline made that example. 16 00:01:10,350 --> 00:01:15,060 And now I when I actually design my user interface for this application. 17 00:01:15,180 --> 00:01:22,230 So just select this linearly vertical here and then put it here at the center of this relatively OK. 18 00:01:22,620 --> 00:01:26,530 And then let's actually select our scroll view here. 19 00:01:26,580 --> 00:01:29,700 So as you can see here inside these containers fall there. 20 00:01:29,810 --> 00:01:30,370 OK. 21 00:01:30,690 --> 00:01:36,840 Select the scroll you vertical as you can see and then put it inside this linearly out vertical here. 22 00:01:36,840 --> 00:01:39,540 OK so now let's actually to select a text field. 23 00:01:39,600 --> 00:01:40,020 OK. 24 00:01:40,050 --> 00:01:44,080 As you can see this is a text field here inside these text fields folder. 25 00:01:44,240 --> 00:01:44,740 OK. 26 00:01:44,790 --> 00:01:47,430 And then put it inside this scroll view here. 27 00:01:47,490 --> 00:01:54,240 OK so now let's actually find the the id attribute 40s edit text textfield here. 28 00:01:54,240 --> 00:01:54,690 OK. 29 00:01:54,810 --> 00:01:59,250 So as you can see here this is the id attribute of this text here. 30 00:01:59,280 --> 00:02:07,910 And this actually assign the value EDT puzzle for the idea of these Eadie takes here. 31 00:02:07,920 --> 00:02:08,960 OK. 32 00:02:09,720 --> 00:02:14,640 And as you can see here now the design of our user interface is actually finished. 33 00:02:15,000 --> 00:02:18,740 So now let's actually go back and say this me an activity dojo over here. 34 00:02:18,900 --> 00:02:24,000 Let's actually delete these lines of code and then let's actually delete this block of code that is 35 00:02:24,000 --> 00:02:25,990 actually related to the floating action. 36 00:02:25,990 --> 00:02:26,760 But OK. 37 00:02:26,970 --> 00:02:30,220 And now we can actually start coding here. 38 00:02:30,270 --> 00:02:33,730 So now let's actually create a class a Java class. 39 00:02:33,810 --> 00:02:34,320 OK. 40 00:02:34,410 --> 00:02:40,280 So just click on this file here new and then click on this Java class here. 41 00:02:40,290 --> 00:02:40,930 OK. 42 00:02:41,250 --> 00:02:46,590 And for the class name just type in here Company and device 43 00:02:49,720 --> 00:02:50,240 OK. 44 00:02:50,400 --> 00:02:52,690 And then click on OK here. 45 00:02:52,770 --> 00:02:56,970 So as you can see here we have a class called Company and device in our project. 46 00:02:56,970 --> 00:02:57,230 OK. 47 00:02:57,240 --> 00:03:02,180 So let's just click on this view here tool windows and then project. 48 00:03:02,490 --> 00:03:09,110 And here we can see inside this Java folder and inside this folder here we can see our class here. 49 00:03:09,120 --> 00:03:09,650 OK. 50 00:03:09,840 --> 00:03:11,160 Inside this package. 51 00:03:11,190 --> 00:03:16,230 So let's go back inside this company and device class and inside of this class let's actually create 52 00:03:16,260 --> 00:03:18,510 two constants of type stream. 53 00:03:18,540 --> 00:03:19,160 OK. 54 00:03:19,470 --> 00:03:26,100 So first of all I want to actually specify the axis modifier of my constants so the axis modifier of 55 00:03:26,100 --> 00:03:32,010 my constant is private and are here because I want to actually create a constant. 56 00:03:32,040 --> 00:03:39,030 I need to put the final keyword here and then I need to specify the type of my consonant and then I 57 00:03:39,030 --> 00:03:41,340 need to actually specify a name for my constant. 58 00:03:41,340 --> 00:03:45,940 OK so a company underline name. 59 00:03:46,650 --> 00:03:47,630 OK. 60 00:03:48,240 --> 00:03:55,590 Again I want to actually create another constant private final string. 61 00:03:56,250 --> 00:04:04,630 And this time the name of our constant is company device company on the line device. 62 00:04:05,290 --> 00:04:05,970 OK. 63 00:04:06,550 --> 00:04:09,190 So now as you can see it is now showing us an error. 64 00:04:09,300 --> 00:04:16,320 So because we didn't actually instantiate these objects we need to actually create a constructor here 65 00:04:16,350 --> 00:04:21,350 in order to instantiate these objects inside the constructor for this class. 66 00:04:21,390 --> 00:04:22,780 So I just need to type in here. 67 00:04:22,800 --> 00:04:24,700 So I just need to type in here public. 68 00:04:25,000 --> 00:04:32,280 So the access modified of my constructor is public and I need to actually refer to the name of this 69 00:04:32,280 --> 00:04:32,960 class. 70 00:04:32,970 --> 00:04:38,670 Remember that the constructor name must be the same as the name of the class. 71 00:04:38,690 --> 00:04:43,920 Ok so here I just copy this name and then I just put it here. 72 00:04:44,010 --> 00:04:50,430 Company and device and then here I want to actually specify that this class is going to actually accept 73 00:04:50,490 --> 00:04:51,550 arguments. 74 00:04:51,570 --> 00:04:59,500 So the first argument is of type strange and the name of my argument is company name. 75 00:05:00,120 --> 00:05:02,380 OK come on. 76 00:05:02,390 --> 00:05:06,000 Again the later type of my second argument is against stream. 77 00:05:06,240 --> 00:05:10,690 And the name of my argument is company device. 78 00:05:10,860 --> 00:05:11,690 OK. 79 00:05:12,180 --> 00:05:18,270 And then I need to open and close this constructor by using these curly braces. 80 00:05:18,360 --> 00:05:22,440 So inside of this constructor I want to instantiate these objects. 81 00:05:22,830 --> 00:05:24,760 So I just need to type in here this. 82 00:05:25,100 --> 00:05:26,010 OK. 83 00:05:26,220 --> 00:05:33,000 So as you can see this keyboard actually refers to the specific object that is actually created from 84 00:05:33,000 --> 00:05:33,760 this class. 85 00:05:33,870 --> 00:05:34,320 OK. 86 00:05:34,320 --> 00:05:39,660 Whenever we actually refer to this this refers to the specific object that is actually related to this 87 00:05:39,660 --> 00:05:40,620 class. 88 00:05:40,640 --> 00:05:44,590 OK so does that company name. 89 00:05:44,820 --> 00:05:49,220 OK so here we are just referring to this actually object here. 90 00:05:49,230 --> 00:05:49,600 OK. 91 00:05:49,650 --> 00:05:54,840 And here I just need to put in an assignment operator here and here I want to refer to the name of this 92 00:05:54,840 --> 00:05:57,000 argument company name. 93 00:05:57,260 --> 00:05:58,360 Semicolon. 94 00:05:59,220 --> 00:06:07,200 So again does that company device assignment operator company device. 95 00:06:07,550 --> 00:06:13,680 OK semicolon this piece of code as you can see refers to this instance variable here. 96 00:06:14,040 --> 00:06:17,730 And this piece of code refers to disparate instance variable. 97 00:06:17,970 --> 00:06:23,250 And here as you can see it is company name here refers to this argument and this company device here 98 00:06:23,580 --> 00:06:25,890 refers to this argument here. 99 00:06:25,890 --> 00:06:26,610 OK. 100 00:06:27,030 --> 00:06:28,830 So hopefully that makes sense. 101 00:06:29,040 --> 00:06:35,430 And let's actually overwrite the two string method that you actually inherit implicitly flop from the 102 00:06:35,430 --> 00:06:36,700 object class. 103 00:06:36,720 --> 00:06:44,340 Remember that all classes in Java are by default inherit all the features and behaviors inside the object 104 00:06:44,340 --> 00:06:44,650 class. 105 00:06:44,670 --> 00:06:49,910 Ok so I just need to type in here too strange as you can see this is the method. 106 00:06:50,070 --> 00:06:52,660 And this if it is inside the object class OK. 107 00:06:52,740 --> 00:06:58,260 And then I just need to present Enter key on your on my keyboard and here we can actually overwrite 108 00:06:58,560 --> 00:06:59,270 the Smurfette. 109 00:06:59,340 --> 00:06:59,820 OK. 110 00:06:59,910 --> 00:07:06,890 So I just need to delete this line of code here and we can actually put in our own implementations inside 111 00:07:06,900 --> 00:07:08,060 of this to stream of it. 112 00:07:08,090 --> 00:07:11,710 OK so I just need to type in here return and here. 113 00:07:11,790 --> 00:07:18,410 I just want to put in OK two double quotes space plus company device. 114 00:07:19,080 --> 00:07:19,920 OK. 115 00:07:20,160 --> 00:07:29,000 Plus two double quotes space from space plus company name. 116 00:07:29,770 --> 00:07:30,380 OK. 117 00:07:30,570 --> 00:07:37,640 Plus And again let me ask you to create a new line here in order to show you what's going on here. 118 00:07:37,650 --> 00:07:38,840 Two double quotes. 119 00:07:38,910 --> 00:07:47,910 Space Company space plus two double quotes and inserted double quotes. 120 00:07:47,910 --> 00:07:55,110 I just want to put in a thought here space and here I just want to create free new line characters so 121 00:07:55,110 --> 00:07:58,760 back for Slash and backwards slash and and backward slash. 122 00:07:58,770 --> 00:08:02,820 And so here I just created free new Live characters here. 123 00:08:02,820 --> 00:08:03,440 OK. 124 00:08:03,720 --> 00:08:09,670 I just put in free new line characters and then I just need to put in a semicolon at the end of my statement. 125 00:08:09,690 --> 00:08:13,360 This is the two string method that is actually related to this class. 126 00:08:13,380 --> 00:08:18,630 So when ever that actually creates an object from this class the thing Meffert that is related to that 127 00:08:18,630 --> 00:08:20,540 specific object of this class. 128 00:08:20,580 --> 00:08:25,980 This is going to be called this piece of code here is going to be executed here. 129 00:08:26,040 --> 00:08:26,530 OK. 130 00:08:26,670 --> 00:08:28,580 So hopefully that makes sense. 131 00:08:28,740 --> 00:08:38,740 And now lets actually create another class OK file new double class and the name of our class is puzzle. 132 00:08:40,110 --> 00:08:42,990 And then click on OK here. 133 00:08:42,990 --> 00:08:45,950 So as you can see here this is our puzzle class. 134 00:08:46,220 --> 00:08:50,570 OK now let's actually put some codes inside of this puzzle class. 135 00:08:50,610 --> 00:08:58,660 So just typing here Private First of all we are actually specifying the access modifier of our valuable. 136 00:08:58,730 --> 00:08:59,360 OK. 137 00:08:59,670 --> 00:09:05,040 And here I want to actually create an array of type company and device class. 138 00:09:05,040 --> 00:09:05,380 OK. 139 00:09:05,430 --> 00:09:08,140 As you can see this is our class company and device. 140 00:09:08,250 --> 00:09:14,100 And inside of this puzzle class I want to create an array of type company and device. 141 00:09:14,140 --> 00:09:14,600 OK. 142 00:09:14,880 --> 00:09:18,750 So I just need to refer to the name of my type company and device. 143 00:09:18,840 --> 00:09:19,580 Okay. 144 00:09:19,920 --> 00:09:25,130 And then here I want to specify that I want to actually create an array here. 145 00:09:25,260 --> 00:09:29,040 So I just need to put in a pair of brackets after my type name. 146 00:09:29,430 --> 00:09:39,600 And here I want to actually give a name to my arii so the name of my Arey is companies and devices and 147 00:09:39,630 --> 00:09:41,850 semicolon at the end of my statement. 148 00:09:41,850 --> 00:09:48,810 So as you can see here I didn't instantiate this Auret because I just wanted to declare this right here 149 00:09:49,410 --> 00:09:53,260 and here let's actually declare another variable of type integer. 150 00:09:53,340 --> 00:10:00,030 OK so first of all we need to actually specify the access modifier of our valuable private ain't the 151 00:10:00,030 --> 00:10:02,280 data type of the above is it. 152 00:10:02,310 --> 00:10:13,080 And here I want to specify the name of my variable current device model OK and put a semicolon at the 153 00:10:13,080 --> 00:10:14,170 end of your statement.