1 00:00:00,480 --> 00:00:08,190 So in order to actually or to import they require classes to our job or Foyles we need to actually click 2 00:00:08,190 --> 00:00:09,650 on this android studio. 3 00:00:09,750 --> 00:00:15,080 If you are using the Android studio on a Windows machine you need to actually click on file and then 4 00:00:15,090 --> 00:00:15,590 settings. 5 00:00:15,620 --> 00:00:23,040 OK so if you are using the Android studio on a Mac or a six unit you click on this android studio and 6 00:00:23,040 --> 00:00:31,740 preferences and then just click on these gentled here and then click on auto gameport and then actually 7 00:00:31,740 --> 00:00:36,860 change this in 0 to imports and paste to all. 8 00:00:37,470 --> 00:00:42,580 And then check these checkboxes here OK and then click on OK. 9 00:00:42,600 --> 00:00:50,190 So as you can see here now are the text of your class is imported to our main activity the java file 10 00:00:50,190 --> 00:00:50,500 here. 11 00:00:50,520 --> 00:00:52,780 As you can see now there is no error. 12 00:00:52,800 --> 00:00:59,860 So now if we want to actually change the text of this text through here will your code. 13 00:01:00,060 --> 00:01:01,420 I just need to type in here. 14 00:01:01,650 --> 00:01:05,760 The one that said text. 15 00:01:05,760 --> 00:01:10,470 And then I can actually put into double quotes and then inside the double quotes I can actually put 16 00:01:10,470 --> 00:01:11,400 in my own text. 17 00:01:11,400 --> 00:01:16,090 For example my own text. 18 00:01:16,160 --> 00:01:17,030 OK. 19 00:01:17,250 --> 00:01:20,680 And if I get on my project now and then I need to actually click on this. 20 00:01:20,700 --> 00:01:21,870 OK here. 21 00:01:21,870 --> 00:01:24,900 So as you can see here it's now going to actually start our application. 22 00:01:24,900 --> 00:01:28,360 OK so as you can see here this is our text my own text. 23 00:01:28,410 --> 00:01:29,000 OK. 24 00:01:29,220 --> 00:01:37,020 So here I actually changed the text of this text through here via java code. 25 00:01:37,120 --> 00:01:37,850 OK. 26 00:01:37,930 --> 00:01:41,770 I guess I managed to successfully change the text of that text view here. 27 00:01:41,790 --> 00:01:42,590 OK. 28 00:01:42,630 --> 00:01:43,320 OK. 29 00:01:43,410 --> 00:01:50,380 Now you want to actually show your and other a predefined class in Java called estrange tokenizer. 30 00:01:50,640 --> 00:01:53,380 So first let me actually put in another text view. 31 00:01:53,460 --> 00:01:55,240 Inside this screen here. 32 00:01:55,290 --> 00:02:03,150 So just drag a large takes you to this screen here and here I need to actually give this text through 33 00:02:03,600 --> 00:02:04,440 an ID. 34 00:02:04,440 --> 00:02:05,010 OK. 35 00:02:05,160 --> 00:02:11,830 So here I can I try to change the ID of these takes you to another value for example the two. 36 00:02:11,920 --> 00:02:12,530 OK. 37 00:02:12,690 --> 00:02:21,060 And now are inside this main activity that Java class I need to actually create another text view object. 38 00:02:21,060 --> 00:02:21,660 OK. 39 00:02:21,960 --> 00:02:26,710 So here I need to refer to the name of the text view class. 40 00:02:26,840 --> 00:02:27,750 OK. 41 00:02:28,380 --> 00:02:33,620 And then again I need to give this object a name t t to. 42 00:02:33,840 --> 00:02:40,910 And then I need to put in an assignment operator here and then I need to put in a pair of round brackets. 43 00:02:41,070 --> 00:02:44,170 And then again I need to refer to the name of the text class. 44 00:02:44,190 --> 00:02:46,690 So as you can see here this is called casting. 45 00:02:46,740 --> 00:02:47,250 OK. 46 00:02:47,280 --> 00:02:52,060 In the next tutorial I'll talk more about casting in Java. 47 00:02:52,290 --> 00:02:58,390 But for now just remember that you need to actually cast this object to text view object. 48 00:02:58,410 --> 00:02:59,060 OK. 49 00:02:59,130 --> 00:03:06,600 And make sure that you actually put this casting here and then we need to actually type in here find 50 00:03:07,890 --> 00:03:19,310 view by id and then inside Apprentice's I need to type in our DOT ID that t t to. 51 00:03:19,700 --> 00:03:20,400 OK. 52 00:03:20,580 --> 00:03:23,590 And then I need to put in a semicolon at the end of my statement. 53 00:03:23,610 --> 00:03:28,670 So now as you can see I created an object from this text to your class. 54 00:03:28,680 --> 00:03:34,210 OK so this is how you actually create an object from this text view class. 55 00:03:34,230 --> 00:03:34,750 OK. 56 00:03:34,950 --> 00:03:41,400 So as you can see here this is how you can actually create an object from this text view class here. 57 00:03:41,400 --> 00:03:50,070 OK so now that I created an object for this test class called T X2 I want to actually show you an other 58 00:03:50,070 --> 00:03:53,600 predefined class in Java called Strange tokenizer. 59 00:03:53,850 --> 00:03:56,270 So first I need to refer to the name of this train. 60 00:03:56,400 --> 00:03:57,760 Tokenizer. 61 00:03:58,080 --> 00:04:01,200 And then I need to give a name to this object. 62 00:04:01,200 --> 00:04:06,480 For example for example Esti are object 1. 63 00:04:06,750 --> 00:04:13,700 And then I need to put in an assignment operator here and then I need to put the new keyboard. 64 00:04:14,190 --> 00:04:17,710 And then again I need to refer to the name of this string tokenizer class. 65 00:04:17,730 --> 00:04:18,270 OK. 66 00:04:18,390 --> 00:04:21,200 And then I need to put in a semi-colon at the end of my statement. 67 00:04:21,330 --> 00:04:25,040 So as you can see here it's now showing us an error as you can see here. 68 00:04:25,330 --> 00:04:29,310 When it's actually passing a string object to this constructor here. 69 00:04:29,360 --> 00:04:33,430 OK so first we need to actually create a string object. 70 00:04:33,440 --> 00:04:38,390 Strange for example as of one. 71 00:04:38,640 --> 00:04:44,360 And then I need to put in an assignment operator and then I can initialize this object for example of 72 00:04:44,370 --> 00:04:46,440 value some value. 73 00:04:46,440 --> 00:04:47,060 OK. 74 00:04:47,310 --> 00:04:49,920 And then I need to put in a semi-colon at the end of my statement. 75 00:04:49,920 --> 00:04:50,480 OK. 76 00:04:50,550 --> 00:04:56,260 So inside this prentices I can just refer to the name of this as the r object here. 77 00:04:56,460 --> 00:05:03,290 And now you want to actually change the value of these textfield here by actually adding some Java codes 78 00:05:03,320 --> 00:05:05,570 inside this main activity that Java fight. 79 00:05:05,570 --> 00:05:06,030 OK. 80 00:05:06,080 --> 00:05:14,400 So first I need to actually be to the name of this object here TXI the two dot said text and then inside 81 00:05:14,400 --> 00:05:17,500 the prentices I can actually put in my own text. 82 00:05:17,630 --> 00:05:24,860 So inside these practices I can just refer to the name of this Esty are object 1. 83 00:05:25,280 --> 00:05:25,770 OK. 84 00:05:25,790 --> 00:05:27,960 Dot next. 85 00:05:28,510 --> 00:05:29,330 OK. 86 00:05:29,720 --> 00:05:33,700 And if I write on my project now let's see what happens. 87 00:05:33,710 --> 00:05:39,680 You can actually check this checkbox here that says Use same device for future launches and then it's 88 00:05:39,680 --> 00:05:44,690 going to actually automatically run your project when whenever you want to run your Android project. 89 00:05:44,690 --> 00:05:46,980 OK I can actually see the result. 90 00:05:47,090 --> 00:05:48,190 OK Sam. 91 00:05:48,500 --> 00:05:52,110 So as you can see here it's now showing us this text here some. 92 00:05:52,120 --> 00:05:54,880 So where is this value here for here. 93 00:05:54,890 --> 00:05:59,130 First of all I actually created another object from this text through class. 94 00:05:59,150 --> 00:05:59,660 OK. 95 00:05:59,780 --> 00:06:03,820 And here I actually created an object from this string class. 96 00:06:03,830 --> 00:06:04,140 OK. 97 00:06:04,140 --> 00:06:08,670 And I actually assigned a value to this string object. 98 00:06:08,690 --> 00:06:09,150 OK. 99 00:06:09,260 --> 00:06:15,860 And here as you can see I actually created an object from this string tokenizer class. 100 00:06:15,980 --> 00:06:20,160 This is string tokenizer class is a predefined class in Java. 101 00:06:20,320 --> 00:06:20,860 OK. 102 00:06:21,050 --> 00:06:22,320 So as you can see here. 103 00:06:22,400 --> 00:06:29,250 First of all I referred to the name of the string tokenizer class and then you gave a name to this object. 104 00:06:29,270 --> 00:06:31,200 Is the R object one. 105 00:06:31,220 --> 00:06:36,550 I actually used this new key word here in order to instantiate this object. 106 00:06:36,740 --> 00:06:42,740 And again I referred to the name of this string tokenizer class and inside Apprentice's I've referred 107 00:06:42,830 --> 00:06:45,400 to the name of this Esti are of one object. 108 00:06:45,410 --> 00:06:45,890 OK. 109 00:06:46,010 --> 00:06:53,390 The constructor of this strange tokenizer class accepts a value of type as 3. 110 00:06:53,420 --> 00:06:53,960 OK. 111 00:06:54,020 --> 00:07:01,170 And here I actually decided to change the text of this t XTi to object as you can see here. 112 00:07:01,490 --> 00:07:05,790 And if I double click on this tab here you can see this text here. 113 00:07:05,840 --> 00:07:06,800 OK. 114 00:07:07,490 --> 00:07:14,240 I actually decided to change the value of that text here and I referred to the the name of this object 115 00:07:14,240 --> 00:07:14,800 here. 116 00:07:15,010 --> 00:07:22,280 Tastee to that set text and inside Apprentice's first of all I referred to the name of this object as 117 00:07:22,280 --> 00:07:25,270 the object one dot next tawkin. 118 00:07:25,430 --> 00:07:25,820 OK. 119 00:07:25,820 --> 00:07:29,680 And it actually outputted this value here. 120 00:07:29,960 --> 00:07:31,610 OK so what's going on here. 121 00:07:31,610 --> 00:07:38,090 They created an object from this as three tokenizer class called Esti are object 1. 122 00:07:38,150 --> 00:07:38,870 OK. 123 00:07:39,260 --> 00:07:47,030 And here I actually instantiated this object by using this new keyboard here and I referred to the name 124 00:07:47,030 --> 00:07:49,020 of this string tokenizer class here. 125 00:07:49,040 --> 00:07:53,570 And I actually passed an argument to this constructor here. 126 00:07:53,600 --> 00:07:57,680 OK so the type of this argument is as strange as you can see here. 127 00:07:57,680 --> 00:07:58,070 OK. 128 00:07:58,100 --> 00:08:04,980 So here this construct here uses the default delimiters which are blank spaces. 129 00:08:05,060 --> 00:08:06,690 Papps new lines. 130 00:08:06,770 --> 00:08:09,950 Carriage returns or forefeet characters. 131 00:08:09,950 --> 00:08:18,540 OK so if any of these characters is contained in this thread and it is used to divide this three in. 132 00:08:18,560 --> 00:08:19,100 OK. 133 00:08:19,160 --> 00:08:22,850 So as you can see here we used this space character here. 134 00:08:22,850 --> 00:08:25,250 OK some space value. 135 00:08:25,490 --> 00:08:26,080 OK. 136 00:08:26,180 --> 00:08:29,790 So that's why you only see this takes some here. 137 00:08:29,840 --> 00:08:30,580 OK. 138 00:08:30,830 --> 00:08:39,980 And if you for example want to change the value of this text here I just need to type in here t XTi 139 00:08:40,100 --> 00:08:45,210 one dot set text and it inside Apprentice's. 140 00:08:45,230 --> 00:08:50,690 I just need to refer it to the name of this is the object one dot next token. 141 00:08:50,990 --> 00:08:54,040 And if I put on my project now let's see what happens. 142 00:08:55,670 --> 00:08:59,950 So as you can say this is our value here are some value. 143 00:09:00,200 --> 00:09:00,720 OK. 144 00:09:00,890 --> 00:09:03,080 So now let me repeat again. 145 00:09:03,230 --> 00:09:09,420 We created an object from this as thrain tokenizer class called Esti are object 1. 146 00:09:09,560 --> 00:09:14,270 And here I instantiated this object by using this new keyboard here. 147 00:09:14,570 --> 00:09:22,790 And here I referred to the name of this string tokenizer class and I passed an argument to this constructor 148 00:09:22,820 --> 00:09:25,430 here and arguments to this constructor here. 149 00:09:25,580 --> 00:09:28,780 So the type of this argument is strange OK. 150 00:09:28,970 --> 00:09:30,300 The are one. 151 00:09:30,430 --> 00:09:30,990 OK. 152 00:09:31,070 --> 00:09:38,620 And here the value of this Esti or one object as you can see is some space value as you can see here. 153 00:09:38,770 --> 00:09:39,370 OK. 154 00:09:39,560 --> 00:09:49,100 So here this constructor here uses the default delimiters which are blank spaces Papps or new lines. 155 00:09:49,100 --> 00:09:49,880 OK. 156 00:09:50,090 --> 00:09:52,790 So as you can see here we have a blank space here. 157 00:09:52,820 --> 00:09:53,200 OK. 158 00:09:53,210 --> 00:09:56,960 So that's why we only see this text here Sam. 159 00:09:57,170 --> 00:09:59,750 And here we see this taste here right. 160 00:09:59,750 --> 00:10:00,420 You ok.