1 00:00:00,690 --> 00:00:02,870 And then we have this do in background. 2 00:00:02,890 --> 00:00:04,340 This is really important. 3 00:00:04,590 --> 00:00:05,120 OK. 4 00:00:05,210 --> 00:00:10,790 Do it do in background so it's going to do the task of downloading data from the internet in the background 5 00:00:10,820 --> 00:00:11,030 it. 6 00:00:11,030 --> 00:00:11,310 OK. 7 00:00:11,310 --> 00:00:17,970 So that's why its name is in background and we have this argument Possum's but I'm sorry as you can 8 00:00:17,970 --> 00:00:27,920 see here at in line at 54 74 as you can see we have actually created an object of type stuff. 9 00:00:27,930 --> 00:00:34,650 So remember that because the output of this class this async class is going to be to use stuff the Smurfette 10 00:00:34,650 --> 00:00:39,120 doing background is going to return an object of type human stuff. 11 00:00:39,120 --> 00:00:45,180 So that's why we actually created an object of type items of stuff inside this method and the name of 12 00:00:45,180 --> 00:00:46,620 this object is iTunes stuff. 13 00:00:46,650 --> 00:00:48,890 Assignment operator new iTunes stuff. 14 00:00:48,900 --> 00:00:51,720 So now I have an object of type items and stuff. 15 00:00:51,960 --> 00:00:59,390 And I actually initialize this object here and in line 75 as you can see I created Avari habit of type 16 00:00:59,390 --> 00:01:04,930 strange an object of types think and the name of this value of the name of this variable is data. 17 00:01:04,950 --> 00:01:07,750 So here I want to actually initialize this data right. 18 00:01:07,770 --> 00:01:14,010 So here I actually created an object of of type items husht TTP client. 19 00:01:14,120 --> 00:01:21,520 So new client here is going to actually create an object of type items typically. 20 00:01:21,570 --> 00:01:21,950 OK. 21 00:01:22,050 --> 00:01:29,300 So here we have an object of type or this class item was likely to be client but get items stuff data. 22 00:01:29,310 --> 00:01:35,060 So remember in inside these items how she typically And here we have this Smurfette get items stuff 23 00:01:35,290 --> 00:01:40,800 up which is actually going on download the data from the Internet is going to connect to the Internet 24 00:01:40,830 --> 00:01:42,840 and then what those data are from the Internet. 25 00:01:43,050 --> 00:01:46,630 So that's the job of the Smif it get iTunes stuff data stream. 26 00:01:46,650 --> 00:01:50,890 But inside this main I keep class I am actually creating an object of type II. 27 00:01:50,900 --> 00:01:54,070 Humes husht stipulate this is actually an object. 28 00:01:54,070 --> 00:01:54,560 OK. 29 00:01:54,810 --> 00:01:58,010 And we are calling the Smurfette which is actually an instance method. 30 00:01:58,050 --> 00:02:00,950 OK this is not and this is actually not static. 31 00:02:01,140 --> 00:02:07,580 So we call this object on our Smurfette we are actually calling this method on an object of type. 32 00:02:07,690 --> 00:02:09,640 ITunes has typically OK. 33 00:02:10,050 --> 00:02:13,980 New items Hashid to be client that get iTunes stuff later. 34 00:02:14,190 --> 00:02:20,010 So its going to get that data and put those data inside this data are valuable here and here we have 35 00:02:20,010 --> 00:02:21,690 this try catch block. 36 00:02:22,170 --> 00:02:24,640 So try to use stuff. 37 00:02:24,690 --> 00:02:26,940 So he had referred to the name of this object. 38 00:02:26,970 --> 00:02:31,480 HUME stuff assignment operator Jason iTunes parser. 39 00:02:31,560 --> 00:02:37,560 So he had referred to the name of this class Jason iTunes part Parsa that I have in my project as you 40 00:02:37,560 --> 00:02:38,290 can see here. 41 00:02:38,490 --> 00:02:41,550 And we have this static method inside our class. 42 00:02:41,600 --> 00:02:43,430 Ok iTunes stuff. 43 00:02:43,680 --> 00:02:45,280 Get the iTunes stuff OK. 44 00:02:45,540 --> 00:02:50,760 So inside this main activity class I referred to the name of this place on iTunes parser class that 45 00:02:50,790 --> 00:02:53,110 get iTunes stuff later. 46 00:02:53,370 --> 00:02:59,460 So we passed this data to that to the Smurfette and then we are actually getting that data and we are 47 00:02:59,490 --> 00:03:02,940 actually putting that we are actually assigning that to the iTunes stuff later. 48 00:03:03,030 --> 00:03:09,390 So remember this method get iTunes stuff here is going to actually turn an object as you can see inside 49 00:03:09,390 --> 00:03:10,940 the states on iTunes sparser. 50 00:03:11,070 --> 00:03:17,310 This method is going to return an object of type iTunes sparser iTunes stuff as you can see here. 51 00:03:17,310 --> 00:03:23,670 So we are here we are actually signing that return value to these items stuff so we can do that because 52 00:03:24,000 --> 00:03:28,680 the Smurfette is going to return an object of type I stuff. 53 00:03:29,070 --> 00:03:33,960 By this argument as you can see here and then we can actually assign that value that returns value to 54 00:03:33,960 --> 00:03:38,400 these items stuff here which is again off of items stuff right. 55 00:03:38,760 --> 00:03:41,180 And some of it is going to actually accept r. 56 00:03:41,220 --> 00:03:47,670 And then its going to actually parse the values the day somebody is from the Internet and then its going 57 00:03:47,670 --> 00:03:49,680 to pretend that iTunes stuff object. 58 00:03:49,980 --> 00:03:52,440 So let's go back to our main activity that of a fight here. 59 00:03:52,440 --> 00:03:57,240 So now we have that data and now we have as you can see here we are actually assigning that data to 60 00:03:57,240 --> 00:03:58,340 these iTunes stuff. 61 00:03:58,620 --> 00:04:03,930 And then we are actually the initialising this I enjoy you Arel that I actually declared in our main 62 00:04:03,930 --> 00:04:07,120 activity class inside our main activity class here. 63 00:04:07,140 --> 00:04:11,850 I actually declared that these items are valuable which is strange. 64 00:04:11,980 --> 00:04:13,070 11:25. 65 00:04:13,260 --> 00:04:19,550 So here in Meffert in doing background I am I am actually instantiating this valuable. 66 00:04:19,740 --> 00:04:22,000 So I am sure you are an assignment operator. 67 00:04:22,120 --> 00:04:23,210 Items stuff. 68 00:04:23,220 --> 00:04:29,400 So here I referred to the name of this object use stuff that get artist view of it. 69 00:04:29,430 --> 00:04:32,890 So here I am actually getting the artist Gidding artist. 70 00:04:33,000 --> 00:04:37,420 You model that you are and that we can actually download from the internet. 71 00:04:37,680 --> 00:04:38,340 Okay. 72 00:04:38,790 --> 00:04:43,620 And here I am actually that you are that is going to actually allow us to download the image from the 73 00:04:43,620 --> 00:04:44,570 Internet right. 74 00:04:44,670 --> 00:04:47,430 And here I am assigning value to these to you all. 75 00:04:47,430 --> 00:04:55,700 So inside is adjacent iTunes of that class as you can see in line 28 I am getting disvalue art artwork 76 00:04:55,830 --> 00:04:58,620 out and 100 here from this artist object. 77 00:04:58,620 --> 00:05:04,440 So inside me an active I am actually signing that you are Ltds I am sure you are OK by calling items 78 00:05:04,500 --> 00:05:06,330 stuff that get artist view it. 79 00:05:06,400 --> 00:05:14,850 OK and that here that we have this I am gdel in line 81 I am instantiating the bitmap object that I 80 00:05:14,850 --> 00:05:18,320 again declared in line 27 inside our main activity class. 81 00:05:18,330 --> 00:05:18,970 OK. 82 00:05:19,200 --> 00:05:22,890 So here I am instantiating the speed map assignment operator. 83 00:05:22,920 --> 00:05:28,160 I actually created an object of type items hash TTP client. 84 00:05:28,440 --> 00:05:28,730 OK. 85 00:05:28,740 --> 00:05:33,710 As you can see here and here as you can see I am actually calling this method on this object. 86 00:05:33,710 --> 00:05:37,110 Get me get bitmapped from u r l i n g u r. 87 00:05:37,230 --> 00:05:42,540 Ok so here we are calling this method that is inside of these items how shitty because we have this 88 00:05:42,540 --> 00:05:43,160 method here. 89 00:05:43,170 --> 00:05:45,960 In order to download the image from the Internet right. 90 00:05:46,020 --> 00:05:51,570 So I just referred to the name of this method he had inside our main activity class and we are calling 91 00:05:51,570 --> 00:05:57,300 that Befort on this object new iTunes Hostettler client and here we are passing this on I am to you 92 00:05:57,300 --> 00:05:58,830 all here. 93 00:05:59,050 --> 00:06:07,090 And now as you can see here Insite is doing background Mefford I am actually using these new items husht 94 00:06:07,100 --> 00:06:09,040 typically in here two times. 95 00:06:09,090 --> 00:06:15,300 I actually I am actually creating this object two times in my method and I think that's not very good. 96 00:06:15,300 --> 00:06:17,700 That's not really good programming practice. 97 00:06:17,790 --> 00:06:23,960 I can actually create an object of type items how shitty the client and assign that object to a valuable 98 00:06:24,270 --> 00:06:26,990 and then I can actually use that valuable. 99 00:06:27,000 --> 00:06:30,340 So here let's actually create an object of type items. 100 00:06:30,340 --> 00:06:35,130 How should it be a client and the name of this object is going to be items how to be client assignment 101 00:06:35,130 --> 00:06:37,500 operator new iTunes. 102 00:06:37,500 --> 00:06:38,440 How typical are you. 103 00:06:38,490 --> 00:06:38,970 OK. 104 00:06:39,120 --> 00:06:41,860 And then I need to put a semicolon at the end of my statement. 105 00:06:41,910 --> 00:06:45,280 So as you can see here I am actually referring to this object. 106 00:06:45,280 --> 00:06:50,510 Look at here I am actually creating an object of type items such a typical. 107 00:06:50,670 --> 00:06:53,150 So I can't delete this piece of code here and there. 108 00:06:53,160 --> 00:06:57,710 I just referred to the name of this object that I created in line 76. 109 00:06:58,010 --> 00:06:58,450 OK. 110 00:06:58,520 --> 00:06:59,680 Items such a typical. 111 00:06:59,710 --> 00:07:04,280 So as you can see here I am actually creating an object of type I human typically. 112 00:07:04,390 --> 00:07:10,440 And I am assigning that value to this object to this object which is of type items I should decline 113 00:07:10,530 --> 00:07:11,360 this valuable. 114 00:07:11,580 --> 00:07:15,960 And now I can actually read through the name of this variable and call this method and again inside 115 00:07:15,960 --> 00:07:22,990 is Triple H as you can see again I am actually creating an order object of type items to shush the typical 116 00:07:22,990 --> 00:07:23,560 diet. 117 00:07:23,850 --> 00:07:31,440 I can actually use this object here is valuable here that I created inline Sixtus 76 so I can just delete 118 00:07:31,470 --> 00:07:35,300 this piece of code here and I can just type in iTunes. 119 00:07:35,310 --> 00:07:40,440 Hashi typically And as you can see here so this is a very good programming practice that I want to show 120 00:07:40,440 --> 00:07:40,840 you. 121 00:07:40,950 --> 00:07:44,450 So we were actually creating two objects of type. 122 00:07:44,500 --> 00:07:45,440 How should he be. 123 00:07:45,450 --> 00:07:51,600 How should he be client and now we have one object and we are using that object here and here in order 124 00:07:51,960 --> 00:07:54,760 to get that data and download the image from the Internet. 125 00:07:54,810 --> 00:08:00,780 So it has to be client that get treatment from you or I am to you are that as you can see here. 126 00:08:01,010 --> 00:08:01,850 OK. 127 00:08:01,950 --> 00:08:06,680 And by passing this I you are and here we are actually downloading that data from the Internet. 128 00:08:06,690 --> 00:08:10,540 And here I am assigning those data to that image to the speed map here. 129 00:08:10,680 --> 00:08:15,150 OK that's the task that is actually being done in the background. 130 00:08:15,270 --> 00:08:17,520 And here we had we have this catch block here. 131 00:08:17,640 --> 00:08:23,430 So in case some errors happen or we can actually we can't actually connect to the Internet. 132 00:08:23,640 --> 00:08:30,000 So it's going to actually put those errors the information about the errors in the log tedious print 133 00:08:30,090 --> 00:08:30,780 stack trace. 134 00:08:30,810 --> 00:08:35,710 And here we are actually returning to the iTunes stuff return iTunes stuff. 135 00:08:35,850 --> 00:08:40,880 So now I am actually returning the iTunes stuff from the Smurfette between background right. 136 00:08:41,310 --> 00:08:43,050 And we have this on post. 137 00:08:43,380 --> 00:08:46,710 So this is going to be executed on them Fred. 138 00:08:46,740 --> 00:08:52,310 So now we can actually get the information that we received as an argument of this on post executive 139 00:08:52,430 --> 00:08:55,740 Meffert and we can put those information on the for. 140 00:08:55,860 --> 00:08:56,960 So Unbossed thinks it cute. 141 00:08:57,000 --> 00:09:02,320 And then here in line one hundred and one you are calling it the supervision of the Smurfit Superlight 142 00:09:02,320 --> 00:09:05,320 on unposed to execute iTunes stuff. 143 00:09:05,460 --> 00:09:11,670 As you can see here and here as you can see I am actually just setting the text of this text the artist 144 00:09:11,670 --> 00:09:17,640 name that said text iTunes stuff that get artist name as you can see here we are actually receiving 145 00:09:17,790 --> 00:09:24,820 iTunes of stuff object as an argument so iTunes stuff that get artist name the type that said text iTunes 146 00:09:24,840 --> 00:09:31,160 stuff that get type the kind that said text iTunes stuff that gets you here. 147 00:09:31,230 --> 00:09:33,010 Excuse me for this get high. 148 00:09:33,030 --> 00:09:33,490 OK. 149 00:09:33,720 --> 00:09:39,900 And here we have this iTunes stuff that get kind the collection name that said takes iTunes stuff that 150 00:09:39,900 --> 00:09:45,020 get collection name takes the tracks name it takes iTunes the stuff that get thrax name. 151 00:09:45,150 --> 00:09:47,650 And it's very simple and straightforward. 152 00:09:47,700 --> 00:09:53,150 I m g r That said the image bitmap bitmap so that this bitmap is actually declared in our main activity 153 00:09:53,160 --> 00:09:57,490 class and in our background if we are actually instantiating this object. 154 00:09:57,750 --> 00:10:02,410 And now in our unput unposed they say you add method which is going to be executed on the UI thread. 155 00:10:02,430 --> 00:10:05,530 After the Smurfette background is going up. 156 00:10:05,550 --> 00:10:07,610 We are actually assigning the speed map to our. 157 00:10:07,620 --> 00:10:09,100 I am art image view. 158 00:10:09,450 --> 00:10:11,330 And here we have this statement. 159 00:10:11,490 --> 00:10:17,180 So when the job is done and we have those information on our user interface here we want to actually 160 00:10:17,190 --> 00:10:18,840 dismiss the progress they like. 161 00:10:18,840 --> 00:10:23,580 So if progress they like that is showing progress they like that dismiss. 162 00:10:23,580 --> 00:10:29,860 So now let's actually as you can see here inside our main activity class let's actually make this bartend 163 00:10:29,890 --> 00:10:33,320 this BT and get the top button or listen into the police of the user. 164 00:10:33,330 --> 00:10:40,830 So BT and get data that said unclick listener and here we need to pass the context. 165 00:10:40,830 --> 00:10:42,290 Main activity that this. 166 00:10:42,390 --> 00:10:47,210 And then we need to actually implement the unclick less than an employee interface in our class. 167 00:10:47,220 --> 00:10:56,370 Main activity then our compact activity implements a view that unclick listener interface. 168 00:10:56,430 --> 00:11:00,330 So we need to actually override the Smurfette in our class. 169 00:11:00,390 --> 00:11:07,080 So now in our class after the ending curly brace of this uncreate method now I when to override that 170 00:11:07,080 --> 00:11:07,470 method. 171 00:11:07,500 --> 00:11:11,550 So here I can just type in unclick as you can see here. 172 00:11:11,820 --> 00:11:14,560 And now I overjoyed that this Mefford uncle is here. 173 00:11:14,610 --> 00:11:15,050 OK. 174 00:11:15,060 --> 00:11:19,680 So when the user clicks on the spot in here this unclick if it is going to be executed. 175 00:11:19,890 --> 00:11:25,650 So now I need to actually I just need to create an object of type Dasent iTunes stuff task as you can 176 00:11:25,650 --> 00:11:28,820 see here on iTunes stuff task. 177 00:11:28,870 --> 00:11:29,400 OK. 178 00:11:29,640 --> 00:11:36,060 And the name of this object is going to be based on iTunes stuff task assignment operator new Jason 179 00:11:36,510 --> 00:11:37,930 right stuff test. 180 00:11:38,010 --> 00:11:43,200 And here we need to pass the context and activity that this main activity that this is going to be the 181 00:11:43,200 --> 00:11:46,690 context and I need to put a semicolon at the end of my statement. 182 00:11:46,710 --> 00:11:51,960 So as you can see here in say the constructor of the states on items stuff passed I actually created 183 00:11:51,960 --> 00:11:58,020 a constructor that can accept a context or an object of type context and that's why we need to pass 184 00:11:58,020 --> 00:12:04,480 this main activity that this context here as an argument of this kind of structure here for this class 185 00:12:04,500 --> 00:12:06,130 it's on iTunes stuff task. 186 00:12:06,510 --> 00:12:13,620 And here I just need to type in Dasen items stuff task that executes and then I need to put a semicolon 187 00:12:13,650 --> 00:12:14,980 at the end of my statement. 188 00:12:15,210 --> 00:12:19,400 So now let's run our project and see what happens. 189 00:12:19,440 --> 00:12:23,770 So now as you can see our application is running on this emulator. 190 00:12:23,820 --> 00:12:27,860 So now let's actually click on this button here to get the data and data from the Internet. 191 00:12:28,150 --> 00:12:30,690 And now as you can see it we cannot actually see those data. 192 00:12:30,690 --> 00:12:32,560 We cannot get the data from the Internet. 193 00:12:32,640 --> 00:12:39,570 So there is an error in our project and the and the error is inside of this manifest file and it manifests 194 00:12:39,570 --> 00:12:40,530 that example. 195 00:12:40,680 --> 00:12:44,430 And inside this manifest tag here we need to actually put our permission. 196 00:12:44,580 --> 00:12:51,020 So just open a tag and just type in users permission and we need to actually get the internet permission. 197 00:12:51,240 --> 00:12:53,210 And then I need to close this tag here. 198 00:12:53,250 --> 00:12:56,620 This line of code here is very important to me to get the internet permission. 199 00:12:56,910 --> 00:12:59,400 So let's actually run our project again. 200 00:12:59,850 --> 00:13:03,320 So now as you can see our application is running on this emulator. 201 00:13:03,360 --> 00:13:07,800 So let's actually click on this button here and now we have this progress. 202 00:13:07,910 --> 00:13:10,110 Like downloading info from the Internet. 203 00:13:10,500 --> 00:13:13,920 And as you can see here we can see these data type tracks. 204 00:13:14,010 --> 00:13:21,330 As you can see here artist named Michael Jackson collection and the essential Michael Jackson and name 205 00:13:21,330 --> 00:13:23,430 is disvalue P. whitey. 206 00:13:23,490 --> 00:13:26,130 Pretty clean and kind son. 207 00:13:26,250 --> 00:13:29,120 And this is the image that we actually downloaded from the Internet. 208 00:13:29,310 --> 00:13:30,130 OK. 209 00:13:30,240 --> 00:13:34,970 And now we can see that our button is actually disappeared. 210 00:13:35,010 --> 00:13:37,850 So we need to go back to an activity Underland minute example here. 211 00:13:37,860 --> 00:13:39,060 So here I have this error. 212 00:13:39,060 --> 00:13:44,700 I just need to click on this clear cache and it's actually double click on this activity Underland minute 213 00:13:44,720 --> 00:13:49,110 Exuma tap here in order to make this a user interface area wider. 214 00:13:49,560 --> 00:13:56,530 So now I can actually for example select this image view here and assign the value of one hundred. 215 00:13:56,530 --> 00:14:03,280 Here I can just assign the value of 100 for the lay out feet and 100 for the layout height. 216 00:14:03,420 --> 00:14:04,610 OK. 217 00:14:05,550 --> 00:14:07,810 So let's actually Iran our project again. 218 00:14:07,920 --> 00:14:12,590 So again it's actually kind of spot in here and this is our progress dialog. 219 00:14:12,600 --> 00:14:16,500 And now as you can see the information is actually downloaded from the Internet. 220 00:14:16,680 --> 00:14:17,610 OK. 221 00:14:18,180 --> 00:14:24,740 So hopefully that makes sense and I'll make sure that you actually practice on the skills that are hard 222 00:14:24,750 --> 00:14:26,820 for you in this application. 223 00:14:26,820 --> 00:14:32,040 This is really important that you become a master in actually getting the adjacent data from the Internet. 224 00:14:32,040 --> 00:14:38,700 This is a very important concept in Android and if you have any questions about Jason about these concepts 225 00:14:38,700 --> 00:14:43,470 that I taught you in this lesson please post the discussion in the course and let me know about those 226 00:14:43,470 --> 00:14:48,220 problems and I'll do my best to answer all of your questions. 227 00:14:48,250 --> 00:14:50,250 So thank you very much for watching. 228 00:14:50,340 --> 00:14:52,590 And I'll see you in the next tutorial.