1 00:00:00,840 --> 00:00:06,750 Welcome back in this video, we're going to add the permission for the external stories, so we want 2 00:00:06,750 --> 00:00:11,580 to read the external storage once we click on this button, this gallery button and then we want to 3 00:00:11,580 --> 00:00:15,090 select an item or an image from the gallery. 4 00:00:15,270 --> 00:00:19,080 And in order to do that, we of course need to, first of all, implement all of the permission stuff 5 00:00:19,320 --> 00:00:25,170 that you have seen in the demo, but wait in order to follow the exact same structure that I'm using 6 00:00:25,170 --> 00:00:25,390 here. 7 00:00:25,410 --> 00:00:29,730 It's important that you are using API version 31. 8 00:00:30,180 --> 00:00:37,350 OK, so that you're not using an older one because otherwise the activity result launcher will not work. 9 00:00:37,590 --> 00:00:42,930 So before you try to implement this yourself, which I would highly recommend, let's quickly look at 10 00:00:43,320 --> 00:00:46,080 the settings that I have in my build Gradle. 11 00:00:46,080 --> 00:00:52,700 So the dependencies that I'm using are the following CTCs 1.6 ABC.com 1.3 one. 12 00:00:53,670 --> 00:01:01,390 Then the material design one for one constraint layer two on one, the J Unit one one three and the 13 00:01:01,710 --> 00:01:04,140 entire press corps version three four zero. 14 00:01:04,560 --> 00:01:10,200 OK, so if you want to have the exact same code working for you, that's going to be important. 15 00:01:10,200 --> 00:01:13,350 And then the compile SDK version should be 31. 16 00:01:13,590 --> 00:01:18,840 The target SDK version should also be thirty one, and the minimum SDK version should be twenty one. 17 00:01:19,200 --> 00:01:23,250 All right, so I highly recommend that you try to build it this way. 18 00:01:23,490 --> 00:01:27,340 I know at this point I would highly recommend that you try to build it yourself. 19 00:01:27,360 --> 00:01:31,740 So here, of course, you need to add the permission that you want to use, and this will be the last 20 00:01:31,740 --> 00:01:36,510 hint that I'm going to give you all the last code that I want to give you before you try it yourself. 21 00:01:36,750 --> 00:01:40,770 And the permission that we're going to need is to read external storage permission. 22 00:01:41,250 --> 00:01:47,760 So at this point, I would recommend that you try to implement the code that we have built in our demo 23 00:01:48,120 --> 00:01:50,880 and the permissions demo. 24 00:01:51,030 --> 00:01:56,400 OK, so try that post a video and then once you're done, you can of course, check out how I did it 25 00:01:56,670 --> 00:01:58,350 and otherwise you can skip that as well. 26 00:01:58,950 --> 00:02:01,290 So good luck with that, and I hope you try it now. 27 00:02:01,890 --> 00:02:02,730 OK, so. 28 00:02:03,570 --> 00:02:08,460 And the main activity, the first thing that I'm going to add is going to be to show this little alert 29 00:02:08,460 --> 00:02:09,030 dialog. 30 00:02:09,120 --> 00:02:14,850 OK, so I'm going to just call it show Russia-NATO dialog, as we have done in the demo. 31 00:02:15,150 --> 00:02:18,270 So if you're wondering what all of this stuff is, where it is coming from? 32 00:02:18,540 --> 00:02:21,270 Well, it just comes from the demo. 33 00:02:21,450 --> 00:02:23,550 OK, so I added it to code there already. 34 00:02:23,850 --> 00:02:28,230 Why should I have to write everything from scratch if I already had built it in the past? 35 00:02:28,230 --> 00:02:34,320 So that's something you can really do when you build your project, really try to reuse as much code 36 00:02:34,320 --> 00:02:36,350 from other projects where it makes sense. 37 00:02:36,360 --> 00:02:41,400 So he had really make sense because this is just a general functionality that I want to use, and that 38 00:02:41,400 --> 00:02:49,590 is just to display an alert dialog with a builder and then set the message that I can pass, as well 39 00:02:49,590 --> 00:02:52,290 as the title that I can pass to this method. 40 00:02:52,860 --> 00:02:58,770 OK, so now we have this private function, and now let's go ahead and go over to the top of our activity 41 00:02:58,770 --> 00:03:02,610 here, where we need to set up our activity launcher. 42 00:03:02,910 --> 00:03:11,640 So I'm going to call this one request permission and it will be of type activity result launcher. 43 00:03:11,640 --> 00:03:13,320 So activity. 44 00:03:15,020 --> 00:03:16,900 Result launcher. 45 00:03:18,640 --> 00:03:24,550 This one here, and I need to define what type it will be off, and I'm going to say it's going to be 46 00:03:24,550 --> 00:03:30,010 strengths because an array of strings, actually because I want to be able to then later on, ask for 47 00:03:30,010 --> 00:03:32,710 multiple permissions and requests for multiple permission. 48 00:03:32,710 --> 00:03:35,080 So I'm going to set it up this way straight away. 49 00:03:35,470 --> 00:03:37,270 And you can see that here. 50 00:03:37,310 --> 00:03:38,710 This import has been added. 51 00:03:38,950 --> 00:03:46,030 And this only works if you have a certain built version here because I tried it to run it on 29 on the 52 00:03:46,030 --> 00:03:52,380 compile version 29 and with my older dependencies, and it just didn't work. 53 00:03:52,390 --> 00:03:57,610 So really, make sure that you have the versions that I'm using and otherwise this activity result launcher 54 00:03:57,610 --> 00:03:58,150 wouldn't exist. 55 00:03:58,150 --> 00:04:00,940 So this is the latest approach to that. 56 00:04:01,510 --> 00:04:07,780 Before that, there was a different approach, which is also why I'm updating this video to the latest 57 00:04:07,780 --> 00:04:09,940 approach of how you can request for permissions. 58 00:04:10,540 --> 00:04:20,500 OK, so here we need to call the register for Activity result method and we need to pass the activity 59 00:04:20,500 --> 00:04:21,670 result contracts. 60 00:04:22,029 --> 00:04:29,380 So activity result contracts with multiple permissions that we are requesting. 61 00:04:30,670 --> 00:04:33,610 OK, so here opening bracket and like. 62 00:04:33,610 --> 00:04:36,940 So and then we get the permissions here. 63 00:04:37,720 --> 00:04:42,520 So here we get the permissions, which means we can use a lambda here. 64 00:04:42,530 --> 00:04:49,210 I'm going to call this one permissions like so and we can now get the permissions entries. 65 00:04:49,510 --> 00:04:52,840 So permissions that I call the permission. 66 00:04:52,960 --> 00:04:53,710 It's permissions. 67 00:04:53,710 --> 00:04:59,590 It's a plural permissions entries thought for each. 68 00:04:59,920 --> 00:05:06,100 So here I'm using for each loop to go through all of the individual permissions that were asked for. 69 00:05:06,730 --> 00:05:10,510 And accordingly, we need to get the permission name. 70 00:05:10,810 --> 00:05:17,150 I'm going to get it like so permission name will be the ID dot key. 71 00:05:17,200 --> 00:05:20,080 So here this mutable map, there's a great part here. 72 00:05:20,080 --> 00:05:26,890 You see, it's a mutable map, mutable entry, and the key is the name of the permission and the value 73 00:05:26,890 --> 00:05:29,260 is whether the permission was granted or not. 74 00:05:29,560 --> 00:05:36,100 So here I'm going to just create a variable called is granted and it will be the value of this mutable 75 00:05:36,100 --> 00:05:36,400 map. 76 00:05:36,400 --> 00:05:37,270 Mutable entry. 77 00:05:38,080 --> 00:05:46,430 OK, now we can just check if is granted, then we can toast the message and we can say permission granted. 78 00:05:46,450 --> 00:05:49,180 You can now read the storage files. 79 00:05:49,270 --> 00:05:51,220 OK, so I'm just going to use this toast here. 80 00:05:51,790 --> 00:05:52,450 Very simple. 81 00:05:52,900 --> 00:05:58,360 And then in the last block of this is granted, I will know that I don't have the permission. 82 00:05:58,990 --> 00:06:05,710 And because I'm going to use multiple permissions in the future, I can just go ahead and directly ask 83 00:06:05,710 --> 00:06:13,030 for what kind of permission name was given because in my case, I know that I'm asking for the permission, 84 00:06:14,050 --> 00:06:17,230 but read external storage and here. 85 00:06:18,240 --> 00:06:23,580 Well, if you use the money first, make sure that you're using the right import as the ID automatically 86 00:06:23,580 --> 00:06:24,960 gives you the Java import. 87 00:06:24,990 --> 00:06:26,310 That's not the one that I need. 88 00:06:26,310 --> 00:06:28,520 I need to use the Android import. 89 00:06:28,530 --> 00:06:36,060 So here use this one, manifest Android and then you see that it will be added all the way at the top 90 00:06:36,060 --> 00:06:36,290 here. 91 00:06:36,300 --> 00:06:37,350 Android Manifest. 92 00:06:37,860 --> 00:06:45,390 OK, so now this has the permissions and the one that I'm going to use is read external storage like 93 00:06:45,390 --> 00:06:48,120 so OK and this now. 94 00:06:49,400 --> 00:06:55,580 Well, in this case, I'm just going to display a toast again for now to saying, oops, you just denied 95 00:06:55,580 --> 00:06:56,180 the permission. 96 00:06:56,390 --> 00:06:58,190 So if the permission isn't granted? 97 00:06:59,250 --> 00:06:59,670 Then. 98 00:07:01,060 --> 00:07:02,080 It will be not granted. 99 00:07:02,440 --> 00:07:08,530 And what checking if it's not granted for that particular permission because, as I said, we can then 100 00:07:08,530 --> 00:07:11,560 later on add more permission requests here as well. 101 00:07:12,520 --> 00:07:12,910 So. 102 00:07:13,910 --> 00:07:18,350 This its value, by the way, is going to be of type Boolean, you can see that here. 103 00:07:18,420 --> 00:07:23,480 So the permission name will be of type, string and it value here will be of type Boolean. 104 00:07:23,840 --> 00:07:28,850 OK, so that's why I can just check if is granted OK, because it will be either true or false. 105 00:07:29,570 --> 00:07:29,990 All right. 106 00:07:30,350 --> 00:07:39,230 So that is how we set up our request permission variable that we can now use inside of our own create 107 00:07:39,500 --> 00:07:39,920 method. 108 00:07:40,370 --> 00:07:46,310 And now, in order to make it work, we of course, need to set up the second image button. 109 00:07:46,730 --> 00:07:50,990 So in the activity main example, we have those two buttons, right? 110 00:07:50,990 --> 00:07:56,510 So we have multiple buttons, but then we have this gallery button, which I called Ibey Gallery, right? 111 00:07:56,750 --> 00:08:01,220 So we need to use a fine view by ID here in order to set up this button. 112 00:08:01,430 --> 00:08:03,200 So I'm just going to set it up here. 113 00:08:03,590 --> 00:08:11,420 I'm going to call this one image button gallery, which will be of type image button like. 114 00:08:11,420 --> 00:08:17,090 So and I'm going to find the view by its ID card out ID, and it was I.B. Gallery. 115 00:08:17,600 --> 00:08:23,000 So now I can use this Iby gallery in order to set the click listener. 116 00:08:23,570 --> 00:08:29,000 And now do the request for permission right here, because that's where we need to do it right. 117 00:08:29,540 --> 00:08:29,900 So. 118 00:08:30,910 --> 00:08:38,409 I could, of course, add all of the request storage permission in here, but then the on create method 119 00:08:38,409 --> 00:08:45,220 would be super large and we can avoid that by creating an extra method that will take care just off 120 00:08:45,520 --> 00:08:49,050 the request storage permission functionality. 121 00:08:49,420 --> 00:08:51,130 So let's create a new method here. 122 00:08:51,820 --> 00:08:55,300 Private fund request storage. 123 00:08:56,420 --> 00:09:05,000 Permission like so and then let's call this inside of our one click listener here. 124 00:09:05,180 --> 00:09:09,380 So once we click on the gallery, we want to request the storage permission currently. 125 00:09:10,550 --> 00:09:12,140 There is, of course, nothing happening here. 126 00:09:12,560 --> 00:09:21,260 But of course, we need to check if we should show request permission rationale, as we have seen in 127 00:09:21,260 --> 00:09:22,790 the demo activity. 128 00:09:23,150 --> 00:09:25,860 Combat is what I'm going to use here. 129 00:09:25,880 --> 00:09:29,300 So activity at DOD should show request permission rationale. 130 00:09:29,540 --> 00:09:37,430 I think this is the longest name for a method that I have used in Android development, not build by 131 00:09:37,430 --> 00:09:37,880 myself. 132 00:09:38,000 --> 00:09:40,250 So not written by myself, but it's really descriptive. 133 00:09:40,250 --> 00:09:45,650 So it really says what it's about and you need to pass in the activity, as well as the permission string 134 00:09:45,650 --> 00:09:46,550 that you want to use. 135 00:09:46,760 --> 00:09:50,090 And the permission is something that we can get directly from the manifest, right? 136 00:09:50,390 --> 00:09:53,750 So the permission string, which just means the name of the permission. 137 00:09:53,750 --> 00:10:00,080 So external storage, because if you look at it, the external storage internal name is this variable 138 00:10:00,080 --> 00:10:04,880 name here, which is this string here and which is, by the way, the same string as we have here. 139 00:10:05,270 --> 00:10:08,490 So that's basically the permission that we are checking. 140 00:10:08,510 --> 00:10:11,690 So is should we show the request permission rationale? 141 00:10:12,260 --> 00:10:14,330 And if so, well, then let's just do it. 142 00:10:14,810 --> 00:10:15,990 And how can we do it? 143 00:10:16,070 --> 00:10:20,360 Well, I mean, first of all, clean this up a little bit. 144 00:10:20,540 --> 00:10:22,760 So this can be going to the next line. 145 00:10:22,790 --> 00:10:23,270 Like so? 146 00:10:23,800 --> 00:10:24,140 So. 147 00:10:25,790 --> 00:10:32,030 If we need to show it, then show it and the rational dialogue will be here, kids drawing app will 148 00:10:32,030 --> 00:10:38,060 be the title and the message will be kids growing up needs to access your external storage. 149 00:10:38,810 --> 00:10:39,060 Okay. 150 00:10:39,080 --> 00:10:43,730 Of course, we could be more descriptive saying otherwise you cannot assign a background image. 151 00:10:44,060 --> 00:10:50,990 So that's something you could right here for the user to know why you should or she should give us access 152 00:10:50,990 --> 00:10:55,780 to this feature because otherwise the user might think, Hey, what does he want to do with my files? 153 00:10:55,790 --> 00:11:01,130 He doesn't have to have access or this app shouldn't have access to my files, which is totally understandable. 154 00:11:01,580 --> 00:11:05,270 So if we should not show request permission rationale. 155 00:11:05,510 --> 00:11:16,490 So in the alt's blog, then we can request for permission and we're going to launch an array of permissions. 156 00:11:16,760 --> 00:11:22,220 And in this case, the array will just be for now having won permission entry. 157 00:11:22,610 --> 00:11:24,980 So read external storage. 158 00:11:25,370 --> 00:11:27,370 We're going to add more later on. 159 00:11:27,380 --> 00:11:32,180 So for example, if you want to start writing to the external storage, once we want to store the images, 160 00:11:32,480 --> 00:11:34,070 that's where we would then add it. 161 00:11:34,270 --> 00:11:44,510 OK, so here you can add a to do at writing external storage permission. 162 00:11:45,590 --> 00:11:48,680 OK, so we just know, OK, well, that's why we will need to add it later on. 163 00:11:48,980 --> 00:11:52,280 But accordingly, we would have to add it in the Android Manifest as well. 164 00:11:52,310 --> 00:11:53,510 We're going to see that later on. 165 00:11:54,200 --> 00:11:54,650 OK. 166 00:11:54,830 --> 00:11:57,980 So at this point, we should be done. 167 00:11:58,070 --> 00:11:59,150 Let's test it. 168 00:11:59,160 --> 00:12:02,270 I don't need this import image because I just misspelled something there. 169 00:12:02,660 --> 00:12:09,440 Let's try it out and see if we're going to request for permission once we click on our gallery button. 170 00:12:11,120 --> 00:12:11,600 Image problem. 171 00:12:12,630 --> 00:12:16,350 By the way, the next part that I'm going to show you so the next couple of minutes where I'm showing 172 00:12:16,350 --> 00:12:21,960 you how I make changes to my Gradle files, as well as to my Android manifest. 173 00:12:22,290 --> 00:12:28,270 They will not be necessary if you are using the Arctic Fox version that I was recommending. 174 00:12:28,350 --> 00:12:31,440 So the Arctic Fox version 2020. three. 175 00:12:31,890 --> 00:12:35,850 And if that's the case, then you will not have to make those changes. 176 00:12:35,850 --> 00:12:40,860 So what I would recommend is that you just run the application and test it on your emulator or device. 177 00:12:40,950 --> 00:12:47,160 And if it works, you can just ignore the next two minutes of video and then just move on with the course. 178 00:12:47,640 --> 00:12:51,390 So what I did is I used my old project to build up on it. 179 00:12:51,630 --> 00:12:54,620 And according to, of course, the versions were different. 180 00:12:54,630 --> 00:13:01,440 So if you want to use the version that I'm using here, I'm using the current blend version 1.5 30 and 181 00:13:01,440 --> 00:13:03,880 here in that case, you don't need to set up JS Center. 182 00:13:04,110 --> 00:13:12,540 You can use the MAVEN Central here, as well as I'm using the the Gradle version seven zero two. 183 00:13:12,540 --> 00:13:14,510 If you do that, you need to sync your file. 184 00:13:14,520 --> 00:13:18,420 And then once you did that and think that you might need to migrate. 185 00:13:18,420 --> 00:13:24,240 But once you do that in the Android Manifest, you need to add Android exported setting. 186 00:13:24,540 --> 00:13:31,440 So here Android exported must be set to true in order for you to be able to run it with this particular 187 00:13:31,440 --> 00:13:31,800 version. 188 00:13:32,070 --> 00:13:39,990 If you, however, started building this application using directly Android API 31, you should not 189 00:13:39,990 --> 00:13:44,070 run into these problems because these settings should have been set up in the same way. 190 00:13:44,370 --> 00:13:45,540 The same goes for the version. 191 00:13:45,540 --> 00:13:48,360 If they're close enough, then you shouldn't have to make changes. 192 00:13:48,720 --> 00:13:53,380 But other than that, that's basically going to be the code that we need to use. 193 00:13:53,400 --> 00:13:56,940 So let's go ahead and actually test our application. 194 00:13:57,330 --> 00:14:04,410 So once we click on the button, you can now see that if we don't allow, it will say, Oops, you just 195 00:14:04,410 --> 00:14:06,780 denied, even though we didn't denied actively. 196 00:14:06,780 --> 00:14:11,880 But by not clicking on it, we are, so to speak, denying or not giving access. 197 00:14:11,880 --> 00:14:13,260 Or at least we are not giving access. 198 00:14:13,260 --> 00:14:14,430 That's the whole point here, right? 199 00:14:14,730 --> 00:14:18,480 So now if we allow it, you can see permission granted and you can read the storage files. 200 00:14:18,750 --> 00:14:26,220 And if I click it once again, you see, I just get this detail here, but I don't well do any other 201 00:14:26,220 --> 00:14:27,630 features or activities. 202 00:14:28,020 --> 00:14:30,270 And the thing is what we want to do. 203 00:14:30,280 --> 00:14:37,080 And instead of displaying the toast here, what we want to do is we want to actually then run the code 204 00:14:37,080 --> 00:14:42,900 that we want to execute, which will open a new activity for result, which will then take an image 205 00:14:43,170 --> 00:14:48,030 from the gallery, which we can select and then put it into our application. 206 00:14:48,420 --> 00:14:51,150 So that's what we're going to set up in the next few videos. 207 00:14:51,480 --> 00:14:53,100 But for now, that is it. 208 00:14:53,280 --> 00:14:54,750 So see you in the next video.