WEBVTT 00:01.530 --> 00:06.390 So it's also very important to know about the basics of file structure, of an Android application. 00:07.470 --> 00:13.330 So on this lecture, some important files and folders and their significance will. 00:13.600 --> 00:19.590 Well, we'll go over so that you can easily understand the Android studio work environment. 00:20.960 --> 00:29.060 So Android studio is the official Integrated Development Environment, or IDY, for Android app development, 00:29.810 --> 00:35.150 Android Studio provides the fastest possible turnaround on your coding and running workflow. 00:36.730 --> 00:43.480 Now, throughout the course, we will be using Android studio mostly as an Android emulator, so this 00:43.480 --> 00:50.320 Android emulator simulates Android devices on your computer so that you can test your applications on 00:50.320 --> 00:58.420 a variety of devices and Android API levels without needing to have, you know, several physical devices 00:58.420 --> 01:00.810 scattered across your desk. 01:00.820 --> 01:03.290 My desk gets smaller and smaller every day. 01:03.490 --> 01:05.060 No, I won't show you a picture of it. 01:05.230 --> 01:09.970 So the emulator provides almost all of the capabilities of a real Android device. 01:10.330 --> 01:12.490 So it's definitely worth a look. 01:13.930 --> 01:16.090 However, we need to install it first. 01:17.050 --> 01:21.790 So I want you to find your favorite browser search for Android studio. 01:23.220 --> 01:28.320 And the first website is indeed the official website of Android studio. 01:28.360 --> 01:29.250 So just click on it. 01:30.140 --> 01:36.680 Scroll down a little bit and quickly browse for the features and. 01:37.750 --> 01:44.980 OK, so here you see the layout editor, so this enables you to quickly build layouts by dragging UI 01:44.980 --> 01:51.250 elements into a visual design editor instead of writing layout SML by hand. 01:52.830 --> 01:55.950 Android studio also includes APK Analyzer. 01:57.010 --> 02:03.190 And this provides immediate insight into the composition of an epic after the build process complete. 02:04.680 --> 02:12.390 Using the APK analyzer can reduce the time while debugging issues with decs files and resources within 02:12.390 --> 02:12.830 and out. 02:13.760 --> 02:17.000 It also will help you reduce an epic size. 02:19.600 --> 02:25.000 Now, like you said before, it's thanks to the Emulator feature that you can simulate incoming phone 02:25.000 --> 02:32.320 calls and text messages, specify the location of the device, simulate hardware sensors, access the 02:32.320 --> 02:36.060 Google Play store and, well, just about anything you can think of. 02:37.290 --> 02:42.870 Android studio also has a flexible build system and real time profiler's. 02:44.180 --> 02:45.860 Now, scroll down a little bit more. 02:47.030 --> 02:50.720 And here are the Android studio download files. 02:52.450 --> 02:55.390 So you can download it here depending on your operating system. 02:56.300 --> 03:00.950 And here you can download the package suitable for your particular operating system. 03:02.100 --> 03:05.700 So these are the system requirements to use Android studio. 03:07.910 --> 03:11.030 So as you've read it through a little bit, let's go ahead and download. 03:11.930 --> 03:16.490 And, of course, before downloading will agree to terms and conditions. 03:18.050 --> 03:20.150 Click on download and save the file. 03:20.390 --> 03:23.090 OK, so now we just wait a little bit. 03:28.650 --> 03:33.600 And it is now downloaded so we can click on the downloaded disk file. 03:37.110 --> 03:39.740 And I'll move it to the application folder. 03:44.790 --> 03:48.420 And this is good, so insulation is now complete. 03:49.460 --> 03:52.480 OK, so go ahead and open the Android studio. 03:59.760 --> 04:05.180 And there's a couple of steps we need to step through to get set up. 04:06.470 --> 04:07.100 Next. 04:08.490 --> 04:11.310 I'll choose the standard type next. 04:12.670 --> 04:15.850 So I do like dark theme and next. 04:17.510 --> 04:21.040 These are the installation settings, so let's review them. 04:22.390 --> 04:28.510 And it all looks good to me, so let's go ahead and quick finish. 04:29.660 --> 04:31.400 Now it's downloading the components. 04:33.200 --> 04:37.400 And you might need to allow little time for the insulation. 04:41.480 --> 04:47.210 All right, so now I've got to allow some extensions from the security preferences. 04:49.360 --> 04:53.730 Use password or fingerprint and allow from here. 04:55.710 --> 04:57.390 Now we can lock the changes. 04:59.310 --> 05:02.280 OK, so insulation is complete. 05:03.520 --> 05:04.660 Let's go ahead and open it. 05:09.570 --> 05:11.300 OK, let's create a new project. 05:13.730 --> 05:22.010 There are project templates for phones, tablets, where OS, TV, automotive, you can choose one of 05:22.010 --> 05:24.530 them depending on the platform that you want to use. 05:26.000 --> 05:31.040 And I'm just going to select a basic activity template for phones. 05:32.710 --> 05:33.520 Click next. 05:34.600 --> 05:39.190 And let's name the application that we're going to develop. 05:39.700 --> 05:42.910 So this is a package name and default save location. 05:44.560 --> 05:47.680 You can choose Java or Katlin as a programming language. 05:50.300 --> 05:57.380 So like I said before, we can use Android eight, Orio, Android nine, PAE or Android 10. 05:59.440 --> 06:03.550 So what I'm going to do is select Android nine and finish. 06:06.070 --> 06:08.260 Yeah, we can go ahead and skip the tips for now. 06:11.360 --> 06:17.840 All right, so now on the left hand side, there is the file structure of the application. 06:19.230 --> 06:21.690 To explain the most important ones briefly. 06:23.050 --> 06:24.900 First of all, have a look at the main folders. 06:26.200 --> 06:31.690 OK, so you see how they are manifest Java Reds and gradable scripts. 06:33.650 --> 06:37.550 So here, Android manifest, XM Alfond. 06:39.150 --> 06:46.200 So let me explain that every project Android includes a manifest file stored in the root directory of 06:46.200 --> 06:47.700 its project hierarchy. 06:48.850 --> 06:57.530 Manifest file is an important part of our app because it defines the structure and metadata of our application, 06:57.880 --> 07:01.300 its components and its requirements. 07:02.970 --> 07:12.360 His file includes notes for each of the activities, services, content providers and broadcast receiver 07:12.360 --> 07:17.760 that makes the applications and while using content filters and permissions. 07:19.200 --> 07:23.310 Determines how they coordinate with each other and other applications. 07:23.340 --> 07:26.040 So this is what makes it all possible. 07:28.720 --> 07:31.360 And we arrive at the Java folder. 07:33.200 --> 07:36.470 The Java folder contains the Java source code files. 07:37.830 --> 07:43.410 These files are used as a controller for a controlled UI or layout file. 07:44.870 --> 07:51.980 It gets the data from the loud file, and after processing the data output will be shown in the UI layout. 07:54.530 --> 07:57.830 So it works on the back end of an Android application, basically. 08:00.420 --> 08:04.470 The next one is a drawable file under the Reds folder. 08:06.470 --> 08:11.360 A drawable folder contains resource type files that can be drawn. 08:12.880 --> 08:21.760 Draw bulls may take a variety of files like bitmap PMG, jpeg nine, patch vector, XML shape, layered 08:21.760 --> 08:23.920 slates, levels, scale. 08:25.480 --> 08:27.130 So why don't we have a look at the layout? 08:28.400 --> 08:34.700 A layout defines the visual structure for user interface, such as the UI for an Android application. 08:36.030 --> 08:41.040 This folder store's layout files that are written in the language XML. 08:43.990 --> 08:50.740 You can always add additional layout objects or widgets as child elements to gradually build a view 08:50.740 --> 08:54.190 hierarchy that defines your layout file. 08:55.110 --> 08:57.220 Another folder is Mitta Map. 08:58.150 --> 09:04.300 And it contains the image asset file that can be used in Android studio applications. 09:05.300 --> 09:13.460 You can generate the following icon types like launcher icons, action bar and TAB icons and notification 09:13.460 --> 09:14.090 icons. 09:16.630 --> 09:22.990 And navigation graph is a resource file that contains all of your destinations and actions. 09:24.680 --> 09:28.220 The graph represents all of your apps, navigation paths. 09:30.180 --> 09:36.990 Now, here's the colors dot XML file, so it contains color resources of Android applications. 09:37.890 --> 09:45.680 Different color values are identified by a unique name that can be used in the Android application program. 09:47.440 --> 09:55.270 And then finally, we come upon the build that gradle module app file, and this defines the module 09:55.280 --> 09:57.340 specific build configurations. 09:59.190 --> 10:03.900 And here you can add dependencies that you need in your Android application.