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Hi.

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Hello again.

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In the previous video, well, I showed you was how to install VirtualBox, how to install Ubuntu

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inside VirtualBox.

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And then we transported the files, the project files into this Ubuntu operating system.

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So now they are in the file system inside Ubuntu.

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What we are going to do now is we are going to use the Buildozer Python library to create an APK

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file.

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But before we do that, we need to install some dependencies, in that Ubuntu operating system because

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because Buildozer needs them to be able to create this APK mobile file. To do that while you

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are in the folder where the project files are

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right-click

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and go to open in terminal.

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So that will open the Linux terminal.

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You'll see this current directory.

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So that is where your files are. If you do ls,

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you'll see that these are the files.

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So, main.py is there.

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Make sure this is named

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exactly main.py

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because Buildozer needs to see that file and that file should have the main program.

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I do need this screenshot file.

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So I'm just going to remove that.

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So as you can see, the screen shots file, it's not there anymore. 
To locate the open windows on Ubuntu

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go to activities,

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and so you'll see that the terminal is open and the file explorer is also open as well.

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So click on terminal.

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That's that will bring back the terminal window.

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Now, among those files, you see this kivy-buildozer-installer.sh.

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You can see the content of that file using cat.

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And write the name of the file.

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So this is what that file has inside.

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And basically these are instructions on installing many dependencies, including Python, Buildozer

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and Kivy, because this Linux system doesn't have Kivy neither.

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So.

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Go down here we are again here and click bash

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ki.

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Press tap to autocomplete the name.

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So that is the name of the sh file.

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Click, enter, enter the password for your Ubuntu system.

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So this is a password that you created when you were installing Ubuntu.

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Ubuntu asked you for a username and password and expect this to take a while.

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And so Ubuntu is now downloading these packages from the Internet and the Internet was automatically

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enabled when you installed Ubuntu.

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So you didn't have to do any manual configuration of the Internet connection.

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Sometimes you'll get some warnings, but you can ignore them.

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And this is not a stable process because there's a lot of dependencies involved.

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And sometimes you get some errors when we create that APK file so that file will not be created sometimes.

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It's not an easy process, but you can read the errors.

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What they are saying and maybe search on Google to see what others are talking about, about that particular

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error.

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So there is no guarantee that it will work.

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That being said, Linux is the best operating system to be able to create these APK packages.

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And finally, the installation has finished in my computer in my virtual Linux computer.

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The next step is optional.

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You might want to try out the app that you have. 
To do that use python3, the python3 command.

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Main.py which is the file that we have been using.

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So the app is working fine with Python.

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Let's try it out.

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Yeah, it's working fine.

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So close that window.

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And the next thing we want to do is to create a Buildozer specification file. To do that

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we use buildozer,

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so the command buildozer init.

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OK.

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That's created this buildozer.spec file.

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You can minimize this window and find that file in file system.

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You can ignore this file.

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We don't need this.

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It was just some notes I was using. So buildozer.spec.

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You can double click it and it will open with the text editor app.

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So here what we have here is we can change some parameters of the app that we are going to create.

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Let's put the title.

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How do you feel?

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You can choose a name for the package, but don't use spaces there.

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I'll just leave it myapp.

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And you want to stop here.

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What extensions do you want the package to include?

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So we have py files.

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We have some png files as well.

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And we also have Json files.

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So this is what we want to be included.

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Kv file as well.

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But it's already there.

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So kv is already there.

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And then go further down.

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So this is going to be versioned 0.1.

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It's our first deployment.

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And then you want to stop in here.

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So what requirements does your package have?

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Well, let's see

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what libraries,

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what third party libraries

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do we have in our main.py file.

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So we have the kivy file.

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Hoverable is a local file.

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It's not a third party library.

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This local file is included in the project files.

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So you don't have to declare that in the requirements.

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And that's all we have.

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Json and glob are standard Python libraries.

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So they come with Python at random as well.

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Random as well, and also Pathlib.

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So in the buildozer.spec file, we don't have to add anything else other than python3

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and kivy, go down.

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Here you want to enable all orientations not only portrayed on the mobile.

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That's fine. And this version here should be changed to 8.

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And that's all.

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Make sure to save the file, so click save or control S, close.

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And then go back to the terminal window.

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And now what's left to do is we want to run the command that will create hopefully the APK file.

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That is buildozer android debug.

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At some point, that will ask you if you want to accept the license, to accept the license

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press Y

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and then enter.

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That's initially failed in my system.

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So if that is the case, you might want to go back and look at the error because these are just generic

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messages.

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You want to locate after these colours,

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you want to locate here

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the top of the red message.

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So that command failed, and I think that is because we specified version eight.

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So let's try to go to the buildozer.spec file.

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And change that.

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Delete that value.

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And replace it with arm64-v8a. Paste that in there.

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And besides this, we also I think we forgot to

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add the .txt extension.

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Among the accepted extensions here.

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So .txt because .txt

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is the file where we have those quotes.

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So make sure to save this, close it and go to that terminal again, this time we're going to try again

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to build the APK file using buildozer android.

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But this time, we're going to have the clean flag and then debug.

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So the clean flag will make sure not to mess with the previous efforts of trying to build the APK package.

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Press enter

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and again, we are going to have to wait a while for the process of packaging to be completed.

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But this time you're not going to be asked to accept the license.

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The process might be quicker than before.

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So let's wait a bit.

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So the second build efforts were completed in my Linux.

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Go to the folder.

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Bin has been created in the folder.

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So inside that you should be able to find the APK file.

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So that's about this video. In the next video

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I'm going to get an Android device and I'm going to show you how to install

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that APK file on an Android device.

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See you.