Create Android application with Xamarin.Android
5 minute(s) read
Published on: Sep 18, 2021
Updated on: Dec 14, 2021
Today, applications can be used by users to meet their needs. Using Xamarin, it is possible to design and develop several different applications( in German: verschiedene Anwendungen entwickeln.).
In this article, we want to design and develop an app called a math game.
Steps of creating and developing apps
1- To do this, we must first create a project in Visual Studio.
2- When creating a project, we must select Installed - Visual C #.
3- Then click on MainActivity.cs.
4- Then go to Resources- layout- Main. axml.
How to design a UI for an app
5- First, we must design a suitable logo for this game and application.
6- Then, you have to right-click on the drawable folder to access the Open Folder in File Explorer.
7- On the created page, we can draw our desired logo design for the application.
8- Let's go back to Visual Studio until adding that designed logo file to our project.
9- Then right-click on the drawable folder to access Add- Existing Item.
10- In the Explorer page that opens, select the graphics.
11- In this section, you added the designed image view and logo to the Main. axml file.
It is worth noting that to work better, I use a line by default and work with it.
12- In designing an application, we want to design a math challenge in text form and ask the user to solve that challenge, enter the answer in a special box, and send it to us with the push of a button.
13- Of course, I also design some views to show the number of incorrect answers and correct passes in this application.
The following codes can also be used to design and create a simple image:
To get the numeric passes entered by the user, we need to use input_type = "number."
14- At this stage, we want to design questions to challenge the user and the user to answer those questions.
15- There is one thing at this stage of application design: we have designed a question that is displayed to the user in large numbers. To prevent this, we must consider random numbers.
The codes listed above can generate and display random numbers between 1 and 99.
16- To answer the questions asked by the application, the user must be able to use the onClick feature, and we must add it when designing and developing the application ( in Czech: navrhování a vývoj aplikace ).
17- Then, we must call the onClick method to use it.
18- Using Int. Parse, we can get an integer from the user in the box, and we can also use "==" to compare the numbers.
19- Then, we count the wrong answers and the right answers and compare them with each other. After that, we will delete those questions and answers and insert another question.
20- I also use AVD Manager to test it in the simulator and press the green button.
21- In this case, it checks the bugs in the program and shows us all the errors and bugs in the program in the lines.
By following the steps above, you can easily design an application and extend it to a model that challenges the user. This application is a math challenge game that asks questions from the user, and the user must solve that challenge and enter the answer in a special box.
Design another application
The following is required to design this:
- Windows 10 operating system
- Visual Studio 2019
Steps to building an Android
1- First, we must create a file in Xamarin.Android.
2- I chose the desired name for my project. The rejection of the educational article is the name of the TimeChangerAndroid application.
3- When creating a project, we must select the New Cross-Platform App, Blank App, to create an empty and new project.
4- Then, I open the activity_main.xml section.
5- I use the vertical LinearLayout to align when displayed above the buttons.
6- I also use the horizontal LinearLayout to arrange the buttons next to each other.
7- The codes that should be in the activity_main.xml section are as follows:
After entering the above code, you can run TimeChangerAndroid and view the user interface.
8- Then, we consider some settings for this user interface by giving the users the ability to perform certain operations by pressing the buttons, depending on the times shown.
9- MainActivity.cs file contains logical codes that the user interface will do.
10- Then, we need to get a reference from TextView that shows the current time.
11- We can also use FindViewById to search for elements in the user interface.
12- The complete method is in the UpdateTimeLabel section:
13- Then, we must update the time shown until it shows the exact time.
14- To do this, call the callback method periodically.
15- Then, we must add the HourOffset feature.
16- Then, we need to update the UpdateTimeLabel to be aware of HourOffset.
17- First, we use FindViewById until it finds the ID of the buttons.
18- Then add the Click event button.
19- The code in the MainActivity.cs section should be as follows:
After completing these steps, you can press F5 to run the program. Of course, this program also can be debugged.