Build Simple Android Application – In my previous article, I described detailed steps on how to create a simple Android app. In this particular application I have also explained the basic concepts of android and android button.
Before moving on, it would be a good idea to go through the full HelloWorld tutorial. Here is the link again, My First HelloWorld Android App
Build Simple Android Application
If the Add button is pressed before the = button, the Add action will be performed as shown above.
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Now everything should be working fine and we are ready to run our Android calculator app. I used my mobile phone to run our app, you can use emulator or your device.
Congratulations!! If you’ve followed all the steps and reached this point, it means you’ve followed all the steps correctly and your Android Calculator app is up and running.
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I am Kuldeep Godasara from Gujarat, India. I am a technical writer and developer. I started working with wordpress back in 2012 when I was working at Google
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. I took a deep dive into WordPress blogging and SEO. this is a medium where I will share my knowledge gained from various experiences.
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In this guide, we’ll go through a list of iPhone or iOS settings you’d like to turn off… In this guide, we’ll try to create a Simple Access app using Android. Android is basically the piece of software that makes your hardware work. Android is an open source operating system, free and suitable for mobile developers. Android is available for any device like TV, phone, watch, etc.
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First, you need to download and install the Android Development IDE (Android Studio or Eclipse). Android Studio is open source, feel free to develop your own stuff.
Now we will design the application, first find the layout folder and select activity_login.xml. Then copy and paste the code below.
Next, you need to create another layout by right-clicking on the layout folder, which is activity_user.xml. Then write the code for these blocks in the layout script.
The Android manifest file provides the Android system with important information about your app that the system should request before running the code.
Editing A Layout File (how To)
This code contains the main functions of the program. This code will log you in if the username and password are entered correctly. To create a function, simply write code in the Login class
This code will display the new layout after successful user login. This is where the user is redirected after entering patch information. Just write this block of code inside the User class.
That’s it, we have successfully created Simple Login app using Android. I hope this guide will give you some ideas about Android programming. For more updates and tutorials visit this site.
Note: Due to the size or complexity of this presentation, the author has provided it as a .zip file to reduce download time. Once downloaded, you’ll need a program like Winzip to unzip it.
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Virus Note: All files are checked for viruses once a day, but new viruses appear every day, so no antivirus program can catch them 100% of the time. In this post we are going to create a basic working application. . This program will serve not only as a learning opportunity, but as something that you can reconstruct and repurpose for your own purposes.
In this post we are going to create a basic working application. This program, if all goes according to plan, will serve not only as a learning opportunity, but as something you can redesign and adapt for your own purposes. If you are so inclined, you can change some details, compile it and distribute/sell it. All the code, images and resources are available on GitHub here, or you can follow the step-by-step process and build your own version.
This is a two-part series, so in part one we’re only going to do the bare bones. In the next part, everything will become a little more subtle and useful.
We’ve already covered how to set up Android Studio, and previous posts on this site have covered the steps to build a Hello World app. So, if you are not familiar with the basic installation process, you should read these posts first. For this guide, I’m going to assume you already have Android Studio installed, so we’ll jump right in. Next question. What shall I do:
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I wanted to create something simple that could easily be turned into other things. I was going to do a test, but it looks a lot like a game (and a game might make for an interesting post in the future…). So I opted for the quiz instead. Yes, it’s certainly less fun.
I always wanted to know morse code, phonetic alphabet and chemical symbols. I just think it would be great if one day these skills came in handy in the real world and everyone was amazed (“Wait, that’s Morse code for the chemical symbol for potassium”). So this app will be a test of a learning tool that you can use every day to learn such things.
However, you can simply change the questions and answers. You can make it a quiz, a review tool…
So, to get started, open Android Studio and start with a new empty action (specify empty action, not empty). This is the third option from the left (pictured) when creating a new application, which will be simple for now:
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You can name the new app Crystalize, or if you already have other plans, you can name it something else. Of course, you can also choose your company’s domain. For simplicity, I recommend leaving the action name and layout at their defaults, as this way we’ll be on the same page.
Now go to the activity_main.xml file and look around. “activity_main.xml” is the .xml file that will define the MainActivity.java layout. For the most part, each “activity” (screen) in an application will have two corresponding files: an .xml that defines the layout, and a java file that defines the behavior of the application and what happens when you click on various elements. If you’ve ever built a website, XML is used the same way HTML is used to create web pages, in fact XML and HTML are interrelated.
Right now, activity_main.xml is pretty barren and uses a relative layout, “TextView” on “Hello World”. Read this page and you will see what everything does. “android:layout_height” for example sets the height and “android:text” tells us what text to display. There are many other directives we can add to customize the way things look, but all that’s really needed in most cases is the height and width.
Let’s start mixing things up. Open activity_main.xml. We’re going to change the layout from “relative” to “linear”, which means that the elements we’ve added will simply line up on top of each other. We also add a line that centers gravity so that the edited text appears in the middle of the screen. We do this by simply adding “android:gravity = ‘center'” somewhere in the angle brackets for the linear layout.
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If you look at the designer, we have now moved the text to the center of the screen. We’re going to make this our page, so some text will work for our app title.
(Note that you can switch between the constructor and the xml code you’re viewing using the tabs below.)
And with that in mind, it probably makes sense to rename activity_main.xml to something else. Right-click the tab and rename it to “splash_page.xml”. The option to continue changes instead of “OK” is “Refactoring”. This means that the app name will be changed in all references and examples, so the main activity will now say “setContentView(R.layout.splash_page);” without changing anything itself.
But a little bit of text isn’t really enough to make pages look good. Instead, we need to increase the size and font of this text. And we need that to be the name of our app.
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So change Hello World to Crystalize. This is how I decided to name the app. it refers to “crystallized intelligence” in psychology, which is basically a fancy term for knowledge (as opposed to “fluid intelligence,” which is more about IQ, memory, concentration, etc.); Yes, I’m crazy.
DP stands for “density independent pixels” and that means it should
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