How Do I Build An Android App


How To Build An App: Conclusion And Key Takeaways

How to Make an Android App for Beginners

Building apps isnt always easy. Whether its your first app or youve built multiple apps, theres always room for improvement. Its always a great idea to educate yourself instead of blindly picking an app development company and just hoping for the best.

Take advantage of new technology and tools at your disposal. Today, you can make an app without any coding skills. Platforms like BuildFire will even help you get published on both app stores for Apple and Google Play.

This in-depth guide on how to develop an app is just one of the many resources that we offer at BuildFire. Its broad enough to give you valuable insights on how to make an app in nearly every category. But some of you might have some more use-case specific questions about how to build an app for your business.

For example, you might want to learn how to make an app for your ecommerce site. Or maybe you want to figure out how to build an app for internal employee communication. We have guides for both of these.

We even have resources that show show you how to develop an app for schools, universities, and religious organizations. Our tutorials can teach you how to develop an app for events, podcasts, and so much more.

Need help figuring out how to build an app for your small business? We have you covered.

Contact our team of experts here at BuildFire if you have any additional questions. Were happy to help and guide you in the right direction.

Powerful app builder

Enable Run Fallback For Apply Changes

After you’ve clicked either Apply Changes and Restart Activity orApply Code Changes, Android Studio builds a new APK and determines whetherthe changes can be applied. If the changes can’t be applied and would causeApply Changes to fail, Android Studio prompts you to Runyour app again instead. However, if you don’t want to be prompted every timethis occurs, you can configure Android Studio to automatically rerun your appwhen changes can’t be applied.

To enable this behavior, follow these steps:

  • Open the Settings or Preferences dialog:

  • On Windows or Linux, select File > Settings from the menu bar.
  • On macOS, select Android Studio > Preferences from the menu bar.
  • Navigate to Build, Execution, Deployment > Deployment.

  • Select the checkboxes to enable automatic Run fallback for either of theApply Changes actions.

  • Click OK.

  • Note:

    Android Resources: Support For Various Device Capabilities

    The Android SDK was designed from the outset to support a wide variety of device capabilities. Much has been written about the fragmentation of devices on the Android platform. However, from the beginning, the Android SDK was designed to support this variety of device attributes, including screen size, pixel density and Android API versions.

    Screen layouts, image assets , styles and other configuration files are all incorporated in a series of subdirectories underneath a master resource directory. The Android SDK documentation illustrates how multiple versions of the same file can be placed in uniquely named directories within this resource structure, so that the proper one is loaded depending on the capabilities and orientation of the device at runtime.

    Consider this directory structure:

    The structure above shows uniquely named directories for drawable assets, with suffixes of -hdpi, -ldpi, -mdpi and so on. This permits the developer to supply different image content to correspond with the DPI resolution of a given screen. Similar capabilities extend to things like the layout files, which may supply unique content according to screen size, landscape or portrait orientation, etc. In the example above, we see unique folders for values-v11 and values-v14. This allows for two different styles.xml files to be used for version 11 and version 14 of the Android operating system.

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    Designating A Launch Activity In The Manifest File

    Each Android application must designate a default activity within the Android manifest file. In the manifest file of a Droid1 project, DroidActivity might be designated as the default activity.

    Other Activity classes might be designated to launch under specific circumstances. You manage these secondary entry points by configuring the Android manifest file with custom filters.

    In Chippy’s Revenge, SplashActivity would be the most logical activity to launch by default.

    Learn To Create An Android App From Scratch

    How do Android App Developers create the images to upload in Play Store ...

    In this section, we discuss the process of creating an android app from the ground up. Let us start with a simple task go over to Android Studio, write a code in Java to display Hello Android Studio.’ Afterward, build a GUI interface that accepts textual input and displays the text.

    Fundamental Concepts

    Foremost, there are two essential conceptions a novice android app developer must understand the workings of the android app’s components and adaptation of your app to different devices.

    Android Apps Components

    An Android App is made of loosely coupled components that are separately and independently invoked but interoperate within the app ecosystem. Apps AndroidManifest.xml file contains essential information about each component, how they interact, and their hardware configurations, for example. There are four main components:

    Android Apps Device Compatibility

    Android Studio provides tools and environment to build an application that can be successfully used in different kinds of android devices. This is done through the type of resources offered. For example, you must provide a resource that allows your application to adapt to different screen sizes, or display in multiple languages. The system decides the kind of resources required based on its hardware specifications.

    Steps to Create an Android Project

    If you want to build an Android application, you must be ready to invest your resources to ensure your project becomes a success.

    Running an Android App

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    Setting Up Gradle Variables

    Now that we have created the keystore file we can tell the build process to use that file:

    • Copy or move the my-release-key.keystore file under a directory that you can access. It can be in your home directory or anywhere in the file system.

    • Edit the file in your $HOME directory , or create it if one does not exist, and add the following:



    • Replace /full/path/to/directory/containing/my-release-key.keystore with the full path to the actual keystore file and ******** with the actual keystore password.
    • Back up your keystore and dont forget the password.


    Once you publish the app on the Play Store, the app needs to be signed with the same key every time you want to distriibute a new build. If you lose this key, you will need to republish your app under a different package id .

    Adding A Launcher Icon

    When a new Flutter app is created, it has a default launcher icon.To customize this icon, you might want to check out theflutter_launcher_icons package.

    Alternatively, you can do it manually using the following steps:

  • Review the Material Design producticons guidelines for icon design.

  • In the /android/app/src/main/res/ directory,place your icon files in folders named usingconfiguration qualifiers.The default mipmap- folders demonstrate the correctnaming convention.

  • In AndroidManifest.xml, update theapplication tags android:iconattribute to reference icons from the previousstep .

  • To verify that the icon has been replaced,run your app and inspect the app icon in the Launcher.

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    Add A Constraint To The New Button

    You will now constrain the top of the button to the bottom of the TextView.

  • Move the cursor over the circle at the top of the Button.
  • The Button moves up to sit just below the TextView because the top of the button is now constrained to the bottom of the TextView.

  • Take a look at the Constraint Widget in the Layout pane of the Attributes panel. It shows some constraints for the Button, including Top -> BottomOf textView.
  • Take a look at the XML code for the button. It now includes the attribute that constrains the top of the button to the bottom of the TextView.
  • You may see a warning, “Not Horizontally Constrained“. To fix this, add a constraint from the left side of the button to the left side of the screen.
  • Also add a constraint to constrain the bottom of the button to the bottom of the screen.
  • Before adding another button, relabel this button so things are a little clearer about which button is which.

  • Look at the Attributes panel on the right, and notice the id field.
  • Change the id from button to toast_button.
  • Introduction: How To Create An Android App With Android Studio

    Create an App for Android, iOS, Mac & Windows – in 30 MINUTES!

    This tutorial will teach you the basics of how to build an Android app using the Android Studio development environment. As Android devices become increasingly more common, demand for new apps will only increase. Android Studio is an easy to use development environment to learn on. It’s best if one has a working knowledge of the Java programming language for this tutorial because it is the language used by Android. There won’t be much code used in this tutorial, so I will assume that you know enough Java to understand or are willing to look up what you don’t know. This will take roughly 30-60 minutes, depending on how quickly you are able to download and install Android Studio. After using this tutorial to create your first Android app, you’ll be well on your way to a fun new hobby or possibly even a promising career in mobile development.

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    Why Choose Builderai To Create Android Apps

    Simple. Itâs so easy. You donât need to know any code to build your Android app, or schedule meetings with agencies, or get stuck discussing user journeys with developers.

    Because we assemble your app from reusable features, itâs quicker than starting from scratch each time. Itâs cheaper too, as we spread the cost of these building blocks across our clients â the bulk of your budget goes on what makes your Android app unique.

    Our features and the ways they work together have been perfected on other apps â you know theyâll work. And theyâre customised by our network of thousands of specialist developers. Our algorithm tests each developer, finds their specialism and matches the best one to each element of your project.

    Hereâs what we have to offer you!

    Builder Now: an instant app prototyping tool lets you create your Android app prototype in 10 minutes or less. Itâs easy, fast and no-cost involved. Letâs give it a try and build your app prototype for free!

    Builder Studio: a low, no-code app builder lets you build Android apps without code writing skillsor worrying about the technology behind your app.

    Builder Cloud: our prepaid Cloud Wallet lets you host your apps on any public cloud platform â including AWS, Azure, DigitalOcean and Alibaba Cloud. One cloud account for all â access to any public cloud.

    âBuilder Care: our aftercare product helps you keep your software fresh, up-to-date and running smoothly.

    Change The Run/debug Configuration

    When you run your app for the first time, Android Studio uses a default runconfiguration. The run configuration specifies whether to deploy your app froman APK or an Android App Bundle, the module to run,package to deploy, activity to start, target device, emulator settings, logcatoptions, and more.

    The default run/debug configuration builds an APK, launches the defaultproject activity, and uses the Select Deployment Target dialog for targetdevice selection. If the default settings don’t suit your project or module,you can customize the run/debug configuration, or even create a new one, atthe project, default, and module levels. To edit a run/debug configuration,select Run > Edit Configurations. Formore information, see Create andEdit Run/Debug Configurations.

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    Use Hardware Virtualization To Speed Up That Slow Emulator

    The Android emulator has long been maligned for its poor performance on many machines. This is because, in the past, the emulator has been running actual code compiled for the ARM processor on a phone, rather than for the x86 CPU thats likely on your development machine.

    Recently, an x86 hardware-virtualized version has been made available. This version starts up and runs considerably faster than the traditional emulator. The hardware-virtualized version will generally run on a Windows or Mac OS X machine with an Intel Core i3 or later processor that supports hardware virtualization. AMD processors are currently supported only on Linux.

    Creating an AVD that uses hardware virtualization requires that you set up Intels HAXM support first. The developer documentation provides details on the process to follow for your operating system. Make sure that you are running the latest HAXM support if youre on Mac OS X Mavericks, a recently released hotfix resolves issues there as well.

    Explore The Project Structure And Layout


    The upper left of the Android Studio window should look similar to the following diagram:

    Based on you selecting the Basic Activity template for your project, Android Studio has set up a number of files for you. You can look at the hierarchy of the files for your app in multiple ways, one is in Project view. Project view shows your files and folders structured in a way that is convenient for working with an Android project. .)

  • Double-click the app folder to expand the hierarchy of app files. in the screenshot.)
  • If you click Project , you can hide or show the Project view. You might need to select View > Tool Windows to see this option.
  • The current Project view selection is Project > Android.
  • In the Project > Android view you see three or four top-level folders below your app folder: manifests, java, java and res. You may not see java right away.

  • Expand the manifests folder.
  • This folder contains AndroidManifest.xml. This file describes all the components of your Android app and is read by the Android runtime system when your app is executed. 2. Expand the java folder. All your Java language files are organized here. The java folder contains three subfolders:

    com.example.myfirstapp: This folder contains the Java source code files for your app.

    com.example.myfirstapp : This folder is where you would put your instrumented tests, which are tests that run on an Android device. It starts out with a skeleton test file.

    drawable: All your app’s images will be stored in this folder.

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    Run Your App On Your New Emulator

  • In Android Studio, select Run > Run âapp’ or click the Run icon in the toolbar. The icon will change when your app is already running.
  • If you get a dialog box stating “Instant Run requires that the platform corresponding to your target device is installed” go ahead and click Install and continue.

  • In Run > Select Device, under Available devices, select the virtual device that you just configured. This menu also appears in the toolbar.
  • The emulator starts and boots just like a physical device. Depending on the speed of your computer, this may take a while. You can look in the small horizontal status bar at the very bottom of Android Studio for messages to see the progress.

    Messages that might appear briefly in the status bar

    Gradle build running

    Waiting for target device to come on line

    Installing APK

    Launching activity

    Once your app builds and the emulator is ready, Android Studio uploads the app to the emulator and runs it. You should see your app as shown in the following screenshot.

    Note: It is a good practice to start the emulator at the beginning of your session. Don’t close the emulator until you are done testing your app, so that you don’t have to wait for the emulator to boot again. Also, don’t have more than one emulator running at once, to reduce memory usage.

    Loading An Existing Application Into Eclipse

    Once the Android development tools have been installed, you may wish to import an existing project, such as the for our sample app. In Eclipse, go to File Import in the menu, which will display the following dialog:

    Once youve chosen the option to import an existing Android project, click the Next button, whereupon you will be able to specify the directory where the code that you wish to work with in Eclipse is located.

    Once youve selected a directory via the Browse button, Eclipse will automatically find any Android project in that directory and show it in the list of projects to import. Simply click the Finish button, and the project will appear in your list of projects along the left side of the IDE.

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    Sharing Your Application With Others

    Submitting an application to Google Play is beyond the scope of this article. The documentation provides an overview of the process. You can also use the export wizard in Eclipse to export an APK file. The resulting APK file can then be shared with others outside of Google Play via open distribution, and it is very useful when sharing copies of your application for testing prior to general release.

    Updating The Apps Version Number

    How to Make a Free Android app – Publish in play store – Step by Step

    The default version number of the app is 1.0.0.To update it, navigate to the pubspec.yaml fileand update the following line:

    version: 1.0.0+1

    The version number is three numbers separated by dots,such as 1.0.0 in the example above, followed by an optionalbuild number such as 1 in the example above, separated by a +.

    Both the version and the build number may be overridden in Fluttersbuild by specifying –build-name and –build-number, respectively.

    In Android, build-name is used as versionName whilebuild-number used as versionCode. For more information,see Version your app in the Android documentation.

    After updating the version number in the pubspec file,run flutter pub get from the top of the project, oruse the Pub get button in your IDE. This updatesthe versionName and versionCode in the file,which are later updated in the build.gradle file when yourebuild the Flutter app.

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