Mobile applications using android

How to Install Android Applications in Mobile Phone without USB Cables using Android Studio?

Android Studio is the official integrated development environment for Google’s Android operating system, built on JetBrains’ IntelliJ IDEA software and designed specifically for Android app development . After successfully Setting up an Android project, and write down the necessary codes the next task is to run the application on an emulator or on a mobile phone to test whether the application is running fine or not. It’s very much easy to run the application on an emulator and to run the application on the mobile phone we have to connect our mobile phones with the PC via USB cables. Sometimes wire mesh creates a problem. To install or Debug the app wireless on the Physical Device, Android Studio provides a Plugin called Android Wifi ADB. Below is the step-by-step process to install the app on the mobile phone without USB cable.

Step 1: Open Android Studio and click on the Tools menu button as shown below.

Step 2: Now click on the SDK MANAGER as shown below.

Step 3: A new window will be open then click on Plugins as shown below in the figure.

Step 4: Again a new screen opens, then click on MarketPlace as shown below.

Step 5: After clicking on MarketPlace, type “Android Wifi ADB” in Search Box and click on the Install button and wait for download(Make sure the PC connected with internet) as shown below.

Step 6: After successful downloading click on the Restart IDE button for Restart the Android Studio as shown below.

Step 7: After Restart the Android studio, connect your device using a USB cable, and click on the Android Wifi ADB (Right Side of IDE) as shown below.

Step 8: After clicking on the Android Wifi ADB a new tab will be opened. Make sure the PC connected with your device Hotspot. Then click on the Connect button.

Step 9: In the last step disconnect your USB cable and enjoy deploying, running, and debugging the applications over Wi-Fi. Press the Play button to run the app on the device.

Note: Every time when Android Studio started, the device needs to be connected with a USB cable for the first time. After connecting your device you can remove the USB cable.

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Mobile Application Development

What is mobile application development?

Mobile application development is the process to making software for smartphones and digital assistants, most commonly for Android and iOS. The software can be preinstalled on the device, downloaded from a mobile app store or accessed through a mobile web browser. The programming and markup languages used for this kind of software development include Java, Swift, C# and HTML5.

Mobile app development is rapidly growing. From retail, telecommunications and e-commerce to insurance, healthcare and government, organizations across industries must meet user expectations for real-time, convenient ways to conduct transactions and access information. Today, mobile devices—and the mobile applications that unlock their value—are the most popular way for people and businesses to connect to the internet. To stay relevant, responsive and successful, organizations need to develop the mobile applications that their customers, partners and employees demand.

Yet mobile application development might seem daunting. Once you’ve selected the OS platform or platforms, you need to overcome the limitations of mobile devices and usher your app all the way past the potential hurdles of distribution. Fortunately, by following a few basic guidelines and best practices, you can streamline your application development journey.

To learn more about the specifics of mobile application development on either platform, read our articles on iOS app development and Android app development.

Choose a platform

Many independent application development teams choose to build their apps for Android first. Why? The vast majority—around 70 percent—of smartphones run Android, and the Google Play Store has fewer restrictions than the Apple App Store. On the other hand, mobile applications developed for iOS have far fewer devices that need support, making optimization simpler. And user retention is typically higher for iOS applications.

Depending on the intended use case and target audience for the mobile application you are developing, you might have other considerations. For example, if you’re designing an app for your organization’s employees, you’ll need to support the platforms they use, which may mean developing cross-platform apps that work for both Android and iOS. Or if you’re building a mobile application for your customers and you know the majority of them use iPhones, then developing iOS applications should be a top priority. Additional considerations when developing your mobile applications include monetization strategies and anticipated user behavior, which can be influenced by geographical and cultural factors.

Enhance efficiency and tighten security by integrating the development platform and device management tool

Develop for both Android and iOS: Native apps or hybrid apps?

Let’s say you need to do mobile application development for both the Android operating system and iOS. What is the best software development approach?

You could develop two native applications. Taking advantage of native APIs and OS-specific programming languages can help you build a powerful app. Most enterprise apps, especially ones that require substantial API traffic, benefit from native development.

If you decide to develop native applications one at a time, you’ll likely want to begin with Android—for some of the same reasons that independent app developers often focus on Android. You’ll probably have better luck developing the full application as an MVP on Android and then converting and optimizing it to iOS after release.

You will still need to debug and rewrite the code for the native language and redesign the front-end user interface, because the two operating systems function very differently, making cross-platform operation impossible.

So why not start completely from scratch? While you can’t simply translate the code into a new programming language, much of the back end can be replicated cross-platform. Frameworks, libraries and third-party extensions often function identically in both environments, allowing you to avoid costly reworking. You can also use a prebuilt mobile cloud service, such as IBM Mobile Foundation, to manage the web back end.

Another option is to go hybrid, taking a write-once-run-anywhere approach. Hybrid apps use a single codebase that can function on either platform. They’re typically coded in a programming language that’s universally recognized, such as Java, JavaScript, HTML or CSS. Because you’re denied access to the operating system’s native APIs, hybrid mobile application development works best for simple web applications—three- or four-page mobile applications with limited functionality.

Think light: Building for a mobile platform

Whether you choose native or hybrid mobile application development, one of the first hurdles you’ll need to overcome is the relatively limited resources on mobile devices. Your target mobile device will have much less processing power and memory than desktop computers or enterprise servers. These constraints might seem like a significant challenge, especially if you’re more familiar with the comparatively boundless resources for conventional software development for web apps.

Limited mobile platform resources mean you need to adjust your goals for your app design.

Throughout the mobile application development process, developers must work to ensure that their mobile app is less resource intensive than a typical desktop application.

Delivering a great user experience is vital. That starts with understanding that your user interface for a mobile app should be simpler than a desktop application interface. By creating a straightforward UX design that is focused on critical functions, you can provide a better user experience while consuming fewer resources.

Your mobile app interface should be designed for touch. Mobile users must be able to navigate your app easily and provide input without excessive typing.

Fortunately, these requirements for efficient, simple touch-based apps map well to user expectations. Mobile users generally want to accomplish tasks simply, with just a few taps. They want apps that are above all fast, convenient and easy to use on their mobile devices.

Offload processing to the cloud

What if your mobile application requires more processing than a typical mobile platform can support? Consider offloading that processing to the cloud.

Through the judicious use of APIs, you can connect your app to cloud-based services and databases to provide advanced functionality without slowing your application or straining the device it is running on. You can even offload data storage and caching to a cloud-based server, leaving very little data on the device.

Extend your app with advanced cloud services

The cloud can offer additional advantages beyond performance boosts. Connect your mobile application to powerful cloud services to add features and improve usability. Employ APIs to integrate new features, such as advanced cloud-based services that can help you enhance your mobile apps. These include push notifications, IBM Watson®-powered AI analytics, Internet of Things (IoT) smart device integration and more.

Join a developer program

Neither Android nor iOS is a completely open environment. Before your application can be officially distributed, you’ll need to join the appropriate developer program.

The Android mobile application development program lets you use your existing Google account to create a developer account, pay the USD 25 fee and submit your application. Google Play, the official Android store, does have quality standards that must be met prior to publication, but they’re more guidelines than actual rules. As part of your app development process, you can also distribute your applications outside the Google Play store and allow users to directly download and install them.

By contrast, the Apple mobile application development program sets a high barrier to entry. You need to pay a program fee of USD 99 per year and adhere to high standards. Once you’re a member of the program, you get early access to beta versions of the operating systems and proprietary frameworks or APIs. Meeting the high standards for the App Store also signifies to the world that you’ve developed a high-quality app.

Mobile application development and IBM Cloud

Mobile application development is necessary for most enterprises. When you build your application with both operating systems in mind, try to make judicious use of APIs and understand the specifics of the required developer programs. That approach will help you deliver to your users an app that’s flexible, convenient and lightweight—the perfect way to serve information or services—along with an excellent user experience.

To help mobile app developers, IBM Cloud offers a variety of solutions, including IBM Cloud App ID, which allows you to add authentication and back-end security, and IBM Push Notifications, which lets you send personalized real-time messages to mobile applications.

To learn more about the specifics of mobile application development on either platform, read our articles on iOS app development and Android app development.

To help you explore mobile application development, IBM offers a simple tutorial on building a voice-enabled Android-based chatbot.

Learn about the features and capabilities of the IBM Mobile Foundation, in addition to IBM Push Notifications through the Introduction to Mobile Foundation course in the IBM Cloud Professional Developer curriculum.

If you are ready to start using IBM Cloud today, sign up here.

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Создаем приложение для ANDROID быстро и просто

Сегодня я хотел бы поделиться с Вами, как быстро и просто можно создать приложение для Android с базовыми знаниями HTML CSS и JS. По данному примеру код на Java для Android будет минимальным. Благодаря платформе XAMARIN приложения для мобильных телефонов можно делать в Visual Studio.

▍Шаг 1 — Переходим на сайт и Скачиваем бесплатную версию Community.

▍Шаг 2 — Запускаем установку и выбираем параметры. Нас интересует XAMARIN. Но Вы также можете выбрать другие параметры.

После успешной установки мы можем создать свой первый проект.

▍Шаг 3 — Запускаем Visual Studio. Создать проект. В фильтре пишем xamarin, платформа Android, язык c# (Если желаете другой язык можете его выбрать)

▍Шаг 4 — Далее. Указываете имя для своего приложения, выбираете каталог где его сохранить. Создать.

▍Шаг 5 — Указываем пустое приложение и выбираем минимальную версию андроида для запуска этого приложения.

▍Шаг 6 — Жмем ок. Visual Studio автоматически создает код для приложения

Мы можем его запустить в эмуляторе, который идет комплекте с Visual Studio нажав клавишу F5.

▍Шаг 7 — Теперь немного модифицируем код. В данном случае мы вообще не будем использовать Java. Так как мы будем кодить на C#.

Приводим код к такому виду. Здесь мы создаем WebView контейнер который будет грузить локальный HTML файл, который находится в проекте в папке Assets.

▍Шаг 8 — Создадим там папку Content.

▍Шаг 9 — Добавим в папку Content файл login.html

▍Шаг 10 — Далее уже пишем на привычном нам HTML CSS JS. Можем нажать на F5 и увидеть результат нашей работы.

По такому принципу можно создать приложение быстро и просто. Файлы html будут выглядеть одинаково на всех устройствах. То есть, Вы можете сделать приложения для Android и iOS с одинаковым интерфейсом. Не надо изучать сложные языки разметки, не надо изучать сложные макеты (сториборды) на iOS. Все можно сделать на HTML.

В идеале, вместо локальных файлов можно сделать загрузку со стороннего сайта. В этом случае Вы можете менять контент приложения без его обновления в AppStore и Google Play.

Q: Но как быть с функциями самой платформы? Пуш сообщения? Как взаимодействовать с самой платформой?

Все очень просто! JavaScript можно использовать для вызова функций Android:

▍Шаг 1 — Немного модифицируем наш файл MainActivity

▍Шаг 2 — Далее создаем класс JavaScriptInterface на который будет ругаться Visual Studio

Мы видим, что теперь программа ругается на Export так как не знает что это такое.

▍Шаг 3 — Добавим нужную библиотеку

▍Шаг 4 — В фильтре напишем mono

▍Шаг 5 — Найдем Export и поставим галочку

▍Шаг 6 — Жмем ок и видим что ошибка пропала.

Так вы можете подключать библиотеки если вдруг Visual Studio ругается на что то.

Данная функция это показ всплывающей информации на экране. Она выполняется именно на платформе Андроида. То есть мы можем написать в HTML файле вызов функции Андроида. Получается полное дружелюбие двух платформ по JavaScript интерфейсу. Данные можно передавать туда сюда. Вызывать переход от одной активити в другую. Все через HTML + JavaScript.

Немного модифицируем файл login.htm:

Теперь при нажатии на кнопку HTML вызывается функция Toast андроида и выводиться сообщение пользователю.

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