Creating Your First Android Project – Beginning Android Development – Your First Kotlin Android App

Android app development all starts with the creation of a project in Android studio. This video walks you the process of creating your own very first project.

About www.raywenderlich.com:

raywenderlich.com is a website focused on developing high quality programming tutorials. Our goal is to take the coolest and most challenging topics and make them easy for everyone to learn – so we can all make amazing apps.

We are also focused on developing a strong community. Our goal is to help each other reach our dreams through friendship and cooperation. As you can see below, a bunch of us have joined forces to make this happen: authors, editors, subject matter experts, app reviewers, and most importantly our amazing readers!

Kotlin is a statically typed programming language that runs on the Java virtual machine and also can be compiled to JavaScript source code or use the LLVM compiler infrastructure. Its primary development is from a team of JetBrains programmers based in Saint Petersburg, Russia.[2] While the syntax is not compatible with Java, Kotlin is designed to interoperate with Java code and is reliant on Java code from the existing Java Class Library, such as the collections framework. Kotlin uses aggressive type inference to determine the type of values and expressions for which type has been left unstated. This reduces language verbosity relative to Java, which demands often entirely redundant type specifications.

As of Android Studio 3.0 (October 2017) Kotlin is a fully supported programming language by Google on the Android Operating System[3], and is directly included in the Android Studio 3.0 IDE package as an alternative to the standard Java compiler. The Android Kotlin compiler lets the user choose between targeting Java 6- or Java 8-compatible bytecode.

Philosophy

Development lead Andrey Breslav has said that Kotlin is designed to be an industrial-strength object-oriented language, and a “better language” than Java, but still be fully interoperable with Java code, allowing companies to make a gradual migration from Java to Kotlin.

Semicolons are optional as a statement terminator; in most cases a newline is sufficient for the compiler to deduce that the statement has ended.

Kotlin variable declarations and parameter lists have the data type come after the variable name (and with a colon separator), similar to Pascal.

Variables in Kotlin can be immutable, declared with the val keyword or mutable, declared with the var keyword.

Class members are public by default, and the classes themselves are sealed by default meaning that creating a derive class is disabled without requiring explicit keywords in the base class to enable it.

In addition to the classes and methods (called member functions in Kotlin) of object-oriented programming, Kotlin also supports procedural programming with the use of functions.

About Android

Android is a mobile operating system developed by Google, based on a modified version of the Linux kernel and other open source software and designed primarily for touchscreen mobile devices such as smartphones and tablets. In addition, Google has further developed Android TV for televisions, Android Auto for cars, and Android Wear for wrist watches, each with a specialized user interface. Variants of Android are also used on game consoles, digital cameras, PCs and other electronics.

Initially developed by Android Inc., which Google bought in 2005, Android was unveiled in 2007, with the first commercial Android device launched in September 2008. The operating system has since gone through multiple major releases, with the current version being 8.1 “Oreo”, released in December 2017.

Android has been the best-selling OS worldwide on smartphones since 2011 and on tablets since 2013. As of May 2017, it has over two billion monthly active users, the largest installed base of any operating system, and as of 2017, the Google Play store features over 3.5 million apps.

Introduction to Auto Layout in iOS – raywenderlich.com

In this video tutorial, you’ll understand the very basics of what goes into Auto Layout.

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About www.raywenderlich.com:

raywenderlich.com is a website focused on developing high quality programming tutorials. Our goal is to take the coolest and most challenging topics and make them easy for everyone to learn – so we can all make amazing apps.

We are also focused on developing a strong community. Our goal is to help each other reach our dreams through friendship and cooperation. As you can see below, a bunch of us have joined forces to make this happen: authors, editors, subject matter experts, app reviewers, and most importantly our amazing readers!

—-

From Apple’s documentation

(https://developer.apple.com/library/content/documentation/UserExperience/Conceptual/AutolayoutPG/)

Auto Layout dynamically calculates the size and position of all the views in your view hierarchy, based on constraints placed on those views. For example, you can constrain a button so that it is horizontally centered with an Image view and so that the button’s top edge always remains 8 points below the image’s bottom. If the image view’s size or position changes, the button’s position automatically adjusts to match.

This constraint-based approach to design allows you to build user interfaces that dynamically respond to both internal and external changes.

External Changes

External changes occur when the size or shape of your superview changes. With each change, you must update the layout of your view hierarchy to best use the available space. Here are some common sources of external change:

The user resizes the window (OS X).

The user enters or leaves Split View on an iPad (iOS).

The device rotates (iOS).

The active call and audio recording bars appear or disappear (iOS).

You want to support different size classes.

You want to support different screen sizes.

Most of these changes can occur at runtime, and they require a dynamic response from your app. Others, like support for different screen sizes, represent the app adapting to different environments. Even through the screen size won’t typically change at runtime, creating an adaptive interface lets your app run equally well on an iPhone 4S, an iPhone 6 Plus, or even an iPad. Auto Layout is also a key component for supporting Slide Over and Split Views on the iPad.

Internal Changes

Internal changes occur when the size of the views or controls in your user interface change.

Here are some common sources of internal change:

The content displayed by the app changes.

The app supports internationalization.

The app supports Dynamic Type (iOS).

When your app’s content changes, the new content may require a different layout than the old. This commonly occurs in apps that display text or images. For example, a news app needs to adjust its layout based on the size of the individual news articles. Similarly, a photo collage must handle a wide range of image sizes and aspect ratios.

Internationalization is the process of making your app able to adapt to different languages, regions, and cultures. The layout of an internationalized app must take these differences into account and appear correctly in all the languages and regions that the app supports.

Internationalization has three main effects on layout. First, when you translate your user interface into a different language, the labels require a different amount of space. German, for example, typically requires considerably more space than English. Japanese frequently requires much less.

Second, the format used to represent dates and numbers can change from region to region, even if the language does not change. Although these changes are typically more subtle than the language changes, the user interface still needs to adapt to the slight variation in size.

Third, changing the language can affect not just the size of the text, but the organization of the layout as well. Different languages use different layout directions. English, for example, uses a left-to-right layout direction, and Arabic and Hebrew use a right-to-left layout direction. In general, the order of the user interface elements should match the layout direction. If a button is in the bottom-right corner of the view in English, it should be in the bottom left in Arabic.

Finally, if your iOS app supports dynamic type, the user can change the font size used in your app. This can change both the height and the width of any textual elements in your user interface. If the user changes the font size while your app is running, both the fonts and the layout must adapt.

Channel: raywenderlich.com
Published: 2017-02-08 23:25:25
Duration: 5M10S
Views: 5744
Likes: 45
Favorites: 0

How To Run Android App On Real Phone Via USB Debugging In Hindi

In This video I am explaining that how to run your android studio application on android phone directly via USB debugging and also explain that how to enable developers option in your android phone
Channel: AndroJava Tech4U
Published: 2017-09-15 16:58:17
Duration: 10M15S
Views: 7355
Likes: 57
Favorites: 0

Running Your First Android Project – Beginning Android Development – Your First Kotlin Android App

Once you’ve created your first project, the next thing you’ll want to do is actually run it. Thankfully, you don’t need to own a device. Android comes with its own virtual devices for you to use.

About www.raywenderlich.com:

raywenderlich.com is a website focused on developing high quality programming tutorials. Our goal is to take the coolest and most challenging topics and make them easy for everyone to learn – so we can all make amazing apps.

We are also focused on developing a strong community. Our goal is to help each other reach our dreams through friendship and cooperation. As you can see below, a bunch of us have joined forces to make this happen: authors, editors, subject matter experts, app reviewers, and most importantly our amazing readers!

Kotlin is a statically typed programming language that runs on the Java virtual machine and also can be compiled to JavaScript source code or use the LLVM compiler infrastructure. Its primary development is from a team of JetBrains programmers based in Saint Petersburg, Russia.[2] While the syntax is not compatible with Java, Kotlin is designed to interoperate with Java code and is reliant on Java code from the existing Java Class Library, such as the collections framework. Kotlin uses aggressive type inference to determine the type of values and expressions for which type has been left unstated. This reduces language verbosity relative to Java, which demands often entirely redundant type specifications.

As of Android Studio 3.0 (October 2017) Kotlin is a fully supported programming language by Google on the Android Operating System[3], and is directly included in the Android Studio 3.0 IDE package as an alternative to the standard Java compiler. The Android Kotlin compiler lets the user choose between targeting Java 6- or Java 8-compatible bytecode.

Philosophy

Development lead Andrey Breslav has said that Kotlin is designed to be an industrial-strength object-oriented language, and a “better language” than Java, but still be fully interoperable with Java code, allowing companies to make a gradual migration from Java to Kotlin.

Semicolons are optional as a statement terminator; in most cases a newline is sufficient for the compiler to deduce that the statement has ended.

Kotlin variable declarations and parameter lists have the data type come after the variable name (and with a colon separator), similar to Pascal.

Variables in Kotlin can be immutable, declared with the val keyword or mutable, declared with the var keyword.

Class members are public by default, and the classes themselves are sealed by default meaning that creating a derive class is disabled without requiring explicit keywords in the base class to enable it.

In addition to the classes and methods (called member functions in Kotlin) of object-oriented programming, Kotlin also supports procedural programming with the use of functions.

About Android

Android is a mobile operating system developed by Google, based on a modified version of the Linux kernel and other open source software and designed primarily for touchscreen mobile devices such as smartphones and tablets. In addition, Google has further developed Android TV for televisions, Android Auto for cars, and Android Wear for wrist watches, each with a specialized user interface. Variants of Android are also used on game consoles, digital cameras, PCs and other electronics.

Initially developed by Android Inc., which Google bought in 2005, Android was unveiled in 2007, with the first commercial Android device launched in September 2008. The operating system has since gone through multiple major releases, with the current version being 8.1 “Oreo”, released in December 2017.

Android has been the best-selling OS worldwide on smartphones since 2011 and on tablets since 2013. As of May 2017, it has over two billion monthly active users, the largest installed base of any operating system, and as of 2017, the Google Play store features over 3.5 million apps.

Channel: raywenderlich.com
Published: 2018-03-22 19:17:16
Duration: 5M21S
Views: 21
Likes: 2
Favorites: 0

Installing Android Studio – Beginning Android Development – Your First Kotlin Android App

The first thing you need to do to get started with Android development is to download Android Studio. Of course, downloading Android Studio isn’t so much about clicking a link, but also making sure Java is installed as well.

About www.raywenderlich.com:

raywenderlich.com is a website focused on developing high quality programming tutorials. Our goal is to take the coolest and most challenging topics and make them easy for everyone to learn – so we can all make amazing apps.

We are also focused on developing a strong community. Our goal is to help each other reach our dreams through friendship and cooperation. As you can see below, a bunch of us have joined forces to make this happen: authors, editors, subject matter experts, app reviewers, and most importantly our amazing readers!

Kotlin is a statically typed programming language that runs on the Java virtual machine and also can be compiled to JavaScript source code or use the LLVM compiler infrastructure. Its primary development is from a team of JetBrains programmers based in Saint Petersburg, Russia.[2] While the syntax is not compatible with Java, Kotlin is designed to interoperate with Java code and is reliant on Java code from the existing Java Class Library, such as the collections framework. Kotlin uses aggressive type inference to determine the type of values and expressions for which type has been left unstated. This reduces language verbosity relative to Java, which demands often entirely redundant type specifications.

As of Android Studio 3.0 (October 2017) Kotlin is a fully supported programming language by Google on the Android Operating System[3], and is directly included in the Android Studio 3.0 IDE package as an alternative to the standard Java compiler. The Android Kotlin compiler lets the user choose between targeting Java 6- or Java 8-compatible bytecode.

Philosophy

Development lead Andrey Breslav has said that Kotlin is designed to be an industrial-strength object-oriented language, and a “better language” than Java, but still be fully interoperable with Java code, allowing companies to make a gradual migration from Java to Kotlin.

Semicolons are optional as a statement terminator; in most cases a newline is sufficient for the compiler to deduce that the statement has ended.

Kotlin variable declarations and parameter lists have the data type come after the variable name (and with a colon separator), similar to Pascal.

Variables in Kotlin can be immutable, declared with the val keyword or mutable, declared with the var keyword.

Class members are public by default, and the classes themselves are sealed by default meaning that creating a derive class is disabled without requiring explicit keywords in the base class to enable it.

In addition to the classes and methods (called member functions in Kotlin) of object-oriented programming, Kotlin also supports procedural programming with the use of functions.

About Android

Android is a mobile operating system developed by Google, based on a modified version of the Linux kernel and other open source software and designed primarily for touchscreen mobile devices such as smartphones and tablets. In addition, Google has further developed Android TV for televisions, Android Auto for cars, and Android Wear for wrist watches, each with a specialized user interface. Variants of Android are also used on game consoles, digital cameras, PCs and other electronics.

Initially developed by Android Inc., which Google bought in 2005, Android was unveiled in 2007, with the first commercial Android device launched in September 2008. The operating system has since gone through multiple major releases, with the current version being 8.1 “Oreo”, released in December 2017.

Android has been the best-selling OS worldwide on smartphones since 2011 and on tablets since 2013. As of May 2017, it has over two billion monthly active users, the largest installed base of any operating system, and as of 2017, the Google Play store features over 3.5 million apps.

Channel: raywenderlich.com
Published: 2018-03-22 19:08:58
Duration: 3M20S
Views: 68
Likes: 2
Favorites: 0

Kotlin Project – Ktor API

In this tutorial, we build a kotlin API using Ktor

Source Code: https://github.com/tensor-programming/kotlin_api

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Channel: Tensor Programming
Published: 2018-02-03 01:15:37
Duration: 16M22S
Views: 371
Likes: 6
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