Android

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TextView and EditText in Android

1. How to use simple TextView in android Write this code in .xml file <LinearLayout xmlns:android="http://schemas.android.com/apk/res/android" xmlns:app="http://schemas.android.com/apk/res-auto" xmlns:tools="http://schemas.android.com/tools" android:layout_width="...

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Primary

Lesson 10: Stopping and Restarting an Activity

Properly stopping and restarting your activity is an important process in the activity lifecycle that ensures your users perceive that your app is always alive and doesn't lose their progress. There are a few of key scenarios in which your activity is stopped and restarted: The user opens...

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Primary

Lesson 9: Pausing and Resuming an Activity

During normal app use, the app sometimes loses focus, causing the activity to pause. For example, when apps run in multi-window mode, only one of the apps has the focus at any time; the system pauses all other apps. Similarly, when a semi-transparent activity opens (such as one in the...

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Primary

Lesson 8: Starting an Activity

Unlike other programming paradigms in which apps are launched with a main() method, the Android system initiates code in an Activity instance by invoking specific callback methods that correspond to specific stages of its lifecycle. There is a sequence of callback methods that start up an activity and a sequence...

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Lesson 7: Supporting Different Platform Versions

While the latest versions of Android often provide great APIs for your app, you should continue to support older versions of Android until more devices get updated. This lesson shows you how to take advantage of the latest APIs while continuing to support older versions as well. The dashboard for...

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Primary

Lesson 6: Supporting Different Screens

Android categorizes device screens using two general properties: size and density. You should expect that your app will be installed on devices with screens that range in both size and density. As such, you should include some alternative resources that optimize your app’s appearance for different screen sizes and...

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Primary

Lesson 5: Supporting Different Languages

It’s always a good practice to extract UI strings from your app code and keep them in an external file. Android makes this easy with a resources directory in each Android project. If you created your project using the Android SDK Tools (read Creating an Android Project), the tools...

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Wiki

C/C++ Compiler (gcc) for Android - Run C/C++ programs on Android

C4droid is a user-friendly (but powerful) C/C++ IDE + C/C++ compiler for Android. Basic features of C4droid: * Offline C compiler: create your own applications on Android device and run them even without Internet access * Source code editor with syntax highlighting, tabs, code completion, code formatting, file association and undo/...

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Wiki

How to cast / project your Android / Windows Phone screen to a Windows 10 PC [without any 3rd party software]

The Windows 10 Anniversary Update introduces a new Connect app which lets users cast their Android or Windows 10 Mobile’s screen to their Windows 10 PC. Android users: The procedure is relatively simple and goes as follows for Android users: 1. Open the notifications center on your Android phone...

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Android

Lesson 4: Starting Another Activity

After completing the previous lesson, you have an app that shows an activity (a single screen) with a text field and a button. In this lesson, you’ll add some code to MainActivity that starts a new activity when the user clicks the Send button. Respond to the Send Button...

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Android

Lesson 3: Building a Simple User Interface

In this lesson, you create a layout in XML that includes a text field and a button. In the next lesson, your app responds when the button is pressed by sending the content of the text field to another activity. The graphical user interface for an Android app is built...

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Android

Lesson 2:Running your App

In the previous lesson [https://developerinsider.co/lesson-1-create-an-android-project/], you created an Android project that displays "Hello World." You can now run the app on a real device or on an emulator. If you don't have a real device available, skip to Run on an Emulator. Run...

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Android

Lesson 1: Create an Android Project

This lesson shows you how to create a new Android project with Android Studio and describes some of the files in the project. In Android Studio, create a new project: If you don't have a project opened, in the Welcome to Android Studio window, click Start a new...

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Tech

UWP porting guidance for Android and iOS developers

Microsoft introduce a new app development concept map for app developers that aligns software development concepts across the iOS, Android, and Windows platforms. App developers new to Windows 10, who are already familiar with Android or iOS, will be able to use this reference to quickly orient themselves on building...