The document discusses Android activities and fragments. It defines an activity as representing a single screen with a user interface. It notes that an app may have multiple activities for different screens like email lists, compose, and read. It then discusses the activity lifecycle and callbacks like onCreate(), onStart(), onResume(), etc. It provides an example logging the lifecycle. It defines a fragment as a modular piece of UI/behavior that can be placed in an activity. It discusses combining fragments in different configurations for tablets vs phones. It also covers the fragment lifecycle and provides an example creating two fragments for landscape and portrait orientations.
Android development - Activities, Views & IntentsLope Emano
Activities provide screens for user interaction and have lifecycles to manage memory. The lifecycle involves states like active, paused, stopped which trigger callbacks like onCreate(), onStart(), onPause(). Views are UI components like TextView and occupy a rectangular area, with attributes like width, height. ViewGroups arrange views and include LinearLayout and RelativeLayout. Input events like clicks are handled via listeners. Intents launch other activities by specifying the class and optional data.
Fragments represent reusable portions of user interface in an activity. An activity can host multiple fragments that the user can navigate between. Fragment transactions allow adding, replacing, and removing fragments within an activity. Fragments can communicate with each other using interfaces to pass data between fragments hosted by the same activity.
[/SUMMARY]
This document provides an overview of key Android concepts including:
- Android's history and version timeline from 1.0 to Oreo.
- The Android activity lifecycle including methods like onCreate(), onStart(), onResume(), etc.
- What fragments are in Android and their core lifecycle methods.
- Different types of layouts that can be used in an Android app like RelativeLayout, LinearLayout, etc.
- How to integrate APIs and handle network requests and responses in an Android app.
It also provides code examples and tips for beginners on resources for learning Android development.
The document discusses the basic components of Android applications:
- Activities represent single screens and user interfaces. The first activity launched is the entry point.
- Services run in the background for long-running tasks like playing music.
- Broadcast receivers respond to messages from other apps and the system, like downloading completion.
- Content providers manage shared app data stored in files, databases, and more.
The document discusses the basic components of an Android app. It explains that an Android app consists of components like activities, services, broadcast receivers, and content providers. Activities provide the main user interface and common ones include launching the app and navigating within it. The app manifest file defines these components. The document also covers activities and intents, explaining how activities are launched via explicit and implicit intents and how data can be passed between activities.
Android | Android Activity Launch Modes and Tasks | Gonçalo SilvaJAX London
2011-11-02 | 03:45 PM - 04:35 PM |
Android Activities can possess one of four launch modes and one of many activity tasks. We will explore how your choices of launch modes and tasks affect your Applications back stack history and what will happen behind the scenes. After this talk you will confidently be able to wield the best launch modes for your apps activities in every situation!
This document provides an overview of Android development. It discusses the Android SDK, Dalvik VM, and differences between Android and Java APIs. It also covers key aspects of building Android apps like activities, intents, services, and UI components. Debugging, optimizations, and the anatomy of an Android app are also briefly discussed.
The document discusses the four main components of an Android application: Activities, Services, Broadcast Receivers, and Content Providers. Activities provide user interfaces and handle user interactions. Services run in the background performing long-running tasks. Broadcast Receivers listen for system-wide broadcast announcements. Content Providers manage access to structured data between applications. Each component has a defined lifecycle and purpose for building Android applications.
Android development - Activities, Views & IntentsLope Emano
Activities provide screens for user interaction and have lifecycles to manage memory. The lifecycle involves states like active, paused, stopped which trigger callbacks like onCreate(), onStart(), onPause(). Views are UI components like TextView and occupy a rectangular area, with attributes like width, height. ViewGroups arrange views and include LinearLayout and RelativeLayout. Input events like clicks are handled via listeners. Intents launch other activities by specifying the class and optional data.
Fragments represent reusable portions of user interface in an activity. An activity can host multiple fragments that the user can navigate between. Fragment transactions allow adding, replacing, and removing fragments within an activity. Fragments can communicate with each other using interfaces to pass data between fragments hosted by the same activity.
[/SUMMARY]
This document provides an overview of key Android concepts including:
- Android's history and version timeline from 1.0 to Oreo.
- The Android activity lifecycle including methods like onCreate(), onStart(), onResume(), etc.
- What fragments are in Android and their core lifecycle methods.
- Different types of layouts that can be used in an Android app like RelativeLayout, LinearLayout, etc.
- How to integrate APIs and handle network requests and responses in an Android app.
It also provides code examples and tips for beginners on resources for learning Android development.
The document discusses the basic components of Android applications:
- Activities represent single screens and user interfaces. The first activity launched is the entry point.
- Services run in the background for long-running tasks like playing music.
- Broadcast receivers respond to messages from other apps and the system, like downloading completion.
- Content providers manage shared app data stored in files, databases, and more.
The document discusses the basic components of an Android app. It explains that an Android app consists of components like activities, services, broadcast receivers, and content providers. Activities provide the main user interface and common ones include launching the app and navigating within it. The app manifest file defines these components. The document also covers activities and intents, explaining how activities are launched via explicit and implicit intents and how data can be passed between activities.
Android | Android Activity Launch Modes and Tasks | Gonçalo SilvaJAX London
2011-11-02 | 03:45 PM - 04:35 PM |
Android Activities can possess one of four launch modes and one of many activity tasks. We will explore how your choices of launch modes and tasks affect your Applications back stack history and what will happen behind the scenes. After this talk you will confidently be able to wield the best launch modes for your apps activities in every situation!
This document provides an overview of Android development. It discusses the Android SDK, Dalvik VM, and differences between Android and Java APIs. It also covers key aspects of building Android apps like activities, intents, services, and UI components. Debugging, optimizations, and the anatomy of an Android app are also briefly discussed.
The document discusses the four main components of an Android application: Activities, Services, Broadcast Receivers, and Content Providers. Activities provide user interfaces and handle user interactions. Services run in the background performing long-running tasks. Broadcast Receivers listen for system-wide broadcast announcements. Content Providers manage access to structured data between applications. Each component has a defined lifecycle and purpose for building Android applications.
This document provides an overview of the Android platform, including: an introduction to Android and its history; descriptions of the Android architecture which is based on the Linux kernel; the core applications and development tools used to build Android apps; and the basic building blocks like activities, services, and content providers that make up an Android app. It also discusses the anatomy and lifecycle of an Android app and provides screenshots of example apps.
This document provides instructions for setting up an environment for Android development. It discusses downloading and installing the Java Development Kit (JDK), Android SDK, and Android Studio. It also covers configuring a real Android device or emulator for testing apps. The document demonstrates creating a basic "Hello World" Android app in Android Studio and reviewing the underlying code and manifest file. It then briefly describes a more advanced app that scans for nearby WiFi access points when a button is pressed.
Raman Pandey's presentation discusses the basics of Android app development, including:
- Android is an open source operating system for mobile devices based on Linux.
- Java programming knowledge and software like Java JDK, Android SDK, and Android Studio are prerequisites.
- The Android architecture includes layers like applications, application framework, libraries and the Linux kernel.
- Application components, resources, intents, fragments, UI layouts and the emulator are discussed as fundamental concepts.
This document discusses user interfaces for Android apps. It begins by introducing activities as the core building block of Android UI. It describes the four states an activity can be in (active, paused, stopped, destroyed) and the lifecycle methods (onCreate(), onStart(), onResume(), onPause(), onStop(), onDestroy()) that are called as the activity transitions between states. It then discusses UI resources like layout resources that define the visual structure of an activity's screens using XML files. Finally, it provides an example of a relative layout and how views can be positioned relative to each other or the overall layout.
The document describes the activity lifecycle in Android, including key methods like onCreate(), onResume(), onPause(), onStop(), and onDestroy(). It explains that onCreate() initializes the activity, onResume() makes it interactive, onPause() pauses it on switching to another activity, onStop() ends visibility, and onDestroy() ends the activity. It also provides examples of how to start a new activity using an intent and how to pass data between activities.
Google Plus SignIn : l'Authentification GoogleMathias Seguy
Cette conférence vous expliquera en détail pourquoi mettre en place cette authentification et surtout comment la mettre en place.
Vous découvrirez ainsi:
la console des GoogleService,
comment utiliser l’objet PlusClient et ConnectionResult pour gérer l’identification de votre utilisateur,
comment mettre en place la « magic connexion » et la « manual connexion »,
comment mettre en place cette authentification au sein du cycle de vie de votre application,
comment charger le graphe social de l’utilisateur, faire des posts interactifs et des « application activities »…
Un grand moment pour tous ceux qui se demandent encore quelle est la meilleure stratégie pour authentifier son utilisateur.
Cette conférence s’associe:
d’un tutorial que vous pouvez retrouver sur GitHub: SignInWithGoogleTutorial(https://github.com/MathiasSeguy-Android2EE/SignInWithGoogleTutorial) sur GitHub.
d’une application mettant en place cette authentification que vous pouvez retrouver sur GooglePlay: MyPublicGoogleProfile (https://play.google.com/store/apps/details?id=com.android2ee.project.gplus.signin.publicid&hl=fr).
Et bien sûr la conférence va être disponible sur Android2EE dès le Vendredi 20 au rayon OpenResource\Conférences.
Vous aussi, authentifiez vos utilisateurs, inter-agissez avec eux et simplifiez leur la vie:
En espérant que vous y découvrirez votre bonheur :) .
This document discusses how to add notifications, broadcast receivers, services, and sync adapters to Android apps. It covers creating basic notifications using NotificationCompat.Builder, showing notifications using the NotificationManager, and adding actions and expanded layouts to notifications. It also explains how to create broadcast receivers by extending BroadcastReceiver and registering receivers statically in the manifest or dynamically in code.
Day 4: Android: Getting Active through ActivitiesAhsanul Karim
The document discusses Android application development and activities. It covers:
- The structure of Android applications which typically consist of multiple activities with one specified as the main activity in the Android manifest.
- Activities provide an interactive screen for users to perform tasks. Creating an activity involves subclassing the Activity class and implementing callback methods like onCreate.
- The user interface of an activity is defined through layouts which can be accessed from the activity class.
- Activities can transition to one another using intents, by calling startActivity and passing an intent specifying the destination activity class.
- An example is provided to create a registration and login activity, demonstrating how to add activities and navigate between them using intents
The document discusses the UI Automator testing framework which provides APIs to build UI tests that can interact with any Android application. It describes basic UI Automator components like UiDevice, UiObject, UiCollection, UiScrollable, and UiSelector that allow interacting with views, finding elements, and automating actions. The framework supports accessing device state, rotating devices, pressing buttons, and more. It requires Android 4.3 or higher.
Introduction to the basic aspects of application development in Android. The basic components, e.g., Activity and View, are introduced along with the different configuration files, e.g., AndroidManifest.xml.
This document summarizes key concepts about graphical elements, intents, and activities in Android app development:
I. Views and ViewGroups are the basic graphical elements in Android. Views occupy screen space while ViewGroups are invisible containers that define element placement. Layouts like LinearLayout are ViewGroups that organize widgets.
II. An example app interface is created with buttons, text views, and inputs. Buttons can define click behavior via listeners, methods, or implementing interfaces. Text fields read and modify content.
III. Intents pass actions and data between app components. ExplicitIntents specify started components while ImplicitIntents declare actions. Data is passed via extras. Activities can start each other and return results via
Android App Development - 02 Activity and intentDiego Grancini
1. An Intent is used to communicate between components in Android and can be explicit or implicit. It contains an action, data, and optional extras.
2. An Activity provides a visual user interface and is started using an Intent. Each Activity has a lifecycle that must be managed by the developer.
3. The system uses Intent filters declared in the manifest to match Activities to Intents and start the correct Activity.
This document describes how to use intents in Android. It provides an overview of intents, the difference between implicit and explicit intents, how to transfer data between activities using intents, and how to register an application to respond to implicit intents using intent filters. It includes code examples for starting implicit intents to open URLs, make phone calls, and transfer data between activities using explicit intents.
Android is an open source platform developed by Google and the Open Handset Alliance for mobile devices. It consists of an operating system, middleware, and key applications. The document provides an overview of Android versions from 1.1 to 4.1 Jelly Bean and their market shares. It also discusses installing the Android Development Tools plugin for Eclipse, exploring a sample project's components, and developing applications considering different Android versions. The sample project demonstrates creating layouts, handling button clicks, launching a new activity, and registering activities in the manifest file.
Testing iOS10 Apps with Appium and its new XCUITest backendTestplus GmbH
This document discusses testing mobile apps on iOS 10 using Appium and XCUITest. XCUITest is Apple's new UI testing framework that was introduced in iOS 9 and supports iOS 9 and 10. It is based on XCTest and can be used from Objective C or Swift. The document provides an example of how to write a test case and make assertions using XCUITest. It notes that XCUITest is easy to learn but documentation is limited and it only supports iOS 9 and 10. The document also discusses Appium's work to support testing on iOS 10 simulators, including a major rewrite and new plugins.
This document discusses using Gherkin with XCUITest for iOS automation testing. It begins with an introduction to XCUITest, including recording tests, interacting with elements, and refactoring code. It then demonstrates building a simple test suite for a weather app. Finally, it shows how to implement Gherkin feature files to specify tests in a human-readable format, including steps to set up tests and make assertions. Gherkin allows for acceptance test driven development and collaboration across teams.
Android development Training Programme Day 2DHIRAJ PRAVIN
The document discusses the activity lifecycle in Android. An activity represents a single screen and has four main states: active, paused, stopped, and destroyed. The lifecycle methods like onCreate(), onStart(), onResume(), onPause(), onStop(), and onDestroy() get called as the activity transitions between these states. It provides an example of creating a simple "Hello World" Android app with one activity and using setContentView() to set the screen content. Debugging tools like DDMS and logcat can be used to view log results and debug apps.
An activity provides a screen for users to interact with an Android application. Activities are organized into a stack and have a lifecycle of states like resumed and paused. To create an activity, you subclass the Activity class and implement callback methods corresponding to lifecycle states like onCreate and onPause. Activities must be declared in the app manifest and can be started with an intent.
Day 3: Getting Active Through ActivitiesAhsanul Karim
The document discusses Android application development and activities. It covers the anatomy of an Android application including activities, services, content providers, and broadcast receivers. It also discusses the lifecycle of activities and how to create activities that load layouts and handle user interactions through callbacks like onCreate(). An example is provided of building an app with an activity to display the current time when a button is pressed to demonstrate designing user interfaces and adding interactivity.
Day 3: Getting Active Through ActivitiesAhsanul Karim
The document discusses Android application development and activities. It describes how an Android application is structured with packages like src, res, assets etc. It explains what an activity is, how it provides the user interface, and how it loads views from XML layouts. It also provides an example of creating a simple project with an activity that displays the current time when a button is pressed to demonstrate the basic concepts.
This document provides an overview of the Android platform, including: an introduction to Android and its history; descriptions of the Android architecture which is based on the Linux kernel; the core applications and development tools used to build Android apps; and the basic building blocks like activities, services, and content providers that make up an Android app. It also discusses the anatomy and lifecycle of an Android app and provides screenshots of example apps.
This document provides instructions for setting up an environment for Android development. It discusses downloading and installing the Java Development Kit (JDK), Android SDK, and Android Studio. It also covers configuring a real Android device or emulator for testing apps. The document demonstrates creating a basic "Hello World" Android app in Android Studio and reviewing the underlying code and manifest file. It then briefly describes a more advanced app that scans for nearby WiFi access points when a button is pressed.
Raman Pandey's presentation discusses the basics of Android app development, including:
- Android is an open source operating system for mobile devices based on Linux.
- Java programming knowledge and software like Java JDK, Android SDK, and Android Studio are prerequisites.
- The Android architecture includes layers like applications, application framework, libraries and the Linux kernel.
- Application components, resources, intents, fragments, UI layouts and the emulator are discussed as fundamental concepts.
This document discusses user interfaces for Android apps. It begins by introducing activities as the core building block of Android UI. It describes the four states an activity can be in (active, paused, stopped, destroyed) and the lifecycle methods (onCreate(), onStart(), onResume(), onPause(), onStop(), onDestroy()) that are called as the activity transitions between states. It then discusses UI resources like layout resources that define the visual structure of an activity's screens using XML files. Finally, it provides an example of a relative layout and how views can be positioned relative to each other or the overall layout.
The document describes the activity lifecycle in Android, including key methods like onCreate(), onResume(), onPause(), onStop(), and onDestroy(). It explains that onCreate() initializes the activity, onResume() makes it interactive, onPause() pauses it on switching to another activity, onStop() ends visibility, and onDestroy() ends the activity. It also provides examples of how to start a new activity using an intent and how to pass data between activities.
Google Plus SignIn : l'Authentification GoogleMathias Seguy
Cette conférence vous expliquera en détail pourquoi mettre en place cette authentification et surtout comment la mettre en place.
Vous découvrirez ainsi:
la console des GoogleService,
comment utiliser l’objet PlusClient et ConnectionResult pour gérer l’identification de votre utilisateur,
comment mettre en place la « magic connexion » et la « manual connexion »,
comment mettre en place cette authentification au sein du cycle de vie de votre application,
comment charger le graphe social de l’utilisateur, faire des posts interactifs et des « application activities »…
Un grand moment pour tous ceux qui se demandent encore quelle est la meilleure stratégie pour authentifier son utilisateur.
Cette conférence s’associe:
d’un tutorial que vous pouvez retrouver sur GitHub: SignInWithGoogleTutorial(https://github.com/MathiasSeguy-Android2EE/SignInWithGoogleTutorial) sur GitHub.
d’une application mettant en place cette authentification que vous pouvez retrouver sur GooglePlay: MyPublicGoogleProfile (https://play.google.com/store/apps/details?id=com.android2ee.project.gplus.signin.publicid&hl=fr).
Et bien sûr la conférence va être disponible sur Android2EE dès le Vendredi 20 au rayon OpenResource\Conférences.
Vous aussi, authentifiez vos utilisateurs, inter-agissez avec eux et simplifiez leur la vie:
En espérant que vous y découvrirez votre bonheur :) .
This document discusses how to add notifications, broadcast receivers, services, and sync adapters to Android apps. It covers creating basic notifications using NotificationCompat.Builder, showing notifications using the NotificationManager, and adding actions and expanded layouts to notifications. It also explains how to create broadcast receivers by extending BroadcastReceiver and registering receivers statically in the manifest or dynamically in code.
Day 4: Android: Getting Active through ActivitiesAhsanul Karim
The document discusses Android application development and activities. It covers:
- The structure of Android applications which typically consist of multiple activities with one specified as the main activity in the Android manifest.
- Activities provide an interactive screen for users to perform tasks. Creating an activity involves subclassing the Activity class and implementing callback methods like onCreate.
- The user interface of an activity is defined through layouts which can be accessed from the activity class.
- Activities can transition to one another using intents, by calling startActivity and passing an intent specifying the destination activity class.
- An example is provided to create a registration and login activity, demonstrating how to add activities and navigate between them using intents
The document discusses the UI Automator testing framework which provides APIs to build UI tests that can interact with any Android application. It describes basic UI Automator components like UiDevice, UiObject, UiCollection, UiScrollable, and UiSelector that allow interacting with views, finding elements, and automating actions. The framework supports accessing device state, rotating devices, pressing buttons, and more. It requires Android 4.3 or higher.
Introduction to the basic aspects of application development in Android. The basic components, e.g., Activity and View, are introduced along with the different configuration files, e.g., AndroidManifest.xml.
This document summarizes key concepts about graphical elements, intents, and activities in Android app development:
I. Views and ViewGroups are the basic graphical elements in Android. Views occupy screen space while ViewGroups are invisible containers that define element placement. Layouts like LinearLayout are ViewGroups that organize widgets.
II. An example app interface is created with buttons, text views, and inputs. Buttons can define click behavior via listeners, methods, or implementing interfaces. Text fields read and modify content.
III. Intents pass actions and data between app components. ExplicitIntents specify started components while ImplicitIntents declare actions. Data is passed via extras. Activities can start each other and return results via
Android App Development - 02 Activity and intentDiego Grancini
1. An Intent is used to communicate between components in Android and can be explicit or implicit. It contains an action, data, and optional extras.
2. An Activity provides a visual user interface and is started using an Intent. Each Activity has a lifecycle that must be managed by the developer.
3. The system uses Intent filters declared in the manifest to match Activities to Intents and start the correct Activity.
This document describes how to use intents in Android. It provides an overview of intents, the difference between implicit and explicit intents, how to transfer data between activities using intents, and how to register an application to respond to implicit intents using intent filters. It includes code examples for starting implicit intents to open URLs, make phone calls, and transfer data between activities using explicit intents.
Android is an open source platform developed by Google and the Open Handset Alliance for mobile devices. It consists of an operating system, middleware, and key applications. The document provides an overview of Android versions from 1.1 to 4.1 Jelly Bean and their market shares. It also discusses installing the Android Development Tools plugin for Eclipse, exploring a sample project's components, and developing applications considering different Android versions. The sample project demonstrates creating layouts, handling button clicks, launching a new activity, and registering activities in the manifest file.
Testing iOS10 Apps with Appium and its new XCUITest backendTestplus GmbH
This document discusses testing mobile apps on iOS 10 using Appium and XCUITest. XCUITest is Apple's new UI testing framework that was introduced in iOS 9 and supports iOS 9 and 10. It is based on XCTest and can be used from Objective C or Swift. The document provides an example of how to write a test case and make assertions using XCUITest. It notes that XCUITest is easy to learn but documentation is limited and it only supports iOS 9 and 10. The document also discusses Appium's work to support testing on iOS 10 simulators, including a major rewrite and new plugins.
This document discusses using Gherkin with XCUITest for iOS automation testing. It begins with an introduction to XCUITest, including recording tests, interacting with elements, and refactoring code. It then demonstrates building a simple test suite for a weather app. Finally, it shows how to implement Gherkin feature files to specify tests in a human-readable format, including steps to set up tests and make assertions. Gherkin allows for acceptance test driven development and collaboration across teams.
Android development Training Programme Day 2DHIRAJ PRAVIN
The document discusses the activity lifecycle in Android. An activity represents a single screen and has four main states: active, paused, stopped, and destroyed. The lifecycle methods like onCreate(), onStart(), onResume(), onPause(), onStop(), and onDestroy() get called as the activity transitions between these states. It provides an example of creating a simple "Hello World" Android app with one activity and using setContentView() to set the screen content. Debugging tools like DDMS and logcat can be used to view log results and debug apps.
An activity provides a screen for users to interact with an Android application. Activities are organized into a stack and have a lifecycle of states like resumed and paused. To create an activity, you subclass the Activity class and implement callback methods corresponding to lifecycle states like onCreate and onPause. Activities must be declared in the app manifest and can be started with an intent.
Day 3: Getting Active Through ActivitiesAhsanul Karim
The document discusses Android application development and activities. It covers the anatomy of an Android application including activities, services, content providers, and broadcast receivers. It also discusses the lifecycle of activities and how to create activities that load layouts and handle user interactions through callbacks like onCreate(). An example is provided of building an app with an activity to display the current time when a button is pressed to demonstrate designing user interfaces and adding interactivity.
Day 3: Getting Active Through ActivitiesAhsanul Karim
The document discusses Android application development and activities. It describes how an Android application is structured with packages like src, res, assets etc. It explains what an activity is, how it provides the user interface, and how it loads views from XML layouts. It also provides an example of creating a simple project with an activity that displays the current time when a button is pressed to demonstrate the basic concepts.
Android is a software stack that includes an operating system, middleware and key applications for mobile devices. It uses the Java programming language and includes features like application frameworks, SQLite for storage, and support for common media formats. The Android architecture consists of applications, an application framework, libraries and services, the Android runtime and the Linux kernel. Activities are the basic building blocks of Android apps and have a defined lifecycle of states they move through as the user interacts with the app.
The document discusses various components of an Android application. It describes the four main types of app components: Activities, Services, Broadcast Receivers, and Content Providers. It provides details about what each component type represents and how it is implemented. It also discusses some additional concepts like fragments, views, layouts, intents and resources that are involved in building Android apps.
Android activity, service, and broadcast recieversUtkarsh Mankad
The document provides an overview of creating a basic "Hello World" Android application. It discusses creating a new Android project, the typical project file structure including the src, res, assets, and AndroidManifest.xml files. It also summarizes the purpose of activities, services, and broadcast receivers as core Android application components.
This document provides an overview of getting started with Android development. It discusses downloading the necessary software, creating an Android project and basic activity, and understanding key Android building blocks like activities, intents, views, and layouts. It also demonstrates a simple "Hello World" Android app.
This document discusses various aspects of Android application development including:
- The Android platform architecture which includes the Linux kernel, Android runtime, libraries, and application framework.
- The basic components that make up an Android application including activities, services, broadcast receivers, content providers, and intents.
- How to set up the development environment and build a simple "Hello World" Android app.
- Additional Android concepts like application lifecycles, permissions, and retrieving data from the internet.
This document provides an overview of developing Android applications. It discusses key Android concepts like activities, services, and manifest files. It also outlines the steps to set up an Android development environment in Eclipse, including installing the Android SDK and ADT plugin. It describes how to create a basic Android project structure with resources like layouts defined in XML. It also covers debugging tools and techniques like Logcat logging.
The document discusses the Android application lifecycle, which describes the steps an app goes through from launch to exit. It includes starting, resuming, pausing, stopping and destroying activities. The lifecycle is managed by callbacks in the Activity class like onCreate(), onResume() and onDestroy(). An app's manifest defines its components and launcher activity using tags like <activity>, <intent-filter> and <category>.
Those who want to be familiar with Android, can easily go through this document. It will help them to learn basics. It is also useful for those who are preparing for cracking android interviews as this document is short and precise.
Android is an open source operating system used for mobile devices like smartphones and tablets. It is developed by Google and managed by the Open Handset Alliance. The Android manifest file contains important configuration settings for Android applications, including supported SDK versions, required permissions, application components and more. It determines how the application interacts with the operating system.
There are four main types of application components in Android: activities which represent a single screen in the app, services which run in the background, broadcast receivers which allow the app to respond to system-wide events, and content providers which manage shared app data. The manifest file declares these components and their permissions. The activity lifecycle handles navigating between activities, saving and restoring state, and sending data between components within and between processes.
Threads handlers and async task, widgets - day8Utkarsh Mankad
This document discusses processes and threads in Android, process lifecycles, thread management principles, and how to create and manage widgets in Android. It covers the following key points:
- Processes and threads in Android and how the main thread handles UI events.
- The 5 levels of importance for application processes and when processes are killed.
- Using handlers and AsyncTasks to perform background work without blocking the UI thread.
- The basics of widgets including the AppWidgetProviderInfo, AppWidgetProvider class, and layout.
- The steps to create a widget including declaring it in the manifest, metadata, layouts, provider class, and configuration activity.
This is a basic crash course for android development covers:
Android Studio,Hello World Application,Application Components,Application Resources,User Interface,Good UI,Play Store
The document discusses several topics related to mobile systems engineering including:
1. Data storage options for Android applications including SharedPreferences, internal storage, external storage, SQLite databases, and network connections.
2. The concept of mobile cloud computing including definitions, architectures, advantages and issues.
3. Context-aware computing including definitions, basic functions, and a layered framework.
4. The Internet of Things including definitions, characteristics, enabling technologies, and applications across various domains.
This document discusses mobile systems engineering and provides an overview of mobile devices, operating systems, and applications. It describes the evolution of computing from early computers to smartphones and defines key aspects of mobile systems including their portability, battery power, wireless connectivity, and associated constraints and characteristics compared to desktop and embedded systems. Examples of mobile applications and system architectures are provided. Popular mobile platforms like Android, iOS, Blackberry and Windows Mobile are compared in terms of their features, programming languages, and development tools.
The document discusses activities and fragments in Android. It defines an activity as representing a single screen with a user interface. Activities have a lifecycle defined by callback methods like onCreate(), onStart(), onResume(), etc. Fragments allow dividing the UI of an activity and are like sub-activities with their own layout and lifecycle. Fragments were introduced later than activities to allow multiple modular UI components within a single activity.
This document provides instructions for creating a PDF file from a Microsoft Word document using Adobe Acrobat. It outlines three exercises: 1) Using PDFMaker within Word to convert the document to a PDF, 2) Using the Print command and selecting Adobe PDF as the printer, and 3) Combining multiple existing PDF files into a single document. The steps provided for each exercise walk through selecting options like setting the conversion to Standard format and embedding fonts to create an electronic thesis or dissertation PDF.
A new channel was created that provided additional information. Data from this new channel was incorporated, adding to what was previously available. The document refers to a channel being added that included new data.
The document contains a brief instruction to type the letters "ppt" followed by the word "for" and then the word "test". It appears to be providing a short command or set of instructions but does not provide much context around its purpose or meaning. In just a few short words, it conveys the message to enter the characters "ppt for test".
This recipe provides instructions for making Gobhi Manchuri. The cauliflower is boiled, washed and cut. A batter is made from cornflour, maida, wheat flour, chili powder, ginger garlic paste, salt, color and vinegar. The cauliflower is dipped in the batter and fried. Fried onions and capsicum are added to oil in a pan along with the fried cauliflower. Various sauces including soya, tomato and chili sauces are added and then garnished with coriander.
This recipe provides instructions for making pulav, a rice dish containing mutton or chicken. The ingredients include rice, oil, onions, meat, water, ginger, garlic, mint, coriander, lemon, chilies, and spices. The mutton or chicken is cooked separately before being added to the rice along with sautéed onions and spices. The rice is boiled in water and then cooked with the meat mixture in an oven or cooker until done. A raita side dish is also included using yogurt, onions, cucumber, tomato, chili, and coriander.
The document is a test paper for a software testing course. It contains 5 questions assessing different aspects of software testing. Question 1 defines Software Quality Assurance and its objectives. It also lists various activities included in SQA. Question 2 provides a case study on testing an elevator control system and asks to write equivalence partitions, boundary conditions, and a decision table. Question 3 differentiates between black box and white box testing with examples. Question 4 shows a code segment, asks to draw a flow chart and identify test data. It also lists types of dynamic testing and defects caught by static analysis. Question 5 discusses different types of testing based on the target and lists pre-program completion testing activities.
The document discusses a scheduling and stress management app or website. It allows first time users to take a quiz and enter their schedule details, and existing users to add to their schedule or check their stress levels. The app or site also provides doctors' suggestions and recommendations for rescheduling based on stress levels from wearable devices.
The document provides a test case but does not contain any substantive information. It consists solely of the phrase "DOC 1 TEST" and lacks details, context or a clear purpose. In just 3 words, it introduces a document labeled as a test but provides no meaningful content to summarize.
The document provides a test case but does not contain any substantive information. It consists solely of the phrase "DOC 1 TEST" and lacks details, context or a clear purpose. In just 3 words, it introduces a document labeled as a test but provides no meaningful content to summarize.
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Literature Review Basics and Understanding Reference Management.pptxDr Ramhari Poudyal
Three-day training on academic research focuses on analytical tools at United Technical College, supported by the University Grant Commission, Nepal. 24-26 May 2024
6th International Conference on Machine Learning & Applications (CMLA 2024)ClaraZara1
6th International Conference on Machine Learning & Applications (CMLA 2024) will provide an excellent international forum for sharing knowledge and results in theory, methodology and applications of on Machine Learning & Applications.
Hierarchical Digital Twin of a Naval Power SystemKerry Sado
A hierarchical digital twin of a Naval DC power system has been developed and experimentally verified. Similar to other state-of-the-art digital twins, this technology creates a digital replica of the physical system executed in real-time or faster, which can modify hardware controls. However, its advantage stems from distributing computational efforts by utilizing a hierarchical structure composed of lower-level digital twin blocks and a higher-level system digital twin. Each digital twin block is associated with a physical subsystem of the hardware and communicates with a singular system digital twin, which creates a system-level response. By extracting information from each level of the hierarchy, power system controls of the hardware were reconfigured autonomously. This hierarchical digital twin development offers several advantages over other digital twins, particularly in the field of naval power systems. The hierarchical structure allows for greater computational efficiency and scalability while the ability to autonomously reconfigure hardware controls offers increased flexibility and responsiveness. The hierarchical decomposition and models utilized were well aligned with the physical twin, as indicated by the maximum deviations between the developed digital twin hierarchy and the hardware.
PROJECT FORMAT FOR EVS AMITY UNIVERSITY GWALIOR.ppt
Activity
1. Activity:
An activity represents a single screen with a user interface. For example, an email application might
have one activity that shows a list of new emails, another activity to compose an email, and another
activity for reading emails. If an application has more than one activity, then one of them should be
marked as the activity that is presented when the application is launched.
If you have worked with C, C++ or Java programming language then you must have seen that your
program starts from main() function. Very similar way, Android system initiates its program with in
an Activity starting with a call on onCreate() callback method. There is a sequence of callback
methods that start up an activity and a sequence of callback methods that tear down an activity as
shown in the below Activity lifecycle diagram:
The Activity class defines the following callbacks i.e. events. You don't need to implement all the
callbacks methods. However, it's important that you understand each one and implement those
that ensure your app behaves the way users expect.
Callback Description
onCreate() This is the first callback and called when the activity is first created.
onStart() This callback is called when the activity becomes visible to the user.
onResume() This is called when the user starts interacting with the application.
onPause()
The paused activity does not receive user input and cannot execute any
code and called when the current activity is being paused and the previous
activity is being resumed.
onStop() This callback is called when the activity is no longer visible.
onDestroy() This callback is called before the activity is destroyed by the system.
onRestart() This callback is called when the activity restarts after stopping it.
2. Example
This example will take you through simple steps to show Android application activity life cycle.
Follow the following steps to modify the Android application we created in Hello World Example
chapter:
Step Description
1
You will use Eclipse IDE to create an Android application and name it as HelloWorld under a
package com.example.helloworld as explained in the Hello World Example chapter.
2
Modify main activity file MainActivity.java as explained below. Keep rest of the files
unchanged.
3
Run the application to launch Android emulator and verify the result of the changes done in
the aplication.
Following is the content of the modified main activity file
src/com.example.helloworld/MainActivity.java. This fileincludes each of the fundamental lifecycle
methods. The Log.d() method has been used to generate log messages:
package com.example.helloworld;
import android.os.Bundle;
import android.app.Activity;
import android.util.Log;
public class MainActivity extends Activity {
String msg = "Android : ";
/** Called when the activity is first created. */
@Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
Log.d(msg, "The onCreate() event");
}
/** Called when the activity is about to become visible. */
@Override
protected void onStart() {
super.onStart();
Log.d(msg, "The onStart() event");
}
/** Called when the activity has become visible. */
@Override
protected void onResume() {
super.onResume();
3. Log.d(msg, "The onResume() event");
}
/** Called when another activity is taking focus. */
@Override
protected void onPause() {
super.onPause();
Log.d(msg, "The onPause() event");
}
/** Called when the activity is no longer visible. */
@Override
protected void onStop() {
super.onStop();
Log.d(msg, "The onStop() event");
}
/** Called just before the activity is destroyed. */
@Override
public void onDestroy() {
super.onDestroy();
Log.d(msg, "The onDestroy() event");
}
}
An activity class loads all the UI component using the XML file available in res/layout folder of the
project. Following statement loads UI components from res/layout/activity_main.xml file:
setContentView(R.layout.activity_main);
An application can have one or more activities without any restrictions. Every activity you define for
your application must be declared in your AndroidManifest.xml file and the main activity for your
app must be declared in the manifest with an <intent-filter> that includes the MAIN action and
LAUNCHER category as follows:
<manifest xmlns:android="http://schemas.android.com/apk/res/android"
package="com.example.helloworld"
android:versionCode="1"
android:versionName="1.0" >
<uses-sdk
android:minSdkVersion="8"
android:targetSdkVersion="15" />
<application
android:icon="@drawable/ic_launcher"
android:label="@string/app_name"
android:theme="@style/AppTheme" >
<activity
4. android:name=".MainActivity"
android:label="@string/title_activity_main" >
<intent-filter>
<action android:name="android.intent.action.MAIN" />
<category android:name="android.intent.category.LAUNCHER"/>
</intent-filter>
</activity>
</application>
</manifest>
If either the MAIN action or LAUNCHER category are not declared for one of your activities, then
your app icon will not appear in the Home screen's list of apps.
Let's try to run our modified Hello World! application we just modified. I assume you had created
your AVD while doing environment setup. To run the app from Eclipse, open one of your project's
activity files and click Run icon from the toolbar. Eclipse installs the app on your AVD and starts it
and if everything is fine with your setup and application, it will display Emulator window and you
should see following log messages in LogCat window in Eclipse IDE:
07-19 15:00:43.405: D/Android :(866): The onCreate() event
07-19 15:00:43.405: D/Android :(866): The onStart() event
07-19 15:00:43.415: D/Android :(866): The onResume() event
Let us try to click Red button on the Android emulator and it will generate following events
messages in LogCat window in Eclipse IDE:
07-19 15:01:10.995: D/Android :(866): The onPause() event
07-19 15:01:12.705: D/Android :(866): The onStop() event
Let us again try to click Menu button on the Android emulator and it will generate following events
messages in LogCat window in Eclipse IDE:
07-19 15:01:13.995: D/Android :(866): The onStart() event
07-19 15:01:14.705: D/Android :(866): The onResume() event
Next, let us again try to click Back button on the Android emulator and it will generate following
events messages in LogCat window in Eclipse IDE and this completes the Acitivity Life Cycle for an
Android Application.
07-19 15:33:15.687: D/Android :(992): The onPause() event
07-19 15:33:15.525: D/Android :(992): The onStop() event
07-19 15:33:15.525: D/Android :(992): The onDestroy() even
Useful links:
http://developer.android.com/training/basics/activity-lifecycle/index.html
5. Fragment:
A Fragment is a piece of an application's user interface or behavior that can be placed in an Activity
which enable more modular activity design. It will not be wrong if we say, a fragment is a kind of
sub-acitivity. Following are important points about fragment:
A fragment has its own layout and its own behavior with its own lifecycle callbacks.
You can add or remove fragments in an activity while the activity is running.
You can combine multiple fragments in a single activity to build a multi-pane UI.
A fragment can be used in multiple activities.
Fragment life cycle is closely related to the lifecycle of its host activity which means when
the activity is paused, all the fragments available in the acivity will also be stopped.
A fragment can implement a behavior that has no user interface component.
Fragments were added to the Android API in Honeycomb version of Android which API
version 11.
You create fragments by extending Fragment class and You can insert a fragment into your activity
layout by declaring the fragment in the activity's layout file, as a <fragment> element.
Prior to fragment introduction, we had a limitation because we can show only a single activity on the
screen at one given point in time. So we were not able to divide device screen and control different
parts separately. But with the introduction of fragment we got more flexibility and removed the
limitation of having a single activity on the screen at a time. Now we can have a single acitivity but
each acitivity can comprise of multiple fragments which will have their own layout, events and
complete lifecycle.
Following is a typical example of how two UI modules defined by fragments can be combined into
one activity for a tablet design, but separated for a handset design.
The application can embed two fragments in Activity A, when running on a tablet-sized device.
However, on a handset-sized screen, there's not enough room for both fragments, so Activity A
6. includes only the fragment for the list of articles, and when the user selects an article, it starts
Activity B, which includes the second fragment to read the article.
Fragment Life Cycle
Android fragments have their own life cycle very similar to an android activity. This section briefs
different stages of its life cycle.
Phase I: When a fragment gets created, it goes
through the following states:
onAttach()
onCreate()
onCreateView()
onActivityCreated()
Phase II: When the fragment becomes visible, it
goes through these states:
onStart()
onResume()
Phase III: When the fragment goes into the
background mode, it goes through these states:
onPaused()
onStop()
Phase IV: When the fragment is destroyed, it
goes through the following states:
onPaused()
onStop()
onDestroyView()
onDestroy()
onDetach()
How to use Fragments?
This involves number of simple steps to create Fragments.
First of all decide how many fragments you want to use in an activity. For example let's we
want to use two fragments to handle landscape and portrait modes of the device.
7. Next based on number of fragments, create classes which will extend the Fragment class. The
Fragment class has above mentioned callback functions. You can override any of the
functions based on your requirements.
Corresponding to each fragment, you will need to create layout files in XML file. These files
will have layout for the defined fragments.
Finally modify activity file to define the actual logic of replacing fragments based on your
requirement.
Here is the list of important methods which you can to override in your fragment class:
onCreate() The system calls this when creating the fragment. You should initialize essential
components of the fragment that you want to retain when the fragment is paused or stopped,
then resumed.
onCreateView() The system calls this callback when it's time for the fragment to draw its
user interface for the first time. To draw a UI for your fragment, you must return a View
component from this method that is the root of your fragment's layout. You can return null if
the fragment does not provide a UI.
onPause() The system calls this method as the first indication that the user is leaving the
fragment. This is usually where you should commit any changes that should be persisted
beyond the current user session.
Example
This example will explain you how to create your own Fragments. Here we will create two
fragments and one of them will be used when device is in landscape mode and another fragment will
be used in case of portrait mode. So let's follow the following steps to similar to what we followed
while creating Hello World Example:
Step Description
1
You will use Eclipse IDEtocreate an Androidapplicationandname itas MyFragments undera
package com.example.myfragments,withblankActivity.
2
Modifymainactivityfile MainActivity.java asshownbelow inthe code.Here we will checkorientation
of the device andaccordinglywe will switchbetweendifferentfragments.
3
Create a two javafiles PM_Fragment.java andLM_Fragement.java underthe package
com.example.myfragmentstodefine yourfragmentsandassociatedmethods.
4
Create layoutsfiles res/layout/lm_fragment.xmlandres/layout/pm_fragment.xmlanddefine your
layoutsforboththe fragments.
5 Modifythe detaultcontentof res/layout/activity_main.xmlfile toinclude boththe fragments.
6 Define requiredconstantsin res/values/strings.xmlfile
7
Run the applicationtolaunchAndroidemulatorandverifythe resultof the changesdone inthe
aplication.
8. Following is the content of the modified main activity file
src/com.example.mycontentprovider/MainActivity.java:
package com.example.myfragments;
import android.os.Bundle;
import android.app.Activity;
import android.app.FragmentManager;
import android.app.FragmentTransaction;
import android.content.res.Configuration;
import android.view.WindowManager;
public class MainActivity extends Activity {
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
Configuration config = getResources().getConfiguration();
FragmentManager fragmentManager = getFragmentManager();
FragmentTransaction fragmentTransaction =
fragmentManager.beginTransaction();
/**
* Check the device orientation and act accordingly
*/
if (config.orientation == Configuration.ORIENTATION_LANDSCAPE) {
/**
* Landscape mode of the device
*/
LM_Fragment ls_fragment = new LM_Fragment();
fragmentTransaction.replace(android.R.id.content, ls_fragment);
}else{
/**
* Portrait mode of the device
*/
PM_Fragment pm_fragment = new PM_Fragment();
fragmentTransaction.replace(android.R.id.content, pm_fragment);
}
fragmentTransaction.commit();
}
}
Create two fragment files LM_Fragement.java and PM_Fragment.java under
com.example.myfragments package.
Following is the content of LM_Fragement.java file:
package com.example.myfragments;
import android.app.Fragment;
import android.os.Bundle;
import android.view.LayoutInflater;
import android.view.View;
import android.view.ViewGroup;
9. public class LM_Fragment extends Fragment{
@Override
public View onCreateView(LayoutInflater inflater,
ViewGroup container, Bundle savedInstanceState) {
/**
* Inflate the layout for this fragment
*/
return inflater.inflate(
R.layout.lm_fragment, container, false);
}
}
Following is the content of PM_Fragement.java file:
package com.example.myfragments;
import android.app.Fragment;
import android.os.Bundle;
import android.view.LayoutInflater;
import android.view.View;
import android.view.ViewGroup;
public class PM_Fragment extends Fragment{
@Override
public View onCreateView(LayoutInflater inflater,
ViewGroup container, Bundle savedInstanceState) {
/**
* Inflate the layout for this fragment
*/
return inflater.inflate(
R.layout.pm_fragment, container, false);
}
}
Create two layout files lm_fragement.xml and pm_fragment.xml under res/layout directory.
Following is the content of lm_fragement.xml file:
<?xml version="1.0" encoding="utf-8"?>
<LinearLayout
xmlns:android="http://schemas.android.com/apk/res/android"
android:orientation="vertical"
android:layout_width="fill_parent"
android:layout_height="fill_parent"
android:background="#7bae16">
<TextView
android:layout_width="fill_parent"
android:layout_height="wrap_content"
android:text="@string/landscape_message"
android:textColor="#000000"
android:textSize="20px" />
<!-- More GUI components go here -->
</LinearLayout>
Following is the content of pm_fragment.xml file:
11. Let's try to run our modified MyFragments application we just created. To run the app from Eclipse,
open one of your project's activity files and click Run icon from the toolbar. Eclipse installs the app
on your AVD and starts it and if everything is fine with your setup and application, it will display
Emulator window where you will click on Menu button to see the following window. Be patience
because it may take sometime based on your computer speed:
To change the mode of the emulator screen, let's do the following:
fn+control+F11 on Mac to change the landscape to portrait and vice versa.
ctrl+F11 on Windows.
ctrl+F11 on Linux.
This way you can use same activity but different GUIs through different fragments. You can use
different type of GUI components for different GUIs based on your requirements.