Android lifecycle
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This document discusses the activity lifecycle in Android applications. It provides an overview of how Android manages application processes and activities, and defines the key lifecycle callback methods that activities can implement to respond to state changes, including onCreate(), onStart(), onResume(), onPause(), onStop(), onRestart(), and onDestroy(). It notes that the Android system controls activity lifecycles and may stop or destroy applications at any time to reclaim resources as needed.
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This document provides an introduction to database management systems (DBMS) and SQL Server. It discusses what a database is and where databases are used. It then describes DBMS as software that allows users to define, create, query, update and administer databases. Common DBMS examples include Oracle, MySQL, PostgreSQL and SQL Server. The document goes on to explain relational databases and the entity-relationship model. It also covers key concepts like tables, rows, columns, primary keys and foreign keys. Finally, it discusses the major SQL statements: DDL for defining database structure, DML for managing data, and DCL for controlling access privileges.
Microsoft holo lens
Microsoft HoloLens is the first holographic computer that does not require wires or connection to another device. It allows users to see holograms overlaid in the real world. HoloLens features see-through holographic lenses, sensors, and a processing unit that allows it to understand the environment and overlay holograms without wires in real-time. HoloLens uses augmented reality technology to supplement real-world environments with virtual elements and can enable entirely new ways of communication, creation and exploration through holograms.
Blue brain
The document outlines the Blue Brain project which aims to create a virtual model of the human brain through simulation. The objectives are to gain insights into human thinking and memory in order to cure diseases like Parkinson's. It discusses how the brain works and how artificial neural networks could be used to simulate it. Requirements for the Blue Brain include nanobots to monitor brain activity and interface it with a computer. Potential applications include developing supercomputers and understanding animal behavior, while risks involve dependency on technology and security issues.
5g
The document provides information on the 5 generations of cellular network technology: 1G through 5G. 1G began in the 1980s and allowed analog voice calls. 2G launched in the late 1980s and added digital voice and SMS. 3G started in the late 1990s and enabled higher speed data up to 2Mbps. 4G launched in 2010 with speeds up to 100Mbps. 5G is the next major phase, expected to have speeds up to 1Gbps, be 10 times more capable than previous generations, and allow for complete wireless communication with almost no limitations.
Aptitude skills baabtra
An aptitude test measures an individual's ability to apply skills and knowledge. It tests logical reasoning and thinking through multiple choice questions that are timed strictly. Different types of aptitude tests include verbal, numerical, abstract, and spatial abilities. To prepare, practice is important as well as focusing on weak areas. When taking the test, arrive on time, understand instructions, answer questions accurately and quickly while watching the time, and avoid spending too much time on any one question.
Gd baabtra
The document provides guidance on improving group discussion and personal interview skills. It discusses what a group discussion entails, how candidates are evaluated in a group discussion, sample discussion topics, and tips for participating effectively. It also covers what to expect in a personal interview, how to prepare, questions that may be asked, and questions candidates can ask the interviewer. The document aims to help candidates understand both formats and perform at their best.
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- 2. Disclaimer: This presentation is prepared by trainees of baabtra as a part of mentoring program. This is not official document of baabtra –Mentoring Partner Baabtra-Mentoring Partner is the mentoring division of baabte System Technologies Pvt . Ltd
- 4. Activity Life Cycle in android SWALIH T swalihk321@gmail.com www.facebook/ swalih321 twitter.com/swalih321 in.linkedin.com/in/swalih321 9539353663
- 5. • The Android system controls the lifecycle of your application. At any time the Android system may stop or destroy your application, e.g. because of an incoming call. • The Android system defines a lifecycle for Activities via predefined methods.
- 6. • Each application runs in its own process. • Each activity of an app is run in the apps process • Processes are started and stopped as needed to run an apps components. • Processes may be killed to reclaim needed resources. • Killed apps may be restored to their last state when requested by the user
- 7. • Most management of the life cycle is done automatically by the system via the activity stack. • The activity class has the following method callbacks to help you manage the app: – – – – – – – onCreate() onStart() onResume() onPause() onStop() onRestart() onDestroy()
- 9. • onCreate() ::This method is called when first time activity is created. • onStart()::This method is called just before your activity becomes visible on the screen. • onResume()::This method is called after onStart() method and if your activity is the foreground activity on the screen.
- 10. • onPause()::This method is called when your activity is just about to call another activity so that the current activity has to be paused and the new activity has to be resumed. Here the previous activity is not stopped but it loss the foreground visibility means it goes as background activity. • onStop()::This method is called when your activity is no longer visible on the screen. • onDestroy()::This method is called when your current activity has the last chance to do any processing before it is destroyed.
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