android programming basics

Application BasicsAndroid applications are written in the Java programming language.The android SDK tool compiles Android code, data, and resource files into an android package. This is a collection file with the name ending with .apk. The code in the same APK file is considered an application.After an

--5.2.3 fragment instance explaining--implementation of the bottom navigation bar (Method 3)Android Basics Getting Started tutorial--5.2.4 fragment instance explaining--bottom navigation bar +viewpager sliding Toggle PageAndroid Basics Getting Started tutorial--5.2.5 fragment instance explaining--simple implementation of the News (shopping) class app list fragmen

Concurrent Programming (1) ---- Concurrent Programming basics, ---- programming Basics Multithreading is a basic knowledge that programmers must master. However, due to the encapsulation of various frameworks, we seldom access multithreading. Once a problem occurs in the pro

Python programming basics-hardware basics of computer principles and python programming Basics I. registers: registers are some small storage areas used inside the CPU to store data, and are used to temporarily store data and calculation results involved in calculation. 1. r

Programming basics 2. java programming Basics [URGENT] C ++ programming basics 2 1.The first is 5000, 714x5 is, and the entire division isThe second is 0, because the operation is 5/7, the result is 0, and then 0*1000 is 0.2.(

[. Net Object-Oriented Programming Basics] (19) Basics of LINQ and Object-Oriented Programming [. Net Object-Oriented Programming Basics] (19) Basics of LINQ In the last two sections, w

WinSock network programming BASICS (1) and winsock network programming Basics Record the problems encountered during windows Network Programming and related notes Basic concepts: Socket: Socket originated from UNIX. Socket is an intermediate software abstraction layer for co

PLSQL programming basics, control statements, exception details, plsql programming Basics Basic PL/SQL programmingI,PL/SQL Overview1.PL/SQL Introduction PL/SQL (Procedural Language) is a programming Language that combines with Structured Query Language (SQL). It is an extens

parameter to the event listener. The event listener judges the event object and executes the corresponding event handler (the corresponding event processing method). The development steps for the listener-based event processing model in Android are as follows. Gets the normal interface component (event source), which is the object being monitored. Implements the event listener class, which is a special Java class that must imple

Java programming basics-Fibonacci series and programming Basics Problem description: A frog can jump to level 1 or Level 2 at a time. Find the total number of hops that the frog jumps to an n-level step. Thought: possible situations: (1) n = 1, one method; (2) n = 2, two methods; (3) for level n, only jump from level

Java basics-GUI programming (2), java basics gui Programming I. event listening Mechanism -- Event Source: the graphical components in the awt or swing package, that is, the components in which the event occurs. -- Event: An operation performed by the Event user on the component. -- Listener: Listener is responsible fo

[Programming Basics] three handshakes and four waves in the TCP protocol (illustration), programming basics tcp TCP establishment requires three handshakes to be established, and disconnection requires four handshakes. The entire process is shown in: Let's take a look at how to establish a connection. First, the Clie

Java basics-network programming, java basics Network Programming I. IP and InetAddress Java supports the development of network communication programs. It mainly provides two communication protocols: TCP and UDP. Reliable connection and transmission, and third-party handshake Unreliable connection transmission, whic

Java programming basics-parameter transfer for method calls, java programming Basics There are two arguments for passing parameters when calling a function in Java code: Passing values and passing references. If the basic type of Java (int, boolean, etc.) is used as a parameter, it is considered to be a value, and if i

Java (Socket programming basics), socket programming BasicsI,Two main problems in Network Programming One is how to accurately locate one or more hosts on the network, and the other is how to transmit data reliably and efficiently after finding the hosts. In TCP/IP, the IP layer is mainly responsible for locating netwo

接的套接口 constchar FAR*buf,//字符缓冲区，内有将要发送的数据 int len,//即将发送的缓冲区的字符数 int flags//控制传输方式，可以是0)②RECV () function to receive data from a socket interfaceint recv( SOCKET s,//已建立的套接口 char FAR* buf,//用于接收数据的缓冲区 int len,//缓冲区的长度 int flags//调用方式 ，正常为0)Data transfer functions used by UDP①recvfrom () Receive dataint recvfrom( SOCKET s,//一个套接口 char FAR* buf,//接收数据的缓冲区 int len,//缓冲区长度 int flags,//调用操作方式 structfrom//源地址，向谁要信息 int FAR* fromlen//)②sendto () Send dataint sendt

[WCF programming] 3. WCF basics, wcf programming 3. wcf BasicsI. Service A service is a set of public functions. The service contains concepts such as language, technology, version, and framework. Only the specified communication mode is allowed for interactions between services. External clients do not know the implementation details of the service. Therefore, t

Java basics-GUI programming (1), java basics gui Programming I. Definition The full name of GUI is Graphical User Interface, that is, Graphical User Interface. JDK provides two packages, AWT and Swing, for GUI program design and development. 1. java. awt abstract Window Toolkit (abstract Window Toolkit), which is an ea

Android basics 1: Android BasicsMobile development basics 1. Basics Mobile development: it refers to the development based on portable terminals such as PDA and UMPC. PDA: Person Digital Assistant Personal Digital Assistant UMPC: Ultra-mobile Personal Computer super mobil

Android BASICS (16) and Android BasicsPull out a little thing Pull out a little thing Introduction Body Additional reading Target Audience: Android beginners without basic knowledge Knowledge Point: Use the support V4 package in Android Studio to implemen