最近几年来，地理信息系统无论是在理论上还是应用上都处在一个飞速发展的阶段。 GIS被应用于多个领域的建模和决策支持，如城市管理、区划、环境整治等等，地理信息成为信息时代重要的组成部分之一； “数字地球”概念的提出，更进一步推动了作为其技术支撑的GIS的发展。 与此同时，一些学者致力于相关的理论研究，如空间感知、空间数据误差、空间关系的形式化等等。 这恰好说明了地理信息系统作为应用技术和学科的两个方面，并且这两个方面构成了相互促进的发展过程。
First, you can start Android application development on the following operating systems:
Microsoft Windows XP or later.
Mac OS X10.5.8 or higher with Intel chips.
Includes GNU C library 2. 7 or later Linux systems.
Second, all the tools needed to develop Android applications are free and can be downloaded from the Internet. The following is a list of software you need to start developing Android applications.
Java JDK5 or later
Android SDK
Java Runtime Environment (JRE)
Android Studio
(optional) Eclipse IDE used by Java developers
(optional) Android development tools (ADT) Eclipse plug-in
The last two components are optional and will facilitate the development of Java-based applications if you are working on a Windows machine. So let’s take a look at how to set up the desired environment. You can access it from Oracle’s Java website: JDKJava SE下载 Download the latest version of Java. Find the documentation for installing JDK in the downloaded file and follow the given instructions to install and configure the settings. Last set If you are running Windows, install JDK in C:jdk1.6.0_15 and in You can also right-click my computer, select Properties = “Advanced” = “Environment variables”, and then update the PATH value by pressing the “OK” button. On Linux, if SDK is installed in the If you use the integrated development environment Eclipse, it automatically knows where Java has been installed. There are many complex and sophisticated techniques for developing Android applications. At present, the main and similar technologies are the following two: Android Studio Eclipse ID 3.3.1. Install the Java Development Kit (JDK) ¶
PATH And JAVA_HOME Environment variable to refer to the containing javac And java The directory of, usually, java_install_dir/bin And java_install_dir . C:\autoexec.bat Add the following to the file:set PATH=C:\jdk1.6.0_15\bin;%PATH% set JAVA_HOME=C:\jdk1.6.0_15
/usr/local/jdk1.6.0_15 And using C shell, put the following code into the .cshrc Files.setenv PATH /usr/local/jdk1.6.0_15/bin:$PATH setenv JAVA_HOME /usr/local/jdk1.6.0_15
3.3.2. Android IDE ¶