Android learning basics-build an eclipse SDK JDK ADT

(Transfer) Reprinted from: caijian 1. Environment installation preparation knowledge literacy 1. compiling environment developed by JDK 1.5 or JDK 1.6 Java 2 "eclipse 3.4 Java developed ide 3. Android SDK 3.0 Android Compiler (software development kit, that is, software development kit) A collection of development tools used by software engineers to build application software for specific software packages, software frameworks, hardware platforms, operating systems, etc. 4 "Android ADT requires the installation of ADT (Android development tools) plug-in, which is a development tool for Android in eclipse. Android development middleware includes a development tool that requires an ADT update URL. In eclipse, it can be automatically updated at home. 2. Installation StepsThis article starts with JDK installation to provide more detailed guidance for new users. 1. Install JDK 1 download URL: http://www.oracle.com/technetwork/java/javase/downloads/index.htm Download result L 2. Install JDK on drive C by default .. 3. Configure the environment my computer-> right-click Properties-> advanced-> environment variables-> Java_home = c: \ Program Files \ Java \ jdk1.6.0   Classpath =.; C: \ Program Files \ Java \ jdk1.6.0\ Lib \ tools. jar;C: \ Program Files \ Java \ jdk1.6.0\ Lib \ DT. jar; C: \ Program Files \ Java \ jdk1.6.\ Bin;  Path = c: \ Program Files \ Java \ jdk1.6.0\ Bin; Or: Java_home = c: \ Program Files \ Java \ jdk1.6.0 Classpath =.; % java_home % \ Lib \ tools. jar;% Java_home % \ Lib \ DT. jar; % java_home % \ bin;  Path = % java_home % \ bin; 4> check whether the installation is successful Run-> cmd-> JAVA-version Display:Verify installation successful 2. Install eclipse You can directly decompress eclipse to focus on the configuration issues. Open eclipse (the workspace needs to be set when you open it for the first time, and set it according to the actual situation) -- windows -- preference -- Java -- installed jres -- add -- standard VMClick Finish .. Okay. 3. Install ADT 1. Install adt0.9.1 online 1) Open eclipse, help-> install new software...-> select Add after work .... 2) Enter Android plugin (User-Defined name) in the name option, and enterHttp://dl-ssl.google.com/android/eclipse/, OrHttps: // DL- Ssl.google.com/android/eclipse/, Click OK, and then select the name option below. 3). Download and install it by default. 2. Offline Installation 1) Open eclipse, help-> install new software...-> select Add after work .... 2) enter (User-Defined name) in the local option, find the compressed package of adt0.9.1 in archive, click OK, and then select the option in name below. Official Android ADT-0.9.6.zip: Http://dl.google.com/android/ADT-0.9.6.zip Official Android ADT-0.9.7.zip: Http://dl.google.com/android/ADT-0.9.7.zip 3. test whether the installation is successful: 1) after installing the ADT plug-in, close eclipse and restart. 2 ). open File-> New-> project ..., check whether the android project option is available. If the option does not appear, click other... option to see if the general option has Android options . If yes, the installation is successful. If no, the installation fails.   4. Upgrade eclipse and ADT plug-ins: 1) with the gradual upgrade of the Android version, the ADT also needs to be upgraded along with the upgrade of the Android version. Otherwise, the android project compilation and running errors may occur; 2) Open eclipse, help-> check for updates... generally "select all", continue "Next" and "accept license", and "finish" to complete the upgrade;   5. Install the android SDK After step 4 is completed, the android icon and project will appear.A small icon is displayed. Now you need to configure the SDK used by ADT 1. Download Android sdk1.5: Http://developer.android.com/intl/zh-CN/sdk/1.5_r2/index.html Decompress the downloaded package   2. windows -- preference -- android Application --- OK 3. Create a virtual device: AVD AVD is called Android virtual device, which is a virtual device running on Android. It is recognized by the android simulator. To run a created Android program, you must create an AVD. You can configure many running projects on each AVD. I understand that a virtual mobile phone device can be customized on a PC. There are two ways to create AVD. The first is the elcipse development environment, and the second is the creation through the command line. Create an eclipse development environment: Select Android AVD manager under windows in the elcipse menu. In name, enter the AVD name. In target, select the class library (Android 1.1, android1.5, or Google APIs 1.5), create the sdcard and skin, and click Finish. Create a command line: Find the path of tools in the command line, and enter the command: Android create AVD -- Target 2 -- name my_avd Android is the command, followed by the parameter, create AVD is the AVD, Target 2 is the level, and name is the AVD name. Now, the preparation for Android is complete. 6. Compile a small column A new Android projected Configuration   The structure of the created project is as follows: Running result: This is the running result ~ You need to learn more about how to understand the generated demo. Note:When creating a project, note that the API level required for AVD Virtual Machine installation for arget must be consistent with the project min SDK version. Compilation cannot pass. When configuring the Virtual Machine AVD, set built -- In: hvga to automatically adjust the screen size without running the interface outside the screen. Conclusion: A complete Android installation and usage is complete. The road is long. Congratulations, you have already opened the door to Android, the secret of which .. Let's study it together... Please pay attention to O (∩ _ ∩) O ~ Note: This is a preliminary introduction. There are many details that need to be added. I hope you can communicate with each other and give me more advice. If it is helpful to you, please try again .. Come on together ..