Android: starts from scratch and starts from scratch

Android: starts from scratch and starts from scratch
I. JDK (no installation required)
1. Download the appropriate jdk
2. Configure the environment variable to add a system edge = Variable
JAVA_HOME = D: \ Java \ jdk1.8.0 _ 91
CLASSPATH =.; % JAVA_HOME % \ lib \ dt. jar; % JAVA_HOME % \ lib \ tools. jar; % JAVA_HOME % \ jre \ lib \ rt. jar
PATH = D: \ Java \ jdk1.8.0 _ 91 \ bin)
3. Verification
Run java-version in any directory


2. Run eclipse ADT (no installation required)
1. Configure an environment variable ANDROID_HOME = D: \ Java \ adt-bundle-windows-x86_64-20140702 \ sdk
2.run eclipse.exe directly. 3. Download the simulator (the haima simulator is used), open the simulator, debug it, open eclipse, switch to the editing view, and select DDMS

If the connection is successful, check

4. Create a project (helloWorld)

1. Select file> new> Android application project to create an android project, and then specify the relevant project information and configuration (for example)

　　　　　　

2. Click next until, as shown in figure

　　　　　　

After the project is finished.

5. Android project directory structure

Src: source code

Gen: R file (pointer to a java resource file)

Bin: apk File

Assets: asset directory

Libs: Additional jar packages

Drawable: stores Android image resources.

Layout: stores the Android layout,

Values: String

Android configuration file: the four components (Activity broadCastReceiver service ContentProvider) in Android must be configured in the configuration file.