Android Java-based systems development projects, teaching the use of reference is good!

Chap01_HelloWorld
.................\.classpath
.................\.project
.................\.settings
.................\.........\org.eclipse.jdt.core.prefs
.................\AndroidManifest.xml
.................\assets
.................\bin
.................\...\Chap01_HelloWorld.apk
.................\...\classes.dex
.................\...\com
.................\...\...\android
.................\...\...\.......\etc
.................\...\...\.......\...\hello
.................\...\...\.......\...\.....\Chap01_HelloWorldActivity.class
.................\...\...\.......\...\.....\R$attr.class
.................\...\...\.......\...\.....\R$drawable.class
.................\...\...\.......\...\.....\R$layout.class
.................\...\...\.......\...\.....\R$string.class
.................\...\...\.......\...\.....\R.class
.................\...\...\.......\...\.....\SecondActivity.class
.................\...\resources.ap_
.................\default.properties
.................\gen
.................\...\com
.................\...\...\android
.................\...\...\.......\etc
.................\...\...\.......\...\hello
.................\...\...\.......\...\.....\R.java
.................\proguard.cfg
.................\res
.................\...\drawable-hdpi
.................\...\.............\abc.jpg
.................\...\.............\icon.png
.................\...\drawable-ldpi
.................\...\.............\abc.jpg
.................\...\.............\icon.png
.................\...\drawable-mdpi
.................\...\.............\abc.jpg
.................\...\.............\icon.png
.................\...\layout
.................\...\......\main.xml
.................\...\......\second.xml
.................\...\values
.................\...\......\strings.xml
.................\src
.................\...\com
.................\...\...\android
.................\...\...\.......\etc
.................\...\...\.......\...\hello
.................\...\...\.......\...\.....\Chap01_HelloWorldActivity.java
.................\...\...\.......\...\.....\SecondActivity.java

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