在Eclipse中生成一个android项目时，Eclipse会自动生成一个project.properties文件，打开这个文件（下面以我写的一个项目中的这个文件为例），里面的内容如下所示：

# This file is automatically generated by Android Tools.
# Do not modify this file -- YOUR CHANGES WILL BE ERASED!
#
# This file must be checked in Version Control Systems.
#
# To customize properties used by the Ant build system edit
# "ant.properties", and override values to adapt the script to your
# project structure.
#
# To enable ProGuard to shrink and obfuscate your code, uncomment this (available properties: sdk.dir, user.home):
#proguard.config=${sdk.dir}\tools\proguard\proguard-android.txt:proguard-project.txt

# Project target.
target=android-10

若想防止自己的劳动成果不被别人轻易地剽窃，就在这个project.properties文件中最后的地方添加这样一句话：proguard.config=proguard.cfg ，添加后这个文件中的整体内容如下所示：

# This file is automatically generated by Android Tools.
# Do not modify this file -- YOUR CHANGES WILL BE ERASED!
#
# This file must be checked in Version Control Systems.
#
# To customize properties used by the Ant build system edit
# "ant.properties", and override values to adapt the script to your
# project structure.
#
# To enable ProGuard to shrink and obfuscate your code, uncomment this (available properties: sdk.dir, user.home):
#proguard.config=${sdk.dir}\tools\proguard\proguard-android.txt:proguard-project.txt

# Project target.
target=android-10
proguard.config=proguard.cfg

这样处理之后生成的APK文件就能很好地防止反编译了