android 项目进行混淆时，签名打包生产proguard文件是报错处理方法。

#

# Add project specific ProGuard rules here.

# By default, the flags in this file are appended to flags specified

# in ${sdk.dir}/tools/proguard/proguard-android.txt

# You can edit the include path and order by changing the ProGuard

# include property in project.properties.

#

# For more details, see

#   http://developer.android.com/guide/developing/tools/proguard.html
# Add any project specific keep options here:

# If your project uses WebView with JS, uncomment the following

# and specify the fully qualified class name to the JavaScript interface

# class:

#-keepclassmembers class fqcn.of.javascript.interface.for.webview {

#   public *;

#}

-------加进去下面这4行命令

-dontusemixedcaseclassnames

-dontskipnonpubliclibraryclasses

-verbose

-ignorewarnings