整了一天，感覺坑挺多。
1. 選擇如圖中的選項Android Studio進行簽名打包：
2. 填寫APP對應的信息：(最好用個文本記下來放在項目中同步給Team)
- Key store path: 如果是新APP則創建，如果已經有了選擇就行；
- Key store password: *******
- Key alias（別名）: 自定義
- 如果是新創建的文件需要選擇時間，整個25年足夠用了，公司信息填上就OK
- 下一步后選擇release就開始打包
3. Android Studio的混淆功能需要在Gradle中添加：
apply plugin: 'com.android.application' android { compileSdkVersion 19 buildToolsVersion '23.0.1' defaultConfig { applicationId "com.rayclear.juchang" minSdkVersion 17 targetSdkVersion 23 versionCode 4 versionName "1.03" } buildTypes { release { //代碼混淆開關，一定要注意現在已經使用minifyEnabled代替runProguard了 minifyEnabled true // proguard-rules.pro 是當前使用的混淆文件（Eclipse中的proguard.cfg) proguardFiles getDefaultProguardFile('proguard-android.txt'), 'proguard-rules.pro' } } packagingOptions { exclude 'META-INF/DEPENDENCIES' exclude 'META-INF/LICENSE' exclude 'META-INF/LICENSE.txt' exclude 'META-INF/license.txt' exclude 'META-INF/NOTICE' exclude 'META-INF/NOTICE.txt' exclude 'META-INF/notice.txt' exclude 'META-INF/ASL2.0' } compileOptions { sourceCompatibility JavaVersion.VERSION_1_7 targetCompatibility JavaVersion.VERSION_1_7 } }
4. 打包時遇到的問題：
1.一直處於Gradle Build Running... 被坑了兩次，一直以為是真的在打包，IDE也木有個具體提示什么的，就干等了好久。 遇到這種情況，直接關掉Android Studio重新開始吧。正常來說一個普通的APP打包混淆時長也就是1～3分鍾吧。 2.關於cache.properties.lock的錯： Error:Timeout waiting to lock cp_proj class cache for build file '/Users/raomengyang/work/app/build.gradle' (/Users/raomengyang/.gradle/caches/2.8/scripts/build_aldsk0ke4ednnd4pf0nybqlhq/cp_proj). It is currently in use by another Gradle instance. Owner PID: unknown Our PID: 20080 Owner Operation: unknown Our operation: Initialize cache Lock file: /Users/raomengyang/.gradle/caches/2.8/scripts/build_aldsk0ke4ednnd4pf0nybqlhq/cp_proj/cache.properties.lock 之前遇到過同樣的情況，是將帶lock的文件給恢復權限解決的，可是這次不管用，於是退出AS重新來，每次遇到這個問題然后退出AS都會提示后台還有任務沒有結束，所以這個錯誤個人感覺是AS還有后台任務沒有被結束，以至於一直hold在這兒。 3.各種specified twice： java.io.IOException: The same input jar [/Users/raomengyang/work/app/libs/**] is specified twice. 刪掉proguard文件中的重復聲明引用的jar文件。 4.滿天的Warning： Note: there were 157 duplicate class definitions. (http://proguard.sourceforge.net/manual/troubleshooting.html#duplicateclass) Warning:library class org.apache.http.auth.AuthenticationException extends or implements program class org.apache.http.ProtocolException Warning:library class org.apache.http.auth.MalformedChallengeException extends or implements program class org.apache.http.ProtocolException Warning:library class org.apache.http.auth.params.AuthParamBean extends or implements program class org.apache.http.params.HttpAbstractParamBean Warning:library class org.apache.http.client.NonRepeatableRequestException extends or implements program class org.apache.http.ProtocolException Warning:library class org.apache.http.client.RedirectException extends or implements program class org.apache.http.ProtocolException Warning:library class org.apache.http.client.entity.UrlEncodedFormEntity extends or implements program class org.apache.http.entity.StringEntity Warning:library class org.apache.http.client.methods.HttpEntityEnclosingRequestBase extends or implements program class org.apache.http.HttpEntityEnclosingRequest Warning:library class org.apache.http.client.methods.HttpRequestBase extends or implements program class org.apache.http.message.AbstractHttpMessage Warning:library class org.apache.http.client.methods.HttpUriRequest extends or implements program class org.apache.http.HttpRequest Warning:library class org.apache.http.client.params.AllClientPNames extends or implements program class org.apache.http.params.CoreConnectionPNames ………………………………………………………………………………………………Warning…………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………… ………………………………………………………………………………………………Warning…………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………… ………………………………………………………………………………………………Warning…………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………… ………………………………………………………………………………………………Warning…………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………… ………………………………………………………………………………………………Warning…………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………… ………………………………………………………………………………………………Warning…………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………… ………………………………………………………………………………………………Warning…………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………… Warning:library class org.apache.http.client.params.AllClientPNames extends or implements program class org.apache.http.params.CoreProtocolPNames Warning:library class org.apache.http.client.params.ClientParamBean extends or implements program class org.apache.http.params.HttpAbstractParamBean Warning:library class org.apache.http.client.protocol.RequestAddCookies extends or implements program class org.apache.http.HttpRequestInterceptor Warning:library class org.apache.http.client.protocol.RequestDefaultHeaders extends or implements program class org.apache.http.HttpRequestInterceptor Warning:library class org.apache.http.client.protocol.RequestProxyAuthentication extends or implements program class org.apache.http.HttpRequestInterceptor 該類問題都可以根據我們的class文件來進行以下聲明： 例如：現在提示的是org.apache.http.* 這個包里的類有問題，那么就加入下述代碼： -keep class org.apache.http.** { *; } -dontwarn org.apache.http.** 依此類推，注意一點，混淆完后，就算打包成功也需要再次測試，因為APP內部可能會出現上述問題。
5.包含JNI時，可能會將JNI的方法給混淆掉，詳細情況參照：http://blog.csdn.net/qinlicang/article/details/6115804
5.關於proguard.pro文件里面的詳細介紹：
#Author：未知，別的網友總結的，這里拿來給各位參考吧： #在proguard-rules.pro中加入以下代碼，基本可以涵蓋所有 -optimizationpasses 5 # 指定代碼的壓縮級別 -dontusemixedcaseclassnames # 是否使用大小寫混合 -dontpreverify # 混淆時是否做預校驗 -verbose # 混淆時是否記錄日志 -optimizations !code/simplification/arithmetic,!field/*,!class/merging/* # 混淆時所采用的算法 -keep public class * extends android.app.Activity # 保持哪些類不被混淆 -keep public class * extends android.app.Application # 保持哪些類不被混淆 -keep public class * extends android.app.Service # 保持哪些類不被混淆 -keep public class * extends android.content.BroadcastReceiver # 保持哪些類不被混淆 -keep public class * extends android.content.ContentProvider # 保持哪些類不被混淆 -keep public class * extends android.app.backup.BackupAgentHelper # 保持哪些類不被混淆 -keep public class * extends android.preference.Preference # 保持哪些類不被混淆 -keep public class com.android.vending.licensing.ILicensingService # 保持哪些類不被混淆 -keepclasseswithmembernames class * { # 保持 native 方法不被混淆 native <methods>; } -keepclasseswithmembers class * { # 保持自定義控件類不被混淆 public <init>(android.content.Context, android.util.AttributeSet); } -keepclasseswithmembers class * {# 保持自定義控件類不被混淆 public <init>(android.content.Context, android.util.AttributeSet, int); } -keepclassmembers class * extends android.app.Activity { # 保持自定義控件類不被混淆 public void *(android.view.View); } -keepclassmembers enum * { # 保持枚舉 enum 類不被混淆 public static **[] values(); public static ** valueOf(java.lang.String); } -keep class * implements android.os.Parcelable { # 保持 Parcelable 不被混淆 public static final android.os.Parcelable$Creator *; }