反編譯servicejar
⑴ 如何在Mac上面進行AndroidApk反編譯
最新的反編譯不用此方法， 有最新的一鍵自動反編譯工具：
這段時間在學Android應用開發，在想既然是用java開發的應該很好反編譯從而得到源代碼吧，google了一下，確實很簡單，以下是我的實踐過程。
在此鄭重聲明，貼出來的目的不是為了去破解人家的軟體，完全是一種學習的態度，不過好像通過這種方式也可以去漢化一些外國軟體。
註：本Android反編譯教程，在Windows7-Ultimate-64bit操作系統上，測試通過！
下述所需的反編譯工具包 下載
一、反編譯Apk得到Java源代碼
首先要下載兩個工具：dex2jar和JD-GUI
前者dex2jar是將apk中的classes.dex轉化成Jar文件，而JD-GUI是一個反編譯工具，可以直接查看Jar包的源代碼。以下是下載地址：
dex2jar：
JD-GUI：
具體步驟：
首先將apk文件，將後綴改為zip，解壓，得到其中的classes.dex，它就是java文件編譯再通過dx工具打包而成的；
解壓下載的dex2jar，將classes.dex復制到dex2jar.bat所在目錄。在命令行下定位到dex2jar.bat所在目錄(在DOS命令下CD 目錄)
運行
dex2jar.bat classes.dex
生成
classes.dex.dex2jar.jar
生成jar文件的截圖如下：
運行JD-GUI（jd-gui.exe），打開上面生成的jar包，即可看到源代碼了
HelloAndroid源碼（編譯前的apk源碼對照）如下：
二、反編譯apk生成程序的源代碼和圖片、XML配置、語言資源等文件
如果是漢化軟體，這將特別有用。首先還是下載工具，這次用到的是apktool
下載地址：
下載：apktool1.4.1.tar.bz2 和 apktool-install-windows-r04-brut1.tar.bz2（兩個包都下載）
具體步驟：
將下載的兩個包解壓到同一個文件夾下，應該會有三個文件：aapt.exe，apktool.bat，apktool.jar
在命令行下定位到apktool.bat文件夾，輸入以下命令：apktool d C:\*.apk C:\*文件夾，如下圖：
命令行解釋：apktool d [apk文件 ] [輸出文件夾]
反編譯的文件如下（AndroidManifest.xml為例）：
特別注意：你要反編譯的文件一定要放在C盤的根目錄里（其實不用放在C盤根目錄也行）
例如：在D盤目錄D:\apktool1.4.1
cd /d D:\apktool1.4.1 //切換到D盤目錄，包含HelloAndroid.apk以及aapt.exe，apktool.bat，apktool.jar三個文件
apktool.bat d -f HelloAndroid.apk HelloAndroid // apktool反編譯命令，注意 d和
-f 的寫法
將反編譯完的文件重新打包成apk，很簡單，輸入apktool b c:\***文件夾（你編譯出來文件夾）即可，命令如下：這個主意你文件所在盤
打包apk後的文件在目錄C:\HelloAndroid下，生成了兩個文件夾：
build
dist
其中，打包生成的HelloAndroid.apk，在上面的dist文件夾下，Ok
最後，再介紹一款剛出來的反編譯工具 Androidfby ，它是一款對上述步驟進行了封裝的圖形界面工具，下載地址
但是，針對部分簽名的apk，無法實現反編譯，但本博客方法則仍然可以反編譯成功！僅供參考使用
另外，作為應用開發者，肯定不希望自己的代碼被反編譯的，下一遍博客將講述如何通過混淆代碼防止被別人反編譯
Android如何防止apk程序被反編譯
作為Android應用開發者，不得不面對一個尷尬的局面，就是自己辛辛苦苦開發的應用可以被別人很輕易的就反編譯出來。
Google似乎也發現了這個問題，從SDK2.3開始我們可以看到在android-sdk-windows\tools\下面多了一個proguard文件夾
proguard是一個java代碼混淆的工具，通過proguard，別人即使反編譯你的apk包，也只會看到一些讓人很難看懂的代碼，從而達到保護代碼的作用。
下面具體說一說怎麼樣讓SDK2.3下的proguard.cfg文件起作用，先來看看android-sdk-windows\tools\lib\proguard.cfg的內容：
[html] view
plainprint?
1. -optimizationpasses 5
2. -dontusemixedcaseclassnames
3. -
4. -dontpreverify
5. -verbose
6. -optimizations !code/simplification/arithmetic,!field/*,!class/merging/*
7.
8. -keep public class * extends android.app.Activity
9. -keep public class * extends android.app.Application
10. -keep public class * extends android.app.Service
11. -keep public class * extends android.content.BroadcastReceiver
12. -keep public class * extends android.content.ContentProvider
13. -keep public class * extends android.app.backup.BackupAgentHelper
14. -keep public class * extends android.preference.Preference
15. -keep public class com.android.vending.licensing.ILicensingService
16.
17. -keepclasseswithmembernames class * {
18. native ;
19. }
20.
21. -keepclasseswithmembernames class * {
22. public (android.content.Context, android.util.AttributeSet);
23. }
24.
25. -keepclasseswithmembernames class * {
26. public (android.content.Context, android.util.AttributeSet, int);
27. }
28.
29. -keepclassmembers enum * {
30. public static **[] values();
31. public static ** valueOf(java.lang.String);
32. }
33.
34. -keep class * implements android.os.Parcelable {
35. public static final android.os.Parcelable$Creator *;
36. }
從腳本中可以看到，混淆中保留了繼承自Activity、Service、
Application、BroadcastReceiver、ContentProvider等基本組件以及
com.android.vending.licensing.ILicensingService，
並保留了所有的Native變數名及類名，所有類中部分以設定了固定參數格式的構造函數，枚舉等等。(詳細信息請參考/examples中的例子及注釋。)
讓proguard.cfg起作用的做法很簡單，就是在eclipse自動生成的default.properties文件中加上一句「proguard.config=proguard.cfg」就可以了
完整的default.properties文件應該如下：
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plainprint?
1. # This file is automatically generated by Android Tools.
2. # Do not modify this file -- YOUR CHANGES WILL BE ERASED!
3. #
4. # This file must be checked in Version Control Systems.
5. #
6. # To customize properties used by the Ant build system use,
7. # "build.properties", and override values to adapt the script to your
8. # project structure.
9.
10. # Project target.
11. target=android-9
12. proguard.config=proguard.cfg
大功告成，正常的編譯簽名後就可以防止代碼被反編譯了。反編譯經過代碼混淆的apk得到的代碼應該類似於下面的效果，是很難看懂的：
如果您使用的是2.3之前的SDK版本也沒關系，把上面的proguard.cfg文件復制一份放到項目中，然後進行相同的操作即可
/
⑵ flutter 反編譯
>You are building a fat APK that includes binaries for android-arm, android-arm64.
>If you are deploying the app to the Play Store, it's recommended to use app bundles or split the APK to rece the APK size.
> To generate an app bundle, run:
> flutter build appbundle --target-platform android-arm,android-arm64
> Learn more on: https://developer.android.com/guide/app-bundle
> To split the APKs per ABI, run:
> flutter build apk --target-platform android-arm,android-arm64 --split-per-abi
> Learn more on: https://developer.android.com/studio/build/configure-apk-splits#configure-abi-split
>Initializing gradle... 2.3s
>Resolving dependencies... 14.2s
>Running Gradle task 'assembleRelease'... ע: E:\work_tool\flutter\.pub-cache\hosted\pub.flutter-io.cn\connectivity-0.4.4\android\src\main\java\io\flutter\plugins\connectivity\ConnectivityPlugin.javaʹ�û����ѹ�ʱ�� API��
>ע: �й���ϸ��Ϣ, ��ʹ�� -Xlint:deprecation ���±��롣
>ע: E:\work_tool\flutter\.pub-cache\hosted\pub.flutter-io.cn\url_launcher-5.1.3\android\src\main\java\io\flutter\plugins\urllauncher\WebViewActivity.javaʹ
>�û����ѹ�ʱ�� API��
>ע: �й���ϸ��Ϣ, ��ʹ�� -Xlint:deprecation ���±��롣
>Calling mockable JAR artifact transform to create file: C:\Users\Administrator\.gradle\caches\transforms-1\files-1.1\android.jar\\android.jar with input E:\work_tool\sdk\android-sdk-windows\platforms\android-28\android.jar
>Calling mockable JAR artifact transform to create file: C:\Users\Administrator\.gradle\caches\transforms-1\files-1.1\android.jar\\android.jar with input E:\work_tool\sdk\android-sdk-windows\platforms\android-27\android.jar
>Request to incrementing alive workforce from 0. Current workforce (dead or alive) 0
>thread-pool size=4
>ProGuard, version 6.0.3
>Reading input...
>Reading program jar [C:\Users\Administrator\.gradle\caches\transforms-1\files-1.1\flutter.jar\\jetified-flutter.jar] (filtered)
>Reading program jar [F:\dartSpace\flutter\jiddspace\nfc\build\app\intermediates\flutter\release\libs.jar] (filtered)
>Reading program jar [C:\Users\Administrator\.gradle\caches\transforms-1\files-1.1\localbroadcastmanager-1.0.0.aar\\jars\classes.jar] (filtered)
>Reading program jar [C:\Users\Administrator\.gradle\caches\transforms-1\files-1.1\work-runtime-2.1.0.aar\\jars\classes.jar] (filtered)
>Reading program jar [C:\Users\Administrator\.gradle\caches\transforms-1\files-1.1\fragment-1.1.0.aar\\jars\classes.jar] (filtered)
>Reading program jar [C:\Users\Administrator\.gradle\caches\transforms-1\files-1.1\room-runtime-2.1.0.aar\\jars\classes.jar] (filtered)
>Reading program jar [C:\Users\Administrator\.gradle\caches\transforms-1\files-1.1\room-runtime-2.1.0.aar\\jars\libs\room-common-java8-2.1.0.jar] (filtered)
>Reading program jar [C:\Users\Administrator\.gradle\caches\transforms-1\files-1.1\viewpager-1.0.0.aar\\jars\classes.jar] (filtered)
>Reading program jar [C:\Users\Administrator\.gradle\caches\transforms-1\files-1.1\loader-1.0.0.aar\\jars\classes.jar] (filtered)
>Reading program jar [C:\Users\Administrator\.gradle\caches\transforms-1\files-1.1\activity-1.0.0.aar\\jars\classes.jar] (filtered)
>Reading program jar [C:\Users\Administrator\.gradle\caches\transforms-1\files-1.1\customview-1.0.0.aar\\jars\classes.jar] (filtered)
>Reading program jar [C:\Users\Administrator\.gradle\caches\transforms-1\files-1.1\core-1.1.0.aar\\jars\classes.jar] (filtered)
>Reading program jar [C:\Users\Administrator\.gradle\caches\transforms-1\files-1.1\versionedparcelable-1.1.0.aar\\jars\classes.jar] (filtered)
>Reading program jar [C:\Users\Administrator\.gradle\caches\moles-2\files-2.1\androidx.collection\collection\1.1.0\\collection-1.1.0.jar] (filtered)
>Reading program jar [C:\Users\Administrator\.gradle\caches\transforms-1\files-1.1\lifecycle-livedata-2.0.0.aar\\jars\classes.jar] (filtered)
>Reading program jar [C:\Users\Administrator\.gradle\caches\transforms-1\files-1.1\lifecycle-livedata-core-2.0.0.aar\\jars\classes.jar] (filtered)
>Reading program jar [C:\Users\Administrator\.gradle\caches\transforms-1\files-1.1\core-runtime-2.0.1.aar\\jars\classes.jar] (filtered)
>Reading program jar [C:\Users\Administrator\.gradle\caches\moles-2\files-2.1\androidx.room\room-common\2.1.0\\room-common-2.1.0.jar] (filtered)
>Reading program jar [C:\Users\Administrator\.gradle\caches\transforms-1\files-1.1\sqlite-framework-2.0.1.aar\\jars\classes.jar] (filtered)
>Reading program jar [C:\Users\Administrator\.gradle\caches\transforms-1\files-1.1\sqlite-2.0.1.aar\\jars\classes.jar] (filtered)
>Reading program jar [C:\Users\Administrator\.gradle\caches\transforms-1\files-1.1\lifecycle-service-2.0.0.aar\\jars\classes.jar] (filtered)
>Reading program jar [C:\Users\Administrator\.gradle\caches\transforms-1\files-1.1\lifecycle-runtime-2.1.0.aar\\jars\classes.jar] (filtered)
>Reading program jar [C:\Users\Administrator\.gradle\caches\transforms-1\files-1.1\lifecycle-viewmodel-2.1.0.aar\\jars\classes.jar] (filtered)
>Reading program jar [C:\Users\Administrator\.gradle\caches\transforms-1\files-1.1\savedstate-1.0.0.aar\\jars\classes.jar] (filtered)
>Reading program jar [C:\Users\Administrator\.gradle\caches\moles-2\files-2.1\androidx.lifecycle\lifecycle-common\2.1.0\\lifecycle-common-2.1.0.jar] (filtered)
>Reading program jar [C:\Users\Administrator\.gradle\caches\moles-2\files-2.1\androidx.arch.core\core-common\2.1.0\\core-common-2.1.0.jar] (filtered)
>Reading program jar [C:\Users\Administrator\.gradle\caches\moles-2\files-2.1\androidx.annotation\annotation\1.1.0\\annotation-1.1.0.jar] (filtered)
>Reading program jar [C:\Users\Administrator\.gradle\caches\moles-2\files-2.1\com.google.guava\listenablefuture\1.0\\listenablefuture-1.0.jar] (filtered)
>Reading program jar [F:\dartSpace\flutter\jiddspace\nfc\build\flutter_downloader\intermediates\intermediate-jars\release\classes.jar] (filtered)
>Reading program jar [F:\dartSpace\flutter\jiddspace\nfc\build\shared_preferences\intermediates\intermediate-jars\release\classes.jar] (filtered)
>Reading program jar [F:\dartSpace\flutter\jiddspace\nfc\build\url_launcher\intermediates\intermediate-jars\release\classes.jar] (filtered)
>Reading program jar [F:\dartSpace\flutter\jiddspace\nfc\build\sqflite\intermediates\intermediate-jars\release\classes.jar] (filtered)
>Reading program jar [F:\dartSpace\flutter\jiddspace\nfc\build\connectivity\intermediates\intermediate-jars\release\classes.jar] (filtered)
>Reading program jar [F:\dartSpace\flutter\jiddspace\nfc\build\path_provider\intermediates\intermediate-jars\release\classes.jar] (filtered)
>Reading program jar [F:\dartSpace\flutter\jiddspace\nfc\build\package_info\intermediates\intermediate-jars\release\classes.jar] (filtered)
>Reading program directory [F:\dartSpace\flutter\jiddspace\nfc\build\app\intermediates\javac\release\compileReleaseJavaWithJavac\classes] (filtered)
>Reading program jar [F:\dartSpace\flutter\jiddspace\nfc\build\app\intermediates\transforms\mergeJavaRes\release\0.jar] (filtered)
>Reading library jar [C:\Users\Administrator\.gradle\caches\moles-2\files-2.1\androidx.annotation\annotation\1.0.0\\annotation-1.0.0.jar] (filtered)
>Reading library jar [E:\work_tool\sdk\android-sdk-windows\platforms\android-28\android.jar]
>Reading library jar [E:\work_tool\sdk\android-sdk-windows\build-tools\28.0.3\core-lambda-stubs.jar]
>Reading library jar [E:\work_tool\sdk\android-sdk-windows\platforms\android-28\optional\org.apache.http.legacy.jar]
>Reading library jar [E:\work_tool\sdk\android-sdk-windows\platforms\android-28\optional\android.test.mock.jar]
>Reading library jar [E:\work_tool\sdk\android-sdk-windows\platforms\android-28\optional\android.test.base.jar]
>Reading library jar [E:\work_tool\sdk\android-sdk-windows\platforms\android-28\optional\android.test.runner.jar]
>Initializing...
>Warning: io.flutter.embedding.android.FlutterView: can't find referenced method 'android.graphics.Insets getSystemGestureInsets()' in library class android.view.WindowInsets
>Warning: io.flutter.embedding.android.FlutterView: can't find referenced class android.graphics.Insets
>Warning: io.flutter.embedding.android.FlutterView: can't find referenced class android.graphics.Insets
>Warning: io.flutter.embedding.android.FlutterView: can't find referenced class android.graphics.Insets
>Warning: io.flutter.embedding.android.FlutterView: can't find referenced class android.graphics.Insets
>Warning: io.flutter.embedding.android.FlutterView: can't find referenced class android.graphics.Insets
>Warning: io.flutter.embedding.android.FlutterView: can't find referenced class android.graphics.Insets
>Warning: io.flutter.view.FlutterView: can't find referenced method 'android.graphics.Insets getSystemGestureInsets()' in library class android.view.WindowInsets
>Warning: io.flutter.view.FlutterView: can't find referenced class android.graphics.Insets
>Warning: io.flutter.view.FlutterView: can't find referenced class android.graphics.Insets
>Note: io.flutter.view.AccessibilityViewEmbedder$ReflectionAccessors: can't find dynamically referenced class android.util.LongArray
>Warning: io.flutter.view.FlutterView: can't find referenced class android.graphics.Insets
>Warning: io.flutter.view.FlutterView: can't find referenced class android.graphics.Insets
>Warning: io.flutter.view.FlutterView: can't find referenced class android.graphics.Insets
>Warning: io.flutter.view.FlutterView: can't find referenced class android.graphics.Insets
>Note: there were 1 unresolved dynamic references to classes or interfaces.
> You should check if you need to specify additional program jars.
> (http://proguard.sourceforge.net/manual/troubleshooting.html#dynamicalclass)
>Warning: Exception while processing task java.io.IOException: Please correct the above warnings first.
>Thread(Tasks limiter_1): destruction
>Warning: there were 12 unresolved references to classes or interfaces.
> You may need to add missing library jars or update their versions.
> If your code works fine without the missing classes, you can suppress
> the warnings with '-dontwarn' options.
> (http://proguard.sourceforge.net/manual/troubleshooting.html#unresolvedclass)
>Warning: there were 2 unresolved references to library class members.
> You probably need to update the library versions.
> (http://proguard.sourceforge.net/manual/troubleshooting.html#unresolvedlibraryclassmember)
>
>FAILURE: Build failed with an exception.
>
>* What went wrong:
>Execution failed for task ':app:'.
>> Job failed, see logs for details
>
>* Try:
>Run with --stacktrace option to get the stack trace. Run with --info or --debug option to get more log output. Run with --scan to get full insights.
>
>* Get more help at https://help.gradle.org
>
>BUILD FAILED in 4m 23s
>Running Gradle task 'assembleRelease'...
>Running Gradle task 'assembleRelease'... Done 264.4s (!)
>*******************************************************************************************
>The Gradle failure may have been because of AndroidX incompatibilities in this Flutter app.
>See https://goo.gl/CP92wY for more information on the problem and how to fix it.
>*******************************************************************************************
>Gradle task assembleRelease failed with exit code 1
⑶ 如何實現APK的反編譯得到APK的源碼
最新的反編譯不用此方法， 有最新的一鍵自動反編譯工具：
這段時間在學Android應用開發，在想既然是用Java開發的應該很好反編譯從而得到源代碼吧，google了一下，確實很簡單，以下是我的實踐過程。
在此鄭重聲明，貼出來的目的不是為了去破解人家的軟體，完全是一種學習的態度，不過好像通過這種方式也可以去漢化一些外國軟體。
註：本Android反編譯教程，在Windows7-Ultimate-64bit操作系統上，測試通過！
下述所需的反編譯工具包 下載
一、反編譯Apk得到Java源代碼
首先要下載兩個工具：dex2jar和JD-GUI
前者dex2jar是將apk中的classes.dex轉化成Jar文件，而JD-GUI是一個反編譯工具，可以直接查看Jar包的源代碼。以下是下載地址：
dex2jar：http://laichao.googlecode.com/files/dex2jar-0.0.7-SNAPSHOT.zip
JD-GUI：http://laichao.googlecode.com/files/jdgui.zip
具體步驟：
首先將apk文件，將後綴改為zip，解壓，得到其中的classes.dex，它就是java文件編譯再通過dx工具打包而成的；
解壓下載的dex2jar，將classes.dex復制到dex2jar.bat所在目錄。在命令行下定位到dex2jar.bat所在目錄(在DOS命令下CD 目錄)
運行
dex2jar.bat classes.dex
生成
classes.dex.dex2jar.jar
生成jar文件的截圖如下：
運行JD-GUI（jd-gui.exe），打開上面生成的jar包，即可看到源代碼了
HelloAndroid源碼（編譯前的apk源碼對照）如下：
二、反編譯apk生成程序的源代碼和圖片、XML配置、語言資源等文件
如果是漢化軟體，這將特別有用。首先還是下載工具，這次用到的是apktool
下載地址：http://code.google.com/p/android-apktool/downloads/list
下載：apktool1.4.1.tar.bz2 和 apktool-install-windows-r04-brut1.tar.bz2（兩個包都下載）
具體步驟：
將下載的兩個包解壓到同一個文件夾下，應該會有三個文件：aapt.exe，apktool.bat，apktool.jar
在命令行下定位到apktool.bat文件夾，輸入以下命令：apktool d C:\*.apk C:\*文件夾，如下圖：
命令行解釋：apktool d [apk文件 ] [輸出文件夾]
反編譯的文件如下（AndroidManifest.xml為例）：
特別注意：你要反編譯的文件一定要放在C盤的根目錄里（其實不用放在C盤根目錄也行）
例如：在D盤目錄D:\apktool1.4.1
cd /d D:\apktool1.4.1 //切換到D盤目錄，包含HelloAndroid.apk以及aapt.exe，apktool.bat，apktool.jar三個文件
apktool.bat d -f HelloAndroid.apk HelloAndroid // apktool反編譯命令，注意 d和
-f 的寫法
將反編譯完的文件重新打包成apk，很簡單，輸入apktool b c:\***文件夾（你編譯出來文件夾）即可，命令如下：這個主意你文件所在盤
打包apk後的文件在目錄C:\HelloAndroid下，生成了兩個文件夾：
build
dist
其中，打包生成的HelloAndroid.apk，在上面的dist文件夾下，Ok
最後，再介紹一款剛出來的反編譯工具 Androidfby ，它是一款對上述步驟進行了封裝的圖形界面工具，下載地址
但是，針對部分簽名的apk，無法實現反編譯，但本博客方法則仍然可以反編譯成功！僅供參考使用
另外，作為應用開發者，肯定不希望自己的代碼被反編譯的，下一遍博客將講述如何通過混淆代碼防止被別人反編譯
Android如何防止apk程序被反編譯
作為Android應用開發者，不得不面對一個尷尬的局面，就是自己辛辛苦苦開發的應用可以被別人很輕易的就反編譯出來。
Google似乎也發現了這個問題，從SDK2.3開始我們可以看到在android-sdk-windows\tools\下面多了一個proguard文件夾
proguard是一個java代碼混淆的工具，通過proguard，別人即使反編譯你的apk包，也只會看到一些讓人很難看懂的代碼，從而達到保護代碼的作用。
下面具體說一說怎麼樣讓SDK2.3下的proguard.cfg文件起作用，先來看看android-sdk-windows\tools\lib\proguard.cfg的內容：
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1. -optimizationpasses 5
2. -dontusemixedcaseclassnames
3. -
4. -dontpreverify
5. -verbose
6. -optimizations !code/simplification/arithmetic,!field/*,!class/merging/*
7.
8. -keep public class * extends android.app.Activity
9. -keep public class * extends android.app.Application
10. -keep public class * extends android.app.Service
11. -keep public class * extends android.content.BroadcastReceiver
12. -keep public class * extends android.content.ContentProvider
13. -keep public class * extends android.app.backup.BackupAgentHelper
14. -keep public class * extends android.preference.Preference
15. -keep public class com.android.vending.licensing.ILicensingService
16.
17. -keepclasseswithmembernames class * {
18. native <methods>;
19. }
20.
21. -keepclasseswithmembernames class * {
22. public <init>(android.content.Context, android.util.AttributeSet);
23. }
24.
25. -keepclasseswithmembernames class * {
26. public <init>(android.content.Context, android.util.AttributeSet, int);
27. }
28.
29. -keepclassmembers enum * {
30. public static **[] values();
31. public static ** valueOf(java.lang.String);
32. }
33.
34. -keep class * implements android.os.Parcelable {
35. public static final android.os.Parcelable$Creator *;
36. }
從腳本中可以看到，混淆中保留了繼承自Activity、Service、
Application、BroadcastReceiver、ContentProvider等基本組件以及
com.android.vending.licensing.ILicensingService，
並保留了所有的Native變數名及類名，所有類中部分以設定了固定參數格式的構造函數，枚舉等等。(詳細信息請參考<proguard_path>/examples中的例子及注釋。)
讓proguard.cfg起作用的做法很簡單，就是在eclipse自動生成的default.properties文件中加上一句「proguard.config=proguard.cfg」就可以了
完整的default.properties文件應該如下：
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1. # This file is automatically generated by Android Tools.
2. # Do not modify this file -- YOUR CHANGES WILL BE ERASED!
3. #
4. # This file must be checked in Version Control Systems.
5. #
6. # To customize properties used by the Ant build system use,
7. # "build.properties", and override values to adapt the script to your
8. # project structure.
9.
10. # Project target.
11. target=android-9
12. proguard.config=proguard.cfg
大功告成，正常的編譯簽名後就可以防止代碼被反編譯了。反編譯經過代碼混淆的apk得到的代碼應該類似於下面的效果，是很難看懂的：
如果您使用的是2.3之前的SDK版本也沒關系，把上面的proguard.cfg文件復制一份放到項目中，然後進行相同的操作即可