Android如何防止apk程式被反編譯
操作方法
（01）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-windowstools下面多了一個proguard資料夾proguard是一個java程式碼混淆的工具,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程式碼,從而達到保護程式碼的作用。下面具體說一說怎麼樣讓SDK2.3下的檔案起作用,先來看看android-sdk-windowstoolslib的內容:[html] view plaincopyprint?1.-optimizationpasses 5 2.-dontusemixedcaseclassnames 3.-dontskipnonpubliclibraryclasses 4.-dontprevERify 5.-verbose 6.-optimizations !code/simplification/arithmetic,!field/*,!class/merging/* 7. 8.-keep public class * extends vity 9.-keep public class * extends ication 10.-keep public class * extends ice 11.-keep public class * extends dcastReceiver 12.-keep public class * extends entProvider 13.-keep public class * extends upAgentHelper 14.-keep public class * extends erence 15.-keep public class ensingService 16. 17.-keepclasseswithmembernames class * { 18. native <methods>; 19.} 20. 21.-keepclasseswithmembernames class * { 22. public <init>(ext, ibuteSet); 23.} 24. 25.-keepclasseswithmembernames class * { 26. public <init>(ext, ibuteSet, int); 27.} 28. 29.-keepclassmembers enum * { 30. public static **[] values(); 31. public static ** valueOf(ng); 32.} 33. 34.-keep class * implements elable { 35. public static final elable$Creator *; 36.} -optimizationpasses 5-dontusemixedcaseclassnames-dontskipnonpubliclibraryclasses-dontpreverify-verbose-optimizations !code/simplification/arithmetic,!field/*,!class/merging/*-keep public class * extends vity-keep public class * extends ication-keep public class * extends ice-keep public class * extends dcastReceiver-keep public class * extends entProvider-keep public class * extends upAgentHelper-keep public class * extends erence-keep public class ensingService-keepclasseswithmembernames class * { native <methods>;}-keepclasseswithmembernames class * { public <init>(ext, ibuteSet);}-keepclasseswithmembernames class * { public <init>(ext, ibuteSet, int);}-keepclassmembers enum * { public static **[] values(); public static ** valueOf(ng);}-keep class * implements elable { public static final elable$Creator *;}從指令碼中可以看到,混淆中保留了繼承自Activity、Service、Application、BroadcastReceiver、ContentProvider等基本元件以及ensingService,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引數格式的建構函式,列舉等等。(詳細資訊請參考<proguard_path>/examples中的例子及註釋。)讓起作用的做法很簡單,就是在eclipse自動生成的erties檔案中加上一句“ig=”就可以了完整的erties檔案應該如下:[html] view plaincopyprint?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.# "erties", and override values to adapt the script to your 8.# project structure. 9. 10.# Project target. et=android-9 ig= # 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 use,# "erties", and override values to adapt the script to your# project structure.# Project et=ig=大功告成,正常的編譯簽名後就可以防止程式碼被反編譯了。反編譯經過程式碼混淆的apk得到的程式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版本也沒關係,把上面的檔案複製一份放到專案中,然後進行相同的操作即可。
