How to tell ProGuard to keep everything in a particular package?

Question

My application has many activities and uses native library too. With the default ProGuard configuration which Eclipse generates ProGuard removes many things - OnClick methods, static members, callback methods which my native library uses... Is it there a simple way to instruct ProGuard to NOT remove anything from my package? Removing things saves only about 2.5% of the application size, but breaks my application completely. Configuring, testing and maintaining it class by class in ProGuard configuration would be a pain.

Answer 1

I think you need to add these flags at the very least (modify for you individual package names):

-keep class javax.** { *; }
-keep class org.** { *; }
-keep class twitter4j.** { *; }

Also, add these flags:

-dontshrink
-dontoptimize
-dontpreverify

Here's my whole config file: of my Proguard.cfg:

-dontshrink
-dontoptimize
-dontpreverify
-verbose

-dontwarn javax.management.**
-dontwarn java.lang.management.**
-dontwarn org.apache.log4j.**
-dontwarn org.apache.commons.logging.**
-dontwarn org.slf4j.**
-dontwarn org.json.**


-keep public class * extends android.app.Activity
-keep public class * extends android.app.Application
-keep public class * extends android.app.Service
-keep public class * extends android.content.BroadcastReceiver
-keep public class * extends android.content.ContentProvider
-keep public class * extends android.app.backup.BackupAgentHelper
-keep public class * extends android.preference.Preference
-keep public class com.android.vending.licensing.ILicensingService
-keep class javax.** { *; }
-keep class org.** { *; }
-keep class twitter4j.** { *; }

-keepclasseswithmembernames class * {
    native <methods>;
}

-keepclasseswithmembernames class * {
    public <init>(android.content.Context, android.util.AttributeSet);
}

-keepclasseswithmembernames class * {
    public <init>(android.content.Context, android.util.AttributeSet, int);
}

-keepclassmembers enum * {
    public static **[] values();
    public static ** valueOf(java.lang.String);
}


-keep class * implements android.os.Parcelable {
  public static final android.os.Parcelable$Creator *;
}