NoClassDefFoundError Proguard活动

Question

我使用Proguard来混淆我的Android应用。 除了java.lang.NoClassDefFoundError: com.myapp.android.MediaActivity 之外，一切都很完美。

Activity

当我不使用Proguard时，Activity工作正常。我在使用Proguard时只遇到这个问题。

我的AndroidManifest已在Activity上宣布，我的所有其他人-dontpreverify -repackageclasses '' -allowaccessmodification -optimizations !code/simplification/arithmetic -keepattributes *Annotation* -keep class com.myapp.android.MediaActivity { *; } -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.view.View { public <init>(android.content.Context); public <init>(android.content.Context, android.util.AttributeSet); public <init>(android.content.Context, android.util.AttributeSet, int); public void set*(...); } -keepclasseswithmembers class * { public <init>(android.content.Context, android.util.AttributeSet); } -keepclasseswithmembers class * { public <init>(android.content.Context, android.util.AttributeSet, int); } -keepclassmembers class * implements android.os.Parcelable { static android.os.Parcelable$Creator CREATOR; } -keepclassmembers class **.R$* { public static <fields>; } -keepclassmembers class * { @android.webkit.JavascriptInterface <methods>; } # Also keep - Enumerations. Keep the special static # methods that are required in enumeration classes. -keepclassmembers enum * { public static **[] values(); public static ** valueOf(java.lang.String); } # We want to keep methods in Activity that could be used in the XML attribute onClick -keepclassmembers class * extends android.app.Activity { public void *(android.view.View); } # keep setters in Views so that animations can still work. # see http://proguard.sourceforge.net/manual/examples.html#beans -keepclassmembers public class * extends android.view.View { void set*(***); *** get*(); } # We want to keep methods in Activity that could be used in the XML attribute onClick -keepclassmembers class * extends android.app.Activity { public void *(android.view.View); } # For enumeration classes, see http://proguard.sourceforge.net/manual/examples.html#enumerations -keepclassmembers enum * { public static **[] values(); public static ** valueOf(java.lang.String); } -keep class * implements android.os.Parcelable { public static final android.os.Parcelable$Creator *; } -keepclassmembers class **.R$* { public static <fields>; } 都正常工作，我只对这一特定问题感到疑惑。

这是我的Proguard配置：

-keep class com.myapp.android.MediaActivity { *; }

正如您所看到的，我还添加了这一特定的行以尝试使其有效，但事实并非如此：

import android.annotation.TargetApi;
import android.app.Activity;
import android.content.Intent;
import android.os.Build;
import android.os.Bundle;
import android.support.v4.app.Fragment;
import android.support.v4.app.FragmentManager;
import android.support.v4.app.FragmentTransaction;
import android.support.v7.widget.Toolbar;
import android.view.View;
import android.widget.TextView;

import com.myapp.android.fragment.places.FragmentSupportPlacesBase;
import com.myapp.android.fragment.grid.BaseCursorGridFragmentSupport;
import com.myapp.android.fragment.grid.SupportScreenShotCursorGridFragment;
import com.myapp.android.fragment.grid.SupportTimelineCursorGridFragment;
import com.myapp.android.model.Place;
import com.myapp.android.model.SelectedInfo;

import java.util.ArrayList;
import java.util.List;

编辑： 以下是MediaActivity的导入：

using(var connection = new MySqlConnection(connectionString)) 
{
    connection.Open();
    using(var command = new MySqlCommand()) 
    {
        command.Connection = connection;
        command.CommandText = @"INSERT INTO rookstayers (name, sex, vocation, level, achievements, world, lastlogin, accountstatus, onlinestatus) VALUES (@name, @sex, @vocation, @level, @achievements, @world, @lastLogin, @accountStatus, @onlineStatus)";
        command.Prepare();

        foreach(var rooker in Players) 
        {
            command.Parameters.Clear();
            command.Parameters.AddWithValue("@name", rooker.Name);
            command.Parameters.AddWithValue("@sex", rooker.Sex);
            command.Parameters.AddWithValue("@vocation", rooker.Vocation);
            command.Parameters.AddWithValue("@level", rooker.Level);
            command.Parameters.AddWithValue("@achievements", rooker.Achievements);
            command.Parameters.AddWithValue("@world", rooker.World);
            command.Parameters.AddWithValue("@lastLogin", rooker.LastLogin);
            command.Parameters.AddWithValue("@accountStatus", rooker.AccountStatus);
            command.Parameters.AddWithValue("@onlineStatus", rooker.OnlineStatus);
            command.ExecuteNonQuery();
        }
    }
}

有没有人知道它为什么会发生以及如何解决？

Answer 1

感谢antonio指出我正确的方向。 我的Activity正在实施接口PlacesCallbacks（无缘无故）

public interface PlacesCallbacks{
    void onPlaceSelected(long quadKey, short zoomLevel);
    void onPlaceSelected(Place place);
}

但是此Interface中没有使用此Activity，而且我的应用中的任何地方都没有使用，并且实施的方法都是空的。

所以我猜Proguard删除了这个Interface，因为它并没有在任何地方使用，但它是在Activity中实现的。

我所要做的只是删除Interface。