ERROR: Build Release Android

i meet error when i build release
this is my native.log:

[proguard] Warning: library class android.webkit.WebView depends on program class android.net.http.SslCertificate
[proguard] Warning: library class android.webkit.WebView depends on program class android.net.http.SslCertificate
[proguard] Warning: library class android.webkit.WebViewClient depends on program class android.net.http.SslError
[proguard] Note: there were 9 references to unknown classes.
[proguard] You should check your configuration for typos.
[proguard] Note: there were 217 unkept descriptor classes in kept class members.
[proguard] You should consider explicitly keeping the mentioned classes
[proguard] (using ‘-keep’).
[proguard] Note: there were 31 unresolved dynamic references to classes or interfaces.
[proguard] You should check if you need to specify additional program jars.
[proguard] Note: there were 19 accesses to class members by means of introspection.
[proguard] You should consider explicitly keeping the mentioned class members
[proguard] (using ‘-keep’ or ‘-keepclassmembers’).
[proguard] Warning: there were 4 instances of library classes depending on program classes.
[proguard] You must avoid such dependencies, since the program classes will
[proguard] be processed, while the library classes will remain unchanged.

@slackmoehrle help me, please :((

Does this produce a build error or is it informational?

yes, i build failed
and error below:
sdk\tools\ant\build.xml:871: Please correct the above warnings first.

if i NOT add sdkbox -> build success.
but if t add facebook plugin and onesignal plugin -> build failed

I think the build failed is due to sdkbox,
@yinjimmy can u help me??

this start error here:

[proguard] Note: duplicate definition of library class [android.net.http.SslCertificate]
[proguard] Note: duplicate definition of library class [android.net.http.SslError]
[proguard] Note: duplicate definition of library class [android.net.http.SslCertificate$DName]
[proguard] Note: duplicate definition of library class [org.apache.http.conn.scheme.SocketFactory]
[proguard] Note: duplicate definition of library class [org.apache.http.conn.scheme.HostNameResolver]
[proguard] Note: duplicate definition of library class [org.apache.http.conn.ConnectTimeoutException]
[proguard] Note: duplicate definition of library class [org.apache.http.params.HttpParams]

plz remove the apache http jar,

find . -name "*apache*"

tks u, i will try

i builded success but app is crash when i lunch app
i checked logcat and see error note like below:

E JniHelper: Failed to find static method id of setAnimationInterval
10-29 00:40:22.615 29675 29694 E JniHelper: Failed to find static java method. Class name: org/cocos2dx/lib/Cocos2dxRenderer, method name: setAnimationInterval, signature: (F)V
10-29 00:40:22.617 29675 29694 E JniHelper: Failed to find static method id of setAnimationInterval
10-29 00:40:22.617 29675 29694 E JniHelper: Failed to find static java method. Class name: org/cocos2dx/lib/Cocos2dxRenderer, method name: setAnimationInterval, signature: (F)V
10-29 00:40:22.648 29675 29694 E AndroidRuntime: FATAL EXCEPTION: GLThread 16133
10-29 00:40:22.648 29675 29694 E AndroidRuntime: Process: org.cocos2d.helloworld, PID: 29675
10-29 00:40:22.648 29675 29694 E AndroidRuntime: java.lang.ClassNotFoundException: Didn’t find class “org.cocos2dx.lib.Cocos2dxDownloader” on path: DexPathList[[zip file “/data/app/org.cocos2d.helloworld-O25ZGhHurUDmJeQ7DVBCcA==/base.apk”],nativeLibraryDirectories=[/data/app/org.cocos2d.helloworld-O25ZGhHurUDmJeQ7DVBCcA==/lib/arm, /system/fake-libs, /data/app/org.cocos2d.helloworld-O25ZGhHurUDmJeQ7DVBCcA==/base.apk!/lib/armeabi-v7a, /system/lib, /system/vendor/lib]]
10-29 00:40:22.648 29675 29694 E AndroidRuntime: at dalvik.system.BaseDexClassLoader.findClass(BaseDexClassLoader.java:93)
10-29 00:40:22.648 29675 29694 E AndroidRuntime: at java.lang.ClassLoader.loadClass(ClassLoader.java:379)
10-29 00:40:22.648 29675 29694 E AndroidRuntime: at java.lang.ClassLoader.loadClass(ClassLoader.java:312)
10-29 00:40:22.648 29675 29694 E AndroidRuntime: at org.cocos2dx.lib.Cocos2dxRenderer.nativeInit(Native Method)
10-29 00:40:22.648 29675 29694 E AndroidRuntime: at org.cocos2dx.lib.Cocos2dxRenderer.onSurfaceCreated(Unknown Source:4)
10-29 00:40:22.648 29675 29694 E AndroidRuntime: at android.opengl.GLSurfaceView$GLThread.guardedRun(GLSurfaceView.java:1539)
10-29 00:40:22.648 29675 29694 E AndroidRuntime: at android.opengl.GLSurfaceView$GLThread.run(GLSurfaceView.java:1270)