I am not able to get the currentActivity,and i am getting the following error

java.lang.NoSuchFieldError: no “Ljava/lang/Object;” field “currentActivity” in class “Lcom/unity/unity3d/player/UnityPlayer;” or its superclassess com.unity3d.player.UnityPlayer

void Start () %|724096949_1|% ajc1 = new AndroidJavaClass(className); ajc2 = new AndroidJavaClass ("com.unity3d.player.UnityPlayer"); %|160936248_4|% adhancrListener = new AndroidJavaClass("com.adhancr.adhancrlistener"); } public void Initialize() %|-1250893830_7|% %|-703970943_8|% %|-783240050_9|%

here's my android manifest file:

<?xml version="1.0" encoding="utf-8"?> <manifest xmlns:android="http://schemas.android.com/apk/res/android" package="com.adhancr.adhancr" android:versionCode="1" android:versionName="1.0" > <application> <activity android:name="com.google.android.gms.ads.AdActivity" android:theme="@android:style/Theme.Translucent" android:configChanges="keyboard|keyboardHidden|orientation|screenLayout|uiMode|screenSize|smallestScreenSize"/> <activity android:name="com.inmobi.androidsdk.IMBrowserActivity" android:configChanges="keyboardHidden|orientation|keyboard|smallestScreenSize|screenSize" android:theme="@android:style/Theme.Translucent.NoTitleBar" android:hardwareAccelerated="true" /> </application> </manifest>