I'm trying to implementing Box2D through NDK. But getting the
following exception,

10-14 10:59:22.983: ERROR/AndroidRuntime(745): Uncaught handler:
thread main exiting due to uncaught exception
10-14 10:59:23.042: ERROR/AndroidRuntime(745):
java.lang.RuntimeException: Unable to start activity ComponentInfo
{comNI.Box2dthrNDK/comNI.Box2dthrNDK.Box2dthrNDK}:
java.lang.NullPointerException

I am trying to access this method,

public void createWorld(float minX, float minY, float maxX,float maxY,
float gravityX, float gravityY);


I'm calling  from my view class as,

createWorld(0,0,50,50,0,10);

public native void createWorld(float minX, float minY, float maxX,
float maxY,     float gravityX, float gravityY);

Any one please help me. This is my first app in NDK.

Thanks in advance.
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