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copied!<p>Thanks Timo for your help and link. For posterity, I'm adding a complete code set that would go through the process of generating a 2D primitive array consumable by Java, from an existing C 2D primitive array.</p> <pre><code>// Returns a 2D float array from C to Java jobjectArray ndk_test_getMy2DArray(JNIEnv* env, jobject thiz, jlong context) { // Cast my context reference MyContextRef contextRef = (MyContextRef) context; // Get the length for the first and second dimensions unsigned int length1D = MyContextGet1DLength(contextRef); unsigned int length2D = MyContextGet2DLength(contextRef); // Get the 2D float array we want to "Cast" float** primitive2DArray = MyContextGet2DArray(contextRef); // Get the float array class jclass floatArrayClass = (*env)->FindClass(env, "[F"); // Check if we properly got the float array class if (floatArrayClass == NULL) { // Ooops return NULL; } // Create the returnable 2D array jobjectArray myReturnable2DArray = (*env)->NewObjectArray(env, (jsize) length1D, floatArrayClass, NULL); // Go through the firs dimension and add the second dimension arrays for (unsigned int i = 0; i < length1D; i++) { jfloatArray floatArray = (*env)->NewFloatArray(env, length2D); (*env)->SetFloatArrayRegion(env, floatArray, (jsize) 0, (jsize) length2D, (jfloat*) primitive2DArray[i]); (*env)->SetObjectArrayElement(env, myReturnable2DArray, (jsize) i, floatArray); (*env)->DeleteLocalRef(env, floatArray); } // Return a Java consumable 2D float array return myReturnable2DArray; } </code></pre>

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