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POAndroid ndk; How to create a 2d boolean array in c/c++ and return it to the Java?
 

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  1. POAndroid ndk; How to create a 2d boolean array in c/c++ and return it to the Java?
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    <p>So I've worked with the ndk/c/c++ a little bit, and I know about the jbooleanArray var type, but my question is how would I go about creating a 2d boolean array and returning it to the Java to be used? Here's an example:</p> <pre><code>#include "retrieveboolarray.h" #define LOG_TAG "!" //macros to call the Log functions to allow for debugging. the tag is declared on the line above #define LOGD(...) __android_log_print(ANDROID_LOG_DEBUG,LOG_TAG,__VA_ARGS__) #define LOGE(...) __android_log_print(ANDROID_LOG_ERROR,LOG_TAG,__VA_ARGS__) JNIEXPORT jint JNICALL Java_com_example_ndktesting_generateBoolArrays_retrieveBoolArray( JNIEnv * env, jobject obj, jint refNum) { //refNum will eventually be used to access certain arrays return refNum; } </code></pre> <p>so right now it's returning an integer, how would I generate a 2d bool array and return it to the Java?</p> <p>update: here is some code I've tried previously, still with no luck unfortunately</p> <pre><code>JNIEXPORT jobjectArray JNICALL Java_com_example_ndktesting_generateBoolArrays_retrieveBoolArray( JNIEnv * env, jobject obj, jint refNum) { jboolean flag = JNI_TRUE; jclass stringClass = (*env)-&gt;FindClass(env, "java/lang/Boolean"); jobjectArray row; jobjectArray rows; jboolean hello = 1; int MAXRESPONSE = 5; int MAXTEST = 5; jsize i, j; for (i = 0; i &lt; 5; i++) { row = (*env)-&gt;NewObjectArray(env, MAXRESPONSE, stringClass, 0); for (j = 0; j &lt; 3; j++) { (*env)-&gt;SetObjectArrayElement(env, row, j, hello); } if (flag == JNI_TRUE) { flag = JNI_FALSE; rows = (*env)-&gt;NewObjectArray(env, MAXTEST, (*env)-&gt;GetObjectClass(env, row), 0); } (*env)-&gt;SetObjectArrayElement(env, rows, i, row); } return rows; } </code></pre> <p>hopefully someone has an idea on how to fix this so I can make/return a bool array.</p>
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