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PONewGlobalRef for jmethodID
 

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    <p>I have a problem with something that otherwise seems to be an easy task. I have a native method which returns a jobjectArray of instances of a Java class (custom). What I do is get the jclass for my class I want to instantiate and return and then get the jmethodID for it's constructor.</p> <p>The native method's signature is:</p> <pre><code>JNIEXPORT jobjectArray JNICALL Java_com_mn_rootscape_utils_NativeMethods_getFilesPermissions( JNIEnv* env, jobject thizz, jobjectArray filePathsArray ) </code></pre> <p>The namespace and constructor signature are defined as follows:</p> <pre><code>const char* kFilePermissionInfoPath = "com/mn/rootscape/utils/FilePermissionInfo"; const char* kFilePermInfoConstructorSig = "(IIIIIJJJLjava/lang/String;Ljava/lang/String;ZLjava/lang/String;)V"; </code></pre> <p>For the jclass and jmethodID I'm following the instructions posted <a href="http://android-developers.blogspot.ro/2011/11/jni-local-reference-changes-in-ics.html" rel="noreferrer">here</a>. So I'm getting their global references so I can use them later. Please note that I do not have an oninit in my lib yet, the code is just for testing for now.</p> <p>The problem is that I get a segmentation fault when I try to retrieve the global reference for the jmethodID.</p> <p>The code that does this is:</p> <pre><code>jclass filePermInfoCls = (*env)-&gt;FindClass(env, kFilePermissionInfoPath); if(!filePermInfoCls) { LOGE("getFilesPermissions: failed to get class reference."); return NULL; } gFilePermInfoClass = (jclass)(*env)-&gt;NewGlobalRef(env, filePermInfoCls); LOGI("got gFilePermInfoClass"); jmethodID filePermInfoClsConstructor = (*env)-&gt;GetMethodID(env, gFilePermInfoClass, "&lt;init&gt;", kFilePermInfoConstructorSig1); if(!filePermInfoClsConstructor) { LOGE("getFilesPermissions: failed to get method reference."); return NULL; } gFilePermInfoClsConstructor = (jmethodID)(*env)-&gt;NewGlobalRef(env, filePermInfoClsConstructor); LOGI("got gFilePermInfoClsConstructor"); </code></pre> <p>The actual error is:</p> <blockquote> <p>06-14 09:17:26.648: W/dalvikvm(26012): Invalid indirect reference 0x4c0bdc40 in decodeIndirectRef 06-14 09:17:26.648: E/dalvikvm(26012): VM aborting</p> </blockquote> <p>gFilePermInfoClass and gFilePermInfoClsConstructor are global jclass and jmethodID objects, to hold the global refs.</p> <p>Any help in this would be appreciated.</p> <p>Thanks</p>
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    1. USDarshan Rivka Whittle
    1. USMarcel N.
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