{"id":1104,"date":"2009-07-10T16:14:59","date_gmt":"2009-07-10T07:14:59","guid":{"rendered":"http:\/\/blog.bitmeister.jp\/?p=1104"},"modified":"2009-07-10T16:14:59","modified_gmt":"2009-07-10T07:14:59","slug":"jni%e3%81%a7%e8%b5%b7%e5%8b%95%e3%81%97%e3%81%9fjavavm%e3%81%8b%e3%82%89native%e3%83%a1%e3%82%bd%e3%83%83%e3%83%89%e3%82%92%e3%82%b3%e3%83%bc%e3%83%ab%e3%83%90%e3%83%83%e3%82%af","status":"publish","type":"post","link":"https:\/\/blog.bitmeister.jp\/?p=1104","title":{"rendered":"JNI\u3067\u8d77\u52d5\u3057\u305fJavaVM\u304b\u3089native\u30e1\u30bd\u30c3\u30c9\u3092\u30b3\u30fc\u30eb\u30d0\u30c3\u30af"},"content":{"rendered":"<p>JNI\u3092\u4f7f\u3063\u3066C\u306a\u3069\u306enative\u30d7\u30ed\u30bb\u30b9\u304b\u3089JavaVM\u3092\u8d77\u52d5\u3057\u3001\u3055\u3089\u306b\u305d\u306eJavaVM\u304b\u3089native\u30e1\u30bd\u30c3\u30c9\u3092\u30b3\u30fc\u30eb\u30d0\u30c3\u30af\u3055\u305b\u308b\u65b9\u6cd5\u3067\u3059\u3002Web\u3067\u8abf\u3079\u305f\u969b\u306b\u3001\u610f\u5916\u3068\u60c5\u5831\u304c\u898b\u3064\u304b\u3089\u306a\u304b\u3063\u305f\u306e\u3067\u30e1\u30e2\u3002<\/p>\n<p>\u7d50\u8ad6\u304b\u3089\u8a00\u3063\u3066\u3057\u307e\u3046\u3068\u3001RegisterNatives\u3068\u3044\u3046JNI\u95a2\u6570\u3092\u4f7f\u7528\u3057\u307e\u3059\u3002\u3053\u306e\u95a2\u6570\u306f\u3001jclass\u3068JNINativeMethod\u69cb\u9020\u4f53\u306e\u914d\u5217\u3092\u5f15\u6570\u306b\u53d6\u308a\u3001Java\u5074\u306enative\u30e1\u30bd\u30c3\u30c9\u5ba3\u8a00\u3068native\u5074\u306e\u30e1\u30bd\u30c3\u30c9\u672c\u4f53\u3092\u52d5\u7684\u306b\u7d50\u3073\u3064\u3051\u307e\u3059\u3002<\/p>\n<p>\u5177\u4f53\u7684\u306a\u4f7f\u3044\u65b9\u306f\u3001\u4ee5\u4e0b\u306e\u30b5\u30f3\u30d7\u30eb\u30b3\u30fc\u30c9\u3092\u53c2\u8003\u306b\u3057\u3066\u304f\u3060\u3055\u3044\u3002<br \/>\n<!--more--><\/p>\n<p>\u307e\u305a\u306f\u3001native\u306e\u30b3\u30fc\u30eb\u30d0\u30c3\u30af\u30e1\u30bd\u30c3\u30c9\u3092\u6301\u3064Java\u30af\u30e9\u30b9\u3092\u4f5c\u6210\u3002<\/p>\n<pre class=\"c\" name=\"code\">\r\npackage jnitest;\r\n\r\npublic class JniTest {\r\n\t\r\n\t\/\/ native\u304b\u3089\u547c\u3070\u308c\u308b\u30e1\u30bd\u30c3\u30c9\r\n\tpublic boolean entryMethod() {\r\n\t\tSystem.out.println(\"Java Method.\");\r\n\t\treturn callbackMethod();\r\n\t}\r\n\r\n\t\/\/ JavaVM\u304b\u3089\u547c\u3073\u51fa\u3059\u30e1\u30bd\u30c3\u30c9\r\n\tprivate native boolean callbackMethod();\r\n\t\r\n}\r\n<\/pre>\n<p>C(native)\u5074\u306b\u306f\u3001Java\u5074\u306b\u5b9a\u7fa9\u3057\u305f\u30b3\u30fc\u30eb\u30d0\u30c3\u30af\u30e1\u30bd\u30c3\u30c9\u306b\u5408\u308f\u305b\u305fnative\u30e1\u30bd\u30c3\u30c9\u3092\u4f5c\u6210\u3057\u3001RegisterNatives\u30e1\u30bd\u30c3\u30c9\u3067JavaVM\u306b\u767b\u9332\u3057\u307e\u3059\u3002<\/p>\n<pre class=\"c\" name=\"code\">\r\n\r\n\/\/ JavaVM\u304b\u3089\u547c\u3070\u308c\u308b\u30e1\u30bd\u30c3\u30c9\r\njboolean nativeCallback(JNIEnv* env, jobject obj) {\r\n\tfprintf(stdout, \"Native Callback Method.\\n\");\r\n\treturn JNI_TRUE;\r\n}\r\n\r\nint main(void) {\r\n\r\n\t\/\/ JavaVM\u8d77\u52d5\u3001JNIEnv\u53d6\u5f97\u51e6\u7406(\u7701\u7565)\r\n\r\n\t\/\/ native\u30e1\u30bd\u30c3\u30c9\u3092\u767b\u9332\r\n\tjclass jni_test_class = env->FindClass(\"jnitest\/JniTest\");\r\n\tJNINativeMethod native_method = {\"callbackMethod\", \"()Z\", nativeCallback};\r\n\tenv->RegisterNatives(jni_test_class, &native_method, 1);\r\n<\/pre>\n<p>\u767b\u9332\u3092\u884c\u3063\u305f\u5f8c\u3001Java\u306eentryMethod()\u3092\u547c\u3073\u51fa\u3059\u3068\u3001<\/p>\n<pre class=\"c\" name=\"code\">\r\n\t\/\/ JniTest\u30aa\u30d6\u30b8\u30a7\u30af\u30c8\u3092\u751f\u6210\r\n\tjmethodID init_method = env->GetMethodID(jni_test_class, \"&lt;init&gt;\", \"()V\");\r\n\tjobject jni_test_obj = env->NewObject(jni_test_class, init_method);\r\n\r\n\t\/\/ entryMethod\u3092\u547c\u3073\u51fa\u3059\r\n\tjmethodID entry_method = env->GetMethodID(jni_test_class, \"entryMethod\", \"()Z\");\r\n\tenv->CallBooleanMethod(jni_test_obj, entry_method);\r\n<\/pre>\n<p>JavaVM\u304b\u3089nativeCallback()\u304c\u547c\u3073\u51fa\u3055\u308c\u3001\u7121\u4e8b\u3001\u4ee5\u4e0b\u306e\u51fa\u529b\u304c\u5f97\u3089\u308c\u307e\u3059\u3002<br \/>\n<code><br \/>\nJava Method.<br \/>\nNative Callback Method.<br \/>\n<\/code><\/p>\n<p>\u4f59\u8ac7\u3067\u3059\u304c\u3001\u4e0a\u306b\u3082\u66f8\u3044\u305f\u3088\u3046\u306b\u3001\u30cd\u30c3\u30c8\u691c\u7d22\u3067\u306f\u3053\u306e\u65b9\u6cd5\u304c\u898b\u3064\u3051\u3089\u308c\u307e\u305b\u3093\u3067\u3057\u305f\u3002\u306a\u306e\u3067\u6700\u521d\u306f\u3001\u30b3\u30fc\u30eb\u30d0\u30c3\u30af\u95a2\u6570\u306e\u30dd\u30a4\u30f3\u30bf\u3092jint\u578b\u306b\u30ad\u30e3\u30b9\u30c8\u3057\u3066JavaVM\u306e\u30e1\u30bd\u30c3\u30c9\u306b\u6e21\u3057\u3066\u304a\u304d\u3001JavaVM\u304b\u3089native\u30e1\u30bd\u30c3\u30c9\u3078\u306e\u5f15\u6570\u3068\u3057\u3066\u3053\u306ejint\u3092\u6e21\u3057\u3066\u3001native\u30e1\u30bd\u30c3\u30c9\u3067\u518d\u5ea6jnit\u3092\u95a2\u6570\u30dd\u30a4\u30f3\u30bf\u306b\u30ad\u30e3\u30b9\u30c8\u3057\u76f4\u3057\u3066\u30b3\u30fc\u30eb\u30d0\u30c3\u30af\u95a2\u6570\u3092\u547c\u3073\u51fa\u3059\u3068\u3044\u3046\u65b9\u6cd5\u3082\u8a66\u3057\u305f\u308a\u3057\u3066\u3044\u307e\u3057\u305f\u3002<\/p>\n<p>\u3044\u3061\u304a\u3046\u547c\u3073\u51fa\u3057\u306f\u6210\u529f\u3057\u3066\u3044\u307e\u3057\u305f\u304c\u3001\u3069\u3046\u306b\u3082\u30c8\u30ea\u30c3\u30ad\u30fc\u3059\u304e\u308b\u306e\u3067\u66f8\u7c4d\u3092\u8cb7\u3063\u3066\u304d\u3066\u8abf\u3079\u305f\u3068\u3053\u308d\u3001\u3059\u3050\u306b\u6a19\u6e96\u306e\u65b9\u6cd5\u304c\u898b\u3064\u304b\u3063\u305f\u6b21\u7b2c\u3067\u3059\u3002\u3042\u307e\u308aGoogle\u5148\u751f\u306b\u983c\u308a\u3059\u304e\u308b\u306e\u3082\u8003\u3048\u7269\u3067\u3059\u306d\u3002<\/p>\n","protected":false},"excerpt":{"rendered":"<p>JNI\u3092\u4f7f\u3063\u3066C\u306a\u3069\u306enative\u30d7\u30ed\u30bb\u30b9\u304b\u3089JavaVM\u3092\u8d77\u52d5\u3057\u3001\u3055\u3089\u306b\u305d\u306eJavaVM\u304b\u3089native\u30e1\u30bd\u30c3\u30c9\u3092\u30b3\u30fc\u30eb\u30d0\u30c3\u30af\u3055\u305b\u308b\u65b9\u6cd5\u3067\u3059\u3002Web\u3067\u8abf\u3079\u305f\u969b\u306b\u3001\u610f\u5916\u3068\u60c5\u5831\u304c\u898b\u3064\u304b\u3089\u306a\u304b\u3063\u305f\u306e\u3067\u30e1\u30e2\u3002 \u7d50\u8ad6\u304b\u3089\u8a00\u3063\u3066\u3057 [&hellip;]<\/p>\n","protected":false},"author":4,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[17],"tags":[75,23,40],"class_list":["post-1104","post","type-post","status-publish","format-standard","hentry","category-tech","tag-c","tag-java","tag-40"],"_links":{"self":[{"href":"https:\/\/blog.bitmeister.jp\/index.php?rest_route=\/wp\/v2\/posts\/1104","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/blog.bitmeister.jp\/index.php?rest_route=\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/blog.bitmeister.jp\/index.php?rest_route=\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/blog.bitmeister.jp\/index.php?rest_route=\/wp\/v2\/users\/4"}],"replies":[{"embeddable":true,"href":"https:\/\/blog.bitmeister.jp\/index.php?rest_route=%2Fwp%2Fv2%2Fcomments&post=1104"}],"version-history":[{"count":7,"href":"https:\/\/blog.bitmeister.jp\/index.php?rest_route=\/wp\/v2\/posts\/1104\/revisions"}],"predecessor-version":[{"id":1111,"href":"https:\/\/blog.bitmeister.jp\/index.php?rest_route=\/wp\/v2\/posts\/1104\/revisions\/1111"}],"wp:attachment":[{"href":"https:\/\/blog.bitmeister.jp\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=1104"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/blog.bitmeister.jp\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=1104"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/blog.bitmeister.jp\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=1104"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}