env->ReleaseByteArrayElements(barr, ba, 0); return rtn; } 1. 2. 3. 4. 5. 6. 7. 8. 9. 10. 11. 12. 13. 14. 15. 16. 17. 18. 3.如何将C里的char*类型转换为java里的string类型: jstring stoJstring(JNIEnv* env, const char* pat)//change type char* into string { jclass str...
2484 return JNI_ERR; 2485 } else if (UNLIKELY(sig == nullptr)) { 2486 ReportInvalidJNINativeMethod(soa, c.Get(), "method signature", i); 2487 return JNI_ERR; 2488 } else if (UNLIKELY(fnPtr == nullptr)) { 2489...
if NewString returns a non-NULL value, you don't need to check for an exception. However, if you call a method (using a function like CallObjectMethod), you must always check for an exception, because the return value is not going to be valid if an exception ...
mapLibraryName(libraryName) + "\""); } String error = nativeLoad(filename, loader); if (error != null) { throw new UnsatisfiedLinkError(error); } return; } } private static native String nativeLoad(String filename, ClassLoader loader); so文件所在目录 nativeLibraryDirectories.png 代码语言:...
env->ReleaseByteArrayElements(barr, ba,0);returnrtn; } 3.如何将C里的char*类型转换为java里的string类型: jstring stoJstring(JNIEnv* env,constchar* pat)//change type char* into string{ jclass strClass= env->FindClass("Ljava/lang/String;"); ...
extern"C"JNIEXPORTjstringJNICALLJava_com_xuexiang_jnidemo_JNIApi_stringFromJNI(JNIEnv*env,jobject/* this */){std::string hello="Hello from C++";returnenv->NewStringUTF(hello.c_str());} 2.编写Android.mk 模版如下: 代码语言:javascript ...
CreateStringUTF(JNIEnv * env){return (*env)->NewStringUTF(env, "0");}JNIEXPORT void JNICALL Java_TestLocalReference_nativeMethod(JNIEnv * env, jobject obj, jint count){jint i = 0;for(; i<count; i++){ str = CreateStringUTF(env);}}运行结果JVMCI161: FATAL ERROR in native metho...
(*env)->GetStringUTFChars(env, name, NULL); if (str == NULL) { return NULL; /* OutOfMemoryError already thrown */ } printf("Hello %s", str); (*env)->ReleaseStringUTFChars(env, name, str); /* 假设输入字符不超过127个 */ scanf("%s", buf); return (*env)->NewStringUTF(env, ...
(*env)->GetStringUTFChars(env,prompt,NULL);if(str==NULL){returnNULL;/* OutOfMemoryError already thrown */}printf("%s",str);(*env)->ReleaseStringUTFChars(env,prompt,str);/* We assume here that the user does not type more than* 127 characters */scanf("%127s",buf);return(*env)->...
c_str = (*env)->GetStringCritical(env,j_str,NULL); // 返回源字符串指针的可能性 if (c_str == NULL) // 验证是否由于字符串拷贝内存溢出而返回NULL { return NULL; } while(*c_str) { *pBuff++ = *c_str++; } (*env)->ReleaseStringCritical(env,j_str,c_str); ...