然后使用javac Example.java编译Java代码,并使用javah生成C头文件。 C代码实现 (Example.c) #include<jni.h>#include"Example.h"// 实现native方法JNIEXPORT jint JNICALLJava_Example_add(JNIEnv*env,jobject obj,jint a,jint b){returna+b;} 1. 2. 3. 4. 5. 6. 7. 最后编译C代码并生成动态链接库...
2468 CHECK_NON_NULL_ARGUMENT_FN_NAME("RegisterNatives", java_class, JNI_ERR); 2469 ScopedObjectAccess soa(env); 2470 StackHandleScope<1> hs(soa.Self()); 2471 Handle<mirror::Class> c = hs.NewHandle(soa.Decode<mirror...
So let's take the example of a call the Java main() function, which looks like: class MyTest { ... public static void main (String[] args) { // test in java //… some code here. } } Calling this function from C++ is a little bit more complex. First, the signature of the ...
首先,我们需要编写C++代码,如下所示: #include<jni.h>#include<QtAndroid>extern"C"{JNIEXPORT jstring JNICALLJava_com_example_myapp_MainActivity_getAndroidVersion(JNIEnv*env,jobject/* this */){returnenv->NewStringUTF("Android version is: 12");}} 1. 2. 3. 4. 5. 6. 7. 8. 9. 编译共享...
*/JNIEXPORTvoidJNICALLJava_com_example_zeking_lsn9_FileUtils_diff(JNIEnv*env,jclass clazz,jstring path,jstring pattern_Path,jint file_num){LOGI("JNI Begin...%s..","Zeking Hello");} jvm是虚拟机内存 , C/C++是native内存 , 并且这个so库是放在apk的lib下面的 那...
通过函数指针来进行调用的.//调用函数的第一种方法:(**env).func//第二种方式:(*env)->//jstring Java_com_example_hellojni_HelloJni_stringFromJNI( JNIEnv* env,//jobject thiz )//jString是Java的String类型在C里面具体的表示的方式.jstring Java_com_itheima_hello_MainActivity_helloInC( JNIEnv*env...
JNI是Java本地接口(Java Native Interface)的简称。它定义了托管代码(用Java编程语言写的)与本地代码(用C/C++写的)交互的一种方式(译者注:这里的托管代码应该理 解成受Java运行时环境监管的代码)。它与厂商无关,支持从动态共享库中加载代码,虽然繁琐但有时是合理有效的。
#include<jni.h>extern"C"JNIEXPORTvoidJNICALLJava_com_example_app_Main_foo(JNIEnv* env, jobject o) {//Do stuff here!} Now you can invokefoo()in Java/Kotlin code just like a normal method, and your C/C++ implementation will be called. ...
Classfile /C:/Users/Zeking/Desktop/Lsn9/app/src/main/java/com/example/zeking/lsn9/FileUtils.class Last modified2017-9-2; size469bytesMD5 checksum19201ed5479758e0dfffb63528653a65 Compiled from"FileUtils.java"publicclass com.example.zeking.lsn9.FileUtils ...
Classfile /C:/Users/Zeking/Desktop/Lsn9/app/src/main/java/com/example/zeking/lsn9/FileUtils.class Last modified 2017-9-2; size 469 bytes MD5 checksum 19201ed5479758e0dfffb63528653a65 Compiled from "FileUtils.java"public class com.example.zeking.lsn9.FileUtils ...