我已经在我的家乡,lib.cpp文件如下功能:的Android调用C++函数得到UnsatisfiedLinkError
JNIEXPORT jlong JNICALL
Java_com_example_z_myapplication_MainActivity_convert32to64(JNIEnv *env, jobject instance,
jlong l) {
// TODO
l = l + 76561197960265728L;
return l;
}
在我MainActivity.java:
public class MainActivity extends AppCompatActivity {
static {
System.loadLibrary("native-lib");
}
public static native long convert32to64(long l);
...
}
我有一个CMakeList.txt:
cmake_minimum_required(VERSION 3.4.1)
# Specifies a library name, specifies whether the library is STATIC or
# SHARED, and provides relative paths to the source code. You can
# define multiple libraries by adding multiple add.library() commands,
# and CMake builds them for you. When you build your app, Gradle
# automatically packages shared libraries with your APK.
add_library(# Specifies the name of the library.
native-lib
# Sets the library as a shared library.
SHARED
# Provides a relative path to your source file(s).
src/cpp/native-lib.cpp)
但是我收到此错误:
java.lang.UnsatisfiedLinkError: No implementation found for long com.example.z.myapplication.MainActivity.convert32to64(long) (tried Java_com_example_z_myapplication_MainActivity_convert32to64 and Java_com_example_z_myapplication_MainActivity_convert32to64__J)
谁能告诉我这里怎么了?
我刚刚添加了extern“C”,它仍然表示错误 –
@TomDawn是正确重新编译的共享库,它可以在运行时由Java代码访问吗?请注意,Android示例建议在编译一次后注释掉本地lib模块 – nandsito
我只需添加extern“C”并单击run以开始在模拟器中运行。你能告诉我如何重新编译它吗?对不起,也许这是一个愚蠢的问题 –