Android - 从JNI中传入UTF8的字符到Java

public class ReturnUTF8 {

static {
System.loadLibrary("ReturnUTF8Jni");
}

public static native byte[] method1();

public static native Object method2();

public static void main(String[] args) {
try {
byte[] buffer = ReturnUTF8.method1();
String s1 = new String(buffer, "UTF-8");
System.out.println("s1 = " + s1);

String s2 = ReturnUTF8.method2().toString();
System.out.println("s2 = " + s2);
} catch (java.io.UnsupportedEncodingException e) {
e.printStackTrace();
}
}
}

#include "ReturnUTF8.h"

JNIEXPORT jbyteArray JNICALL Java_ReturnUTF8_method1
(JNIEnv *env, jclass cls)
{
jbyte buffer[] = /*  UTF8 encoding buffer */
jbyteArray bytes = env->NewByteArray(sizeof(buffer));
env->SetByteArrayRegion(bytes, 0, sizeof(buffer), buffer);

return bytes;
}

JNIEXPORT jbyteArray JNICALL Java_ReturnUTF8_method2
(JNIEnv *env, jclass cls)
{
jbyte buffer[] = /*  UTF8 encoding buffer */
jbyteArray bytes = env->NewByteArray(sizeof(buffer));
env->SetByteArrayRegion(bytes, 0, sizeof(buffer), buffer);

jchar encoding_name[] = { 'U', 'T', 'F', '-', '8', '/0' };
jstring encoding = env->NewString(encoding_name, 5);

jclass theStringClass = env->FindClass("java/lang/String");
jmethodID mid = env->GetMethodID(theStringClass, "<init>", "([BLjava/lang/String;)V");

jobject result = env->NewObject(theStringClass, mid, bytes, encoding);

return result;
}