我試圖從C ++獲得一個簡單的Java方法調用，而Java調用本機方法。這是Java代碼：public class MainActivity extends Activity {    private static String LIB_NAME = "name";    static {        System.loadLibrary(LIB_NAME);    }    /** Called when the activity is first created. */    @Override    public void onCreate(Bundle savedInstanceState) {        super.onCreate(savedInstanceState);        setContentView(R.layout.main);        TextView tv = (TextView) findViewById(R.id.textview);        tv.setText(this.getJniString());    }    public void messageMe(String text) {        System.out.println(text);    }    public native String getJniString();}我試圖messageMe在getJniString*從Java到本機的方法調用過程中從本機代碼調用方法。native.cpp：#include <string.h>#include <stdio.h>#include <jni.h>jstring Java_the_package_MainActivity_getJniString( JNIEnv* env, jobject obj, jint depth ){//    JavaVM *vm;//    JNIEnv *env;//    JavaVMInitArgs vm_args;//    vm_args.version = JNI_VERSION_1_2;//    vm_args.nOptions = 0;//    vm_args.ignoreUnrecognized = 1;////    // Construct a VM//    jint res = JNI_CreateJavaVM(&vm, (void **)&env, &vm_args);    // Construct a String    jstring jstr = env->NewStringUTF("This string comes from JNI");    // First get the class that contains the method you need to call    jclass clazz = env->FindClass("the/package/MainActivity");    // Get the method that you want to call    jmethodID messageMe = env->GetMethodID(clazz, "messageMe", "(Ljava/lang/String;)V");    // Call the method on the object    jobject result = env->CallObjectMethod(jstr, messageMe);    // Get a C-style string    const char* str = env->GetStringUTFChars((jstring) result, NULL);    printf("%s\n", str);        // Clean up    env->ReleaseStringUTFChars(jstr, str);//    // Shutdown the VM.//    vm->DestroyJavaVM();    return env->NewStringUTF("Hello from JNI!");}