0

i am following the following tutorial http://taylorpeer.com/hello-world-cpp-android-ndk/

when i run ndk-build in the terminal. i get following errors

Compile++ thumb  : hello-jni <= hello-jni.cpp
jni/hello-jni.cpp:4:5: error: stray '\342' in program
jni/hello-jni.cpp:4:5: error: stray '\200' in program
jni/hello-jni.cpp:4:5: error: stray '\234' in program
jni/hello-jni.cpp:4:5: error: stray '\342' in program
jni/hello-jni.cpp:4:5: error: stray '\200' in program
jni/hello-jni.cpp:4:5: error: stray '\235' in program
jni/hello-jni.cpp:9:17: error: stray '\342' in program
jni/hello-jni.cpp:9:17: error: stray '\200' in program
jni/hello-jni.cpp:9:17: error: stray '\234' in program
jni/hello-jni.cpp:9:17: error: stray '\342' in program
jni/hello-jni.cpp:9:17: error: stray '\200' in program
jni/hello-jni.cpp:9:17: error: stray '\235' in program
jni/hello-jni.cpp:4:15: error: 'C' does not name a type
make: *** [obj/local/armeabi/objs/hello-jni/hello-jni.o] Error 1

following is the list of my files

java file found in src folder

.

package com.example;
import android.app.Activity;
import android.os.Bundle;
import android.widget.TextView;

    public class Hellojnicpp extends Activity {
          /** Called when the activity is first created. */
          @Override
          public void onCreate(Bundle savedInstanceState) {
                super.onCreate(savedInstanceState);
                /** Create a TextView and set it to display
                * text loaded from a native method.
                */
                TextView tv = new TextView(this);
                tv.setText(stringFromJNI());
                setContentView(tv);
          }
          /** A native method that is implemented by the
          * ‘hello-jni’ native library, which is packaged
          * with this application.
          */
          public native String stringFromJNI();
          /** Load the native library where the native method
          * is stored.
          */
          static {
                System.loadLibrary("hello-jni");
          }
    }

Android.mk file

LOCAL_PATH := $(call my-dir)


include $(CLEAR_VARS)
LOCAL_LDLIBS    := -llog

LOCAL_MODULE := hello-jni
LOCAL_SRC_FILES := hello-jni.cpp

include $(BUILD_SHARED_LIBRARY)

.cpp file

#include <string.h>
 #include <jni.h>

    extern “C” {
          JNIEXPORT jstring JNICALL
          Java_com_example_Hellojnicpp_stringFromJNI
          (JNIEnv *env, jobject obj)
          {
                return env->NewStringUTF(“Hello from C++ over JNI!”);
          }
    }

please help me in fixing the errors already searching the net from past 72 hrs thanks in advances

now getting the following error after changing "C" to "C"

Compile++ thumb  : hello-jni <= hello-jni.cpp
jni/hello-jni.cpp:9:17: error: stray '\342' in program
jni/hello-jni.cpp:9:17: error: stray '\200' in program
jni/hello-jni.cpp:9:17: error: stray '\234' in program
jni/hello-jni.cpp:9:17: error: stray '\342' in program
jni/hello-jni.cpp:9:17: error: stray '\200' in program
jni/hello-jni.cpp:9:17: error: stray '\235' in program
jni/hello-jni.cpp: In function '_jstring* Java_com_example_Hellojnicpp_stringFromJNI(JNIEnv*, jobject)':
jni/hello-jni.cpp:9:45: error: 'Hello' was not declared in this scope
make: *** [obj/local/armeabi/objs/hello-jni/hello-jni.o] Error 1
4

2 回答 2

2

检查你的 ””：

#include <string.h>
 #include <jni.h>

    extern "C" {
          JNIEXPORT jstring JNICALL
          Java_com_example_Hellojnicpp_stringFromJNI
          (JNIEnv *env, jobject obj)
          {
                return env->NewStringUTF("Hello from C++ over JNI!");
          }
    }
于 2013-07-30T13:24:44.157 回答
1 
extern “C”

应该

extern "C"

即，没有“卷曲”引号。确保您的文本编辑器不会为您“美化”您的直引号。

于 2013-07-30T12:50:42.087 回答