Android NDk环境配置

/*
 * Copyright (C) 2009 The Android Open Source Project
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *      http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 *
 */
#include <string.h>
#include <jni.h>

/* This is a trivial JNI example where we use a native method
 * to return a new VM String. See the corresponding Java source
 * file located at:
 *
 *   apps/samples/hello-jni/project/src/com/example/hellojni/HelloJni.java
 */
//jstring
//Java_com_bazhangkeji_MainActivity_stringFromJNI( JNIEnv* env,
//                                                  jobject thiz )
//{
//    return (*env)->NewStringUTF(env, "Hello from JNI !");
//}

JNIEXPORT jstring JNICALL
Java_com_xzh_ndkdemo_MainActivity_stringFromJNI(JNIEnv *env, jobject instance) {

//    return (*env)->NewStringUTF(env, returnValue);
    return (*env)->NewStringUTF(env, "Hello from JNI !");
}

# Copyright (C) 2009 The Android Open Source Project
#
# Licensed under the Apache License, Version 2.0 (the "License");
# you may not use this file except in compliance with the License.
# You may obtain a copy of the License at
#
#      http://www.apache.org/licenses/LICENSE-2.0
#
# Unless required by applicable law or agreed to in writing, software
# distributed under the License is distributed on an "AS IS" BASIS,
# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
# See the License for the specific language governing permissions and
# limitations under the License.
#
LOCAL_PATH := $(call my-dir)

include $(CLEAR_VARS)

LOCAL_MODULE    := hello_jni
LOCAL_SRC_FILES := hello_jni.c

include $(BUILD_SHARED_LIBRARY)

LOCAL_MODULE    := hello_jni
LOCAL_SRC_FILES := hello_jni.c

externalNativeBuild {
        ndkBuild {
            path file("src\\main\\jni\\Hello.mk")
        }
    }

public class MainActivity extends AppCompatActivity {

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);
        init();
    }

    private void init() {
        System.out.println("hello ndkdemo"+stringFromJNI());
    }
    public native String stringFromJNI();
    static {
        System.loadLibrary("hello_jni");
    }
}

ndk.dir=/Users/cinba/Library/android-ndk-r10e
sdk.dir=/Users/cinba/Library/android-sdk