我是NDK的新手，所以在构建下面的项目时遇到了一个错误：

Error:Execution failed for task ':app:transformNativeLibsWithStripDebugSymbolForDebug'.
java.io.IOException: Failed to delete E:\startUpCode\OpenCvDemo\NDKTest\app\build\intermediates\transforms\stripDebugSymbol\debug\folders\2000\1f\main\lib\mips

这是我的C++代码：

#include <com_nickworld_ndktest_NativeClass.h>

JNIEXPORT jstring JNICALL Java_com_nickworld_ndktest_NativeClass_getMessageFromJNI
    (JNIEnv *env, jclass obj){
return env->NewStringUTF("This is the message from JNI");

文件 android.mk

LOCAL_PATH := $(call my-dir)

include $(CLEAR_VARS)

LOCAL_SRC_FILES := com_nickworld_ndktest_NativeClass.cpp

LOCAL_LDLIBS += -llog
LOCAL_MODULE := MyLib

include $(BUILD_SHARED_LIBRARY)

文件 Application.mk

APP_STL := gnustl_static
APP_CPPFLAGS := -frtti -fexceptions
APP_ABI := armeabi-v7a
APP_PLATFORM := android-16

文件 MainActivity.java

public class MainActivity extends AppCompatActivity {

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

    @Override
    protected void onCreate(Bundle savedInstanceState) {

        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);

        ((TextView) findViewById(R.id.txtView)).setText(NativeClass.getMessageFromJNI());
    }
}

如何修复此错误？我哪里做错了？