Jni中执行ndk-build，编译第三方静态库(.a)和动态库(.so)的Android.mk文件写法

Jni中执行ndk-build，编译第三方静态库(.a)和动态库(.so)的Android.mk文件写法

Android Studio编译JNI接口，当需要调用第三方静态库或者动态库时，正确配置Android.mk文件（jni文件夹中）中是生成自己库的关键，下面是ndk-build执行所需的Android.mk文件文件内容，可做为一个例子，其中Add与Sub做为两个动态库引入，Mul与Div做为两个静态库引入。（注：执行ndk-build之前把Add.so、Sub.so、Mul.a、Div.a拷贝到jni文件夹下）

# Copyright (C) 2017 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)# load shared libraryinclude $(CLEAR_VARS)LOCAL_MODULE    := AddLOCAL_SRC_FILES := libAdd.soinclude $(PREBUILT_SHARED_LIBRARY)include $(CLEAR_VARS)LOCAL_MODULE    := SubLOCAL_SRC_FILES := libSub.soinclude $(PREBUILT_SHARED_LIBRARY)# load static libraryinclude $(CLEAR_VARS)LOCAL_MODULE    := MulLOCAL_SRC_FILES := libMul.ainclude $(PREBUILT_STATIC_LIBRARY)include $(CLEAR_VARS)LOCAL_MODULE    := DivLOCAL_SRC_FILES := libDiv.ainclude $(PREBUILT_STATIC_LIBRARY)include $(CLEAR_VARS)LOCAL_MODULE    := JniFunctionLOCAL_SRC_FILES := JniFunction.cLOCAL_SHARED_LIBRARIES := Add SubLOCAL_STATIC_LIBRARIES := Mul Divinclude $(BUILD_SHARED_LIBRARY)

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