Android Studio3.0开发JNI流程------在Android原程序添加自己类的native多个so的方法

创建一个关联C/C++的Android程序，创建流程http://blog.youkuaiyun.com/cloverjf/article/details/78652245

源程序是调用C++代码来改变TextView的文本内容。

博主删除了在这之前的办法，因为不好用。
感谢@螃蟹变异了 大佬提供的多个so库同时运行的解决办法。下面博主给出解决方案，再次感谢@螃蟹变异了。

以下只提供代码，应该很容易懂…
MainActivity.java文件代码：

public class MainActivity extends AppCompatActivity {

    // Used to load the 'native-lib' library on application startup.
    static {
        System.loadLibrary("native-lib");
    }
    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);

        // Example of a call to a native method
        TextView tv = (TextView) findViewById(R.id.sample_text);
        tv.setText(stringFromJNI());

        // 在 MainActivity类中调用MyTest类的native方法
        TextView tv1 = (TextView) findViewById(R.id.sample_text1);  //
        tv1.setText(new MyTest().stringFromJNI1());   // "Hello from C++  ===  native-test-lib库";

    }

    /**
     * A native method that is implemented by the 'native-lib' native library,
     * which is packaged with this application.
     */
    public native String stringFromJNI();   // 在app\src\main\cpp\native-lib.cpp
}

MyTest.java类：

public class MyTest {

    static {
        System.loadLibrary("native-test-lib");
    }

    public native String stringFromJNI1();  // 在app\src\main\cpp\main.cpp
}

在app\src\main\cpp目录下创建两个.app文件：
native-lib.cpp文件内容：

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

extern "C"
JNIEXPORT jstring

JNICALL
Java_wvs_mm_tencent_com_testapplication_MainActivity_stringFromJNI(
        JNIEnv *env,
        jobject /* this */) {
    std::string hello = "Hello from C++  === 来自native-lib库";
    return env->NewStringUTF(hello.c_str());
}

main.cpp文件内容：

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

extern "C"
JNIEXPORT jstring

JNICALL
Java_wvs_mm_tencent_com_testapplication_MyTest_stringFromJNI1(
        JNIEnv *env,
        jobject /* this */) {
    std::string hello = "Hello from C++  ===  来自native-test-lib库";
    return env->NewStringUTF(hello.c_str());
}

主要的处理不同so的实在配置文件中：

# For more information about using CMake with Android Studio, read the
# documentation: https://d.android.com/studio/projects/add-native-code.html

# Sets the minimum version of CMake required to build the native library.

cmake_minimum_required(VERSION 3.4.1)

# Creates and names a library, sets it as either STATIC
# or SHARED, and provides the relative paths to its source code.
# You can define multiple libraries, and CMake builds them for you.
# Gradle automatically packages shared libraries with your APK.

add_library( # Sets the name of the library.
             native-lib

             # Sets the library as a shared library.
             SHARED

             # Provides a relative path to your source file(s).
             src/main/cpp/native-lib.cpp )

add_library( # Sets the name of the library.

            native-test-lib

            # Sets the library as a shared library.
            SHARED

            # Provides a relative path to your source file(s).

            src/main/cpp/main.cpp )




# Searches for a specified prebuilt library and stores the path as a
# variable. Because CMake includes system libraries in the search path by
# default, you only need to specify the name of the public NDK library
# you want to add. CMake verifies that the library exists before
# completing its build.

find_library( # Sets the name of the path variable.
              log-lib

              # Specifies the name of the NDK library that
              # you want CMake to locate.
              log )

# Specifies libraries CMake should link to your target library. You
# can link multiple libraries, such as libraries you define in this
# build script, prebuilt third-party libraries, or system libraries.

target_link_libraries( # Specifies the target library.
                       native-lib

                       # Links the target library to the log library
                       # included in the NDK.
                       ${log-lib} )

主要是使用两个add_library来添加不同的库。

运行结果：

在此，再次感谢@螃蟹变异了，好了，留下代码，赠人玫瑰，手留余香……

程序源代码：http://download.youkuaiyun.com/download/cloverjf/10262095

下一章：研究怎么在Android程序中添加JNI开发流程。