android studio导入so文件，并调用其中的方法

       在单位的项目中，需要一个算法来计算一个特殊值，可是相关的部门却不给计算公式，只是给了几个封装好的so文件和一个.h文件，让传入几个值，然后得到相应的值。拷。。。。。没法子，人家不给，我们只好调用这个了。

       这里在导入so文件和调用其中的方法时，遇到很多坑，这里做一个记录，以备以后查询。

       我使用的as1.5版本，一直没有升级呢。所以这里的所有方法，都是针对这个版本来的。

       第一步，我们将相关的so文件，复制到libs文件里。

                       这里，相关部门给出了所有应该有的文件夹的.so文件，如下图

                      

                       这里要注意一点，如果你加完之后，找不到.so文件，你看一下你有没有armeabi-v7a文件夹，在此文件夹里，一定要有so文件，不然在有些版本中就会出现错误。

       第二步，修改，我们app下面的build.gradle文件，添加如下代码

                      

   task nativeLibsToJar(type: Zip, description: "create a jar archive of the native libs") {
        destinationDir file("$projectDir/libs")
        baseName "Native_Libs2"
        extension "jar"
        from fileTree(dir: "libs", include: "**/*.so")
        into "lib"
    }

    tasks.withType(JavaCompile) {
        compileTask -> compileTask.dependsOn(nativeLibsToJar)
    }

                    这段代码，是与buildTypes同级的，如下图

                   

           第三步，建立相应的包与类文件

                          这里我们要根据给的.h文件来建立相应的包,文件名是这个com_romaway_stocklib_StockIndex.h那么，我们就要建立一个com.romaway.stocklib包，然后在此包中，建立StockIndex.class文件。建好后，如下图

                         

                         
          第四步，根据给出的.h文件，我们根据里面的方法，编写相应的方法，我的文件里，是这样的，只有一个方法，带了10多个数组。

                         下面是我的.h文件，我们

/* DO NOT EDIT THIS FILE - it is machine generated */
#include <jni.h>
/* Header for class com_romaway_stocklib_StockIndex */

#ifndef _Included_com_romaway_stocklib_StockIndex
#define _Included_com_romaway_stocklib_StockIndex
#ifdef __cplusplus
extern "C" {
#endif
/*
 * Class:     com_romaway_stocklib_StockIndex
 * Method:    CalcZiWuLine
 * Signature: ([D[D[D[D[D[D[D[D[D[D[D[D[D[D[D[D[D)I
 *这里注意，看到_CalcZiWuLine了吗，这个就是你要编写的方法名了
 */
 JNIEXPORT jint JNICALL Java_com_romaway_stocklib_StockIndex_CalcZiWuLine
  (JNIEnv *, jclass, jdoubleArray, jdoubleArray, jdoubleArray, jdoubleArray, jdoubleArray, jdoubleArray, jdoubleArray, jdoubleArray, jdoubleArray, jdoubleArray, jdoubleArray, jdoubleArray, jdoubleArray, jdoubleArray, jdoubleArray, jdoubleArray, jdoubleArray);

#ifdef __cplusplus
}
#endif
#endif

                    StockIndex.class文件如下

                

public class StockIndex {


    public static native void CalcZiWuLine(double[] list_open,double[] list_close,double[] list_high,double[] list_low,

                                           double[] list1,double[] list2,double[] list3,double[] list4,double[] list5,
                                           double[] list6,double[] list7,double[] list8,double[] list9,double[] list10,
                                           double[] list11,double[] list12,double[] list13);
}

           OK，当你写完之后，你会发现这页有提示有错，这里呢，我们先不去管它，一会做统一处理。

          第五步，在你想要的地方进行调用这个方法

        

package com.example.cg.sofileopera;

import android.support.v7.app.AppCompatActivity;
import android.os.Bundle;
import android.view.View;
import android.widget.Button;
import android.widget.TextView;

import com.romaway.stocklib.StockIndex;

public class MainActivity extends AppCompatActivity implements View.OnClickListener {

    static
    {
        System.loadLibrary("StockIndex");  //引入包名
    }


    private Button btn_view;
    private TextView txt_1;
    private TextView txt_2;
    private TextView txt_3;
    private TextView txt_4;
    private TextView txt_5;
    private TextView txt_6;
    private TextView txt_7;
    private TextView txt_8;
    private TextView txt_9;
    private TextView txt_10;
    private TextView txt_11;
    private TextView txt_12;
    private TextView txt_13;

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

        initControls();
    }

    /**
     * 初始化控件
     */
    private void initControls() {
        btn_view = (Button)findViewById(R.id.btn_view);
        btn_view.setOnClickListener(this);

        txt_1 = (TextView)findViewById(R.id.txt_1);
        txt_2 = (TextView)findViewById(R.id.txt_2);
        txt_3 = (TextView)findViewById(R.id.txt_3);
        txt_4 = (TextView)findViewById(R.id.txt_4);
        txt_5 = (TextView)findViewById(R.id.txt_5);
        txt_6 = (TextView)findViewById(R.id.txt_6);
        txt_7 = (TextView)findViewById(R.id.txt_7);
        txt_8 = (TextView)findViewById(R.id.txt_8);
        txt_9 = (TextView)findViewById(R.id.txt_9);
        txt_10 = (TextView)findViewById(R.id.txt_10);
        txt_11 = (TextView)findViewById(R.id.txt_11);
        txt_12 = (TextView)findViewById(R.id.txt_12);
        txt_13 = (TextView)findViewById(R.id.txt_13);
    }

    @Override
    public void onClick(View view) {
        switch (view.getId())
        {
            case R.id.btn_view:
                tempData();
                break;
        }
    }


    private void tempData() {

        double[] arrOpen = new double[5];
        double[] arrClose = new double[5];
        double[] arrHigh = new double[5];
        double[] arrLow = new double[5];



        double[] arr1 = new double[5];
        double[] arr2 = new double[5];
        double[] arr3 = new double[5];
        double[] arr4 = new double[5];
        double[] arr5 = new double[5];
        double[] arr6 = new double[5];
        double[] arr7 = new double[5];
        double[] arr8 = new double[5];
        double[] arr9 = new double[5];
        double[] arr10 = new double[5];
        double[] arr11 = new double[5];
        double[] arr12 = new double[5];
        double[] arr13 = new double[5];

        arrOpen[0] = 19.69;
        arrOpen[1] = 25.99;
        arrOpen[2] = 28.59;
        arrOpen[3] = 28.59;
        arrOpen[4] = 34.6;

        arrClose[0] = 23.63;
        arrClose[1] = 25.99;
        arrClose[2] = 28.59;
        arrClose[3] = 31.45;
        arrClose[4] = 34.6;

        arrHigh[0] = 23.63;
        arrHigh[1] = 25.99;
        arrHigh[2] = 28.59;
        arrHigh[3] = 31.45;
        arrHigh[4] = 34.6;

        arrLow[0] = 19.69;
        arrLow[1] = 25.99;
        arrLow[2] = 28.59;
        arrLow[3] = 31.45;
        arrLow[4] = 34.6;

        new StockIndex().CalcZiWuLine(arrOpen, arrClose, arrHigh, arrLow, arr1, arr2, arr3, arr4, arr5, arr6, arr7, arr8, arr9, arr10,
                arr11, arr12, arr13);

        String str1= "";
        String str2= "";
        String str3= "";
        String str4= "";
        String str5= "";
        String str6= "";
        String str7= "";
        String str8= "";
        String str9= "";
        String str10= "";
        String str11= "";
        String str12= "";
        String str13= "";

        for(int i=0;i<5;i++)
        {
            str1 += arr1[i] + ",";
            str2 += arr2[i] + ",";
            str3 += arr3[i] + ",";
            str4 += arr4[i] + ",";
            str5 += arr5[i] + ",";
            str6 += arr6[i] + ",";
            str7 += arr7[i] + ",";
            str8 += arr8[i] + ",";
            str9 += arr9[i] + ",";
            str10 += arr10[i] + ",";
            str11 += arr11[i] + ",";
            str12 += arr12[i] + ",";
            str13 += arr13[i] + ",";
        }

        txt_1.setText(str1);
        txt_2.setText(str2);
        txt_3.setText(str3);
        txt_4.setText(str4);
        txt_5.setText(str5);
        txt_6.setText(str6);
        txt_7.setText(str7);
        txt_8.setText(str8);
        txt_9.setText(str9);
        txt_10.setText(str10);
        txt_11.setText(str11);
        txt_12.setText(str12);
        txt_13.setText(str13);
    }
}

        代码完成，现在编译，运行，报错。没事，这里只要设置一下。File--->Settings--->Plugins，将Android NDK Support后面的对勾去掉如下图

      

     
     再运行，一切正常，得到了我想要的值