android 调用 python

文章可以帮你解决android下调用python方法获取返回值,往python函数中传参等。。。

我这里使用AS,如果使用ec开发的直接看 http://www.srplab.com/cn/index.html 官方下载的开发包 里面有demo,我下载了可以跑通;

不管是不是AS和ec,开始还是去看下CLE官网的开发包吧,下载下来看看,ec的有例子,可以编译过;
http://www.srplab.com/cn/index.html

开发包下载: http://www.srplab.com/cn/files/products.html

你可能会遇到的问题

1:注意so版本;版本都要一致,从开发包里复制粘贴;
2:注意so引入路径;as和ec是有区别的;


有什么问题大家可以一起讨论,之前找了很多资料,只有这个最后成功了,但是开始也有很多问题,还有通过JNI的 , 但是引入python.h 和python libs有问题VC上可以,在AS这个开发工具上怎么搞不知道,,现在这种移植也还行,简单,比较方便;之前还看了SL4A那个 也太扯淡了 ; jython在jvm环境下编译没毛病,一个jar搞定,但是如果在android下编译,那就不能用了,dvm和jvm确实不一样的;;;还是第一次直观的表现出来;还有一些其它的,太难懂,就不一一说了;


如下图:

libs的和jniLibs里面的so;
android 调用 python_第1张图片

assets中放.py的文件和python的zip包;

我的add.py文件的代码

import time

def get_time():
    return time.time();

print("sin sin sin sin sin")

def add_num(a,b):  // 相加
    return a+b

def get_array(a): // 外边传入一个数组
    return a[0]  

def get_Str():  // 返回字符串
    return "sin niu bi"

里面import time 这里会爆红,需要把 time.cpython-34m.so放到assets下面可以执行get_time()这个函数;

下面是代码;

public class MainActivity extends Activity {

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

    public native String stringFromJNI();


    public StarSrvGroupClass SrvGroup;

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

        TextView tv1 = (TextView) findViewById(R.id.sample_text1);
        TextView tv2 = (TextView) findViewById(R.id.sample_text2);
        TextView tv3 = (TextView) findViewById(R.id.sample_text3);
        TextView tv4 = (TextView) findViewById(R.id.sample_text4);
        TextView tv5 = (TextView) findViewById(R.id.sample_text5);
//        tv.setText(stringFromJNI());

        // // TODO: 2018/5/4

        File destDir = new File("/data/data/" + getPackageName() + "/files");
        if (!destDir.exists())
            destDir.mkdirs();
        java.io.File python_libFile = new java.io.File("/data/data/" + getPackageName() + "/files/python3.4.zip");
        if (!python_libFile.exists()) {
            try {
                copyFile(this, "python3.4.zip", null);
            } catch (Exception e) {
                System.out.println("cccccccc///  " + e);
            }
        }

        try {
            copyFile(this, "add.py", "");
        } catch (Exception e) {
            System.out.println("aaaaaaaaa///  " + e);
        }


        try {
//            copyFile(this, "_struct.cpython-34m.so", null);
//            copyFile(this, "binascii.cpython-34m.so", null);
            copyFile(this, "time.cpython-34m.so", null);
            copyFile(this, "zlib.cpython-34m.so", null);  //     这里zlib需要加上,不知道具体用法,不加会报zlib引入错误;估计是so里面有使用;
        } catch (Exception e) {
            System.out.println("DDDDDD/// " + e);
        }

        try {
            //--load python34 core library first;

            System.load(this.getApplicationInfo().nativeLibraryDir + "/libpython3.4m.so");
            Log.e("aaaaa", "aaaaaaaaaaaaa-->" + this.getApplicationInfo().nativeLibraryDir + "/libpython3.4m.so");
        } catch (UnsatisfiedLinkError ex) {
            Log.e("aaaaa", "bbbbbbbbbbbbbbb");
            System.out.println("bbbbbbbbbb///   " + ex.toString());
            Log.e("ssssss", "qweqweqwe-->" + this.getApplicationInfo().nativeLibraryDir + "/libpython3.4m.so");
        }

        /*----init starcore----*/
        StarCoreFactoryPath.StarCoreCoreLibraryPath = this.getApplicationInfo().nativeLibraryDir;
        StarCoreFactoryPath.StarCoreShareLibraryPath = this.getApplicationInfo().nativeLibraryDir;
        StarCoreFactoryPath.StarCoreOperationPath = "/data/data/" + getPackageName() + "/files";

        StarCoreFactory starcore = StarCoreFactory.GetFactory();
        StarServiceClass Service = starcore._InitSimple("test", "123", 0, 0);
        SrvGroup = (StarSrvGroupClass) Service._Get("_ServiceGroup");
        Service._CheckPassword(false);

        /*----run python code----*/
        SrvGroup._InitRaw("python34", Service);
        StarObjectClass python = Service._ImportRawContext("python", "", false, "");
        python._Call("import", "sys");

        StarObjectClass pythonSys = python._GetObject("sys");
        StarObjectClass pythonPath = (StarObjectClass) pythonSys._Get("path");
        pythonPath._Call("insert", 0, "/data/data/" + getPackageName() + "/files/python3.4.zip");
        pythonPath._Call("insert", 0, this.getApplicationInfo().nativeLibraryDir);
        pythonPath._Call("insert", 0, "/data/data/" + getPackageName() + "/files");


        //
        String CorePath = "/data/data/" + getPackageName() + "/files";
        Service._DoFile("python", CorePath + "/add.py", "");
        int _Callint = python._Callint("add_num", 5, 8);
        Log.e("ssssss", "_Callint: " + _Callint);


        Object add_num1 = python._Call("add_num", 1, 6);
        int a = (int) add_num1;
        Log.e("aaa", a + "");

        tv1.setText("python中计算5+8:   " + _Callint + "");
        tv2.setText("python中计算1+6:   " + a + "");


        short[] arrS = {456, 254, 693};  //get_array
        Object get_array = python._Call("get_array", arrS);
        String s = get_array.toString();
//        short[] aaa = (short[]) get_array;
        Log.e("ccc", "aaa.len: " + s);

        Object get_str = python._Call("get_Str");
        Log.e("dddd", "get_str: " + (String) get_str);

        tv3.setText("往python中传递一个数组 {456, 254, 693},python中获取第一个值并返回:   " + s + "");
        tv4.setText("python返回一个字符串:   " + (String) get_str + "");


        Object get_time = python._Call("get_time");
        Log.e("tttt","get_time: "+get_time);

    }


    private void copyFile(Activity c, String Name, String desPath) throws IOException {
        File outfile = null;
        if (desPath != null)
            outfile = new File("/data/data/" + getPackageName() + "/files/" + desPath + Name);
        else
            outfile = new File("/data/data/" + getPackageName() + "/files/" + Name);
        //if (!outfile.exists()) {
        outfile.createNewFile();
        FileOutputStream out = new FileOutputStream(outfile);
        byte[] buffer = new byte[1024];
        InputStream in;
        int readLen = 0;
        if (desPath != null)
            in = c.getAssets().open(desPath + Name);
        else
            in = c.getAssets().open(Name);
        while ((readLen = in.read(buffer)) != -1) {
            out.write(buffer, 0, readLen);
        }
        out.flush();
        in.close();
        out.close();
        //}
    }


}

好了,大功告成,总之现在是可以调用了,还不知道在复杂的python代码下能不能经得起考验 ,反正目前这样看着是没有问题的;有问题及时讨论。。。
另外,刚开始网上找解决办法看的这篇文章: https://blog.csdn.net/yingshukun/article/details/78571992
这里面也有其他方式调用python,有兴趣也可以看看;
此处谢谢大佬分享。


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