android 呼叫 python
阿新 • • 發佈:2019-01-07
文章可以幫你解決android下呼叫python方法獲取返回值,往python函式中傳參等。。。
你可能會遇到的問題
1:注意so版本;版本都要一致,從開發包裡複製貼上;
2:注意so引入路徑;as和ec是有區別的;
有什麼問題大家可以一起討論,之前找了很多資料,只有這個最後成功了,但是開始也有很多問題,還有通過JNI的 , 但是引入python.h 和python libs有問題VC上可以,在AS這個開發工具上怎麼搞不知道,,現在這種移植也還行,簡單,比較方便;之前還看了SL4A那個 也太扯淡了 ; jython在jvm環境下編譯沒毛病,一個jar搞定,但是如果在android下編譯,那就不能用了,dvm和jvm確實不一樣的;;;還是第一次直觀的表現出來;還有一些其它的,太難懂,就不一一說了;
如下圖:
libs的和jniLibs裡面的so;
assets中放.py的檔案和python的zip包;
我的add.py檔案的程式碼
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): // 外邊傳入一個數組
return a[0]
def get_Str(): // 返回字串
return "sin niu bi"
裡面import time 這裡會爆紅,需要把 time.cpython-34m.so放到assets下面可以執行get_time()這個函式;
下面是程式碼;
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); // 這裡zlib需要加上,不知道具體用法,不加會報zlib引入錯誤;估計是so裡面有使用;
} 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中計算5+8: " + _Callint + "");
tv2.setText("python中計算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中傳遞一個數組 {456, 254, 693},python中獲取第一個值並返回: " + s + "");
tv4.setText("python返回一個字串: " + (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,總之現在是可以呼叫了,還不知道在複雜的python程式碼下能不能經得起考驗 ,反正目前這樣看著是沒有問題的;有問題及時討論。。。
另外,剛開始網上找解決辦法看的這篇文章: https://blog.csdn.net/yingshukun/article/details/78571992
這裡面也有其他方式呼叫python,有興趣也可以看看;
此處謝謝大佬分享。