diff --git a/PythonAndroid/application/app/src/main/assets/pythonforandroid.py b/PythonAndroid/application/app/src/main/assets/pythonforandroid.py
index 4a2f503..8a49626 100644
--- a/PythonAndroid/application/app/src/main/assets/pythonforandroid.py
+++ b/PythonAndroid/application/app/src/main/assets/pythonforandroid.py
@@ -1,2 +1,26 @@
+import youtube_dl
+
+class SimpleYDL(youtube_dl.YoutubeDL):
+    
+    def __init__(self, *args, **kargs):
+        super(SimpleYDL, self).__init__(*args, **kargs)
+        self.add_default_info_extractors()
+
+def get_stream(ytid):
+    ydl_opts = {
+        'nocheckcertificate': True,
+        'skip_download': True,
+        'cachedir': False,
+        'format': 18,
+        'prefer_insecure': True,
+    }
+    res = SimpleYDL(ydl_opts).extract_info(ytid, process=False, download=False)
+    data = {item['format_id']: item['url'] for item in res['formats']}
+    data['title'] = res['title']
+    data['info'] = res['description']
+    obj = {'duration':res['duration'] }
+    obj['stream'] = data['18']
+    return obj
+
 def add_func(a,b):
     return a+b
\ No newline at end of file
diff --git a/PythonAndroid/application/jni/Application.mk b/PythonAndroid/application/jni/Application.mk
index 02fa951..ee64638 100644
--- a/PythonAndroid/application/jni/Application.mk
+++ b/PythonAndroid/application/jni/Application.mk
@@ -1,2 +1,2 @@
 APP_ABI := armeabi-v7a 
-APP_PLATFORM := android-12
\ No newline at end of file
+APP_PLATFORM := android-23
\ No newline at end of file
diff --git a/PythonAndroid/application/jni/main.c b/PythonAndroid/application/jni/main.c
index 6ea5aa3..e2ff1b5 100644
--- a/PythonAndroid/application/jni/main.c
+++ b/PythonAndroid/application/jni/main.c
@@ -9,13 +9,13 @@ JNIEXPORT jint JNICALL Java_com_example_pythontest_MainActivity_add
   (JNIEnv *env, jclass js, jint arg0, jint arg1)
 {
     //set path and home,pay attention --> python3.5.zip
-	putenv("PYTHONPATH=/data/data/com.example.pythontest/files/python3.5.zip");
-	//putenv("PYTHONHOME=/data/data/com.example.pythontest/files");
+    putenv("PYTHONPATH=/data/data/com.example.pythontest/files/python3.5.zip");
+    //putenv("PYTHONHOME=/data/data/com.example.pythontest/files");
 
 
     Py_Initialize();
     if ( !Py_IsInitialized()){
-    	__android_log_print(ANDROID_LOG_INFO, "JNIEnv","Py_Initialize failed!!\n"); 
+        __android_log_print(ANDROID_LOG_INFO, "JNIEnv","Py_Initialize failed!!\n"); 
         return -1;
     }
 
@@ -24,35 +24,56 @@ JNIEXPORT jint JNICALL Java_com_example_pythontest_MainActivity_add
     //add current path to search pythonforandroid.py file
     PyRun_SimpleString("import sys");
     PyRun_SimpleString("sys.path.append('/data/data/com.example.pythontest/files')"); //this mean pythonforandroid.py under /data/data/com.example.pythontest/files
+    // PyRun_SimpleString("print('hello')"); //this mean pythonforandroid.py under /data/data/com.example.pythontest/files
 
     PyObject *pModule;
     PyObject *pFunction;
+    PyObject *ytFunction;
     PyObject *pArgs;
+    PyObject *ytArgs;
     PyObject *pRetValue;
+    PyObject *ytRetValue;
+    PyObject *streamLink;
 
     //import module which name pythonforandroid under /data/data/com.example.pythontest/files
     pModule = PyImport_ImportModule("pythonforandroid");
     if(!pModule){
-    	__android_log_print(ANDROID_LOG_INFO, "JNIEnv","import python failed!!\n"); 
+        __android_log_print(ANDROID_LOG_INFO, "JNIEnv","import python module failed!!\n"); 
         return -1;
     }
 
     //invoke python function add_func
     pFunction = PyObject_GetAttrString(pModule, "add_func");
     if(!pFunction){ 
-    	__android_log_print(ANDROID_LOG_INFO, "JNIEnv","get python function failed!!!\n"); 
-    	return -1;    }
+        __android_log_print(ANDROID_LOG_INFO, "JNIEnv","get python function failed!!!\n"); 
+        return -1;    
+    }
     pArgs = PyTuple_New(2);
     PyTuple_SetItem(pArgs, 0, Py_BuildValue("i", arg0));
     PyTuple_SetItem(pArgs, 1, Py_BuildValue("i", arg1));
     pRetValue = PyObject_CallObject(pFunction, pArgs);
 
-    __android_log_print(ANDROID_LOG_INFO, "JNIEnv","PyImport_ImportModule %ld",PyLong_AsLong(pRetValue)); 
+    __android_log_print(ANDROID_LOG_INFO, "JNIEnv","pRetValue %ld",PyLong_AsLong(pRetValue)); 
+
+    ytFunction = PyObject_GetAttrString(pModule, "get_stream");
+
+    if(!ytFunction){ 
+        __android_log_print(ANDROID_LOG_INFO, "JNIEnv","get yt function failed!!!\n"); 
+        return -1;    
+    }
+    ytArgs = PyTuple_New(1);
+    PyTuple_SetItem(ytArgs, 0, Py_BuildValue("s", "fRh_vgS2dFE"));
+    ytRetValue = PyObject_CallObject(ytFunction, ytArgs);
+    streamLink = PyDict_GetItemString(ytRetValue, "stream");
+    __android_log_print(ANDROID_LOG_INFO, "JNIEnv","pRetValue %s", PyUnicode_AsUTF8(streamLink)); 
 
     Py_DECREF(pModule);
     Py_DECREF(pFunction);
+    Py_DECREF(ytFunction);
     Py_DECREF(pArgs);
+    Py_DECREF(ytArgs);
     Py_DECREF(pRetValue);
+    Py_DECREF(ytRetValue);
     Py_Finalize();
     
     return PyLong_AsLong(pRetValue);