I tried,
def call_App(self):
if platform() == 'android':
PythonActivity = autoclass('org.renpy.android.PythonActivity') # request the Kivy activity instance
Intent = autoclass('android.content.Intent') # get the Android Intend class
intent = Intent()
intent.setComponent(new ComponentName('com.navikey', 'com.navikey.seven_ways'))
currentActivity = cast('android.app.Activity', PythonActivity.mActivity)
currentActivity.startActivity(intent)
and kv file root.call_App(), not working...