I am trying to automate my Android app using Appium & client is Python.After launch app & allow permissions, i am not able to click any element present on Login screen?

def test_signup(self):
self.driver.find_element_by_id(“com.android.packageinstaller:id/permission_allow_button”).click()
self.driver.find_element_by_id(“com.android.packageinstaller:id/permission_allow_button”).click()
desired_caps[‘appActivity’] = ‘.activities.LoginActivity’
try:
time.sleep(10)
signupButton = self.driver.find_element_by_id(“com.clearfly.groupfone:id/edtEmail”)
self.assertTrue(signupButton.is_displayed())
signupButton.click()

    finally:

        print"signup button not found"