#点击放大镜
driver.find_element_by_id("com.android.settings:id/search").click()
#在输入框输入WLAN
driver.find_element_by_id("android:id/search_src_text").send_keys("WLAN")
sleep(2)
#清空输入框
driver.find_element_by_id("android:id/search_src_text").clear()
desired_caps['unicodekeyboard'] = True
desired_caps['resetkeyboard'] = True