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user interaction

You were to create a small Android app that interacts with your user twice. The first dialog asks
the user to confirm the web address and port to use for the web server. Assuming your user taps
the OK button on your dialog, a second dialog pops up to request the timing value to send to the
server. As with the first dialog, tapping the OK button continues execution by sending the newly
acquired timing value to the web server. Tapping Cancel at any time causes your app to exit.
Some of the code was provided for you. Your job was to complete the program by writing the
code you think you need under this code and call your program get2inputsapp.py.

import android
from urllib import urlencode
from urllib2 import urlopen

server_title = 'Which server should I use?’
server_msg = "Please confirm the server address/name to use for your athlete's timing data:"
timing_title = 'Enter data'
timing_msg = 'Provide a new timing value:'
web_server = 'http://192.168.1.33:8080'
add_time_cgi = '/cgi-bin/add_timing_data.py'

app = android.Android()

def send_to_server(url, post_data=None):
The first dialog asks your
if post_data:
user to confirm the web
page = urlopen(url, urlencode(post_data))
address and port to use.
else:
page = urlopen(url)
return(page.read().decode("utf8"))
resp = app.dialogGetInput(server_title, server_msg, web_server).result

If your user did NOT tap
if resp is not None: on the Cancel button… …the second dialog asks for

web_server = resp a new timing value.
resp = app.dialogGetInput(timing_title, timing_msg).result

if resp is not None: Again, if your user did NOT

new_time = resp tap on the Cancel button… …the app sends the
data to the web server.
send_to_server(web_server + add_time_cgi, {‘TimingValue’: new_time})

306 Chapter 9