QPython3 problems with Javascript in HTML GUI

问题

QPython3, Android 6.0; I guess JS cann't instance var droid = new Android(); Any hints to solve the problem?

Python Code (the same in both cases!):

import android

droid=android.Android()

droid.webViewShow('file:///storage/emulated/0/qpython/scripts3/test10_le_HTMLGUI_01.html')

while True:
    result=droid.eventWaitFor('sag').result
    droid.ttsSpeak(result['data'])

HTML-Code: test10_le_HTMLGUI_01.html (Case 1):

<html>
  <head>
    <title>Text To Speech</title>
    <script>
      var n = prompt("Hello JavaScript","");
      var droid = new Android();
      var speak = function() { 
        var n = prompt("Hello JavaScript","");
        droid.eventPost("sag", document.getElementById("sag").value, 1);
      }
    </script>
  </head>
  <body>
    <form onsubmit="speak(); return false;">
      <label for="sag">What is your message?</label>
      <input type="text" id="sag" />
      <input type="submit" value="Speak" />
    </form>
  </body>
</html>

HTML-Code (Case 2):

<html>
  <head>
    <title>Text To Speech</title>
    <script>
      var droid = new Android();
      var n = prompt("Hello JavaScript","");
      var speak = function() { 
        var n = prompt("Hello JavaScript","");
        droid.eventPost("sag", document.getElementById("sag").value, 1);
      }
    </script>
  </head>
  <body>
    <form onsubmit="speak(); return false;">
      <label for="sag">What is your message?</label>
      <input type="text" id="sag" />
      <input type="submit" value="Speak" />
    </form>
  </body>
</html>

While in case 1 the prompt("Hello JavaScript",""); is executed it is not in case 2!

QPython3 (Android 6) SL4A eventPost() and eventWaitFor() works fine on the following example (for add. info refer to http://www.mithril.com.au/android/doc/):

import android, time
droid=android.Android()
t = 'Geschafft!'
print('debug 1')
droid.eventPost('Event1', t, 1)
print('debug 2')
print('debug 3')
result=droid.eventWaitFor('Event1').result
droid.ttsSpeak(result['data'])
print('debug 4')
print(result['data'])

Proof: If you comment out the line droid.eventPost('Event1', t, 1) then eventWaitFor() will block forever!

Maybe we 've a similar Problem in QPython3 webViewShow - Script doesn't receiving data and in https://stackoverflow.com/questions/36478310/qpython-webview-javascript-android-object

Regards Gustav (2017-03-21)

回答1:

Use bottle() instead of JavaScript. It's already integrated in QPython3 and provides solutions for pretty the same tasks. Find a tutorial for bottle() at https://bottlepy.org/docs/dev/bottle-docs.pdf

Regards Gustav

回答2:

I encountered same problem. As far as I found, at least in recent version you're required to add an Android interface when using webview by calling JavascriptAddInterface, and from the SL4A sources seems like it doesn't. Too bad...

来源：https://stackoverflow.com/questions/42928283/qpython3-problems-with-javascript-in-html-gui

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android

qpython3