introduction to sl4 a
DESCRIPTION
TRANSCRIPT
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INTRODUCTION TO SL4A
louieli [email protected]
September 4, 2012
louieli [email protected]
INTRODUCTION TO SL4A
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Outline. .Introduction
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Usage. . ... . .
Examples
1 Outline
2 IntroductionOverview of the SL4A
3 UsageInstallArchitectureusageSharing Scripts
4 Examplesdownloadhttpservertext to speech
louieli [email protected]
INTRODUCTION TO SL4A
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Outline. .Introduction
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Usage. . ... . .
Examples
Overview of the SL4A
Scripting Layer for Android (SL4A) brings scripting languages toAndroid by allowing you to edit and execute scripts and interactiveinterpreters directly on the Android device. These scripts haveaccess to many of the APIs available to full-fledged Androidapplications, but with a greatly simplified interface that makes iteasy to get things done.
louieli [email protected]
INTRODUCTION TO SL4A
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Outline. .Introduction
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Usage. . ... . .
Examples
Overview of the SL4A
louieli [email protected]
INTRODUCTION TO SL4A
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Outline. .Introduction
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Usage. . ... . .
Examples
Install
http://blog.csdn.net/louieuser/article/details/7912661http://blog.csdn.net/louieuser/article/details/7916280
louieli [email protected]
INTRODUCTION TO SL4A
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Outline. .Introduction
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Usage. . ... . .
Examples
Install
louieli [email protected]
INTRODUCTION TO SL4A
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Outline. .Introduction
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Usage. . ... . .
Examples
Install
louieli [email protected]
INTRODUCTION TO SL4A
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Outline. .Introduction
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Usage. . ... . .
Examples
Architecture
louieli [email protected]
INTRODUCTION TO SL4A
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Outline. .Introduction
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Usage. . ... . .
Examples
Architecture
louieli [email protected]
INTRODUCTION TO SL4A
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Outline. .Introduction
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Usage. . ... . .
Examples
Architecture
louieli [email protected]
INTRODUCTION TO SL4A
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Outline. .Introduction
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Usage. . ... . .
Examples
Architecture
All SL4A API calls return an object with three fields:
id: a strictly increasing, numeric id associated with the APIcall.
result: the return value of the API call, or null if there is noreturn value.
error: a description of any error that occurred or null if noerror occurred.
louieli [email protected]
INTRODUCTION TO SL4A
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Outline. .Introduction
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Usage. . ... . .
Examples
usage
Python
1 import android2
3 droid = android.Android()4 name = droid.getInput(”Hello!”, ”What is your name?”)5 print name # name is a namedtuple6 droid.makeToast(”Hello, %s” % name.result)
louieli [email protected]
INTRODUCTION TO SL4A
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Outline. .Introduction
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Usage. . ... . .
Examples
usage
Lua
1 require ”android”2
3 name = android.getInput(”Hello!”, ”What is your name?”)4 android.printDict(name)5 android.makeToast(”Hello, ” .. name.result)
louieli [email protected]
INTRODUCTION TO SL4A
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Usage. . ... . .
Examples
usage
Perl
1 use Android;2 my $a = Android−>new();3 $a−>makeToast(”Hello, Android!”);
louieli [email protected]
INTRODUCTION TO SL4A
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Outline. .Introduction
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Examples
usage
JavaScript
1 load(”/sdcard/ase/extras/rhino/android.js”);2 var droid = new Android();3 droid.makeToast(”Hello, Android!”);
louieli [email protected]
INTRODUCTION TO SL4A
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Examples
usage
JRuby
1 require ”android”2 droid = Android.new3 droid.makeToast ”Hello, Android!”
louieli [email protected]
INTRODUCTION TO SL4A
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Examples
usage
BeanShell
1 source(”/sdcard/ase/extras/bsh/android.bsh”);2 droid = Android();3 droid.call(”makeToast”, ”Hello, Android!”);
louieli [email protected]
INTRODUCTION TO SL4A
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Usage. . ... . .
Examples
usage
Tcl
1 package require android2 set android [android new]3 set name [$android getInput ”Hello!” ”What is your name?”]4 $android makeToast ”Hello, $name”
louieli [email protected]
INTRODUCTION TO SL4A
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Usage. . ... . .
Examples
usage
http://code.google.com/p/android-scripting/wiki/ApiReference
louieli [email protected]
INTRODUCTION TO SL4A
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Usage. . ... . .
Examples
usage
1 #!/usr/bin/env python2 #Launch app.py3 import subprocess4 ADB = r’d:\Android\android−sdk\platform−tools\adb.exe’5 APPLICATION = ’speakit.py’6 TARGET = ’/sdcard/sl4a/scripts/’7
8 def main():9 # Upload the application.
10 subprocess.call([ADB, ’−e’, ’push’, APPLICATION, TARGET + APPLICATION])11 # Launch the application.12 subprocess.call(’”%s” −e shell am start \13 −a com.googlecode.android scripting.action.LAUNCH BACKGROUND SCRIPT \14 −n com.googlecode.android scripting/.activity.ScriptingLayerServiceLauncher \15 −e com.googlecode.android scripting.extra.SCRIPT PATH \16 ”%s%s”’ % (ADB, TARGET, APPLICATION))17
18 if name == ’ main ’:19 main()
louieli [email protected]
INTRODUCTION TO SL4A
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Outline. .Introduction
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Usage. . ... . .
Examples
Sharing Scripts
QR Code
1 Open http://zxing.appspot.com/generator/
2 Open the Contents drop down and choose Text.
3 On the first line of the Text Content, enter the name of thescript.
4 Below that, paste the script content.
5 Open the Size drop down and choose L.
6 Click Generate.
7 Embed or share the resulting barcode image with your friends.
louieli [email protected]
INTRODUCTION TO SL4A
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Outline. .Introduction
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Usage. . ... . .
Examples
Sharing Scripts
QR Code
louieli [email protected]
INTRODUCTION TO SL4A
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Outline. .Introduction
. . .
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Usage. . ... . .
Examples
Sharing Scripts
QR Code
To download the script to your phone:
1 Launch SL4A or return the scripts list.
2 Press the Menu button.
3 Tap Add.
4 Tap Scan Barcode.
5 Scan the barcode and SL4A will add the script to your list.
A QR code can encode 4,296 characters of content. So, this isonly effective for small scripts.
louieli [email protected]
INTRODUCTION TO SL4A
. . . . . .
Outline. .Introduction
. . .
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Usage. . ... . .
Examples
Sharing Scripts
Scripts as APKs
https://code.google.com/p/android-scripting/wiki/SharingScripts#Scripts as APKs
louieli [email protected]
INTRODUCTION TO SL4A
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Outline. .Introduction
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Usage. . ... . .
Examples
download
1 def reporthook(numblocks,blocksize,filesize,url=None):2 base = os.path.basename(url)3 try:4 percent = min((numblocks ∗ blocksize ∗ 100) / filesize, 100)5 except:6 percent = 1007 if numblocks != 0:8 droid.dialogSetMaxProgress(filesize)9 droid.dialogSetCurrentProgress(numblocks ∗ blocksize)
louieli [email protected]
INTRODUCTION TO SL4A
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Outline. .Introduction
. . .
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Usage. . ... . .
Examples
download
1 def main():2 global droid3 droid = android.Android()4 url = ’http://code.jquery.com/jquery−1.8.1.js’5 if url is None: return6 dst = droid.dialogGetInput(’Filename’,’Save file as:’,7 os.path.basename(url)).result8 droid.dialogCreateHorizontalProgress(’Downloading...’,9 ’Saving %s from web.’ % dst)
10 droid.dialogShow()11 urllib.urlretrieve(url, downloads + dst,12 lambda nb, bs, fs, url=url: reporthook(nb,bs,fs,url))13 droid.dialogDismiss()14 droid.dialogCreateAlert(’Operation Finished’,15 ’%s has been saved to %s.’ % (url,downloads + dst))16 droid.dialogShow()
louieli [email protected]
INTRODUCTION TO SL4A
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Outline. .Introduction
. . .
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Usage. . ... . .
Examples
download
louieli [email protected]
INTRODUCTION TO SL4A
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Outline. .Introduction
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Usage. . ... . .
Examples
httpserver
1 import android, socket, SimpleHTTPServer, struct2 from os import chdir3
4 droid = android.Android()5
6 ipdec = droid.wifiGetConnectionInfo().result[’ip address’]7 ipstr = socket.inet ntoa(struct.pack(’L’,ipdec))8
9 chdir(’/sdcard/DCIM/’)10
11 print ”connect to %s” % ipstr12 SimpleHTTPServer.test()
louieli [email protected]
INTRODUCTION TO SL4A
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Outline. .Introduction
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Usage. . ... . .
Examples
text to speech
1 <html>2 <head>3 <title>Text to Speech</title>4 <script>5 var droid = new Android();6 var speak = function() {7 droid.eventPost(”say”, document.getElementById(”say”).value);8 }9 </script>
10 </head>11 <body>12 <form onsubmit=”speak(); return false;”>13 <label for=”say”>What would you like to say?</label>14 <input type=”text” id=”say” />15 <input type=”submit” value=”Speak” />16 </form>17 </body>18 </html>
louieli [email protected]
INTRODUCTION TO SL4A
. . . . . .
Outline. .Introduction
. . .
. . . .
. . . . . . . . .
. . . .
Usage. . ... . .
Examples
text to speech
1 import android2 droid = android.Android()3
4 droid.webViewShow(’file:///sdcard/sl4a/scripts/text to speech.html’)5 while True:6 result = droid.eventWaitFor(’say’).result7 droid.ttsSpeak(result[’data’])8 print result9 break
louieli [email protected]
INTRODUCTION TO SL4A
. . . . . .
Outline. .Introduction
. . .
. . . .
. . . . . . . . .
. . . .
Usage. . ... . .
Examples
text to speech
louieli [email protected]
INTRODUCTION TO SL4A