Re: Kawa on Android - problems with setting text properties using "text:"

[Per Bothner <per at bothner dot com>]

Sorry I didn't answer this before.

On 03/09/2011 07:57 AM, Benny Tsai wrote:
> However, I could use some help with an issue.  When compiling (using
> "ant debug") the following "Hello World" code (as described here:
> http://per.bothner.com/blog/2010/AndroidHelloScheme/):
>
> (require 'android-defs)
> (activity hello
>    (on-create-view
>     (android.widget.TextView (this)
>      text:
>      "Hello, Android from Kawa Scheme!")))
>
> ... the compilation fails with the following error:
>
> [java] c:\Android\KawaHello\src\kawa\android\hello.scm:6:5: type
> constant-string is incompatible with required type int
>
> Line 6 is where I pass in the "Hello..." string to "text:".  I've read
> that "text:" directs the compiler to look for "setText" and "addText"
> methods.  Looking at the TextView API, I see that there are multiple
> setText() methods, the first of which is setText(int resid).  Is the
> compiler matching on that, and therefore expecting an int arg instead
> of a String arg to "text:"?

The compiler tried to find the best match, using an approximation of
the Java algorithm.  In this case, it selects:
  android.widget.TextView.setText(java.lang.CharSequence)void

> This is extra puzzling to me because I've read Peter Feigl's recent
> messages about Kawa on Android, and his test activity code appears to
> use "text:" with Strings with no problems.

Likewise ...

> Here are some information on my environment.  Please let me know if
> any additional info is needed.
>
> Windows XP (SP3)
> Sun JDK 1.6.0_24
> Ant 1.8.2
> Kawa 1.11, source from SVN trunk, revision 6919, compiled with "ant
> -Denable-android=true"
> Android SDK Tools, revision 10
> Android SDK Platform-tools, revision 3
> SDK Platform Android 2.2, API 8, revision 2 (also tried targeting
> Android 2.3.3, API 10, revision 1, same problem occurs)

I'm testing on Fedora GNU/Linux, using Java 1.6.0_24-b07,
SVN sources compiled with  ant -Denable-android=true,
ANDROID_PLATFORM=android-8, Android SDK Tools Revision 6
Project Target: Android 2.2.
--
	--Per Bothner
per@bothner.com   http://per.bothner.com/