Click sound on android
lazarus / 43-Android

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polypress · 2015-11-16 13:47

I need a click sound when buttons are pressed. I currently use
vibrate, but this is heavy on the battery, and have looked at
minesadorada's playsound package
but it creates no sound, although no errors. I see it is for Windows
and Linux. Can it be adapted to be used with android on smart phones?

Alternatively, can the activity.java file be adapted to use the
SoundPool facility, with access from lazarus? Again, I have tried this
route but cannot get it to work.

Regards

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felipemdc · 2015-11-17 14:39

Which kind of architecture are you using to make your app? There are
various Lazarus Android support ways.

I guess changing activity.java would be the easiest path. Create a JNI
function on it and call it from Pascal on button click is 1 idea.

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polypress · 2015-11-18 08:06

Hi Felipemdc. Thank you for your reply.
The architecture is laz4android (lazarus 1.1 FPC 2,7.1) on windows 7
to produce apk for android phone (android 4.1.2).
I'll have to see about writing JNI functions. I don't think I've done
that before. I'll search for examples.

Regards

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ykot · 2015-11-18 17:04

I don't know if it might be an overkill, but on Android, you can also
use BASS. You need to load it dynamically though, to make sure it is
loaded after main shared library.

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polypress · 2015-11-23 17:07

.Quote from: felipemdc on November 17, 2015, 03:39:08 pmWhich kind of
architecture are you using to make your app? There are various Lazarus
Android support ways.

I guess changing activity.java would be the easiest path. Create a JNI
function on it and call it from Pascal on button click is 1 idea.

The examples I've seen of processing new functions between java and
lazarus seem to define new functions for java by coding in lazarus.

What I am trying to do is to define new functions for lazarus by
coding in java, because the required lazarus functions (eg playsound)
don't seem to work using laz4android.

Can you point me in the right direction?

Regards

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felipemdc · 2015-11-24 21:03

I've never used laz4android, but here is a JNI example:

https://sourceforge.net/p/lazarus-ccr/svn/HEAD/tree/bindings/android-
ndk/examples/jnitest/src/com/pascal/jnitest/

https://sourceforge.net/p/lazarus-ccr/svn/HEAD/tree/bindings/android-
ndk/examples/jnitest/jni/

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polypress · 2015-11-28 12:26

Thank you Felipe
Quote from: felipemdc on November 24, 2015, 10:03:41 pmI've never used
laz4android, but here is a JNI example:

https://sourceforge.net/p/lazarus-ccr/svn/HEAD/tree/bindings/android-
ndk/examples/jnitest/src/com/pascal/jnitest/

https://sourceforge.net/p/lazarus-ccr/svn/HEAD/tree/bindings/android-
ndk/examples/jnitest/jni/
As far as I can tell these links refer to producing code for java from
lazarus code. I am trying to go the other way - produce code for
lazarus from java code. This is because I can find no lazarus code to
produce sound for android, whereas I have some simple java code which
produces code for sound, but I cannot access it from lazarus.
Another example is Hide/ShowVirtualKeyboard which is defined in
activity.java and should be accessible by lazarus via
customdrawnlclintf_android.inc but this fails.
Has anyone found a way to access procedures from activity.java for use
in lazarus?

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polypress · 2015-11-29 13:06

Success. You just borrow code from customdrawnint.pas,
customdrawnobject_android.inc and customdrawnlclintf_android.inc
without modifying them.