Android, Android Module Wizard: printing from jni to POS (or receipt)
printer?
lazarus / 43-Android

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osvaldotcf · 2015-02-22 20:42

How can i print to a POS Printer (or receipt Printer) from an App made
with Android Module Wizard ?

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felipemdc · 2015-02-23 00:20

I don't use the Android Module Wizard .... does anyone know how it
works exactly? It uses LCL-CustomDrawn-Android?

If yes, then you need to write jni code for printing, follow these
steps:
1> Find the Android APIs for printing and example code to do that
(search stackoverflow)
2> Use JNI to call the APIs, read and study this example in the wiki:
http://wiki.lazarus.freepascal.org/Android_Programming#Example_1:_Crea
ting_a_Java_object_and_calling_a_Java_method

If you are lucky and the printing API can be used without creating
subclasses, it should be streight forward from the link above. If not,
then you need to write a new method in Java and call  that method from
Pascal.

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Leledumbo · 2015-02-23 05:45

Quote from: felipemdc on February 23, 2015, 01:20:57 amI don't use the
Android Module Wizard .... does anyone know how it works exactly? It
uses LCL-CustomDrawn-Android?
No, it even has its own jni header translation. It uses native android
UI instead of LCL, wrapped as components to be used in Lazarus form
designer.