Thanks for your kind support!!! I fixed the problem.
I have more questions.
1. is it possible to convert y-coordinate from top-to-bottom to bottom-to-top?
I tried it as below.
al_scale_transform(&t, 1.f, -1.f);
al_translate_transform(&t, 0, (float)al_get_display_height(display));
it makes everything reversed.^^
I'd like to change coordinate only. image and drawing should be drawn in the normal way.
2. isn't "video" supported in Android release?
3. I tried to play audio (the attached) using al_load_audio_stream().
even though I set play mode to once, it is not stopped, playing again and again.
it doesn't give any event also.
stream = al_load_audio_stream(filename.c_str(), 4, 2048);
playing other files is OK. I guess that it's too short.
i tried to convert mp3 to wav. it is also fine to play.