Fix reporting of key events containing SYM and META

* doc/emacs/android.texi (Android)::(What is Android?):
(Android Startup, Android File System, Android Environment)
(Android Windowing, Android Fonts, Android Troubleshooting):
Improve section titles.
(Android Windowing): Describe the relation between keyboard
modifiers reported by Android and those in key events.
* java/org/gnu/emacs/EmacsWindow.java (onKeyDown, onKeyUp):
Clear META_SYM_ON and META_META_MASK when retrieving ASCII
characters.
* src/androidgui.h: Add ANDROID_META_MASK.
* src/androidterm.c (android_android_to_emacs_modifiers)
(android_emacs_to_android_modifiers): Transform META to Alt, and
vice versa.

1 files changed, 1 insertions, 0 deletions

diff --git a/src/androidgui.h b/src/androidgui.h
index 265ec29b678..14225f7bf80 100644
--- a/src/androidgui.h
+++ b/src/androidgui.h
@@ -263,6 +263,7 @@ enum android_modifier_mask
     ANDROID_CONTROL_MASK = 4096,
     ANDROID_ALT_MASK     = 2,
     ANDROID_SUPER_MASK   = 4,
+    ANDROID_META_MASK    = 65536,
   };
 
 struct android_key_event