Implement notification callbacks on Android

* doc/lispref/os.texi (Desktop Notifications): Document that
:on-cancel, :on-action and :actions are now supported on
Android.

* java/org/gnu/emacs/EmacsActivity.java (onNewIntent): New
function.

* java/org/gnu/emacs/EmacsDesktopNotification.java
(NOTIFICATION_ACTION, NOTIFICATION_TAG, NOTIFICATION_DISMISSED):
New constants.  <actions, titles>: New fields.
(insertActions): New function.
(display1, display): Insert actions on Jelly Bean and up, and
arrange to be notified when the notification is dismissed.
(CancellationReceiver): New class.

* java/org/gnu/emacs/EmacsNative.java (sendNotificationDeleted)
(sendNotificationAction): New functions.

* src/android.c (sendDndDrag, sendDndUri, sendDndText): Correct
return types.
(sendNotificationDeleted, sendNotificationAction)
(android_exception_check_5, android_exception_check_6): New
functions.

* src/android.h:

* src/androidgui.h (struct android_notification_event): New
structure.
(union android_event): New member for notification events.

* src/androidselect.c (android_init_emacs_desktop_notification):
Update JNI signatures.
(android_notifications_notify_1, Fandroid_notifications_notify):
New arguments ACTIONS, ACTION_CB and CANCEL_CB.  Convert and
record them as appropriate.
(android_notification_deleted, android_notification_action): New
functions.
(syms_of_androidselect): Prepare a hash table of outstanding
notifications.
<QCactions, QCon_action, QCon_cancel> New defsyms.

* src/androidterm.c (handle_one_android_event)
<ANDROID_NOTIFICATION_DELETED>
<ANDROID_NOTIFICATION_ACTION>: Dispatch event contents to
androidselect.c for processing.

* src/androidterm.h:

* src/androidvfs.c (java_string_class): Export.

* src/keyboard.c (kbd_buffer_get_event) <NOTIFICATION_EVENT>:
Call callback specified by the event.

* src/termhooks.h (enum event_kind) [HAVE_ANDROID]: New
enum NOTIFICATION_EVENT.

1 files changed, 7 insertions, 0 deletions

diff --git a/src/android.h b/src/android.h
index e1834cebf68..ee634a3e76c 100644
--- a/src/android.h
+++ b/src/android.h
@@ -118,6 +118,10 @@ extern void android_exception_check_1 (jobject);
 extern void android_exception_check_2 (jobject, jobject);
 extern void android_exception_check_3 (jobject, jobject, jobject);
 extern void android_exception_check_4 (jobject, jobject, jobject, jobject);
+extern void android_exception_check_5 (jobject, jobject, jobject, jobject,
+                                       jobject);
+extern void android_exception_check_6 (jobject, jobject, jobject, jobject,
+                                       jobject, jobject);
 extern void android_exception_check_nonnull (void *, jobject);
 extern void android_exception_check_nonnull_1 (void *, jobject, jobject);
 
@@ -306,6 +310,9 @@ extern JNIEnv *android_java_env;
 extern JavaVM *android_jvm;
 #endif /* THREADS_ENABLED */
 
+/* The Java String class.  */
+extern jclass java_string_class;
+
 /* The EmacsService object.  */
 extern jobject emacs_service;