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Fix task-switching failures on Android 2.3

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* java/org/gnu/emacs/EmacsWindowManager.java (registerWindow):
Don't specify F_A_MULTIPLE_TASK on Android 4.4 and earlier.
This commit is contained in:
Po Lu 2024-04-13 11:28:23 +08:00
parent e8adb8cf5a
commit 4fc3771078
1 changed files with 9 additions and 3 deletions
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12
java/org/gnu/emacs/EmacsWindowManager.java
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@ -176,14 +176,20 @@ public final class EmacsWindowManager
intent = new Intent (EmacsService.SERVICE,
EmacsMultitaskActivity.class);
intent.addFlags (Intent.FLAG_ACTIVITY_NEW_TASK
| Intent.FLAG_ACTIVITY_MULTIPLE_TASK);
/* FLAG_ACTIVITY_MULTIPLE_TASK would appear appropriate, but that
is not so: on Android 2.3 and earlier, this flag combined with
FLAG_ACTIVITY_NEW_TASK prompts the task switcher to create a
new instance of EmacsMultitaskActivity, rather than return to
an existing instance, and is entirely redundant, inasmuch as
only one multitasking task can exist at any given moment. */
intent.addFlags (Intent.FLAG_ACTIVITY_NEW_TASK);
/* Intent.FLAG_ACTIVITY_NEW_DOCUMENT is lamentably unavailable on
older systems than Lolipop. */
if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.LOLLIPOP)
{
intent.addFlags (Intent.FLAG_ACTIVITY_NEW_DOCUMENT);
intent.addFlags (Intent.FLAG_ACTIVITY_NEW_DOCUMENT
| Intent.FLAG_ACTIVITY_MULTIPLE_TASK);
/* Bind this window to the activity in advance, i.e., before its
creation, so that its ID will be recorded in the RecentTasks