Allow MSIME to set inactive when window loses focus.

MSIME doesn't work when existing InputConnection is restored. The fix is
to allow MSIME to activate connection when window gains focus and set
inactive when window loses focus. This mimics single session IME.

Bug: 128751901
Test: Manually tested using steps in bug.
Change-Id: I22cef6c1dacb0ca402840da94a2bf02b989da447

1 files changed, 11 insertions, 0 deletions

diff --git a/core/java/android/inputmethodservice/MultiClientInputMethodServiceDelegate.java b/core/java/android/inputmethodservice/MultiClientInputMethodServiceDelegate.java
index 0604f6a69d00..4b02085726f1 100644
--- a/core/java/android/inputmethodservice/MultiClientInputMethodServiceDelegate.java
+++ b/core/java/android/inputmethodservice/MultiClientInputMethodServiceDelegate.java
@@ -374,4 +374,15 @@ public final class MultiClientInputMethodServiceDelegate {
     public boolean isUidAllowedOnDisplay(int displayId, int uid) {
         return mImpl.isUidAllowedOnDisplay(displayId, uid);
     }
+
+    /**
+     * Can be called by MSIME to activate/deactivate a client when it is gaining/losing focus
+     * respectively.
+     *
+     * @param clientId client ID to activate/deactivate.
+     * @param active {@code true} to activate a client.
+     */
+    public void setActive(int clientId, boolean active) {
+        mImpl.setActive(clientId, active);
+    }
 }