Hide ime switch icon when there are only one IME and no enabled subtypes

Change-Id: I4684d852cc61db125538e1255fd99fa55d60d593

1 files changed, 12 insertions, 1 deletions

diff --git a/packages/SystemUI/src/com/android/systemui/statusbar/tablet/InputMethodButton.java b/packages/SystemUI/src/com/android/systemui/statusbar/tablet/InputMethodButton.java
index 66ed727..aa431bc 100644
--- a/packages/SystemUI/src/com/android/systemui/statusbar/tablet/InputMethodButton.java
+++ b/packages/SystemUI/src/com/android/systemui/statusbar/tablet/InputMethodButton.java
@@ -157,6 +157,17 @@ public class InputMethodButton extends ImageView {
         return null;
     }
 
+    // Display IME switcher icon only when all of the followings are true:
+    // * There is only one enabled IME on the device.  (Note that the IME should be the system IME)
+    // * There are no explicitly enabled (by the user) subtypes of the IME, or the IME doesn't have
+    // its subtypes at all
+    private boolean needsToShowIMEButton() {
+        List<InputMethodInfo> imis = mImm.getInputMethodList();
+        final int size = imis.size();
+        return size > 1
+                || (size == 1 && mImm.getEnabledInputMethodSubtypeList(imis.get(0)).size() > 1);
+    }
+
     private void refreshStatusIcon(boolean keyboardShown) {
         if (!keyboardShown) {
             setVisibility(View.INVISIBLE);
@@ -187,7 +198,7 @@ public class InputMethodButton extends ImageView {
 
     public void setIMEButtonVisible(IBinder token, boolean visible) {
         mToken = token;
-        mKeyboardShown = visible;
+        mKeyboardShown = visible ? needsToShowIMEButton() : false;
         refreshStatusIcon(mKeyboardShown);
     }
 }