Use shouldOfferSwitchingToNextInputMethod when available

With this CL, LatinIME starts using
InputMethodManager#shouldOfferSwitchingToNextInputMethod when
available and API level is higher than 19 (KitKat).

Note that relevant settings of LatinIME will be ignored if
InputMethodManager#shouldOfferSwitchingToNextInputMethod is
considered to be available at the moment. We will revisit
here to reorganize the user visible settings before the
new global IME switching mechanism becomes publicly
available.

BUG: 12965588
Change-Id: I0188fa56cba8e983c61cef3ae3400a0e3821f718

1 files changed, 12 insertions, 0 deletions

diff --git a/java/src/com/android/inputmethod/latin/RichInputMethodManager.java b/java/src/com/android/inputmethod/latin/RichInputMethodManager.java
index 630a03670..2b0be545e 100644
--- a/java/src/com/android/inputmethod/latin/RichInputMethodManager.java
+++ b/java/src/com/android/inputmethod/latin/RichInputMethodManager.java
@@ -20,6 +20,7 @@ import static com.android.inputmethod.latin.Constants.Subtype.KEYBOARD_MODE;
 
 import android.content.Context;
 import android.content.SharedPreferences;
+import android.os.Build;
 import android.os.IBinder;
 import android.preference.PreferenceManager;
 import android.util.Log;
@@ -406,4 +407,15 @@ public final class RichInputMethodManager {
         mSubtypeListCacheWithoutImplicitlySelectedSubtypes.clear();
         mInputMethodInfoCache.clear();
     }
+
+    public boolean shouldOfferSwitchingToNextInputMethod(final IBinder binder,
+            boolean defaultValue) {
+        // Use the default value instead on Jelly Bean MR2 and previous where
+        // {@link InputMethodManager#shouldOfferSwitchingToNextInputMethod} isn't yet available
+        // and on KitKat where the API is still just a stub to return true always.
+        if (Build.VERSION.SDK_INT <= Build.VERSION_CODES.KITKAT) {
+            return defaultValue;
+        }
+        return mImmWrapper.shouldOfferSwitchingToNextInputMethod(binder);
+    }
 }