Change NavigationBar invisible if the input view is not shown.

The opaque navigation bar guard view does not make much sense when the
IME does not show software keyboard at all.  LatinIME does not show
any UI when the hardware keyboard is connected.

With Iea77915ecc55eedaf19899e72c44f704ba9d852c, input method can change
the navigation bar visibility.  This CL changes navigation bar invisible
when the hardware keyboard is connected.

Bug:22564251
Change-Id: I14d9490e00caa852035a05830e76114cbe6af8f2

1 files changed, 13 insertions, 0 deletions

diff --git a/java/src/com/android/inputmethod/latin/LatinIME.java b/java/src/com/android/inputmethod/latin/LatinIME.java
index 25a5de250..f3cf6cde2 100644
--- a/java/src/com/android/inputmethod/latin/LatinIME.java
+++ b/java/src/com/android/inputmethod/latin/LatinIME.java
@@ -30,6 +30,7 @@ import android.content.Intent;
 import android.content.IntentFilter;
 import android.content.res.Configuration;
 import android.content.res.Resources;
+import android.graphics.Color;
 import android.inputmethodservice.InputMethodService;
 import android.media.AudioManager;
 import android.os.Debug;
@@ -968,12 +969,19 @@ public class LatinIME extends InputMethodService implements KeyboardActionListen
     }
 
     @Override
+    public void onWindowShown() {
+        super.onWindowShown();
+        setNavigationBarVisibility(isInputViewShown());
+    }
+
+    @Override
     public void onWindowHidden() {
         super.onWindowHidden();
         final MainKeyboardView mainKeyboardView = mKeyboardSwitcher.getMainKeyboardView();
         if (mainKeyboardView != null) {
             mainKeyboardView.closing();
         }
+        setNavigationBarVisibility(false);
     }
 
     void onFinishInputInternal() {
@@ -1865,4 +1873,9 @@ public class LatinIME extends InputMethodService implements KeyboardActionListen
         }
         return mRichImm.shouldOfferSwitchingToNextInputMethod(token, fallbackValue);
     }
+
+    private void setNavigationBarVisibility(final boolean visible) {
+        // Color.BLACK is ignored and default IME navigation bar color is used.
+        getWindow().getWindow().setNavigationBarColor(visible ? Color.BLACK : Color.TRANSPARENT);
+    }
 }