From 6c04339c5aadb5118b0e0a8178b3d569956bbad7 Mon Sep 17 00:00:00 2001
From: Seigo Nonaka <nona@google.com>
Date: Mon, 7 Dec 2015 19:03:50 -0800
Subject: [PATCH] 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
---
 .../src/com/android/inputmethod/latin/LatinIME.java | 13 +++++++++++++
 1 file changed, 13 insertions(+)

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;
@@ -967,6 +968,12 @@ public class LatinIME extends InputMethodService implements KeyboardActionListen
         if (TRACE) Debug.startMethodTracing("/data/trace/latinime");
     }
 
+    @Override
+    public void onWindowShown() {
+        super.onWindowShown();
+        setNavigationBarVisibility(isInputViewShown());
+    }
+
     @Override
     public void onWindowHidden() {
         super.onWindowHidden();
@@ -974,6 +981,7 @@ public class LatinIME extends InputMethodService implements KeyboardActionListen
         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);
+    }
 }