Merge "When KEYCODE_BACK is received, hide keyboard" into sc-dev

src/com/android/launcher3/ExtendedEditText.java

@@ -70,6 +70,9 @@ public class ExtendedEditText extends EditText {
     public boolean onKeyPreIme(int keyCode, KeyEvent event) {
         // If this is a back key, propagate the key back to the listener
         if (keyCode == KeyEvent.KEYCODE_BACK && event.getAction() == KeyEvent.ACTION_UP) {
+            if (TextUtils.isEmpty(getText())) {
+                hideKeyboard();
+            }
             if (mBackKeyListener != null) {
                 return mBackKeyListener.onBackKey();
             }