Centered typing in search field

Change-Id: Iae46722195d0d06ff88da52df4fa48ca7b157512

src/com/android/launcher3/allapps/AllAppsSearchBarController.java

@@ -39,7 +39,8 @@ import java.util.ArrayList;
  * An interface to a search box that AllApps can command.
  */
 public abstract class AllAppsSearchBarController
-        implements TextWatcher, OnEditorActionListener, ExtendedEditText.OnBackKeyListener {
+        implements TextWatcher, OnEditorActionListener, ExtendedEditText.OnBackKeyListener,
+        View.OnFocusChangeListener {
 
     protected Launcher mLauncher;
     protected AlphabeticalAppsList mApps;
@@ -49,6 +50,8 @@ public abstract class AllAppsSearchBarController
     protected DefaultAppSearchAlgorithm mSearchAlgorithm;
     protected InputMethodManager mInputMethodManager;
 
+    protected View mHintView;
+
     public void setVisibility(int visibility) {
         mInput.setVisibility(visibility);
     }
@@ -66,6 +69,7 @@ public abstract class AllAppsSearchBarController
         mInput.addTextChangedListener(this);
         mInput.setOnEditorActionListener(this);
         mInput.setOnBackKeyListener(this);
+        mInput.setOnFocusChangeListener(this);
 
         mInputMethodManager = (InputMethodManager)
                 mInput.getContext().getSystemService(Context.INPUT_METHOD_SERVICE);
@@ -126,6 +130,27 @@ public abstract class AllAppsSearchBarController
         return false;
     }
 
+    @Override
+    public void onFocusChange(View view, boolean focused) {
+        if (mHintView != null) {
+            mHintView.setVisibility(focused ? View.INVISIBLE : View.VISIBLE);
+        }
+    }
+
+    /**
+     * Sets a view to serve as the search field's hint.
+     */
+    public void setHintView(View hintView) {
+        mHintView = hintView;
+    }
+
+    /**
+     * Returns the search field's hint view.
+     */
+    public View getHintView() {
+        return mHintView;
+    }
+
     /**
      * Resets the search bar state.
      */