Load KeyCodeDescriptionMapper class lazily

Change-Id: I2cba2bb5b2f449ed29895365b9c6ca285a7640fe

java/src/com/android/inputmethod/accessibility/AccessibilityUtils.java

@@ -67,7 +67,6 @@ public final class AccessibilityUtils {
 
         // These only need to be initialized if the kill switch is off.
         sInstance.initInternal(context);
-        KeyCodeDescriptionMapper.init();
     }
 
     public static AccessibilityUtils getInstance() {

java/src/com/android/inputmethod/accessibility/KeyCodeDescriptionMapper.java

@@ -31,7 +31,7 @@ import com.android.inputmethod.latin.R;
 
 import java.util.Locale;
 
-public final class KeyCodeDescriptionMapper {
+final class KeyCodeDescriptionMapper {
     private static final String TAG = KeyCodeDescriptionMapper.class.getSimpleName();
     private static final String SPOKEN_LETTER_RESOURCE_NAME_FORMAT = "spoken_accented_letter_%04X";
     private static final String SPOKEN_SYMBOL_RESOURCE_NAME_FORMAT = "spoken_symbol_%04X";
@@ -40,24 +40,16 @@ public final class KeyCodeDescriptionMapper {
     // The resource ID of the string spoken for obscured keys
     private static final int OBSCURED_KEY_RES_ID = R.string.spoken_description_dot;
 
-    private static KeyCodeDescriptionMapper sInstance = new KeyCodeDescriptionMapper();
-
-    // Sparse array of spoken description resource IDs indexed by key codes
-    private final SparseIntArray mKeyCodeMap;
-
-    public static void init() {
-        sInstance.initInternal();
-    }
+    private static final KeyCodeDescriptionMapper sInstance = new KeyCodeDescriptionMapper();
 
     public static KeyCodeDescriptionMapper getInstance() {
         return sInstance;
     }
 
-    private KeyCodeDescriptionMapper() {
-        mKeyCodeMap = new SparseIntArray();
-    }
+    // Sparse array of spoken description resource IDs indexed by key codes
+    private final SparseIntArray mKeyCodeMap = new SparseIntArray();
 
-    private void initInternal() {
+    private KeyCodeDescriptionMapper() {
         // Special non-character codes defined in Keyboard
         mKeyCodeMap.put(Constants.CODE_SPACE, R.string.spoken_description_space);
         mKeyCodeMap.put(Constants.CODE_DELETE, R.string.spoken_description_delete);

java/src/com/android/inputmethod/accessibility/KeyboardAccessibilityNodeProvider.java

@@ -47,7 +47,7 @@ import java.util.List;
  * virtual views, thus conveying their logical structure.
  * </p>
  */
-public final class KeyboardAccessibilityNodeProvider extends AccessibilityNodeProviderCompat {
+final class KeyboardAccessibilityNodeProvider extends AccessibilityNodeProviderCompat {
     private static final String TAG = KeyboardAccessibilityNodeProvider.class.getSimpleName();
     private static final int UNDEFINED = Integer.MIN_VALUE;
 

java/src/com/android/inputmethod/keyboard/MainKeyboardView.java

@@ -381,14 +381,12 @@ public final class MainKeyboardView extends KeyboardView implements PointerTrack
         final int keyHeight = keyboard.mMostCommonKeyHeight - keyboard.mVerticalGap;
         mLanguageOnSpacebarTextSize = keyHeight * mLanguageOnSpacebarTextRatio;
 
-        final MainKeyboardAccessibilityDelegate accessibilityDelegate;
         if (AccessibilityUtils.getInstance().isAccessibilityEnabled()) {
-            accessibilityDelegate = new MainKeyboardAccessibilityDelegate(this, mKeyDetector);
-            accessibilityDelegate.setKeyboard(keyboard);
+            mAccessibilityDelegate = new MainKeyboardAccessibilityDelegate(this, mKeyDetector);
+            mAccessibilityDelegate.setKeyboard(keyboard);
         } else {
-            accessibilityDelegate = null;
+            mAccessibilityDelegate = null;
         }
-        mAccessibilityDelegate = accessibilityDelegate;
     }
 
     /**