remove ViewHelper, use ViewCompat instead (#23280)

Summary:
ViewHelper has only setBackground method which works identical to ViewCompat.setBackground from Android Support Library. This PR removes ViewHelper, and uses ViewCompat instead.

[Android] [Changed] - remove ViewHelper, use ViewCompat instead
Pull Request resolved: https://github.com/facebook/react-native/pull/23280

Differential Revision: D13950510

Pulled By: mdvacca

fbshipit-source-id: 10b5122affac17d4b66fb995339c6715c0871ed0

ReactAndroid/src/main/java/com/facebook/react/views/common/ViewHelper.java

@@ -1,31 +0,0 @@
-// Copyright (c) Facebook, Inc. and its affiliates.
-
-// This source code is licensed under the MIT license found in the
-// LICENSE file in the root directory of this source tree.
-
-package com.facebook.react.views.common;
-
-import android.graphics.drawable.Drawable;
-import android.os.Build;
-import android.view.View;
-
-/** Helper class for Views */
-public class ViewHelper {
-
-  /**
-   * Set the background to a given Drawable, or remove the background. It calls {@link
-   * View#setBackground(Drawable)} or {@link View#setBackgroundDrawable(Drawable)} based on the sdk
-   * version.
-   *
-   * @param view {@link View} to apply the background.
-   * @param drawable {@link Drawable} The Drawable to use as the background, or null to remove the
-   *     background
-   */
-  public static void setBackground(View view, Drawable drawable) {
-    if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.JELLY_BEAN) {
-      view.setBackground(drawable);
-    } else {
-      view.setBackgroundDrawable(drawable);
-    }
-  }
-}

ReactAndroid/src/main/java/com/facebook/react/views/view/BUCK

@@ -6,6 +6,9 @@ rn_android_library(
     visibility = [
         "PUBLIC",
     ],
+    provided_deps = [
+        react_native_dep("third-party/android/support/v4:lib-support-v4"),
+    ],
     deps = [
         YOGA_TARGET,
         react_native_dep("libraries/fbcore/src/main/java/com/facebook/common/logging:logging"),

ReactAndroid/src/main/java/com/facebook/react/views/view/ReactViewBackgroundManager.java

@@ -8,8 +8,8 @@ package com.facebook.react.views.view;
 import android.graphics.Color;
 import android.graphics.drawable.Drawable;
 import android.graphics.drawable.LayerDrawable;
+import android.support.v4.view.ViewCompat;
 import android.view.View;
-import com.facebook.react.views.common.ViewHelper;
 import javax.annotation.Nullable;
 
 /** Class that manages the background for views and borders. */
@@ -26,15 +26,15 @@ public class ReactViewBackgroundManager {
     if (mReactBackgroundDrawable == null) {
       mReactBackgroundDrawable = new ReactViewBackgroundDrawable(mView.getContext());
       Drawable backgroundDrawable = mView.getBackground();
-      ViewHelper.setBackground(
+      ViewCompat.setBackground(
           mView, null); // required so that drawable callback is cleared before we add the
       // drawable back as a part of LayerDrawable
       if (backgroundDrawable == null) {
-        ViewHelper.setBackground(mView, mReactBackgroundDrawable);
+        ViewCompat.setBackground(mView, mReactBackgroundDrawable);
       } else {
         LayerDrawable layerDrawable =
             new LayerDrawable(new Drawable[] {mReactBackgroundDrawable, backgroundDrawable});
-        ViewHelper.setBackground(mView, layerDrawable);
+        ViewCompat.setBackground(mView, layerDrawable);
       }
     }
     return mReactBackgroundDrawable;