1 files changed, 84 insertions, 0 deletions
diff --git a/com/android/media/update/ApiHelper.java b/com/android/media/update/ApiHelper.java
new file mode 100644
index 00000000..b0ca1bdd
--- /dev/null
+++ b/com/android/media/update/ApiHelper.java
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+/*
+ * Copyright 2018 The Android Open Source Project
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package com.android.media.update;
+
+import android.content.Context;
+import android.content.res.Resources;
+import android.content.res.Resources.Theme;
+import android.content.res.XmlResourceParser;
+import android.util.AttributeSet;
+import android.view.ContextThemeWrapper;
+import android.view.LayoutInflater;
+import android.view.View;
+
+import com.android.support.mediarouter.app.MediaRouteButton;
+
+public class ApiHelper {
+    private static ApiHelper sInstance;
+    private final Resources mLibResources;
+    private final Theme mLibTheme;
+
+    public static ApiHelper getInstance() {
+        return sInstance;
+    }
+
+    static void initialize(Resources libResources, Theme libTheme) {
+        if (sInstance == null) {
+            sInstance = new ApiHelper(libResources, libTheme);
+        }
+    }
+
+    private ApiHelper(Resources libResources, Theme libTheme) {
+        mLibResources = libResources;
+        mLibTheme = libTheme;
+    }
+
+    public static Resources getLibResources() {
+        return sInstance.mLibResources;
+    }
+
+    public static Resources.Theme getLibTheme() {
+        return sInstance.mLibTheme;
+    }
+
+    public static LayoutInflater getLayoutInflater(Context context) {
+        LayoutInflater layoutInflater = LayoutInflater.from(context).cloneInContext(
+                new ContextThemeWrapper(context, getLibTheme()));
+        layoutInflater.setFactory2(new LayoutInflater.Factory2() {
+            @Override
+            public View onCreateView(
+                    View parent, String name, Context context, AttributeSet attrs) {
+                if (MediaRouteButton.class.getCanonicalName().equals(name)) {
+                    return new MediaRouteButton(context, attrs);
+                }
+                return null;
+            }
+
+            @Override
+            public View onCreateView(String name, Context context, AttributeSet attrs) {
+                return onCreateView(null, name, context, attrs);
+            }
+        });
+        return layoutInflater;
+    }
+
+    public static View inflateLibLayout(Context context, int libResId) {
+        try (XmlResourceParser parser = getLibResources().getLayout(libResId)) {
+            return getLayoutInflater(context).inflate(parser, null);
+        }
+    }
+}