1 files changed, 45 insertions, 0 deletions
diff --git a/prebuilts/gradle/DarkTheme/Application/src/main/java/com/example/android/darktheme/ColorUtils.java b/prebuilts/gradle/DarkTheme/Application/src/main/java/com/example/android/darktheme/ColorUtils.java
new file mode 100644
index 00000000..f831ab0b
--- /dev/null
+++ b/prebuilts/gradle/DarkTheme/Application/src/main/java/com/example/android/darktheme/ColorUtils.java
@@ -0,0 +1,45 @@
+/*
+ * Copyright (C) 2019 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
+ *
+ *      https://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.example.android.darktheme;
+
+import android.content.Context;
+import android.content.res.TypedArray;
+import android.graphics.Color;
+
+import androidx.annotation.AttrRes;
+import androidx.annotation.ColorInt;
+import androidx.annotation.NonNull;
+
+public class ColorUtils {
+
+    /**
+     * Queries the theme of the given {@code context} for a theme color.
+     *
+     * @param context   the context holding the current theme.
+     * @param attrResId the theme color attribute to resolve.
+     * @return the theme color
+     */
+    @ColorInt
+    public static int getThemeColor(@NonNull Context context, @AttrRes int attrResId) {
+        TypedArray a = context.obtainStyledAttributes(null, new int[]{attrResId});
+        try {
+            return a.getColor(0, Color.MAGENTA);
+        } finally {
+            a.recycle();
+        }
+    }
+}