1 files changed, 52 insertions, 0 deletions
diff --git a/src/com/android/launcher3/util/Themes.java b/src/com/android/launcher3/util/Themes.java
new file mode 100644
index 000000000..acd589e20
--- /dev/null
+++ b/src/com/android/launcher3/util/Themes.java
@@ -0,0 +1,52 @@
+/*
+ * Copyright (C) 2017 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.launcher3.util;
+
+import android.content.Context;
+import android.content.res.TypedArray;
+import android.view.ContextThemeWrapper;
+
+/**
+ * Various utility methods associated with theming.
+ */
+public class Themes {
+
+    public static int getColorAccent(Context context) {
+        return getAttrColor(context, android.R.attr.colorAccent);
+    }
+
+    public static int getColorPrimary(Context context, int theme) {
+        return getAttrColor(new ContextThemeWrapper(context, theme), android.R.attr.colorPrimary);
+    }
+
+    public static int getAttrColor(Context context, int attr) {
+        TypedArray ta = context.obtainStyledAttributes(new int[]{attr});
+        int colorAccent = ta.getColor(0, 0);
+        ta.recycle();
+        return colorAccent;
+    }
+
+    /**
+     * Returns the alpha corresponding to the theme attribute {@param attr}, in the range [0, 255].
+     */
+    public static int getAlpha(Context context, int attr) {
+        TypedArray ta = context.obtainStyledAttributes(new int[]{attr});
+        float alpha = ta.getFloat(0, 0);
+        ta.recycle();
+        return (int) (255 * alpha + 0.5f);
+    }
+}