1/*
2 * Copyright (C) 2015 The Android Open Source Project
3 *
4 * Licensed under the Apache License, Version 2.0 (the "License");
5 * you may not use this file except in compliance with the License.
6 * You may obtain a copy of the License at
7 *
8 *      http://www.apache.org/licenses/LICENSE-2.0
9 *
10 * Unless required by applicable law or agreed to in writing, software
11 * distributed under the License is distributed on an "AS IS" BASIS,
12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
13 * See the License for the specific language governing permissions and
14 * limitations under the License.
15 */
16
17package android.support.design.widget;
18
19import android.content.Context;
20import android.content.res.TypedArray;
21
22class ThemeUtils {
23
24    private static final int[] APPCOMPAT_CHECK_ATTRS = {
25            android.support.v7.appcompat.R.attr.colorPrimary
26    };
27
28    static void checkAppCompatTheme(Context context) {
29        TypedArray a = context.obtainStyledAttributes(APPCOMPAT_CHECK_ATTRS);
30        final boolean failed = !a.hasValue(0);
31        a.recycle();
32        if (failed) {
33            throw new IllegalArgumentException("You need to use a Theme.AppCompat theme "
34                    + "(or descendant) with the design library.");
35        }
36    }
37}
38