/*
 * Copyright (C) 2016 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 android.support.v4.os;

import android.os.Build.VERSION;

/**
 * BuildCompat contains additional platform version checking methods for
 * testing compatibility with new features.
 */
public class BuildCompat {
    private BuildCompat() {
    }

    /**
     * Check if the device is running on the Android N release or newer.
     * This method is suitable for use with preview SDKs and associated
     * prerelease device builds.
     *
     * @return true if N APIs are available for use
     */
    public static boolean isAtLeastN() {
        return "N".equals(VERSION.CODENAME);
    }
}

/*
 * Copyright (C) 2016 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 android.support.v4.os;

import android.os.Build.VERSION;
import android.text.TextUtils;

/**
 * BuildCompat contains additional platform version checking methods for
 * testing compatibility with new features.
 */
public class BuildCompat {
    private BuildCompat() {
    }

    /**
     * Check if the device is running on the Android N release or newer.
     * This method is suitable for use with preview SDKs and associated
     * prerelease device builds.
     *
     * @return true if N APIs are available for use
     */
    public static boolean isAtLeastN() {
        if (TextUtils.isEmpty(VERSION.CODENAME)) {
            return false;
        }
        final char prefix = VERSION.CODENAME.charAt(0);
        return prefix >= 'N' && prefix <= 'Z';
    }
}

Make BuildCompat.isAtLeastN more forward-compatible am: 415793dccd