| /* |
| * 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 |
| * |
| * 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.os.ext; |
| |
| import android.annotation.IntDef; |
| import android.os.Build.VERSION_CODES; |
| import android.os.SystemProperties; |
| |
| import java.lang.annotation.Retention; |
| import java.lang.annotation.RetentionPolicy; |
| |
| /** @hide */ |
| public class SdkExtensions { |
| |
| private static final int R_EXTENSION_INT; |
| static { |
| R_EXTENSION_INT = SystemProperties.getInt("persist.com.android.sdkext.sdk_info", 0); |
| } |
| |
| /** Values suitable as parameters for {@link #getExtensionVersion(int)}. */ |
| @IntDef(value = { VERSION_CODES.R }) |
| @Retention(RetentionPolicy.SOURCE) |
| public @interface SdkVersion {} |
| |
| /** |
| * Return the version of the extension to the given SDK. |
| * |
| * @param sdk the SDK version to get the extension version of. |
| * @see SdkVersion |
| * @throws IllegalArgumentException if sdk is not an sdk version with extensions |
| */ |
| public static int getExtensionVersion(@SdkVersion int sdk) { |
| if (sdk < VERSION_CODES.R) { |
| throw new IllegalArgumentException(); |
| } |
| return R_EXTENSION_INT; |
| } |
| |
| } |