SdkVersion.java revision 40bb73886c61d4b2e96bab98b50c1cbfcb54d9a3 
1/*
2 * Copyright 2010 Google Inc.
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 */
16package com.google.android.testing.mocking;
17
18import java.lang.reflect.Field;
19import java.util.ArrayList;
20import java.util.List;
21
22
23/**
24 * Represents different SDK versions of the Android SDK.
25 *
26 * @author swoodward@google.com (Stephen Woodward)
27 */
28public enum SdkVersion {
29  UNKNOWN("", -1), CUPCAKE("v15", 3), DONUT("v16", 4), ECLAIR_0_1("v201", 6),
30  ECLAIR_MR1("v21", 7), FROYO("v22", 8), GINGERBREAD("v23", 9);
31
32  private static final int SDK_VERSION;
33
34  static {
35    String sdkString = null;
36    int sdkInt;
37    try {
38      Class<?> buildClass = Class.forName("android.os.Build$VERSION");
39      Field sdkField = buildClass.getField("SDK");
40      sdkString = (String) sdkField.get(null);
41      sdkInt = Integer.parseInt(sdkString);
42    } catch (Exception e) {
43      // This will always happen on the desktop side.  No big deal.
44      if (sdkString != null) {
45        // But this is unexpected
46        System.out.println(e.toString());
47        e.printStackTrace();
48      }
49      sdkInt = -1;
50    }
51    SDK_VERSION = sdkInt;
52  }
53
54  private final String prefix;
55  private final String versionName;
56  private final int apiLevel;
57
58  private SdkVersion(String packagePrefix, int apiLevel) {
59    versionName = packagePrefix;
60    prefix = packagePrefix.length() == 0 ? "" : packagePrefix + ".";
61    this.apiLevel = apiLevel;
62  }
63
64  /**
65   * Returns an array of SdkVersion objects.  This is to be favoured over the
66   * {@link #values()} method, since that method will also return the UNKNOWN
67   * SDK version, which is not usually a valid version on which to operate.
68   *
69   * @return an array of SdkVersion objects.
70   */
71  public static SdkVersion[] getAllVersions() {
72    List<SdkVersion> versions = new ArrayList<SdkVersion>();
73    for (SdkVersion version : values()) {
74      if (!version.equals(UNKNOWN)) {
75        versions.add(version);
76      }
77    }
78    return versions.toArray(new SdkVersion[versions.size()]);
79  }
80
81  public String getVersionName() {
82    return versionName;
83  }
84
85  public String getPackagePrefix() {
86    return prefix;
87  }
88
89  /**
90   * Returns the current SDK version, or UNKNOWN if the version cannot be determined (for instance
91   * if this method is invoked from within a J2SE environment).
92   * @return the current SDK version.
93   */
94  public static SdkVersion getCurrentVersion() {
95    return getVersionFor(SDK_VERSION);
96  }
97
98  static SdkVersion getVersionFor(int apiLevel) {
99    for (SdkVersion version : values()) {
100      if (version.apiLevel == apiLevel) {
101        return version;
102      }
103    }
104    return UNKNOWN;
105  }
106}
107