The Android Open Source Project | 9066cfe | 2009-03-03 19:31:44 -0800 | [diff] [blame] | 1 | /* |
| 2 | * Copyright (C) 2007 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 | |
| 17 | package android.os; |
| 18 | |
Dianne Hackborn | 407f625 | 2010-10-04 11:31:17 -0700 | [diff] [blame] | 19 | import android.content.res.Resources; |
San Mehat | b104340 | 2010-02-05 08:26:50 -0800 | [diff] [blame] | 20 | import android.os.storage.IMountService; |
Kenny Root | b2278dc | 2011-01-18 13:03:28 -0800 | [diff] [blame] | 21 | import android.util.Log; |
San Mehat | 7fd0fee | 2009-12-17 07:12:23 -0800 | [diff] [blame] | 22 | |
Gilles Debunne | ee1d630 | 2011-05-13 10:09:32 -0700 | [diff] [blame^] | 23 | import java.io.File; |
| 24 | |
The Android Open Source Project | 9066cfe | 2009-03-03 19:31:44 -0800 | [diff] [blame] | 25 | /** |
| 26 | * Provides access to environment variables. |
| 27 | */ |
| 28 | public class Environment { |
Kenny Root | b2278dc | 2011-01-18 13:03:28 -0800 | [diff] [blame] | 29 | private static final String TAG = "Environment"; |
The Android Open Source Project | 9066cfe | 2009-03-03 19:31:44 -0800 | [diff] [blame] | 30 | |
| 31 | private static final File ROOT_DIRECTORY |
| 32 | = getDirectory("ANDROID_ROOT", "/system"); |
| 33 | |
Oscar Montemayor | a8529f6 | 2009-11-18 10:14:20 -0800 | [diff] [blame] | 34 | private static final String SYSTEM_PROPERTY_EFS_ENABLED = "persist.security.efs.enabled"; |
| 35 | |
Kenny Root | e1ff214 | 2010-10-12 11:20:01 -0700 | [diff] [blame] | 36 | private static final Object mLock = new Object(); |
| 37 | |
| 38 | private volatile static Boolean mIsExternalStorageEmulated = null; |
San Mehat | 7fd0fee | 2009-12-17 07:12:23 -0800 | [diff] [blame] | 39 | |
The Android Open Source Project | 9066cfe | 2009-03-03 19:31:44 -0800 | [diff] [blame] | 40 | /** |
| 41 | * Gets the Android root directory. |
| 42 | */ |
| 43 | public static File getRootDirectory() { |
| 44 | return ROOT_DIRECTORY; |
| 45 | } |
| 46 | |
Jason parks | a3cdaa5 | 2011-01-13 14:15:43 -0600 | [diff] [blame] | 47 | /** |
| 48 | * Gets the system directory available for secure storage. |
| 49 | * If Encrypted File system is enabled, it returns an encrypted directory (/data/secure/system). |
| 50 | * Otherwise, it returns the unencrypted /data/system directory. |
| 51 | * @return File object representing the secure storage system directory. |
| 52 | * @hide |
| 53 | */ |
| 54 | public static File getSystemSecureDirectory() { |
| 55 | if (isEncryptedFilesystemEnabled()) { |
| 56 | return new File(SECURE_DATA_DIRECTORY, "system"); |
| 57 | } else { |
| 58 | return new File(DATA_DIRECTORY, "system"); |
| 59 | } |
| 60 | } |
| 61 | |
| 62 | /** |
| 63 | * Gets the data directory for secure storage. |
| 64 | * If Encrypted File system is enabled, it returns an encrypted directory (/data/secure). |
| 65 | * Otherwise, it returns the unencrypted /data directory. |
| 66 | * @return File object representing the data directory for secure storage. |
| 67 | * @hide |
| 68 | */ |
| 69 | public static File getSecureDataDirectory() { |
| 70 | if (isEncryptedFilesystemEnabled()) { |
| 71 | return SECURE_DATA_DIRECTORY; |
| 72 | } else { |
| 73 | return DATA_DIRECTORY; |
| 74 | } |
| 75 | } |
| 76 | |
| 77 | /** |
| 78 | * Returns whether the Encrypted File System feature is enabled on the device or not. |
| 79 | * @return <code>true</code> if Encrypted File System feature is enabled, <code>false</code> |
| 80 | * if disabled. |
| 81 | * @hide |
| 82 | */ |
| 83 | public static boolean isEncryptedFilesystemEnabled() { |
| 84 | return SystemProperties.getBoolean(SYSTEM_PROPERTY_EFS_ENABLED, false); |
| 85 | } |
| 86 | |
The Android Open Source Project | 9066cfe | 2009-03-03 19:31:44 -0800 | [diff] [blame] | 87 | private static final File DATA_DIRECTORY |
| 88 | = getDirectory("ANDROID_DATA", "/data"); |
| 89 | |
Oscar Montemayor | a8529f6 | 2009-11-18 10:14:20 -0800 | [diff] [blame] | 90 | /** |
| 91 | * @hide |
| 92 | */ |
| 93 | private static final File SECURE_DATA_DIRECTORY |
| 94 | = getDirectory("ANDROID_SECURE_DATA", "/data/secure"); |
| 95 | |
The Android Open Source Project | 9066cfe | 2009-03-03 19:31:44 -0800 | [diff] [blame] | 96 | private static final File EXTERNAL_STORAGE_DIRECTORY |
| 97 | = getDirectory("EXTERNAL_STORAGE", "/sdcard"); |
| 98 | |
Dianne Hackborn | e83cefce | 2010-02-04 17:38:14 -0800 | [diff] [blame] | 99 | private static final File EXTERNAL_STORAGE_ANDROID_DATA_DIRECTORY |
| 100 | = new File (new File(getDirectory("EXTERNAL_STORAGE", "/sdcard"), |
| 101 | "Android"), "data"); |
| 102 | |
| 103 | private static final File EXTERNAL_STORAGE_ANDROID_MEDIA_DIRECTORY |
| 104 | = new File (new File(getDirectory("EXTERNAL_STORAGE", "/sdcard"), |
| 105 | "Android"), "media"); |
| 106 | |
Dianne Hackborn | 805fd7e | 2011-01-16 18:30:29 -0800 | [diff] [blame] | 107 | private static final File EXTERNAL_STORAGE_ANDROID_OBB_DIRECTORY |
| 108 | = new File (new File(getDirectory("EXTERNAL_STORAGE", "/sdcard"), |
| 109 | "Android"), "obb"); |
| 110 | |
The Android Open Source Project | 9066cfe | 2009-03-03 19:31:44 -0800 | [diff] [blame] | 111 | private static final File DOWNLOAD_CACHE_DIRECTORY |
| 112 | = getDirectory("DOWNLOAD_CACHE", "/cache"); |
| 113 | |
| 114 | /** |
| 115 | * Gets the Android data directory. |
| 116 | */ |
| 117 | public static File getDataDirectory() { |
| 118 | return DATA_DIRECTORY; |
| 119 | } |
| 120 | |
| 121 | /** |
Dianne Hackborn | e83cefce | 2010-02-04 17:38:14 -0800 | [diff] [blame] | 122 | * Gets the Android external storage directory. This directory may not |
| 123 | * currently be accessible if it has been mounted by the user on their |
| 124 | * computer, has been removed from the device, or some other problem has |
| 125 | * happened. You can determine its current state with |
| 126 | * {@link #getExternalStorageState()}. |
| 127 | * |
Dianne Hackborn | 407f625 | 2010-10-04 11:31:17 -0700 | [diff] [blame] | 128 | * <p><em>Note: don't be confused by the word "external" here. This |
| 129 | * directory can better be thought as media/shared storage. It is a |
| 130 | * filesystem that can hold a relatively large amount of data and that |
| 131 | * is shared across all applications (does not enforce permissions). |
| 132 | * Traditionally this is an SD card, but it may also be implemented as |
| 133 | * built-in storage in a device that is distinct from the protected |
| 134 | * internal storage and can be mounted as a filesystem on a computer.</em></p> |
| 135 | * |
| 136 | * <p>In devices with multiple "external" storage directories (such as |
| 137 | * both secure app storage and mountable shared storage), this directory |
| 138 | * represents the "primary" external storage that the user will interact |
| 139 | * with.</p> |
| 140 | * |
Dianne Hackborn | acaf028 | 2010-03-30 14:39:35 -0700 | [diff] [blame] | 141 | * <p>Applications should not directly use this top-level directory, in |
| 142 | * order to avoid polluting the user's root namespace. Any files that are |
| 143 | * private to the application should be placed in a directory returned |
| 144 | * by {@link android.content.Context#getExternalFilesDir |
| 145 | * Context.getExternalFilesDir}, which the system will take care of deleting |
| 146 | * if the application is uninstalled. Other shared files should be placed |
| 147 | * in one of the directories returned by |
| 148 | * {@link #getExternalStoragePublicDirectory}. |
| 149 | * |
Dianne Hackborn | e83cefce | 2010-02-04 17:38:14 -0800 | [diff] [blame] | 150 | * <p>Here is an example of typical code to monitor the state of |
| 151 | * external storage:</p> |
| 152 | * |
| 153 | * {@sample development/samples/ApiDemos/src/com/example/android/apis/content/ExternalStorage.java |
| 154 | * monitor_storage} |
Dianne Hackborn | 407f625 | 2010-10-04 11:31:17 -0700 | [diff] [blame] | 155 | * |
| 156 | * @see #getExternalStorageState() |
| 157 | * @see #isExternalStorageRemovable() |
The Android Open Source Project | 9066cfe | 2009-03-03 19:31:44 -0800 | [diff] [blame] | 158 | */ |
| 159 | public static File getExternalStorageDirectory() { |
| 160 | return EXTERNAL_STORAGE_DIRECTORY; |
| 161 | } |
| 162 | |
| 163 | /** |
Dianne Hackborn | e83cefce | 2010-02-04 17:38:14 -0800 | [diff] [blame] | 164 | * Standard directory in which to place any audio files that should be |
| 165 | * in the regular list of music for the user. |
| 166 | * This may be combined with |
| 167 | * {@link #DIRECTORY_PODCASTS}, {@link #DIRECTORY_NOTIFICATIONS}, |
| 168 | * {@link #DIRECTORY_ALARMS}, and {@link #DIRECTORY_RINGTONES} as a series |
| 169 | * of directories to categories a particular audio file as more than one |
| 170 | * type. |
| 171 | */ |
| 172 | public static String DIRECTORY_MUSIC = "Music"; |
| 173 | |
| 174 | /** |
| 175 | * Standard directory in which to place any audio files that should be |
| 176 | * in the list of podcasts that the user can select (not as regular |
| 177 | * music). |
| 178 | * This may be combined with {@link #DIRECTORY_MUSIC}, |
| 179 | * {@link #DIRECTORY_NOTIFICATIONS}, |
| 180 | * {@link #DIRECTORY_ALARMS}, and {@link #DIRECTORY_RINGTONES} as a series |
| 181 | * of directories to categories a particular audio file as more than one |
| 182 | * type. |
| 183 | */ |
| 184 | public static String DIRECTORY_PODCASTS = "Podcasts"; |
| 185 | |
| 186 | /** |
| 187 | * Standard directory in which to place any audio files that should be |
| 188 | * in the list of ringtones that the user can select (not as regular |
| 189 | * music). |
| 190 | * This may be combined with {@link #DIRECTORY_MUSIC}, |
| 191 | * {@link #DIRECTORY_PODCASTS}, {@link #DIRECTORY_NOTIFICATIONS}, and |
| 192 | * {@link #DIRECTORY_ALARMS} as a series |
| 193 | * of directories to categories a particular audio file as more than one |
| 194 | * type. |
| 195 | */ |
| 196 | public static String DIRECTORY_RINGTONES = "Ringtones"; |
| 197 | |
| 198 | /** |
| 199 | * Standard directory in which to place any audio files that should be |
| 200 | * in the list of alarms that the user can select (not as regular |
| 201 | * music). |
| 202 | * This may be combined with {@link #DIRECTORY_MUSIC}, |
| 203 | * {@link #DIRECTORY_PODCASTS}, {@link #DIRECTORY_NOTIFICATIONS}, |
| 204 | * and {@link #DIRECTORY_RINGTONES} as a series |
| 205 | * of directories to categories a particular audio file as more than one |
| 206 | * type. |
| 207 | */ |
| 208 | public static String DIRECTORY_ALARMS = "Alarms"; |
| 209 | |
| 210 | /** |
| 211 | * Standard directory in which to place any audio files that should be |
| 212 | * in the list of notifications that the user can select (not as regular |
| 213 | * music). |
| 214 | * This may be combined with {@link #DIRECTORY_MUSIC}, |
| 215 | * {@link #DIRECTORY_PODCASTS}, |
| 216 | * {@link #DIRECTORY_ALARMS}, and {@link #DIRECTORY_RINGTONES} as a series |
| 217 | * of directories to categories a particular audio file as more than one |
| 218 | * type. |
| 219 | */ |
| 220 | public static String DIRECTORY_NOTIFICATIONS = "Notifications"; |
| 221 | |
| 222 | /** |
| 223 | * Standard directory in which to place pictures that are available to |
| 224 | * the user. Note that this is primarily a convention for the top-level |
| 225 | * public directory, as the media scanner will find and collect pictures |
| 226 | * in any directory. |
| 227 | */ |
| 228 | public static String DIRECTORY_PICTURES = "Pictures"; |
| 229 | |
| 230 | /** |
| 231 | * Standard directory in which to place movies that are available to |
| 232 | * the user. Note that this is primarily a convention for the top-level |
| 233 | * public directory, as the media scanner will find and collect movies |
| 234 | * in any directory. |
| 235 | */ |
| 236 | public static String DIRECTORY_MOVIES = "Movies"; |
| 237 | |
| 238 | /** |
| 239 | * Standard directory in which to place files that have been downloaded by |
| 240 | * the user. Note that this is primarily a convention for the top-level |
| 241 | * public directory, you are free to download files anywhere in your own |
Dianne Hackborn | ce59fb8 | 2010-04-07 17:19:04 -0700 | [diff] [blame] | 242 | * private directories. Also note that though the constant here is |
| 243 | * named DIRECTORY_DOWNLOADS (plural), the actual file name is non-plural for |
| 244 | * backwards compatibility reasons. |
Dianne Hackborn | e83cefce | 2010-02-04 17:38:14 -0800 | [diff] [blame] | 245 | */ |
Dianne Hackborn | ce59fb8 | 2010-04-07 17:19:04 -0700 | [diff] [blame] | 246 | public static String DIRECTORY_DOWNLOADS = "Download"; |
Dianne Hackborn | e83cefce | 2010-02-04 17:38:14 -0800 | [diff] [blame] | 247 | |
| 248 | /** |
| 249 | * The traditional location for pictures and videos when mounting the |
| 250 | * device as a camera. Note that this is primarily a convention for the |
| 251 | * top-level public directory, as this convention makes no sense elsewhere. |
| 252 | */ |
| 253 | public static String DIRECTORY_DCIM = "DCIM"; |
| 254 | |
| 255 | /** |
| 256 | * Get a top-level public external storage directory for placing files of |
| 257 | * a particular type. This is where the user will typically place and |
| 258 | * manage their own files, so you should be careful about what you put here |
| 259 | * to ensure you don't erase their files or get in the way of their own |
| 260 | * organization. |
| 261 | * |
| 262 | * <p>Here is an example of typical code to manipulate a picture on |
| 263 | * the public external storage:</p> |
| 264 | * |
| 265 | * {@sample development/samples/ApiDemos/src/com/example/android/apis/content/ExternalStorage.java |
| 266 | * public_picture} |
| 267 | * |
| 268 | * @param type The type of storage directory to return. Should be one of |
| 269 | * {@link #DIRECTORY_MUSIC}, {@link #DIRECTORY_PODCASTS}, |
| 270 | * {@link #DIRECTORY_RINGTONES}, {@link #DIRECTORY_ALARMS}, |
| 271 | * {@link #DIRECTORY_NOTIFICATIONS}, {@link #DIRECTORY_PICTURES}, |
| 272 | * {@link #DIRECTORY_MOVIES}, {@link #DIRECTORY_DOWNLOADS}, or |
| 273 | * {@link #DIRECTORY_DCIM}. May not be null. |
| 274 | * |
| 275 | * @return Returns the File path for the directory. Note that this |
| 276 | * directory may not yet exist, so you must make sure it exists before |
| 277 | * using it such as with {@link File#mkdirs File.mkdirs()}. |
| 278 | */ |
| 279 | public static File getExternalStoragePublicDirectory(String type) { |
| 280 | return new File(getExternalStorageDirectory(), type); |
| 281 | } |
| 282 | |
| 283 | /** |
| 284 | * Returns the path for android-specific data on the SD card. |
| 285 | * @hide |
| 286 | */ |
| 287 | public static File getExternalStorageAndroidDataDir() { |
| 288 | return EXTERNAL_STORAGE_ANDROID_DATA_DIRECTORY; |
| 289 | } |
| 290 | |
| 291 | /** |
| 292 | * Generates the raw path to an application's data |
| 293 | * @hide |
| 294 | */ |
| 295 | public static File getExternalStorageAppDataDirectory(String packageName) { |
| 296 | return new File(EXTERNAL_STORAGE_ANDROID_DATA_DIRECTORY, packageName); |
| 297 | } |
| 298 | |
| 299 | /** |
| 300 | * Generates the raw path to an application's media |
| 301 | * @hide |
| 302 | */ |
| 303 | public static File getExternalStorageAppMediaDirectory(String packageName) { |
| 304 | return new File(EXTERNAL_STORAGE_ANDROID_MEDIA_DIRECTORY, packageName); |
| 305 | } |
| 306 | |
| 307 | /** |
Dianne Hackborn | 805fd7e | 2011-01-16 18:30:29 -0800 | [diff] [blame] | 308 | * Generates the raw path to an application's OBB files |
| 309 | * @hide |
| 310 | */ |
| 311 | public static File getExternalStorageAppObbDirectory(String packageName) { |
| 312 | return new File(EXTERNAL_STORAGE_ANDROID_OBB_DIRECTORY, packageName); |
| 313 | } |
| 314 | |
| 315 | /** |
Dianne Hackborn | e83cefce | 2010-02-04 17:38:14 -0800 | [diff] [blame] | 316 | * Generates the path to an application's files. |
| 317 | * @hide |
| 318 | */ |
| 319 | public static File getExternalStorageAppFilesDirectory(String packageName) { |
| 320 | return new File(new File(EXTERNAL_STORAGE_ANDROID_DATA_DIRECTORY, |
| 321 | packageName), "files"); |
| 322 | } |
| 323 | |
| 324 | /** |
| 325 | * Generates the path to an application's cache. |
| 326 | * @hide |
| 327 | */ |
| 328 | public static File getExternalStorageAppCacheDirectory(String packageName) { |
| 329 | return new File(new File(EXTERNAL_STORAGE_ANDROID_DATA_DIRECTORY, |
| 330 | packageName), "cache"); |
| 331 | } |
| 332 | |
| 333 | /** |
The Android Open Source Project | 9066cfe | 2009-03-03 19:31:44 -0800 | [diff] [blame] | 334 | * Gets the Android Download/Cache content directory. |
| 335 | */ |
| 336 | public static File getDownloadCacheDirectory() { |
| 337 | return DOWNLOAD_CACHE_DIRECTORY; |
| 338 | } |
| 339 | |
| 340 | /** |
Gilles Debunne | ee1d630 | 2011-05-13 10:09:32 -0700 | [diff] [blame^] | 341 | * {@link #getExternalStorageState()} returns MEDIA_REMOVED if the media is not present. |
The Android Open Source Project | 9066cfe | 2009-03-03 19:31:44 -0800 | [diff] [blame] | 342 | */ |
| 343 | public static final String MEDIA_REMOVED = "removed"; |
| 344 | |
| 345 | /** |
Gilles Debunne | ee1d630 | 2011-05-13 10:09:32 -0700 | [diff] [blame^] | 346 | * {@link #getExternalStorageState()} returns MEDIA_UNMOUNTED if the media is present |
The Android Open Source Project | 9066cfe | 2009-03-03 19:31:44 -0800 | [diff] [blame] | 347 | * but not mounted. |
| 348 | */ |
| 349 | public static final String MEDIA_UNMOUNTED = "unmounted"; |
| 350 | |
| 351 | /** |
Gilles Debunne | ee1d630 | 2011-05-13 10:09:32 -0700 | [diff] [blame^] | 352 | * {@link #getExternalStorageState()} returns MEDIA_CHECKING if the media is present |
The Android Open Source Project | 9066cfe | 2009-03-03 19:31:44 -0800 | [diff] [blame] | 353 | * and being disk-checked |
| 354 | */ |
| 355 | public static final String MEDIA_CHECKING = "checking"; |
| 356 | |
| 357 | /** |
Gilles Debunne | ee1d630 | 2011-05-13 10:09:32 -0700 | [diff] [blame^] | 358 | * {@link #getExternalStorageState()} returns MEDIA_NOFS if the media is present |
The Android Open Source Project | 9066cfe | 2009-03-03 19:31:44 -0800 | [diff] [blame] | 359 | * but is blank or is using an unsupported filesystem |
| 360 | */ |
| 361 | public static final String MEDIA_NOFS = "nofs"; |
| 362 | |
| 363 | /** |
Gilles Debunne | ee1d630 | 2011-05-13 10:09:32 -0700 | [diff] [blame^] | 364 | * {@link #getExternalStorageState()} returns MEDIA_MOUNTED if the media is present |
The Android Open Source Project | 9066cfe | 2009-03-03 19:31:44 -0800 | [diff] [blame] | 365 | * and mounted at its mount point with read/write access. |
| 366 | */ |
| 367 | public static final String MEDIA_MOUNTED = "mounted"; |
| 368 | |
| 369 | /** |
Gilles Debunne | ee1d630 | 2011-05-13 10:09:32 -0700 | [diff] [blame^] | 370 | * {@link #getExternalStorageState()} returns MEDIA_MOUNTED_READ_ONLY if the media is present |
The Android Open Source Project | 9066cfe | 2009-03-03 19:31:44 -0800 | [diff] [blame] | 371 | * and mounted at its mount point with read only access. |
| 372 | */ |
| 373 | public static final String MEDIA_MOUNTED_READ_ONLY = "mounted_ro"; |
| 374 | |
| 375 | /** |
Gilles Debunne | ee1d630 | 2011-05-13 10:09:32 -0700 | [diff] [blame^] | 376 | * {@link #getExternalStorageState()} returns MEDIA_SHARED if the media is present |
The Android Open Source Project | 9066cfe | 2009-03-03 19:31:44 -0800 | [diff] [blame] | 377 | * not mounted, and shared via USB mass storage. |
| 378 | */ |
| 379 | public static final String MEDIA_SHARED = "shared"; |
| 380 | |
| 381 | /** |
Gilles Debunne | ee1d630 | 2011-05-13 10:09:32 -0700 | [diff] [blame^] | 382 | * {@link #getExternalStorageState()} returns MEDIA_BAD_REMOVAL if the media was |
The Android Open Source Project | 9066cfe | 2009-03-03 19:31:44 -0800 | [diff] [blame] | 383 | * removed before it was unmounted. |
| 384 | */ |
| 385 | public static final String MEDIA_BAD_REMOVAL = "bad_removal"; |
| 386 | |
| 387 | /** |
Gilles Debunne | ee1d630 | 2011-05-13 10:09:32 -0700 | [diff] [blame^] | 388 | * {@link #getExternalStorageState()} returns MEDIA_UNMOUNTABLE if the media is present |
The Android Open Source Project | 9066cfe | 2009-03-03 19:31:44 -0800 | [diff] [blame] | 389 | * but cannot be mounted. Typically this happens if the file system on the |
| 390 | * media is corrupted. |
| 391 | */ |
| 392 | public static final String MEDIA_UNMOUNTABLE = "unmountable"; |
| 393 | |
| 394 | /** |
Dianne Hackborn | 407f625 | 2010-10-04 11:31:17 -0700 | [diff] [blame] | 395 | * Gets the current state of the primary "external" storage device. |
Dianne Hackborn | e83cefce | 2010-02-04 17:38:14 -0800 | [diff] [blame] | 396 | * |
Dianne Hackborn | 407f625 | 2010-10-04 11:31:17 -0700 | [diff] [blame] | 397 | * <p>See {@link #getExternalStorageDirectory()} for more information. |
The Android Open Source Project | 9066cfe | 2009-03-03 19:31:44 -0800 | [diff] [blame] | 398 | */ |
| 399 | public static String getExternalStorageState() { |
San Mehat | 7fd0fee | 2009-12-17 07:12:23 -0800 | [diff] [blame] | 400 | try { |
Kenny Root | b2278dc | 2011-01-18 13:03:28 -0800 | [diff] [blame] | 401 | IMountService mountService = IMountService.Stub.asInterface(ServiceManager |
| 402 | .getService("mount")); |
| 403 | return mountService.getVolumeState(getExternalStorageDirectory() |
Kenny Root | e1ff214 | 2010-10-12 11:20:01 -0700 | [diff] [blame] | 404 | .toString()); |
San Mehat | a6a7281 | 2010-01-07 22:39:53 -0800 | [diff] [blame] | 405 | } catch (Exception rex) { |
San Mehat | 7fd0fee | 2009-12-17 07:12:23 -0800 | [diff] [blame] | 406 | return Environment.MEDIA_REMOVED; |
| 407 | } |
The Android Open Source Project | 9066cfe | 2009-03-03 19:31:44 -0800 | [diff] [blame] | 408 | } |
| 409 | |
Dianne Hackborn | 407f625 | 2010-10-04 11:31:17 -0700 | [diff] [blame] | 410 | /** |
| 411 | * Returns whether the primary "external" storage device is removable. |
| 412 | * If true is returned, this device is for example an SD card that the |
| 413 | * user can remove. If false is returned, the storage is built into |
| 414 | * the device and can not be physically removed. |
| 415 | * |
| 416 | * <p>See {@link #getExternalStorageDirectory()} for more information. |
| 417 | */ |
| 418 | public static boolean isExternalStorageRemovable() { |
Mike Lockwood | 70ee3ca | 2011-01-19 10:19:12 -0800 | [diff] [blame] | 419 | if (isExternalStorageEmulated()) return false; |
Dianne Hackborn | 407f625 | 2010-10-04 11:31:17 -0700 | [diff] [blame] | 420 | return Resources.getSystem().getBoolean( |
| 421 | com.android.internal.R.bool.config_externalStorageRemovable); |
| 422 | } |
| 423 | |
Kenny Root | e1ff214 | 2010-10-12 11:20:01 -0700 | [diff] [blame] | 424 | /** |
| 425 | * Returns whether the device has an external storage device which is |
Andy Stadler | 50c294f | 2011-03-07 19:13:42 -0800 | [diff] [blame] | 426 | * emulated. If true, the device does not have real external storage, and the directory |
| 427 | * returned by {@link #getExternalStorageDirectory()} will be allocated using a portion of |
| 428 | * the internal storage system. |
| 429 | * |
| 430 | * <p>Certain system services, such as the package manager, use this |
Kenny Root | e1ff214 | 2010-10-12 11:20:01 -0700 | [diff] [blame] | 431 | * to determine where to install an application. |
Andy Stadler | 50c294f | 2011-03-07 19:13:42 -0800 | [diff] [blame] | 432 | * |
| 433 | * <p>Emulated external storage may also be encrypted - see |
| 434 | * {@link android.app.admin.DevicePolicyManager#setStorageEncryption( |
| 435 | * android.content.ComponentName, boolean)} for additional details. |
Kenny Root | e1ff214 | 2010-10-12 11:20:01 -0700 | [diff] [blame] | 436 | */ |
| 437 | public static boolean isExternalStorageEmulated() { |
| 438 | if (mIsExternalStorageEmulated == null) { |
| 439 | synchronized (mLock) { |
| 440 | if (mIsExternalStorageEmulated == null) { |
| 441 | boolean externalStorageEmulated; |
| 442 | try { |
Kenny Root | b2278dc | 2011-01-18 13:03:28 -0800 | [diff] [blame] | 443 | IMountService mountService = IMountService.Stub.asInterface(ServiceManager |
| 444 | .getService("mount")); |
| 445 | externalStorageEmulated = mountService.isExternalStorageEmulated(); |
| 446 | mIsExternalStorageEmulated = Boolean.valueOf(externalStorageEmulated); |
Kenny Root | e1ff214 | 2010-10-12 11:20:01 -0700 | [diff] [blame] | 447 | } catch (Exception e) { |
Kenny Root | b2278dc | 2011-01-18 13:03:28 -0800 | [diff] [blame] | 448 | Log.e(TAG, "couldn't talk to MountService", e); |
| 449 | return false; |
Kenny Root | e1ff214 | 2010-10-12 11:20:01 -0700 | [diff] [blame] | 450 | } |
Kenny Root | e1ff214 | 2010-10-12 11:20:01 -0700 | [diff] [blame] | 451 | } |
| 452 | } |
| 453 | } |
| 454 | return mIsExternalStorageEmulated; |
| 455 | } |
| 456 | |
The Android Open Source Project | 9066cfe | 2009-03-03 19:31:44 -0800 | [diff] [blame] | 457 | static File getDirectory(String variableName, String defaultPath) { |
| 458 | String path = System.getenv(variableName); |
| 459 | return path == null ? new File(defaultPath) : new File(path); |
| 460 | } |
| 461 | } |