/**
* Returns absolute paths to application-specific directories on all external storage devices
* where the application's OBB files (if there are any) can be found. Note if the application does
* not have any OBB files, these directories may not exist.
*
* <p>This is like {@link Context#getFilesDir()} in that these files will be deleted when the
* application is uninstalled, however there are some important differences:
*
* <ul>
* <li>External files are not always available: they will disappear if the user mounts the
* external storage on a computer or removes it.
* <li>There is no security enforced with these files.
* </ul>
*
* <p>External storage devices returned here are considered a permanent part of the device,
* including both emulated external storage and physical media slots, such as SD cards in a
* battery compartment. The returned paths do not include transient devices, such as USB flash
* drives.
*
* <p>An application may store data on any or all of the returned devices. For example, an app may
* choose to store large files on the device with the most available space, as measured by {@link
* StatFs}.
*
* <p>Starting in {@link android.os.Build.VERSION_CODES#KITKAT}, no permissions are required to
* write to the returned paths; they're always accessible to the calling app. Before then, {@link
* android.Manifest.permission#WRITE_EXTERNAL_STORAGE} is required to write. Write access outside
* of these paths on secondary external storage devices is not available. To request external
* storage access in a backwards compatible way, consider using {@code android:maxSdkVersion} like
* this:
*
* <pre class="prettyprint"><uses-permission
* android:name="android.permission.WRITE_EXTERNAL_STORAGE"
* android:maxSdkVersion="18" /></pre>
*
* <p>The first path returned is the same as {@link Context#getObbDir()}. Returned paths may be
* {@code null} if a storage device is unavailable.
*
* @see Context#getObbDir()
* @see EnvironmentCompat#getStorageState(File)
*/
public static File[] getObbDirs(Context context) {
final int version = Build.VERSION.SDK_INT;
if (version >= 19) {
return ContextCompatKitKat.getObbDirs(context);
} else {
final File single;
if (version >= 11) {
single = ContextCompatHoneycomb.getObbDir(context);
} else {
single =
buildPath(
Environment.getExternalStorageDirectory(),
DIR_ANDROID,
DIR_OBB,
context.getPackageName());
}
return new File[] {single};
}
}
/**
* Returns absolute paths to application-specific directories on all external storage devices
* where the application can place cache files it owns. These files are internal to the
* application, and not typically visible to the user as media.
*
* <p>This is like {@link Context#getCacheDir()} in that these files will be deleted when the
* application is uninstalled, however there are some important differences:
*
* <ul>
* <li>External files are not always available: they will disappear if the user mounts the
* external storage on a computer or removes it.
* <li>There is no security enforced with these files.
* </ul>
*
* <p>External storage devices returned here are considered a permanent part of the device,
* including both emulated external storage and physical media slots, such as SD cards in a
* battery compartment. The returned paths do not include transient devices, such as USB flash
* drives.
*
* <p>An application may store data on any or all of the returned devices. For example, an app may
* choose to store large files on the device with the most available space, as measured by {@link
* StatFs}.
*
* <p>Starting in {@link android.os.Build.VERSION_CODES#KITKAT}, no permissions are required to
* write to the returned paths; they're always accessible to the calling app. Before then, {@link
* android.Manifest.permission#WRITE_EXTERNAL_STORAGE} is required to write. Write access outside
* of these paths on secondary external storage devices is not available. To request external
* storage access in a backwards compatible way, consider using {@code android:maxSdkVersion} like
* this:
*
* <pre class="prettyprint"><uses-permission
* android:name="android.permission.WRITE_EXTERNAL_STORAGE"
* android:maxSdkVersion="18" /></pre>
*
* <p>The first path returned is the same as {@link Context#getExternalCacheDir()}. Returned paths
* may be {@code null} if a storage device is unavailable.
*
* @see Context#getExternalCacheDir()
* @see EnvironmentCompat#getStorageState(File)
*/
public static File[] getExternalCacheDirs(Context context) {
final int version = Build.VERSION.SDK_INT;
if (version >= 19) {
return ContextCompatKitKat.getExternalCacheDirs(context);
} else {
final File single;
if (version >= 8) {
single = ContextCompatFroyo.getExternalCacheDir(context);
} else {
single =
buildPath(
Environment.getExternalStorageDirectory(),
DIR_ANDROID,
DIR_DATA,
context.getPackageName(),
DIR_CACHE);
}
return new File[] {single};
}
}