private void updateVolumesLocked() {
mRoots.clear();
final int userId = UserHandle.myUserId();
final List<VolumeInfo> volumes = mStorageManager.getVolumes();
for (VolumeInfo volume : volumes) {
if (!volume.isMountedReadable()) continue;
final String rootId;
final String title;
if (volume.getType() == VolumeInfo.TYPE_EMULATED) {
// We currently only support a single emulated volume mounted at
// a time, and it's always considered the primary
rootId = ROOT_ID_PRIMARY_EMULATED;
if (VolumeInfo.ID_EMULATED_INTERNAL.equals(volume.getId())) {
title = getContext().getString(R.string.root_internal_storage);
} else {
final VolumeInfo privateVol = mStorageManager.findPrivateForEmulated(volume);
title = mStorageManager.getBestVolumeDescription(privateVol);
}
} else if (volume.getType() == VolumeInfo.TYPE_PUBLIC) {
rootId = volume.getFsUuid();
title = mStorageManager.getBestVolumeDescription(volume);
} else {
// Unsupported volume; ignore
continue;
}
if (TextUtils.isEmpty(rootId)) {
Log.d(TAG, "Missing UUID for " + volume.getId() + "; skipping");
continue;
}
if (mRoots.containsKey(rootId)) {
Log.w(TAG, "Duplicate UUID " + rootId + " for " + volume.getId() + "; skipping");
continue;
}
try {
final RootInfo root = new RootInfo();
mRoots.put(rootId, root);
root.rootId = rootId;
root.flags =
Root.FLAG_SUPPORTS_CREATE
| Root.FLAG_LOCAL_ONLY
| Root.FLAG_ADVANCED
| Root.FLAG_SUPPORTS_SEARCH
| Root.FLAG_SUPPORTS_IS_CHILD;
root.title = title;
if (volume.getType() == VolumeInfo.TYPE_PUBLIC) {
root.flags |= Root.FLAG_HAS_SETTINGS;
}
if (volume.isVisibleForRead(userId)) {
root.visiblePath = volume.getPathForUser(userId);
} else {
root.visiblePath = null;
}
root.path = volume.getInternalPathForUser(userId);
root.docId = getDocIdForFile(root.path);
} catch (FileNotFoundException e) {
throw new IllegalStateException(e);
}
}
Log.d(TAG, "After updating volumes, found " + mRoots.size() + " active roots");
// Note this affects content://com.android.externalstorage.documents/root/39BD-07C5
// as well as content://com.android.externalstorage.documents/document/*/children,
// so just notify on content://com.android.externalstorage.documents/.
getContext().getContentResolver().notifyChange(BASE_URI, null, false);
}
