第一种，通过DocumentProvider:
private void handleDocumentsProvider() {
String authority = "com.android.externalstorage.documents";
final Uri rootsUri = DocumentsContract.buildRootsUri("com.android.externalstorage.documents");
ContentResolver resolver = getContentResolver();
final ContentProviderClient client = resolver.acquireUnstableContentProviderClient(
authority);
final PackageManager pm = getPackageManager();
ProviderInfo provider = pm.resolveContentProvider(
authority, PackageManager.GET_META_DATA);
if (provider == null) {
Log.w(TAG, "Failed to get provider info for " + authority);
}
if (!provider.exported) {
Log.w(TAG, "Provider is not exported. Failed to load roots for " + authority);
}
if (!provider.grantUriPermissions) {
Log.w(TAG, "Provider doesn't grantUriPermissions. Failed to load roots for "
+ authority);
}
if (!android.Manifest.permission.MANAGE_DOCUMENTS.equals(provider.readPermission)
|| !android.Manifest.permission.MANAGE_DOCUMENTS.equals(provider.writePermission)) {
Log.w(TAG, "Provider is not protected by MANAGE_DOCUMENTS. Failed to load roots for "
+ authority);
}
Cursor cursor = null;
try {
cursor = client.query(rootsUri, null, null, null, null);
} catch (RemoteException e) {
e.printStackTrace();
}
while (cursor.moveToNext()) {
String rootId = getCursorString(cursor, DocumentsContract.Root.COLUMN_ROOT_ID);
String title = getCursorString(cursor, DocumentsContract.Root.COLUMN_TITLE);
String summary = getCursorString(cursor, DocumentsContract.Root.COLUMN_SUMMARY);
String documentId = getCursorString(cursor, DocumentsContract.Root.COLUMN_DOCUMENT_ID);
long availableBytes = getCursorLong(cursor, DocumentsContract.Root.COLUMN_AVAILABLE_BYTES);
long capacityBytes = getCursorLong(cursor, DocumentsContract.Root.COLUMN_CAPACITY_BYTES);
String mimeTypes = getCursorString(cursor, DocumentsContract.Root.COLUMN_MIME_TYPES);
String flags = getCursorString(cursor, DocumentsContract.Root.COLUMN_FLAGS);
DocumentPathBean documentPathBean = new DocumentPathBean(rootId, title, documentId, availableBytes, flags, "/storage/" + rootId);
Log.e(TAG, "rootId:" + rootId + "flags:" + flags);
if(!"primary".equals(rootId) && !"home".equals(rootId)){
Log.e(TAG, "rootId:" + rootId + "title:" + title
+"summary:" + summary +"documentId:" + documentId +"availableBytes:" + availableBytes +"capacityBytes:" + capacityBytes +"mimeTypes:" + mimeTypes);
}
}
}
第二种,通过StorageManager,无法使用的记得用反射;
private HashMap<String, String> getUsbDrivePath() {
final StorageManager sm = getSystemService(StorageManager.class);
final List<StorageVolume> volumes = sm.getStorageVolumes();
HashMap<String, String> paths = new HashMap<>();
volumes.forEach(new Consumer<StorageVolume>() {
@Override
public void accept(StorageVolume volume) {
File path = volume.getPathFile();
if (volume.isPrimary()) {
Log.v("storageVolume:", "put desc primary");
// pathMap.put("primary",path.getAbsolutePath());
} else {
String state = volume.getState();
Log.v("storageVolume:", "path" + path.exists());
Log.v("storageVolume:", "path isDirectory" + path.isDirectory());
Log.v("storageVolume:", "path isFile " + path.isFile());
Log.v("storageVolume:", "path " + path.getAbsolutePath());
Log.v("storageVolume:", "put desc " + volume.getDescription(DocumentActivity.this) + "volume.isPrimary:" + volume.isPrimary());
// String mediaStoreVolumeName = storageVolume.getMediaStoreVolumeName();
// String absolutePath = storageVolume.getDirectory().getAbsolutePath();
}
}
});
return paths;
}