content: /*
   * Copyright (C) 2013 The Android Open Source Project
   *
   * Licensed under the Apache License, Version 2.0 (the "License");
   * you may not use this file except in compliance with the License.
   * You may obtain a copy of the License at
   *
   *      http://www.apache.org/licenses/LICENSE-2.0
   *
   * Unless required by applicable law or agreed to in writing, software
   * distributed under the License is distributed on an "AS IS" BASIS,
   * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
   * See the License for the specific language governing permissions and
   * limitations under the License.
   */
  
  package dev.dworks.apps.anexplorer.model;
  
  import android.annotation.TargetApi;
  import android.content.ContentProviderClient;
  import android.content.ContentResolver;
  import android.content.Context;
  import android.content.Intent;
  import android.content.pm.PackageManager;
  import android.content.pm.ProviderInfo;
  import android.content.pm.ResolveInfo;
  import android.content.res.AssetFileDescriptor;
  import android.database.Cursor;
  import android.graphics.Bitmap;
  import android.graphics.BitmapFactory;
  import android.graphics.Matrix;
  import android.graphics.Point;
  import android.net.Uri;
  import android.os.Build;
  import android.os.Bundle;
  import android.os.CancellationSignal;
  import android.os.OperationCanceledException;
  import android.os.ParcelFileDescriptor;
  import android.os.RemoteException;
  import android.provider.MediaStore;
  import android.provider.OpenableColumns;
  import androidx.annotation.Nullable;
  import androidx.exifinterface.media.ExifInterface;
  import android.util.Log;
  import android.widget.SearchView.OnCloseListener;
  
  import java.io.BufferedInputStream;
  import java.io.File;
  import java.io.FileDescriptor;
  import java.io.FileInputStream;
  import java.io.FileNotFoundException;
  import java.io.IOException;
  import java.util.ArrayList;
  import java.util.List;
  
  import dev.dworks.apps.anexplorer.libcore.io.IoUtils;
  import dev.dworks.apps.anexplorer.misc.ContentProviderClientCompat;
  import dev.dworks.apps.anexplorer.misc.CrashReportingManager;
  import dev.dworks.apps.anexplorer.misc.ImageUtils;
  import dev.dworks.apps.anexplorer.misc.OsCompat;
  import dev.dworks.apps.anexplorer.misc.Utils;
  import dev.dworks.apps.anexplorer.provider.DocumentsProvider;
  import dev.dworks.apps.anexplorer.provider.UsbStorageProvider;
  
  import static dev.dworks.apps.anexplorer.misc.SAFManager.DOCUMENT_AUTHORITY;
  
  /**
   * Defines the contract between a documents provider and the platform.
   * <p>
   * To create a document provider, extend {@link DocumentsProvider}, which
   * provides a foundational implementation of this contract.
   *
   * @see DocumentsProvider
   */
  public final class DocumentsContract {
      private static final String TAG = "Documents";
  
      // content://com.example/root/
      // content://com.example/root/sdcard/
      // content://com.example/root/sdcard/recent/
      // content://com.example/root/sdcard/search/?query=pony
      // content://com.example/document/12/
      // content://com.example/document/12/children/
      // content://com.example/tree/12/document/24/
      // content://com.example/tree/12/document/24/children/
  
      private DocumentsContract() {
      }
  
      /**
       * Intent action used to identify {@link DocumentsProvider} instances. This
       * is used in the {@code <intent-filter>} of a {@code <provider>}.
       */
      public static final String PROVIDER_INTERFACE = "dev.dworks.apps.anexplorer.action.DOCUMENTS_PROVIDER";
  
      /** {@hide} */
      public static final String EXTRA_PACKAGE_NAME = "android.content.extra.PACKAGE_NAME";
      
      /** {@hide} */
      public static final String EXTRA_SHOW_ADVANCED = "android.content.extra.SHOW_ADVANCED";
  
      public static final String EXTRA_SHOW_FILESIZE = "android.content.extra.SHOW_FILESIZE";
  
      public static final String EXTRA_FANCY_FEATURES = "android.content.extra.FANCY";
  
      public static final String EXTRA_TARGET_URI = "android.content.extra.TARGET_URI";
  
      /**
       * Set this in a DocumentsUI intent to cause a package's own roots to be
       * excluded from the roots list.
       */
      public static final String EXTRA_EXCLUDE_SELF = "android.provider.extra.EXCLUDE_SELF";
  
      /**
       * Included in {@link AssetFileDescriptor#getExtras()} when returned
       * thumbnail should be rotated.
       *
       * @see MediaStore.Images.ImageColumns#ORIENTATION
       * @hide
       */
      public static final String EXTRA_ORIENTATION = "android.content.extra.ORIENTATION";
      /**
       * Overrides the default prompt text in DocumentsUI when set in an intent.
       */
      public static final String EXTRA_PROMPT = "android.provider.extra.PROMPT";
      /** {@hide} */
      public static final String ACTION_MANAGE_ROOT = "android.provider.action.MANAGE_ROOT";
      /** {@hide} */
      public static final String ACTION_MANAGE_DOCUMENT = "android.provider.action.MANAGE_DOCUMENT";
  
      /** {@hide} */
      public static final String ACTION_BROWSE = "android.provider.action.BROWSE";
  
      /** {@hide} */
      public static final String
              ACTION_BROWSE_DOCUMENT_ROOT = "android.provider.action.BROWSE_DOCUMENT_ROOT";
      /** {@hide} */
      public static final String
              ACTION_DOCUMENT_ROOT_SETTINGS = "android.provider.action.DOCUMENT_ROOT_SETTINGS";
      /**
       * Buffer is large enough to rewind past any EXIF headers.
       */
      private static final int THUMBNAIL_BUFFER_SIZE = (int) (128 * 1024);
      /** {@hide} */
      public static final String PACKAGE_DOCUMENTS_UI = "com.android.documents";
  
      /**
       * Constants related to a document, including {@link Cursor} column names
       * and flags.
       * <p>
       * A document can be either an openable stream (with a specific MIME type),
       * or a directory containing additional documents (with the
       * {@link #MIME_TYPE_DIR} MIME type). A directory represents the top of a
       * subtree containing zero or more documents, which can recursively contain
       * even more documents and directories.
       * <p>
       * All columns are <em>read-only</em> to client applications.
       */
      public final static class Document {
          private Document() {
          }
  
          /**
           * Unique ID of a document. This ID is both provided by and interpreted
           * by a {@link DocumentsProvider}, and should be treated as an opaque
           * value by client applications. This column is required.
           * <p>
           * Each document must have a unique ID within a provider, but that
           * single document may be included as a child of multiple directories.
           * <p>
           * A provider must always return durable IDs, since they will be used to
           * issue long-term URI permission grants when an application interacts
           * with {@link Intent#ACTION_OPEN_DOCUMENT} and
           * {@link Intent#ACTION_CREATE_DOCUMENT}.
           * <p>
           * Type: STRING
           */
          public static final String COLUMN_DOCUMENT_ID = "document_id";
  
          /**
           * Concrete MIME type of a document. For example, "image/png" or
           * "application/pdf" for openable files. A document can also be a
           * directory containing additional documents, which is represented with
           * the {@link #MIME_TYPE_DIR} MIME type. This column is required.
           * <p>
           * Type: STRING
           *
           * @see #MIME_TYPE_DIR
           */
          public static final String COLUMN_MIME_TYPE = "mime_type";
  
          /**
           * Display name of a document, used as the primary title displayed to a
           * user. This column is required.
           * <p>
           * Type: STRING
           */
          public static final String COLUMN_DISPLAY_NAME = OpenableColumns.DISPLAY_NAME;
  
          /**
           * Summary of a document, which may be shown to a user. This column is
           * optional, and may be {@code null}.
           * <p>
           * Type: STRING
           */
          public static final String COLUMN_SUMMARY = "summary";
  
          /**
           * Timestamp when a document was last modified, in milliseconds since
           * January 1, 1970 00:00:00.0 UTC. This column is required, and may be
           * {@code null} if unknown. A {@link DocumentsProvider} can update this
           * field using events from {@link OnCloseListener} or other reliable
           * {@link ParcelFileDescriptor} transports.
           * <p>
           * Type: INTEGER (long)
           *
           * @see System#currentTimeMillis()
           */
          public static final String COLUMN_LAST_MODIFIED = "last_modified";
  
          /**
           * Specific icon resource ID for a document. This column is optional,
           * and may be {@code null} to use a platform-provided default icon based
           * on {@link #COLUMN_MIME_TYPE}.
           * <p>
           * Type: INTEGER (int)
           */
          public static final String COLUMN_ICON = "icon";
  
          /**
           * Flags that apply to a document. This column is required.
           * <p>
           * Type: INTEGER (int)
           *
           * @see #FLAG_SUPPORTS_WRITE
           * @see #FLAG_SUPPORTS_DELETE
           * @see #FLAG_SUPPORTS_THUMBNAIL
           * @see #FLAG_DIR_PREFERS_GRID
           * @see #FLAG_DIR_PREFERS_LAST_MODIFIED
           * @see #FLAG_VIRTUAL_DOCUMENT
           * @see #FLAG_ARCHIVE
           * @see #FLAG_SUPPORTS_COPY
           * @see #FLAG_SUPPORTS_MOVE
           * @see #FLAG_SUPPORTS_REMOVE
           */
          public static final String COLUMN_FLAGS = "flags";
  
          /**
           * Size of a document, in bytes, or {@code null} if unknown. This column
           * is required.
           * <p>
           * Type: INTEGER (long)
           */
          public static final String COLUMN_SIZE = OpenableColumns.SIZE;
  
  
          public static final String COLUMN_PATH = "path";
          /**
           * MIME type of a document which is a directory that may contain
           * additional documents.
           *
           * @see #COLUMN_MIME_TYPE
           */
          public static final String MIME_TYPE_DIR = "vnd.android.document/directory";
  
          /**
           * MIME type of a apk file
           *
           * @see #COLUMN_MIME_TYPE
           */
          public static final String MIME_TYPE_APK = "application/vnd.android.package-archive";
          
          public static final String MIME_TYPE_HIDDEN = "vnd.android.document/hidden";
          
          /**
           * Flag indicating that a document can be represented as a thumbnail.
           *
           * @see #COLUMN_FLAGS
           * @see DocumentsContract#getDocumentThumbnail(ContentResolver, Uri,
           *      Point, CancellationSignal)
           * @see DocumentsProvider#openDocumentThumbnail(String, Point,
           *      CancellationSignal)
           */
          public static final int FLAG_SUPPORTS_THUMBNAIL = 1;
  
          /**
           * Flag indicating that a document supports writing.
           * <p>
           * When a document is opened with {@link Intent#ACTION_OPEN_DOCUMENT},
           * the calling application is granted both
           * {@link Intent#FLAG_GRANT_READ_URI_PERMISSION} and
           * {@link Intent#FLAG_GRANT_WRITE_URI_PERMISSION}. However, the actual
           * writability of a document may change over time, for example due to
           * remote access changes. This flag indicates that a document client can
           * expect {@link ContentResolver#openOutputStream(Uri)} to succeed.
           * 
           * @see #COLUMN_FLAGS
           */
          public static final int FLAG_SUPPORTS_WRITE = 1 << 1;
  
          /**
           * Flag indicating that a document is deletable.
           *
           * @see #COLUMN_FLAGS
           * @see DocumentsContract#deleteDocument(ContentResolver, Uri)
           * @see DocumentsProvider#deleteDocument(String)
           */
          public static final int FLAG_SUPPORTS_DELETE = 1 << 2;
  
          /**
           * Flag indicating that a document is a directory that supports creation
           * of new files within it. Only valid when {@link #COLUMN_MIME_TYPE} is
           * {@link #MIME_TYPE_DIR}.
           *
           * @see #COLUMN_FLAGS
           * @see DocumentsProvider#createDocument(String, String, String)
           */
          public static final int FLAG_DIR_SUPPORTS_CREATE = 1 << 3;
  
          /**
           * Flag indicating that a directory prefers its contents be shown in a
           * larger format grid. Usually suitable when a directory contains mostly
           * pictures. Only valid when {@link #COLUMN_MIME_TYPE} is
           * {@link #MIME_TYPE_DIR}.
           *
           * @see #COLUMN_FLAGS
           */
          public static final int FLAG_DIR_PREFERS_GRID = 1 << 4;
  
          /**
           * Flag indicating that a directory prefers its contents be sorted by
           * {@link #COLUMN_LAST_MODIFIED}. Only valid when
           * {@link #COLUMN_MIME_TYPE} is {@link #MIME_TYPE_DIR}.
           *
           * @see #COLUMN_FLAGS
           */
          public static final int FLAG_DIR_PREFERS_LAST_MODIFIED = 1 << 5;
  
          /**
           * Flag indicating that a document can be renamed.
           *
           * @see #COLUMN_FLAGS
           * @see android.provider.DocumentsProvider#renameDocument(String, String)
           */
          public static final int FLAG_SUPPORTS_RENAME = 1 << 6;
  
          /**
           * Flag indicating that a document can be copied to another location
           * within the same document provider.
           *
           * @see #COLUMN_FLAGS
           * @see DocumentsContract#copyDocument(ContentProviderClient, Uri, Uri)
           * @see DocumentsProvider#copyDocument(String, String)
           */
          public static final int FLAG_SUPPORTS_COPY = 1 << 7;
  
          /**
           * Flag indicating that a document can be moved to another location
           * within the same document provider.
           *
           * @see #COLUMN_FLAGS
           * @see DocumentsContract#moveDocument(ContentProviderClient, Uri, Uri, Uri)
           * @see DocumentsProvider#moveDocument(String, String, String)
           */
          public static final int FLAG_SUPPORTS_MOVE = 1 << 8;
  
          /**
           * Flag indicating that a document is virtual, and doesn't have byte
           * representation in the MIME type specified as {@link #COLUMN_MIME_TYPE}.
           *
           * @see #COLUMN_FLAGS
           * @see #COLUMN_MIME_TYPE
           * @see DocumentsProvider#openTypedDocument(String, String, Bundle,
           *      android.os.CancellationSignal)
           * @see DocumentsProvider#getDocumentStreamTypes(String, String)
           */
          public static final int FLAG_VIRTUAL_DOCUMENT = 1 << 9;
  
          /**
           * Flag indicating that a document can be removed from a parent.
           *
           * @see #COLUMN_FLAGS
           * @see DocumentsContract#removeDocument(ContentProviderClient, Uri, Uri)
           * @see DocumentsProvider#removeDocument(String, String)
           */
          public static final int FLAG_SUPPORTS_REMOVE = 1 << 10;
  
          /**
           * Flag indicating that a document is an archive, and it's contents can be
           * obtained via {@link DocumentsProvider#queryChildDocuments}.
           * <p>
           * The <em>provider</em> support library offers utility classes to add common
           * archive support.
           *
           * @see #COLUMN_FLAGS
           * @see DocumentsProvider#queryChildDocuments(String, String[], String)
           * @hide
           */
          public static final int FLAG_ARCHIVE = 1 << 15;
  
          /**
           * Flag indicating that a document is not complete, likely its
           * contents are being downloaded. Partial files cannot be opened,
           * copied, moved in the UI. But they can be deleted and retried
           * if they represent a failed download.
           *
           * @see #COLUMN_FLAGS
           * @hide
           */
          public static final int FLAG_PARTIAL = 1 << 16;
  
          /**
           * Flag indicating that document titles should be hidden when viewing
           * this directory in a larger format grid. For example, a directory
           * containing only images may want the image thumbnails to speak for
           * themselves. Only valid when {@link #COLUMN_MIME_TYPE} is
           * {@link #MIME_TYPE_DIR}.
           *
           * @see #COLUMN_FLAGS
           * @see #FLAG_DIR_PREFERS_GRID
           * @hide
           */
          public static final int FLAG_DIR_HIDE_GRID_TITLES = 1 << 17;
          
          public static final int FLAG_SUPPORTS_EDIT = 1 << 18;
          public static final int FLAG_SUPPORTS_ARCHIVE = 1 << 19;
          public static final int FLAG_SUPPORTS_BOOKMARK = 1 << 20;
      }
  
      /**
       * Constants related to a root of documents, including {@link Cursor} column
       * names and flags. A root is the start of a tree of documents, such as a
       * physical storage device, or an account. Each root starts at the directory
       * referenced by {@link Root#COLUMN_DOCUMENT_ID}, which can recursively
       * contain both documents and directories.
       * <p>
       * All columns are <em>read-only</em> to client applications.
       */
      public final static class Root {
          private Root() {
          }
  
          /**
           * Unique ID of a root. This ID is both provided by and interpreted by a
           * {@link DocumentsProvider}, and should be treated as an opaque value
           * by client applications. This column is required.
           * <p>
           * Type: STRING
           */
          public static final String COLUMN_ROOT_ID = "root_id";
  
          /**
           * Flags that apply to a root. This column is required.
           * <p>
           * Type: INTEGER (int)
           *
           * @see #FLAG_LOCAL_ONLY
           * @see #FLAG_SUPPORTS_CREATE
           * @see #FLAG_SUPPORTS_RECENTS
           * @see #FLAG_SUPPORTS_SEARCH
           */
          public static final String COLUMN_FLAGS = "flags";
  
          /**
           * Icon resource ID for a root. This column is required.
           * <p>
           * Type: INTEGER (int)
           */
          public static final String COLUMN_ICON = "icon";
  
          /**
           * Title for a root, which will be shown to a user. This column is
           * required. For a single storage service surfacing multiple accounts as
           * different roots, this title should be the name of the service.
           * <p>
           * Type: STRING
           */
          public static final String COLUMN_TITLE = "title";
  
          /**
           * Summary for this root, which may be shown to a user. This column is
           * optional, and may be {@code null}. For a single storage service
           * surfacing multiple accounts as different roots, this summary should
           * be the name of the account.
           * <p>
           * Type: STRING
           */
          public static final String COLUMN_SUMMARY = "summary";
  
          /**
           * Document which is a directory that represents the top directory of
           * this root. This column is required.
           * <p>
           * Type: STRING
           *
           * @see Document#COLUMN_DOCUMENT_ID
           */
          public static final String COLUMN_DOCUMENT_ID = "document_id";
  
          /**
           * Number of bytes available in this root. This column is optional, and
           * may be {@code null} if unknown or unbounded.
           * <p>
           * Type: INTEGER (long)
           */
          public static final String COLUMN_AVAILABLE_BYTES = "available_bytes";
  
          /**
           * Capacity of a root in bytes. This column is optional, and may be
           * {@code null} if unknown or unbounded.
           * <p>
           * Type: INTEGER (long)
           */
          public static final String COLUMN_CAPACITY_BYTES = "capacity_bytes";
  
          /**
           * MIME types supported by this root. This column is optional, and if
           * {@code null} the root is assumed to support all MIME types. Multiple
           * MIME types can be separated by a newline. For example, a root
           * supporting audio might return "audio/*\napplication/x-flac".
           * <p>
           * Type: STRING
           */
          public static final String COLUMN_MIME_TYPES = "mime_types";
  
          public static final String COLUMN_PATH = "path";
  
          /** {@hide} */
          public static final String MIME_TYPE_ITEM = "vnd.android.document/root";
  
          /**
           * Flag indicating that at least one directory under this root supports
           * creating content. Roots with this flag will be shown when an
           * application interacts with {@link Intent#ACTION_CREATE_DOCUMENT}.
           *
           * @see #COLUMN_FLAGS
           */
          public static final int FLAG_SUPPORTS_CREATE = 1;
  
          /**
           * Flag indicating that this root offers content that is strictly local
           * on the device. That is, no network requests are made for the content.
           *
           * @see #COLUMN_FLAGS
           * @see Intent#EXTRA_LOCAL_ONLY
           */
          public static final int FLAG_LOCAL_ONLY = 1 << 1;
  
          /**
           * Flag indicating that this root can be queried to provide recently
           * modified documents.
           *
           * @see #COLUMN_FLAGS
           * @see DocumentsContract#buildRecentDocumentsUri(String, String)
           * @see DocumentsProvider#queryRecentDocuments(String, String[])
           */
          public static final int FLAG_SUPPORTS_RECENTS = 1 << 2;
  
          /**
           * Flag indicating that this root supports search.
           *
           * @see #COLUMN_FLAGS
           * @see DocumentsContract#buildSearchDocumentsUri(String, String,
           *      String)
           * @see DocumentsProvider#querySearchDocuments(String, String,
           *      String[])
           */
          public static final int FLAG_SUPPORTS_SEARCH = 1 << 3;
  
          /**
           * Flag indicating that this root supports testing parent child
           * relationships.
           *
           * @see #COLUMN_FLAGS
           * @see android.provider.DocumentsProvider#isChildDocument(String, String)
           */
          public static final int FLAG_SUPPORTS_IS_CHILD = 1 << 4;
  
          /**
           * Flag indicating that this root is currently empty. This may be used
           * to hide the root when opening documents, but the root will still be
           * shown when creating documents and {@link #FLAG_SUPPORTS_CREATE} is
           * also set. If the value of this flag changes, such as when a root
           * becomes non-empty, you must send a content changed notification for
           * {@link DocumentsContract#buildRootsUri(String)}.
           *
           * @see #COLUMN_FLAGS
           * @see ContentResolver#notifyChange(Uri,
           *      android.database.ContentObserver, boolean)
           * @hide
           */
          public static final int FLAG_EMPTY = 1 << 16;
  
          /**
           * Flag indicating that this root should only be visible to advanced
           * users.
           *
           * @see #COLUMN_FLAGS
           * @hide
           */
          public static final int FLAG_ADVANCED = 1 << 17;
  
          /**
           * Flag indicating that this root has settings.
           *
           * @see #COLUMN_FLAGS
           * @see DocumentsContract#ACTION_DOCUMENT_ROOT_SETTINGS
           * @hide
           */
          public static final int FLAG_HAS_SETTINGS = 1 << 18;
  
          /**
           * Flag indicating that this root is on removable SD card storage.
           *
           * @see #COLUMN_FLAGS
           * @hide
           */
          public static final int FLAG_REMOVABLE_SD = 1 << 19;
  
          /**
           * Flag indicating that this root is on removable USB storage.
           *
           * @see #COLUMN_FLAGS
           * @hide
           */
          public static final int FLAG_REMOVABLE_USB = 1 << 20;
  
          public static final int FLAG_SUPPORTS_EDIT = 1 << 90;
  
          public static final int FLAG_SUPER_ADVANCED = 1 << 91;
  
          public static final int FLAG_CONNECTION_SERVER = 1 << 92;
      }
  
      /**
       * Optional boolean flag included in a directory {@link Cursor#getExtras()}
       * indicating that a document provider is still loading data. For example, a
       * provider has returned some results, but is still waiting on an
       * outstanding network request. The provider must send a content changed
       * notification when loading is finished.
       *
       * @see ContentResolver#notifyChange(Uri, android.database.ContentObserver,
       *      boolean)
       */
      public static final String EXTRA_LOADING = "loading";
  
      /**
       * Optional string included in a directory {@link Cursor#getExtras()}
       * providing an informational message that should be shown to a user. For
       * example, a provider may wish to indicate that not all documents are
       * available.
       */
      public static final String EXTRA_INFO = "info";
  
      /**
       * Optional string included in a directory {@link Cursor#getExtras()}
       * providing an error message that should be shown to a user. For example, a
       * provider may wish to indicate that a network error occurred. The user may
       * choose to retry, resulting in a new query.
       */
      public static final String EXTRA_ERROR = "error";
  
      /**
       * Optional result (I'm thinking boolean) answer to a question.
       * {@hide}
       */
      public static final String EXTRA_RESULT = "result";
  
      /** {@hide} */
      public static final String METHOD_CREATE_DOCUMENT = "android:createDocument";
      /** {@hide} */
      public static final String METHOD_RENAME_DOCUMENT = "android:renameDocument";
      /** {@hide} */
      public static final String METHOD_DELETE_DOCUMENT = "android:deleteDocument";
      /** {@hide} */
      public static final String METHOD_COPY_DOCUMENT = "android:copyDocument";
      /** {@hide} */
      public static final String METHOD_MOVE_DOCUMENT = "android:moveDocument";
      /** {@hide} */
      public static final String METHOD_IS_CHILD_DOCUMENT = "android:isChildDocument";
      /** {@hide} */
      public static final String METHOD_REMOVE_DOCUMENT = "android:removeDocument";
      /** {@hide} */
      public static final String METHOD_UPLOAD_DOCUMENT = "android:uploadDocument";
  
      public static final String METHOD_COMPRESS_DOCUMENT = "android:compressDocument";
      public static final String METHOD_UNCOMPRESS_DOCUMENT = "android:uncompressDocument";
  
      /** {@hide} */
      public static final String EXTRA_PARENT_URI = "parentUri";
      /** {@hide} */
      public static final String EXTRA_URI = "uri";
      public static final String EXTRA_UPLOAD_URI = "upload_uri";
      public static final String EXTRA_THUMBNAIL_SIZE = "thumbnail_size";
      public static final String EXTRA_DOCUMENT_TO= "document_to";
      public static final String EXTRA_DELETE_AFTER = "delete_after";
      public static final String EXTRA_DOCUMENTS_COMPRESS = "documents_compress";
      public static final String EXTRA_DOCUMENTS_UNCOMPRESS = "documents_uncompress";
  
      private static final String PATH_ROOT = "root";
      private static final String PATH_RECENT = "recent";
      private static final String PATH_DOCUMENT = "document";
      private static final String PATH_CHILDREN = "children";
      private static final String PATH_SEARCH = "search";
      private static final String PATH_TREE = "tree";
  
      private static final String PARAM_QUERY = "query";
      private static final String PARAM_MANAGE = "manage";
  
      /**
       * Build URI representing the roots of a document provider. When queried, a
       * provider will return one or more rows with columns defined by
       * {@link Root}.
       *
       * @see DocumentsProvider#queryRoots(String[])
       */
      public static Uri buildRootsUri(String authority) {
          return new Uri.Builder().scheme(ContentResolver.SCHEME_CONTENT)
                  .authority(authority).appendPath(PATH_ROOT).build();
      }
  
      /**
       * Build URI representing the given {@link Root#COLUMN_ROOT_ID} in a
       * document provider.
       *
       * @see #getRootId(Uri)
       */
      public static Uri buildRootUri(String authority, String rootId) {
          return new Uri.Builder().scheme(ContentResolver.SCHEME_CONTENT)
                  .authority(authority).appendPath(PATH_ROOT).appendPath(rootId).build();
      }
  
      /**
       * Builds URI for user home directory on external (local) storage.
       */
      public static Uri buildHomeUri() {
          // TODO: Avoid this type of interpackage copying. Added here to avoid
          // direct coupling, but not ideal.
          return DocumentsContract.buildRootUri(DOCUMENT_AUTHORITY, "home");
      }
  
      /**
       * Build URI representing the recently modified documents of a specific root
       * in a document provider. When queried, a provider will return zero or more
       * rows with columns defined by {@link Document}.
       *
       * @see DocumentsProvider#queryRecentDocuments(String, String[])
       * @see #getRootId(Uri)
       */
      public static Uri buildRecentDocumentsUri(String authority, String rootId) {
          return new Uri.Builder().scheme(ContentResolver.SCHEME_CONTENT)
                  .authority(authority).appendPath(PATH_ROOT).appendPath(rootId)
                  .appendPath(PATH_RECENT).build();
      }
  
      /**
       * Build URI representing access to descendant documents of the given
       * {@link dev.dworks.apps.anexplorer.model.DocumentsContract.Document#COLUMN_DOCUMENT_ID}.
       *
       * @see #getTreeDocumentId(android.net.Uri)
       */
      public static Uri buildTreeDocumentUri(String authority, String documentId) {
          return new Uri.Builder().scheme(ContentResolver.SCHEME_CONTENT).authority(authority)
                  .appendPath(PATH_TREE).appendPath(documentId).build();
      }
  
      /**
       * Build URI representing the target {@link dev.dworks.apps.anexplorer.model.DocumentsContract.Document#COLUMN_DOCUMENT_ID} in
       * a document provider. When queried, a provider will return a single row
       * with columns defined by {@link dev.dworks.apps.anexplorer.model.DocumentsContract.Document}.
       *
       * @see android.provider.DocumentsProvider#queryDocument(String, String[])
       * @see #getDocumentId(android.net.Uri)
       */
      public static Uri buildDocumentUri(String authority, String documentId) {
          return new Uri.Builder().scheme(ContentResolver.SCHEME_CONTENT)
                  .authority(authority).appendPath(PATH_DOCUMENT).appendPath(documentId).build();
      }
  
      /**
       * Build URI representing the target {@link dev.dworks.apps.anexplorer.model.DocumentsContract.Document#COLUMN_DOCUMENT_ID} in
       * a document provider. When queried, a provider will return a single row
       * with columns defined by {@link dev.dworks.apps.anexplorer.model.DocumentsContract.Document}.
       * <p>
       * However, instead of directly accessing the target document, the returned
       * URI will leverage access granted through a subtree URI, typically
       * returned by {@link android.content.Intent#ACTION_OPEN_DOCUMENT_TREE}. The target document
       * must be a descendant (child, grandchild, etc) of the subtree.
       * <p>
       * This is typically used to access documents under a user-selected
       * directory tree, since it doesn't require the user to separately confirm
       * each new document access.
       *
       * @param treeUri the subtree to leverage to gain access to the target
       *            document. The target directory must be a descendant of this
       *            subtree.
       * @param documentId the target document, which the caller may not have
       *            direct access to.
       * @see android.content.Intent#ACTION_OPEN_DOCUMENT_TREE
       * @see android.provider.DocumentsProvider#isChildDocument(String, String)
       * @see #buildDocumentUri(String, String)
       */
      public static Uri buildDocumentUriUsingTree(Uri treeUri, String documentId) {
          return new Uri.Builder().scheme(ContentResolver.SCHEME_CONTENT)
                  .authority(treeUri.getAuthority()).appendPath(PATH_TREE)
                  .appendPath(getTreeDocumentId(treeUri)).appendPath(PATH_DOCUMENT)
                  .appendPath(documentId).build();
      }
  
      /** {@hide} */
      public static Uri buildDocumentUriMaybeUsingTree(Uri baseUri, String documentId) {
          if (isTreeUri(baseUri)) {
              return buildDocumentUriUsingTree(baseUri, documentId);
          } else {
              return buildDocumentUri(baseUri.getAuthority(), documentId);
          }
      }
  
      /**
       * Build URI representing the children of the target directory in a document
       * provider. When queried, a provider will return zero or more rows with
       * columns defined by {@link Document}.
       *
       * @param parentDocumentId the document to return children for, which must
       *            be a directory with MIME type of
       *            {@link Document#MIME_TYPE_DIR}.
       * @see DocumentsProvider#queryChildDocuments(String, String[], String)
       * @see #getDocumentId(Uri)
       */
      public static Uri buildChildDocumentsUri(String authority, String parentDocumentId) {
          return new Uri.Builder().scheme(ContentResolver.SCHEME_CONTENT).authority(authority)
                  .appendPath(PATH_DOCUMENT).appendPath(parentDocumentId).appendPath(PATH_CHILDREN)
                  .build();
      }
  
      /**
       * Build URI representing the children of the target directory in a document
       * provider. When queried, a provider will return zero or more rows with
       * columns defined by {@link dev.dworks.apps.anexplorer.model.DocumentsContract.Document}.
       * <p>
       * However, instead of directly accessing the target directory, the returned
       * URI will leverage access granted through a subtree URI, typically
       * returned by {@link android.content.Intent#ACTION_OPEN_DOCUMENT_TREE}. The target
       * directory must be a descendant (child, grandchild, etc) of the subtree.
       * <p>
       * This is typically used to access documents under a user-selected
       * directory tree, since it doesn't require the user to separately confirm
       * each new document access.
       *
       * @param treeUri the subtree to leverage to gain access to the target
       *            document. The target directory must be a descendant of this
       *            subtree.
       * @param parentDocumentId the document to return children for, which the
       *            caller may not have direct access to, and which must be a
       *            directory with MIME type of {@link dev.dworks.apps.anexplorer.model.DocumentsContract.Document#MIME_TYPE_DIR}.
       * @see android.content.Intent#ACTION_OPEN_DOCUMENT_TREE
       * @see android.provider.DocumentsProvider#isChildDocument(String, String)
       * @see #buildChildDocumentsUri(String, String)
       */
      public static Uri buildChildDocumentsUriUsingTree(Uri treeUri, String parentDocumentId) {
          return new Uri.Builder().scheme(ContentResolver.SCHEME_CONTENT)
                  .authority(treeUri.getAuthority()).appendPath(PATH_TREE)
                  .appendPath(getTreeDocumentId(treeUri)).appendPath(PATH_DOCUMENT)
                  .appendPath(parentDocumentId).appendPath(PATH_CHILDREN).build();
      }
  
      /**
       * Build URI representing a search for matching documents under a specific
       * root in a document provider. When queried, a provider will return zero or
       * more rows with columns defined by {@link Document}.
       *
       * @see DocumentsProvider#querySearchDocuments(String, String, String[])
       * @see #getRootId(Uri)
       * @see #getSearchDocumentsQuery(Uri)
       */
      public static Uri buildSearchDocumentsUri(
              String authority, String rootId, String query) {
          return new Uri.Builder().scheme(ContentResolver.SCHEME_CONTENT).authority(authority)
                  .appendPath(PATH_ROOT).appendPath(rootId).appendPath(PATH_SEARCH)
                  .appendQueryParameter(PARAM_QUERY, query).build();
      }
  
      /**
       * Test if the given URI represents a {@link Document} backed by a
       * {@link DocumentsProvider}.
       *
       * @see #buildDocumentUri(String, String)
       * @see #buildDocumentUriUsingTree(Uri, String)
       */
      public static boolean isDocumentUri(Context context, @Nullable Uri uri) {
          if (isContentUri(uri) && isDocumentsProvider(context, uri.getAuthority())) {
              final List<String> paths = uri.getPathSegments();
              if (paths.size() == 2) {
                  return PATH_DOCUMENT.equals(paths.get(0));
              } else if (paths.size() == 4) {
                  return PATH_TREE.equals(paths.get(0)) && PATH_DOCUMENT.equals(paths.get(2));
              }
          }
          return false;
      }
  
      public static boolean isRootUri(Context context, @Nullable Uri uri) {
          if (isContentUri(uri) && isDocumentsProvider(context, uri.getAuthority())) {
              final List<String> paths = uri.getPathSegments();
              return (paths.size() == 2 && PATH_ROOT.equals(paths.get(0)));
          }
          return false;
      }
  
      public static boolean isContentUri(@Nullable Uri uri) {
          return uri != null && ContentResolver.SCHEME_CONTENT.equals(uri.getScheme());
      }
  
      /**
       * Test if the given URI represents a {@link Document} tree.
       *
       * @see #buildTreeDocumentUri(String, String)
       */
      public static boolean isTreeUri(Uri uri) {
          final List<String> paths = uri.getPathSegments();
          return (paths.size() >= 2 && PATH_TREE.equals(paths.get(0)));
      }
  
      @TargetApi(Build.VERSION_CODES.KITKAT)
      private static boolean isDocumentsProvider(Context context, String authority) {
          PackageManager pm = context.getPackageManager();
          if(Utils.hasKitKat()){
              final Intent intent = new Intent(DocumentsContract.PROVIDER_INTERFACE);
              final List<ResolveInfo> providers = pm.queryIntentContentProviders(intent, 0);
              for (ResolveInfo info : providers) {
                  if (authority.equals(info.providerInfo.authority)) {
                      return true;
                  }
              }
          }
          else{
              List<ProviderInfo> providers = context.getPackageManager()
                      .queryContentProviders(context.getPackageName(), context.getApplicationInfo().uid, 0);
              for (ProviderInfo providerInfo : providers) {
                  if (authority.equals(providerInfo.authority)) {
                      return true;
                  }
              }
          }
          return false;
      }
  
      /**
       * Extract the {@link Root#COLUMN_ROOT_ID} from the given URI.
       */
      public static String getRootId(Uri rootUri) {
          final List<String> paths = rootUri.getPathSegments();
          if (paths.size() >= 2 && PATH_ROOT.equals(paths.get(0))) {
              return paths.get(1);
          }
          throw new IllegalArgumentException("Invalid URI: " + rootUri);
      }
  
      /**
       * Extract the {@link dev.dworks.apps.anexplorer.model.DocumentsContract.Document#COLUMN_DOCUMENT_ID} from the given URI.
       *
       * @see #isDocumentUri(android.content.Context, android.net.Uri)
       */
      public static String getDocumentId(Uri documentUri) {
          final List<String> paths = documentUri.getPathSegments();
          if (paths.size() >= 2 && PATH_DOCUMENT.equals(paths.get(0))) {
              return paths.get(1);
          }
          if (paths.size() >= 4 && PATH_TREE.equals(paths.get(0))
                  && PATH_DOCUMENT.equals(paths.get(2))) {
              return paths.get(3);
          }
          throw new IllegalArgumentException("Invalid URI: " + documentUri);
      }
  
      /**
       * Extract the via {@link dev.dworks.apps.anexplorer.model.DocumentsContract.Document#COLUMN_DOCUMENT_ID} from the given URI.
       */
      public static String getTreeDocumentId(Uri documentUri) {
          final List<String> paths = documentUri.getPathSegments();
          if (paths.size() >= 2 && PATH_TREE.equals(paths.get(0))) {
              return paths.get(1);
          }
          throw new IllegalArgumentException("Invalid URI: " + documentUri);
      }
      /**
       * Extract the search query from a URI built by
       * {@link #buildSearchDocumentsUri(String, String, String)}.
       */
      public static String getSearchDocumentsQuery(Uri searchDocumentsUri) {
          return searchDocumentsUri.getQueryParameter(PARAM_QUERY);
      }
  
      public static Uri setManageMode(Uri uri) {
          return uri.buildUpon().appendQueryParameter(PARAM_MANAGE, "true").build();
      }
  
      public static boolean isManageMode(Uri uri) {
          return uri.getBooleanQueryParameter(PARAM_MANAGE, false);
      }
  
      /**
       * Return thumbnail representing the document at the given URI. Callers are
       * responsible for their own in-memory caching.
       *
       * @param documentUri document to return thumbnail for, which must have
       *            {@link Document#FLAG_SUPPORTS_THUMBNAIL} set.
       * @param size optimal thumbnail size desired. A provider may return a
       *            thumbnail of a different size, but never more than double the
       *            requested size.
       * @param signal signal used to indicate if caller is no longer interested
       *            in the thumbnail.
       * @return decoded thumbnail, or {@code null} if problem was encountered.
       * @see DocumentsProvider#openDocumentThumbnail(String, Point,
       *      CancellationSignal)
       */
      public static Bitmap getDocumentThumbnail(
              ContentResolver resolver, Uri documentUri, Point size, CancellationSignal signal) {
      	final ContentProviderClient client = ContentProviderClientCompat.acquireUnstableContentProviderClient(resolver, 
      			documentUri.getAuthority());
          try {
              if(UsbStorageProvider.AUTHORITY.equals(documentUri.getAuthority())) {
                  return ImageUtils.getThumbnail(resolver, documentUri, size.x, size.y);
              }
              return getDocumentThumbnails(client, documentUri, size, signal);
          } catch (Exception e) {
              if (!(e instanceof OperationCanceledException)) {
                  Log.w(TAG, "Failed to load thumbnail for " + documentUri + ": " + e);
              }
              return null;
          } finally {
          	ContentProviderClientCompat.releaseQuietly(client);
          }
      }
  
      public static Bitmap getDocumentThumbnails(
              ContentProviderClient client, Uri documentUri, Point size, CancellationSignal signal)
              throws RemoteException, IOException {
          final Bundle openOpts = new Bundle();
          openOpts.putParcelable(ContentResolver.EXTRA_SIZE, size);
  
          AssetFileDescriptor afd = null;
          Bitmap bitmap = null;
          try {
              // TODO : Remove
              // afd = client.openTypedAssetFileDescriptor(documentUri, "image/*", openOpts, signal);
              afd = client.openTypedAssetFileDescriptor(documentUri, "image/*", openOpts);
  
              final FileDescriptor fd = afd.getFileDescriptor();
              final long offset = afd.getStartOffset();
  
              // Try seeking on the returned FD, since it gives us the most
              // optimal decode path; otherwise fall back to buffering.
              BufferedInputStream is = null;
              try {
                  OsCompat.lseek(fd, offset, OsCompat.SEEK_SET);
              } catch (Exception e) {
                  is = new BufferedInputStream(new FileInputStream(fd), THUMBNAIL_BUFFER_SIZE);
                  is.mark(THUMBNAIL_BUFFER_SIZE);
              }
  
              // We requested a rough thumbnail size, but the remote size may have
              // returned something giant, so defensively scale down as needed.
              final BitmapFactory.Options opts = new BitmapFactory.Options();
              opts.inJustDecodeBounds = true;
              if (is != null) {
                  BitmapFactory.decodeStream(is, null, opts);
              } else {
                  BitmapFactory.decodeFileDescriptor(fd, null, opts);
              }
  
              final int widthSample = opts.outWidth / size.x;
              final int heightSample = opts.outHeight / size.y;
  
              opts.inJustDecodeBounds = false;
              opts.inSampleSize = Math.min(widthSample, heightSample);
              if (is != null) {
                  is.reset();
                  bitmap = BitmapFactory.decodeStream(is, null, opts);
              } else {
                  try {
                      OsCompat.lseek(fd, offset, OsCompat.SEEK_SET);
                  } catch (OsCompat.ExecutionFailedException e) {
                      throw new IOException(e);
                  }
                  bitmap = BitmapFactory.decodeFileDescriptor(fd, null, opts);
              }
  
              // Transform the bitmap if requested. We use a side-channel to
              // communicate the orientation, since EXIF thumbnails don't contain
              // the rotation flags of the original image.
              Bundle extras = null;
              if(Utils.hasKitKat()) {
                  extras = afd.getExtras();
              }
              final int orientation = (extras != null) ? extras.getInt(EXTRA_ORIENTATION, 0) : 0;
              if (orientation != 0) {
                  final int width = bitmap.getWidth();
                  final int height = bitmap.getHeight();
  
                  final Matrix m = new Matrix();
                  m.setRotate(orientation, width / 2, height / 2);
                  bitmap = Bitmap.createBitmap(bitmap, 0, 0, width, height, m, false);
              }
          } finally {
              IoUtils.closeQuietly(afd);
          }
  
          return bitmap;
      }
  
      /**
       * Create a new document with given MIME type and display name.
       *
       * @param parentDocumentUri directory with
       *            {@link DocumentsContract.Document#FLAG_DIR_SUPPORTS_CREATE}
       * @param mimeType MIME type of new document
       * @param displayName name of new document
       * @return newly created document, or {@code null} if failed
       */
      public static Uri createDocument(ContentResolver resolver, Uri parentDocumentUri,
                                       String mimeType, String displayName) {
          final ContentProviderClient client = resolver.acquireUnstableContentProviderClient(
                  parentDocumentUri.getAuthority());
          try {
              return createDocument(client, parentDocumentUri, mimeType, displayName);
          } catch (Exception e) {
              Log.w(TAG, "Failed to create document", e);
              return null;
          } finally {
              ContentProviderClientCompat.releaseQuietly(client);
          }
      }
  
      public static Uri createDocument(ContentProviderClient client, Uri parentDocumentUri,
                                       String mimeType, String displayName) throws Exception {
          final Bundle in = new Bundle();
          in.putParcelable(DocumentsContract.EXTRA_URI, parentDocumentUri);
          in.putString(DocumentsContract.Document.COLUMN_MIME_TYPE, mimeType);
          in.putString(DocumentsContract.Document.COLUMN_DISPLAY_NAME, displayName);
  
          final Bundle out = client.call(METHOD_CREATE_DOCUMENT, null, in);
          return out.getParcelable(DocumentsContract.EXTRA_URI);
      }
  
      public static boolean isChildDocument(ContentProviderClient client, Uri parentDocumentUri,
                                            Uri childDocumentUri) throws RemoteException {
  
          final Bundle in = new Bundle();
          in.putParcelable(DocumentsContract.EXTRA_URI, parentDocumentUri);
          in.putParcelable(DocumentsContract.EXTRA_TARGET_URI, childDocumentUri);
  
          final Bundle out = client.call(METHOD_IS_CHILD_DOCUMENT, null, in);
          if (out == null) {
              throw new RemoteException("Failed to get a reponse from isChildDocument query.");
          }
          if (!out.containsKey(DocumentsContract.EXTRA_RESULT)) {
              throw new RemoteException("Response did not include result field..");
          }
          return out.getBoolean(DocumentsContract.EXTRA_RESULT);
      }
  
      /**
       * Change the display name of an existing document.
       * <p>
       * If the underlying provider needs to create a new
       * {@link DocumentsContract.Document#COLUMN_DOCUMENT_ID} to represent the updated display
       * name, that new document is returned and the original document is no
       * longer valid. Otherwise, the original document is returned.
       *
       * @param documentUri document with {@link DocumentsContract.Document#FLAG_SUPPORTS_RENAME}
       * @param displayName updated name for document
       * @return the existing or new document after the rename, or {@code null} if
       *         failed.
       */
      public static Uri renameDocument(ContentResolver resolver, Uri documentUri,
                                       String displayName) {
          final ContentProviderClient client = resolver.acquireUnstableContentProviderClient(
                  documentUri.getAuthority());
          try {
              return renameDocument(client, documentUri, displayName);
          } catch (Exception e) {
              Log.w(TAG, "Failed to rename document", e);
              return null;
          } finally {
              ContentProviderClientCompat.releaseQuietly(client);
          }
      }
  
      public static Uri renameDocument(ContentProviderClient client, Uri documentUri,
                                       String displayName) throws RemoteException {
          final Bundle in = new Bundle();
          in.putParcelable(DocumentsContract.EXTRA_URI, documentUri);
          in.putString(DocumentsContract.Document.COLUMN_DISPLAY_NAME, displayName);
  
          final Bundle out = client.call(METHOD_RENAME_DOCUMENT, null, in);
          final Uri outUri = out.getParcelable(DocumentsContract.EXTRA_URI);
          return (outUri != null) ? outUri : documentUri;
      }
  
  
      /**
       * Delete the given document.
       *
       * @param documentUri document with {@link Document#FLAG_SUPPORTS_DELETE}
       * @return if the document was deleted successfully.
       */
      public static boolean deleteDocument(ContentResolver resolver, Uri documentUri) {
          final ContentProviderClient client = resolver.acquireUnstableContentProviderClient(
                  documentUri.getAuthority());
          try {
              deleteDocument(client, documentUri);
              return true;
          } catch (Exception e) {
              Log.w(TAG, "Failed to delete document", e);
              return false;
          } finally {
              ContentProviderClientCompat.releaseQuietly(client);
          }
      }
  
      public static void deleteDocument(ContentProviderClient client, Uri documentUri)
              throws RemoteException {
          final Bundle in = new Bundle();
          in.putParcelable(DocumentsContract.EXTRA_URI, documentUri);
  
          client.call(METHOD_DELETE_DOCUMENT, null, in);
      }
  
      /**
       * Copies the given document.
       *
       * @param sourceDocumentUri document with {@link DocumentsContract.Document#FLAG_SUPPORTS_COPY}
       * @param targetParentDocumentUri document which will become a parent of the source
       *         document's copy.
       * @return the copied document, or {@code null} if failed.
       */
      public static Uri copyDocument(ContentResolver resolver, Uri sourceDocumentUri,
                                     Uri targetParentDocumentUri) {
          final ContentProviderClient client = resolver.acquireUnstableContentProviderClient(
                  sourceDocumentUri.getAuthority());
          try {
              return copyDocument(client, sourceDocumentUri, targetParentDocumentUri);
          } catch (Exception e) {
              Log.w(TAG, "Failed to copy document", e);
              return null;
          } finally {
              ContentProviderClientCompat.releaseQuietly(client);
          }
      }
  
      public static Uri copyDocument(ContentProviderClient client, Uri sourceDocumentUri,
                                     Uri targetParentDocumentUri) throws RemoteException {
          final Bundle in = new Bundle();
          in.putParcelable(DocumentsContract.EXTRA_URI, sourceDocumentUri);
          in.putParcelable(DocumentsContract.EXTRA_TARGET_URI, targetParentDocumentUri);
  
          final Bundle out = client.call(METHOD_COPY_DOCUMENT, null, in);
          return out.getParcelable(DocumentsContract.EXTRA_URI);
      }
  
          /**
       * Moves the given document under a new parent.
       *
       * @param sourceDocumentUri document with {@link Document#FLAG_SUPPORTS_MOVE}
       * @param sourceParentDocumentUri parent document of the document to move.
       * @param targetParentDocumentUri document which will become a new parent of the source
       *         document.
       * @return the moved document, or {@code null} if failed.
       */
      public static Uri moveDocument(ContentResolver resolver, Uri sourceDocumentUri,
              Uri sourceParentDocumentUri, Uri targetParentDocumentUri) {
          final ContentProviderClient client = resolver.acquireUnstableContentProviderClient(
                  sourceDocumentUri.getAuthority());
          try {
              return moveDocument(client, sourceDocumentUri, sourceParentDocumentUri,
                      targetParentDocumentUri);
          } catch (Exception e) {
              Log.w(TAG, "Failed to move document", e);
              return null;
          } finally {
              ContentProviderClientCompat.releaseQuietly(client);
          }
      }
  
      public static Uri moveDocument(ContentProviderClient client, Uri sourceDocumentUri,
              Uri sourceParentDocumentUri, Uri targetParentDocumentUri) throws RemoteException {
          final Bundle in = new Bundle();
          in.putParcelable(DocumentsContract.EXTRA_URI, sourceDocumentUri);
          in.putParcelable(DocumentsContract.EXTRA_PARENT_URI, sourceParentDocumentUri);
          in.putParcelable(DocumentsContract.EXTRA_TARGET_URI, targetParentDocumentUri);
  
          final Bundle out = client.call(METHOD_MOVE_DOCUMENT, null, in);
          return out.getParcelable(DocumentsContract.EXTRA_URI);
      }
  
      /**
       * Removes the given document from a parent directory.
       *
       * <p>In contrast to {@link #deleteDocument} it requires specifying the parent.
       * This method is especially useful if the document can be in multiple parents.
       *
       * @param documentUri document with {@link Document#FLAG_SUPPORTS_REMOVE}
       * @param parentDocumentUri parent document of the document to remove.
       * @return true if the document was removed successfully.
       */
      public static boolean removeDocument(ContentResolver resolver, Uri documentUri,
              Uri parentDocumentUri) {
          final ContentProviderClient client = resolver.acquireUnstableContentProviderClient(
                  documentUri.getAuthority());
          try {
              removeDocument(client, documentUri, parentDocumentUri);
              return true;
          } catch (Exception e) {
              Log.w(TAG, "Failed to remove document", e);
              return false;
          } finally {
              ContentProviderClientCompat.releaseQuietly(client);
          }
      }
  
      public static void removeDocument(ContentProviderClient client, Uri documentUri,
              Uri parentDocumentUri) throws RemoteException {
          final Bundle in = new Bundle();
          in.putParcelable(DocumentsContract.EXTRA_URI, documentUri);
          in.putParcelable(DocumentsContract.EXTRA_PARENT_URI, parentDocumentUri);
  
          client.call(METHOD_REMOVE_DOCUMENT, null, in);
      }
  
      public static boolean compressDocument(ContentResolver resolver, Uri fromDocumentUri, ArrayList<String> fromDocumentIds) {
          final ContentProviderClient client = resolver.acquireUnstableContentProviderClient(
                  fromDocumentUri.getAuthority());
          try {
              final Bundle in = new Bundle();
              in.putString(Document.COLUMN_DOCUMENT_ID, getDocumentId(fromDocumentUri));
              in.putParcelable(DocumentsContract.EXTRA_URI, fromDocumentUri);
              in.putStringArrayList(DocumentsContract.EXTRA_DOCUMENTS_COMPRESS, fromDocumentIds);
              resolver.call(fromDocumentUri, METHOD_COMPRESS_DOCUMENT, null, in);
              return true;
          } catch (Exception e) {
              Log.w(TAG, "Failed to compress document", e);
              return false;
          } finally {
              ContentProviderClientCompat.releaseQuietly(client);
          }
      }
  
      public static boolean uncompressDocument(ContentResolver resolver, Uri fromDocumentUri) {
          final ContentProviderClient client = resolver.acquireUnstableContentProviderClient(
                  fromDocumentUri.getAuthority());
          try {
              final Bundle in = new Bundle();
              in.putString(Document.COLUMN_DOCUMENT_ID, getDocumentId(fromDocumentUri));
              in.putParcelable(DocumentsContract.EXTRA_URI, fromDocumentUri);
  
              resolver.call(fromDocumentUri, METHOD_UNCOMPRESS_DOCUMENT, null, in);
              return true;
          } catch (Exception e) {
              Log.w(TAG, "Failed to uncompress document", e);
              return false;
          } finally {
              ContentProviderClientCompat.releaseQuietly(client);
          }
      }
  
      public static boolean uploadDocument(ContentResolver resolver, Uri parentDocumentUri,
                                           Uri uploadDocumentUri, String mimeType, String displayName) {
          final ContentProviderClient client = resolver.acquireUnstableContentProviderClient(
                  parentDocumentUri.getAuthority());
          try {
              final Bundle in = new Bundle();
              in.putParcelable(DocumentsContract.EXTRA_URI, parentDocumentUri);
              in.putParcelable(DocumentsContract.EXTRA_UPLOAD_URI, uploadDocumentUri);
              in.putString(DocumentsContract.Document.COLUMN_MIME_TYPE, mimeType);
              in.putString(DocumentsContract.Document.COLUMN_DISPLAY_NAME, displayName);
  
              resolver.call(parentDocumentUri, METHOD_UPLOAD_DOCUMENT, null, in);
              return true;
          } catch (Exception e) {
              Log.w(TAG, "Failed to uncompress document", e);
              return false;
          } finally {
              ContentProviderClientCompat.releaseQuietly(client);
          }
      }
  
      /**
       * Open the given image for thumbnail purposes, using any embedded EXIF
       * thumbnail if available, and providing orientation hints from the parent
       * image.
       *
       * @hide
       */
      @TargetApi(Build.VERSION_CODES.KITKAT)
      public static AssetFileDescriptor openImageThumbnail(File file) throws FileNotFoundException {
          final ParcelFileDescriptor pfd = ParcelFileDescriptor.open(
                  file, ParcelFileDescriptor.MODE_READ_ONLY);
          Bundle extras = null;
          if(!Utils.hasKitKat()) {
              return new AssetFileDescriptor(pfd, 0, AssetFileDescriptor.UNKNOWN_LENGTH);
          }
          try {
              final ExifInterface exif = new ExifInterface(file.getAbsolutePath());
  
              switch (exif.getAttributeInt(ExifInterface.TAG_ORIENTATION, -1)) {
                  case ExifInterface.ORIENTATION_ROTATE_90:
                      extras = new Bundle(1);
                      extras.putInt(EXTRA_ORIENTATION, 90);
                      break;
                  case ExifInterface.ORIENTATION_ROTATE_180:
                      extras = new Bundle(1);
                      extras.putInt(EXTRA_ORIENTATION, 180);
                      break;
                  case ExifInterface.ORIENTATION_ROTATE_270:
                      extras = new Bundle(1);
                      extras.putInt(EXTRA_ORIENTATION, 270);
                      break;
              }
  
              final long[] thumb = exif.getThumbnailRange();
              if (thumb != null) {
                  return new AssetFileDescriptor(pfd, thumb[0], thumb[1], extras);
              }
          } catch (IOException e) {
              CrashReportingManager.logException(e);
          }
  
          return new AssetFileDescriptor(pfd, 0, AssetFileDescriptor.UNKNOWN_LENGTH, extras);
      }
  }
  