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A library jar that provides APIs for Applications written for the Google Android Platform.
/*
* Copyright (C) 2010 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 android.mtp;
import android.content.Context;
import android.content.ContentValues;
import android.content.IContentProvider;
import android.content.Intent;
import android.content.SharedPreferences;
import android.database.Cursor;
import android.database.sqlite.SQLiteDatabase;
import android.media.MediaScanner;
import android.net.Uri;
import android.os.Environment;
import android.os.RemoteException;
import android.provider.MediaStore;
import android.provider.MediaStore.Audio;
import android.provider.MediaStore.Files;
import android.provider.MediaStore.Images;
import android.provider.MediaStore.MediaColumns;
import android.util.Log;
import android.view.Display;
import android.view.WindowManager;
import java.io.File;
import java.util.HashMap;
import java.util.Locale;
/**
* {@hide}
*/
public class MtpDatabase {
private static final String TAG = "MtpDatabase";
private final Context mContext;
private final String mPackageName;
private final IContentProvider mMediaProvider;
private final String mVolumeName;
private final Uri mObjectsUri;
// path to primary storage
private final String mMediaStoragePath;
// if not null, restrict all queries to these subdirectories
private final String[] mSubDirectories;
// where clause for restricting queries to files in mSubDirectories
private String mSubDirectoriesWhere;
// where arguments for restricting queries to files in mSubDirectories
private String[] mSubDirectoriesWhereArgs;
private final HashMap mStorageMap = new HashMap();
// cached property groups for single properties
private final HashMap mPropertyGroupsByProperty
= new HashMap();
// cached property groups for all properties for a given format
private final HashMap mPropertyGroupsByFormat
= new HashMap();
// true if the database has been modified in the current MTP session
private boolean mDatabaseModified;
// SharedPreferences for writable MTP device properties
private SharedPreferences mDeviceProperties;
private static final int DEVICE_PROPERTIES_DATABASE_VERSION = 1;
private static final String[] ID_PROJECTION = new String[] {
Files.FileColumns._ID, // 0
};
private static final String[] PATH_PROJECTION = new String[] {
Files.FileColumns._ID, // 0
Files.FileColumns.DATA, // 1
};
private static final String[] PATH_FORMAT_PROJECTION = new String[] {
Files.FileColumns._ID, // 0
Files.FileColumns.DATA, // 1
Files.FileColumns.FORMAT, // 2
};
private static final String[] OBJECT_INFO_PROJECTION = new String[] {
Files.FileColumns._ID, // 0
Files.FileColumns.STORAGE_ID, // 1
Files.FileColumns.FORMAT, // 2
Files.FileColumns.PARENT, // 3
Files.FileColumns.DATA, // 4
Files.FileColumns.DATE_ADDED, // 5
Files.FileColumns.DATE_MODIFIED, // 6
};
private static final String ID_WHERE = Files.FileColumns._ID + "=?";
private static final String PATH_WHERE = Files.FileColumns.DATA + "=?";
private static final String STORAGE_WHERE = Files.FileColumns.STORAGE_ID + "=?";
private static final String FORMAT_WHERE = Files.FileColumns.FORMAT + "=?";
private static final String PARENT_WHERE = Files.FileColumns.PARENT + "=?";
private static final String STORAGE_FORMAT_WHERE = STORAGE_WHERE + " AND "
+ Files.FileColumns.FORMAT + "=?";
private static final String STORAGE_PARENT_WHERE = STORAGE_WHERE + " AND "
+ Files.FileColumns.PARENT + "=?";
private static final String FORMAT_PARENT_WHERE = FORMAT_WHERE + " AND "
+ Files.FileColumns.PARENT + "=?";
private static final String STORAGE_FORMAT_PARENT_WHERE = STORAGE_FORMAT_WHERE + " AND "
+ Files.FileColumns.PARENT + "=?";
private final MediaScanner mMediaScanner;
static {
System.loadLibrary("media_jni");
}
public MtpDatabase(Context context, String volumeName, String storagePath,
String[] subDirectories) {
native_setup();
mContext = context;
mPackageName = context.getPackageName();
mMediaProvider = context.getContentResolver().acquireProvider("media");
mVolumeName = volumeName;
mMediaStoragePath = storagePath;
mObjectsUri = Files.getMtpObjectsUri(volumeName);
mMediaScanner = new MediaScanner(context);
mSubDirectories = subDirectories;
if (subDirectories != null) {
// Compute "where" string for restricting queries to subdirectories
StringBuilder builder = new StringBuilder();
builder.append("(");
int count = subDirectories.length;
for (int i = 0; i < count; i++) {
builder.append(Files.FileColumns.DATA + "=? OR "
+ Files.FileColumns.DATA + " LIKE ?");
if (i != count - 1) {
builder.append(" OR ");
}
}
builder.append(")");
mSubDirectoriesWhere = builder.toString();
// Compute "where" arguments for restricting queries to subdirectories
mSubDirectoriesWhereArgs = new String[count * 2];
for (int i = 0, j = 0; i < count; i++) {
String path = subDirectories[i];
mSubDirectoriesWhereArgs[j++] = path;
mSubDirectoriesWhereArgs[j++] = path + "/%";
}
}
// Set locale to MediaScanner.
Locale locale = context.getResources().getConfiguration().locale;
if (locale != null) {
String language = locale.getLanguage();
String country = locale.getCountry();
if (language != null) {
if (country != null) {
mMediaScanner.setLocale(language + "_" + country);
} else {
mMediaScanner.setLocale(language);
}
}
}
initDeviceProperties(context);
}
@Override
protected void finalize() throws Throwable {
try {
native_finalize();
} finally {
super.finalize();
}
}
public void addStorage(MtpStorage storage) {
mStorageMap.put(storage.getPath(), storage);
}
public void removeStorage(MtpStorage storage) {
mStorageMap.remove(storage.getPath());
}
private void initDeviceProperties(Context context) {
final String devicePropertiesName = "device-properties";
mDeviceProperties = context.getSharedPreferences(devicePropertiesName, Context.MODE_PRIVATE);
File databaseFile = context.getDatabasePath(devicePropertiesName);
if (databaseFile.exists()) {
// for backward compatibility - read device properties from sqlite database
// and migrate them to shared prefs
SQLiteDatabase db = null;
Cursor c = null;
try {
db = context.openOrCreateDatabase("device-properties", Context.MODE_PRIVATE, null);
if (db != null) {
c = db.query("properties", new String[] { "_id", "code", "value" },
null, null, null, null, null);
if (c != null) {
SharedPreferences.Editor e = mDeviceProperties.edit();
while (c.moveToNext()) {
String name = c.getString(1);
String value = c.getString(2);
e.putString(name, value);
}
e.commit();
}
}
} catch (Exception e) {
Log.e(TAG, "failed to migrate device properties", e);
} finally {
if (c != null) c.close();
if (db != null) db.close();
}
context.deleteDatabase(devicePropertiesName);
}
}
// check to see if the path is contained in one of our storage subdirectories
// returns true if we have no special subdirectories
private boolean inStorageSubDirectory(String path) {
if (mSubDirectories == null) return true;
if (path == null) return false;
boolean allowed = false;
int pathLength = path.length();
for (int i = 0; i < mSubDirectories.length && !allowed; i++) {
String subdir = mSubDirectories[i];
int subdirLength = subdir.length();
if (subdirLength < pathLength &&
path.charAt(subdirLength) == '/' &&
path.startsWith(subdir)) {
allowed = true;
}
}
return allowed;
}
// check to see if the path matches one of our storage subdirectories
// returns true if we have no special subdirectories
private boolean isStorageSubDirectory(String path) {
if (mSubDirectories == null) return false;
for (int i = 0; i < mSubDirectories.length; i++) {
if (path.equals(mSubDirectories[i])) {
return true;
}
}
return false;
}
private int beginSendObject(String path, int format, int parent,
int storageId, long size, long modified) {
// if mSubDirectories is not null, do not allow copying files to any other locations
if (!inStorageSubDirectory(path)) return -1;
// make sure the object does not exist
if (path != null) {
Cursor c = null;
try {
c = mMediaProvider.query(mPackageName, mObjectsUri, ID_PROJECTION, PATH_WHERE,
new String[] { path }, null, null);
if (c != null && c.getCount() > 0) {
Log.w(TAG, "file already exists in beginSendObject: " + path);
return -1;
}
} catch (RemoteException e) {
Log.e(TAG, "RemoteException in beginSendObject", e);
} finally {
if (c != null) {
c.close();
}
}
}
mDatabaseModified = true;
ContentValues values = new ContentValues();
values.put(Files.FileColumns.DATA, path);
values.put(Files.FileColumns.FORMAT, format);
values.put(Files.FileColumns.PARENT, parent);
values.put(Files.FileColumns.STORAGE_ID, storageId);
values.put(Files.FileColumns.SIZE, size);
values.put(Files.FileColumns.DATE_MODIFIED, modified);
try {
Uri uri = mMediaProvider.insert(mPackageName, mObjectsUri, values);
if (uri != null) {
return Integer.parseInt(uri.getPathSegments().get(2));
} else {
return -1;
}
} catch (RemoteException e) {
Log.e(TAG, "RemoteException in beginSendObject", e);
return -1;
}
}
private void endSendObject(String path, int handle, int format, boolean succeeded) {
if (succeeded) {
// handle abstract playlists separately
// they do not exist in the file system so don't use the media scanner here
if (format == MtpConstants.FORMAT_ABSTRACT_AV_PLAYLIST) {
// extract name from path
String name = path;
int lastSlash = name.lastIndexOf('/');
if (lastSlash >= 0) {
name = name.substring(lastSlash + 1);
}
// strip trailing ".pla" from the name
if (name.endsWith(".pla")) {
name = name.substring(0, name.length() - 4);
}
ContentValues values = new ContentValues(1);
values.put(Audio.Playlists.DATA, path);
values.put(Audio.Playlists.NAME, name);
values.put(Files.FileColumns.FORMAT, format);
values.put(Files.FileColumns.DATE_MODIFIED, System.currentTimeMillis() / 1000);
values.put(MediaColumns.MEDIA_SCANNER_NEW_OBJECT_ID, handle);
try {
Uri uri = mMediaProvider.insert(mPackageName,
Audio.Playlists.EXTERNAL_CONTENT_URI, values);
} catch (RemoteException e) {
Log.e(TAG, "RemoteException in endSendObject", e);
}
} else {
mMediaScanner.scanMtpFile(path, mVolumeName, handle, format);
}
} else {
deleteFile(handle);
}
}
private Cursor createObjectQuery(int storageID, int format, int parent) throws RemoteException {
String where;
String[] whereArgs;
if (storageID == 0xFFFFFFFF) {
// query all stores
if (format == 0) {
// query all formats
if (parent == 0) {
// query all objects
where = null;
whereArgs = null;
} else {
if (parent == 0xFFFFFFFF) {
// all objects in root of store
parent = 0;
}
where = PARENT_WHERE;
whereArgs = new String[] { Integer.toString(parent) };
}
} else {
// query specific format
if (parent == 0) {
// query all objects
where = FORMAT_WHERE;
whereArgs = new String[] { Integer.toString(format) };
} else {
if (parent == 0xFFFFFFFF) {
// all objects in root of store
parent = 0;
}
where = FORMAT_PARENT_WHERE;
whereArgs = new String[] { Integer.toString(format),
Integer.toString(parent) };
}
}
} else {
// query specific store
if (format == 0) {
// query all formats
if (parent == 0) {
// query all objects
where = STORAGE_WHERE;
whereArgs = new String[] { Integer.toString(storageID) };
} else {
if (parent == 0xFFFFFFFF) {
// all objects in root of store
parent = 0;
}
where = STORAGE_PARENT_WHERE;
whereArgs = new String[] { Integer.toString(storageID),
Integer.toString(parent) };
}
} else {
// query specific format
if (parent == 0) {
// query all objects
where = STORAGE_FORMAT_WHERE;
whereArgs = new String[] { Integer.toString(storageID),
Integer.toString(format) };
} else {
if (parent == 0xFFFFFFFF) {
// all objects in root of store
parent = 0;
}
where = STORAGE_FORMAT_PARENT_WHERE;
whereArgs = new String[] { Integer.toString(storageID),
Integer.toString(format),
Integer.toString(parent) };
}
}
}
// if we are restricting queries to mSubDirectories, we need to add the restriction
// onto our "where" arguments
if (mSubDirectoriesWhere != null) {
if (where == null) {
where = mSubDirectoriesWhere;
whereArgs = mSubDirectoriesWhereArgs;
} else {
where = where + " AND " + mSubDirectoriesWhere;
// create new array to hold whereArgs and mSubDirectoriesWhereArgs
String[] newWhereArgs =
new String[whereArgs.length + mSubDirectoriesWhereArgs.length];
int i, j;
for (i = 0; i < whereArgs.length; i++) {
newWhereArgs[i] = whereArgs[i];
}
for (j = 0; j < mSubDirectoriesWhereArgs.length; i++, j++) {
newWhereArgs[i] = mSubDirectoriesWhereArgs[j];
}
whereArgs = newWhereArgs;
}
}
return mMediaProvider.query(mPackageName, mObjectsUri, ID_PROJECTION, where,
whereArgs, null, null);
}
private int[] getObjectList(int storageID, int format, int parent) {
Cursor c = null;
try {
c = createObjectQuery(storageID, format, parent);
if (c == null) {
return null;
}
int count = c.getCount();
if (count > 0) {
int[] result = new int[count];
for (int i = 0; i < count; i++) {
c.moveToNext();
result[i] = c.getInt(0);
}
return result;
}
} catch (RemoteException e) {
Log.e(TAG, "RemoteException in getObjectList", e);
} finally {
if (c != null) {
c.close();
}
}
return null;
}
private int getNumObjects(int storageID, int format, int parent) {
Cursor c = null;
try {
c = createObjectQuery(storageID, format, parent);
if (c != null) {
return c.getCount();
}
} catch (RemoteException e) {
Log.e(TAG, "RemoteException in getNumObjects", e);
} finally {
if (c != null) {
c.close();
}
}
return -1;
}
private int[] getSupportedPlaybackFormats() {
return new int[] {
// allow transfering arbitrary files
MtpConstants.FORMAT_UNDEFINED,
MtpConstants.FORMAT_ASSOCIATION,
MtpConstants.FORMAT_TEXT,
MtpConstants.FORMAT_HTML,
MtpConstants.FORMAT_WAV,
MtpConstants.FORMAT_MP3,
MtpConstants.FORMAT_MPEG,
MtpConstants.FORMAT_EXIF_JPEG,
MtpConstants.FORMAT_TIFF_EP,
MtpConstants.FORMAT_BMP,
MtpConstants.FORMAT_GIF,
MtpConstants.FORMAT_JFIF,
MtpConstants.FORMAT_PNG,
MtpConstants.FORMAT_TIFF,
MtpConstants.FORMAT_WMA,
MtpConstants.FORMAT_OGG,
MtpConstants.FORMAT_AAC,
MtpConstants.FORMAT_MP4_CONTAINER,
MtpConstants.FORMAT_MP2,
MtpConstants.FORMAT_3GP_CONTAINER,
MtpConstants.FORMAT_ABSTRACT_AV_PLAYLIST,
MtpConstants.FORMAT_WPL_PLAYLIST,
MtpConstants.FORMAT_M3U_PLAYLIST,
MtpConstants.FORMAT_PLS_PLAYLIST,
MtpConstants.FORMAT_XML_DOCUMENT,
MtpConstants.FORMAT_FLAC,
};
}
private int[] getSupportedCaptureFormats() {
// no capture formats yet
return null;
}
static final int[] FILE_PROPERTIES = {
// NOTE must match beginning of AUDIO_PROPERTIES, VIDEO_PROPERTIES
// and IMAGE_PROPERTIES below
MtpConstants.PROPERTY_STORAGE_ID,
MtpConstants.PROPERTY_OBJECT_FORMAT,
MtpConstants.PROPERTY_PROTECTION_STATUS,
MtpConstants.PROPERTY_OBJECT_SIZE,
MtpConstants.PROPERTY_OBJECT_FILE_NAME,
MtpConstants.PROPERTY_DATE_MODIFIED,
MtpConstants.PROPERTY_PARENT_OBJECT,
MtpConstants.PROPERTY_PERSISTENT_UID,
MtpConstants.PROPERTY_NAME,
MtpConstants.PROPERTY_DATE_ADDED,
};
static final int[] AUDIO_PROPERTIES = {
// NOTE must match FILE_PROPERTIES above
MtpConstants.PROPERTY_STORAGE_ID,
MtpConstants.PROPERTY_OBJECT_FORMAT,
MtpConstants.PROPERTY_PROTECTION_STATUS,
MtpConstants.PROPERTY_OBJECT_SIZE,
MtpConstants.PROPERTY_OBJECT_FILE_NAME,
MtpConstants.PROPERTY_DATE_MODIFIED,
MtpConstants.PROPERTY_PARENT_OBJECT,
MtpConstants.PROPERTY_PERSISTENT_UID,
MtpConstants.PROPERTY_NAME,
MtpConstants.PROPERTY_DISPLAY_NAME,
MtpConstants.PROPERTY_DATE_ADDED,
// audio specific properties
MtpConstants.PROPERTY_ARTIST,
MtpConstants.PROPERTY_ALBUM_NAME,
MtpConstants.PROPERTY_ALBUM_ARTIST,
MtpConstants.PROPERTY_TRACK,
MtpConstants.PROPERTY_ORIGINAL_RELEASE_DATE,
MtpConstants.PROPERTY_DURATION,
MtpConstants.PROPERTY_GENRE,
MtpConstants.PROPERTY_COMPOSER,
};
static final int[] VIDEO_PROPERTIES = {
// NOTE must match FILE_PROPERTIES above
MtpConstants.PROPERTY_STORAGE_ID,
MtpConstants.PROPERTY_OBJECT_FORMAT,
MtpConstants.PROPERTY_PROTECTION_STATUS,
MtpConstants.PROPERTY_OBJECT_SIZE,
MtpConstants.PROPERTY_OBJECT_FILE_NAME,
MtpConstants.PROPERTY_DATE_MODIFIED,
MtpConstants.PROPERTY_PARENT_OBJECT,
MtpConstants.PROPERTY_PERSISTENT_UID,
MtpConstants.PROPERTY_NAME,
MtpConstants.PROPERTY_DISPLAY_NAME,
MtpConstants.PROPERTY_DATE_ADDED,
// video specific properties
MtpConstants.PROPERTY_ARTIST,
MtpConstants.PROPERTY_ALBUM_NAME,
MtpConstants.PROPERTY_DURATION,
MtpConstants.PROPERTY_DESCRIPTION,
};
static final int[] IMAGE_PROPERTIES = {
// NOTE must match FILE_PROPERTIES above
MtpConstants.PROPERTY_STORAGE_ID,
MtpConstants.PROPERTY_OBJECT_FORMAT,
MtpConstants.PROPERTY_PROTECTION_STATUS,
MtpConstants.PROPERTY_OBJECT_SIZE,
MtpConstants.PROPERTY_OBJECT_FILE_NAME,
MtpConstants.PROPERTY_DATE_MODIFIED,
MtpConstants.PROPERTY_PARENT_OBJECT,
MtpConstants.PROPERTY_PERSISTENT_UID,
MtpConstants.PROPERTY_NAME,
MtpConstants.PROPERTY_DISPLAY_NAME,
MtpConstants.PROPERTY_DATE_ADDED,
// image specific properties
MtpConstants.PROPERTY_DESCRIPTION,
};
static final int[] ALL_PROPERTIES = {
// NOTE must match FILE_PROPERTIES above
MtpConstants.PROPERTY_STORAGE_ID,
MtpConstants.PROPERTY_OBJECT_FORMAT,
MtpConstants.PROPERTY_PROTECTION_STATUS,
MtpConstants.PROPERTY_OBJECT_SIZE,
MtpConstants.PROPERTY_OBJECT_FILE_NAME,
MtpConstants.PROPERTY_DATE_MODIFIED,
MtpConstants.PROPERTY_PARENT_OBJECT,
MtpConstants.PROPERTY_PERSISTENT_UID,
MtpConstants.PROPERTY_NAME,
MtpConstants.PROPERTY_DISPLAY_NAME,
MtpConstants.PROPERTY_DATE_ADDED,
// image specific properties
MtpConstants.PROPERTY_DESCRIPTION,
// audio specific properties
MtpConstants.PROPERTY_ARTIST,
MtpConstants.PROPERTY_ALBUM_NAME,
MtpConstants.PROPERTY_ALBUM_ARTIST,
MtpConstants.PROPERTY_TRACK,
MtpConstants.PROPERTY_ORIGINAL_RELEASE_DATE,
MtpConstants.PROPERTY_DURATION,
MtpConstants.PROPERTY_GENRE,
MtpConstants.PROPERTY_COMPOSER,
// video specific properties
MtpConstants.PROPERTY_ARTIST,
MtpConstants.PROPERTY_ALBUM_NAME,
MtpConstants.PROPERTY_DURATION,
MtpConstants.PROPERTY_DESCRIPTION,
// image specific properties
MtpConstants.PROPERTY_DESCRIPTION,
};
private int[] getSupportedObjectProperties(int format) {
switch (format) {
case MtpConstants.FORMAT_MP3:
case MtpConstants.FORMAT_WAV:
case MtpConstants.FORMAT_WMA:
case MtpConstants.FORMAT_OGG:
case MtpConstants.FORMAT_AAC:
return AUDIO_PROPERTIES;
case MtpConstants.FORMAT_MPEG:
case MtpConstants.FORMAT_3GP_CONTAINER:
case MtpConstants.FORMAT_WMV:
return VIDEO_PROPERTIES;
case MtpConstants.FORMAT_EXIF_JPEG:
case MtpConstants.FORMAT_GIF:
case MtpConstants.FORMAT_PNG:
case MtpConstants.FORMAT_BMP:
return IMAGE_PROPERTIES;
case 0:
return ALL_PROPERTIES;
default:
return FILE_PROPERTIES;
}
}
private int[] getSupportedDeviceProperties() {
return new int[] {
MtpConstants.DEVICE_PROPERTY_SYNCHRONIZATION_PARTNER,
MtpConstants.DEVICE_PROPERTY_DEVICE_FRIENDLY_NAME,
MtpConstants.DEVICE_PROPERTY_IMAGE_SIZE,
};
}
private MtpPropertyList getObjectPropertyList(long handle, int format, long property,
int groupCode, int depth) {
// FIXME - implement group support
if (groupCode != 0) {
return new MtpPropertyList(0, MtpConstants.RESPONSE_SPECIFICATION_BY_GROUP_UNSUPPORTED);
}
MtpPropertyGroup propertyGroup;
if (property == 0xFFFFFFFFL) {
propertyGroup = mPropertyGroupsByFormat.get(format);
if (propertyGroup == null) {
int[] propertyList = getSupportedObjectProperties(format);
propertyGroup = new MtpPropertyGroup(this, mMediaProvider, mPackageName,
mVolumeName, propertyList);
mPropertyGroupsByFormat.put(new Integer(format), propertyGroup);
}
} else {
propertyGroup = mPropertyGroupsByProperty.get(property);
if (propertyGroup == null) {
int[] propertyList = new int[] { (int)property };
propertyGroup = new MtpPropertyGroup(this, mMediaProvider, mPackageName,
mVolumeName, propertyList);
mPropertyGroupsByProperty.put(new Integer((int)property), propertyGroup);
}
}
return propertyGroup.getPropertyList((int)handle, format, depth);
}
private int renameFile(int handle, String newName) {
Cursor c = null;
// first compute current path
String path = null;
String[] whereArgs = new String[] { Integer.toString(handle) };
try {
c = mMediaProvider.query(mPackageName, mObjectsUri, PATH_PROJECTION, ID_WHERE,
whereArgs, null, null);
if (c != null && c.moveToNext()) {
path = c.getString(1);
}
} catch (RemoteException e) {
Log.e(TAG, "RemoteException in getObjectFilePath", e);
return MtpConstants.RESPONSE_GENERAL_ERROR;
} finally {
if (c != null) {
c.close();
}
}
if (path == null) {
return MtpConstants.RESPONSE_INVALID_OBJECT_HANDLE;
}
// do not allow renaming any of the special subdirectories
if (isStorageSubDirectory(path)) {
return MtpConstants.RESPONSE_OBJECT_WRITE_PROTECTED;
}
// now rename the file. make sure this succeeds before updating database
File oldFile = new File(path);
int lastSlash = path.lastIndexOf('/');
if (lastSlash <= 1) {
return MtpConstants.RESPONSE_GENERAL_ERROR;
}
String newPath = path.substring(0, lastSlash + 1) + newName;
File newFile = new File(newPath);
boolean success = oldFile.renameTo(newFile);
if (!success) {
Log.w(TAG, "renaming "+ path + " to " + newPath + " failed");
return MtpConstants.RESPONSE_GENERAL_ERROR;
}
// finally update database
ContentValues values = new ContentValues();
values.put(Files.FileColumns.DATA, newPath);
int updated = 0;
try {
// note - we are relying on a special case in MediaProvider.update() to update
// the paths for all children in the case where this is a directory.
updated = mMediaProvider.update(mPackageName, mObjectsUri, values, ID_WHERE, whereArgs);
} catch (RemoteException e) {
Log.e(TAG, "RemoteException in mMediaProvider.update", e);
}
if (updated == 0) {
Log.e(TAG, "Unable to update path for " + path + " to " + newPath);
// this shouldn't happen, but if it does we need to rename the file to its original name
newFile.renameTo(oldFile);
return MtpConstants.RESPONSE_GENERAL_ERROR;
}
// check if nomedia status changed
if (newFile.isDirectory()) {
// for directories, check if renamed from something hidden to something non-hidden
if (oldFile.getName().startsWith(".") && !newPath.startsWith(".")) {
// directory was unhidden
try {
mMediaProvider.call(mPackageName, MediaStore.UNHIDE_CALL, newPath, null);
} catch (RemoteException e) {
Log.e(TAG, "failed to unhide/rescan for " + newPath);
}
}
} else {
// for files, check if renamed from .nomedia to something else
if (oldFile.getName().toLowerCase(Locale.US).equals(".nomedia")
&& !newPath.toLowerCase(Locale.US).equals(".nomedia")) {
try {
mMediaProvider.call(mPackageName, MediaStore.UNHIDE_CALL, oldFile.getParent(), null);
} catch (RemoteException e) {
Log.e(TAG, "failed to unhide/rescan for " + newPath);
}
}
}
return MtpConstants.RESPONSE_OK;
}
private int setObjectProperty(int handle, int property,
long intValue, String stringValue) {
switch (property) {
case MtpConstants.PROPERTY_OBJECT_FILE_NAME:
return renameFile(handle, stringValue);
default:
return MtpConstants.RESPONSE_OBJECT_PROP_NOT_SUPPORTED;
}
}
private int getDeviceProperty(int property, long[] outIntValue, char[] outStringValue) {
switch (property) {
case MtpConstants.DEVICE_PROPERTY_SYNCHRONIZATION_PARTNER:
case MtpConstants.DEVICE_PROPERTY_DEVICE_FRIENDLY_NAME:
// writable string properties kept in shared preferences
String value = mDeviceProperties.getString(Integer.toString(property), "");
int length = value.length();
if (length > 255) {
length = 255;
}
value.getChars(0, length, outStringValue, 0);
outStringValue[length] = 0;
return MtpConstants.RESPONSE_OK;
case MtpConstants.DEVICE_PROPERTY_IMAGE_SIZE:
// use screen size as max image size
Display display = ((WindowManager)mContext.getSystemService(
Context.WINDOW_SERVICE)).getDefaultDisplay();
int width = display.getMaximumSizeDimension();
int height = display.getMaximumSizeDimension();
String imageSize = Integer.toString(width) + "x" + Integer.toString(height);
imageSize.getChars(0, imageSize.length(), outStringValue, 0);
outStringValue[imageSize.length()] = 0;
return MtpConstants.RESPONSE_OK;
default:
return MtpConstants.RESPONSE_DEVICE_PROP_NOT_SUPPORTED;
}
}
private int setDeviceProperty(int property, long intValue, String stringValue) {
switch (property) {
case MtpConstants.DEVICE_PROPERTY_SYNCHRONIZATION_PARTNER:
case MtpConstants.DEVICE_PROPERTY_DEVICE_FRIENDLY_NAME:
// writable string properties kept in shared prefs
SharedPreferences.Editor e = mDeviceProperties.edit();
e.putString(Integer.toString(property), stringValue);
return (e.commit() ? MtpConstants.RESPONSE_OK
: MtpConstants.RESPONSE_GENERAL_ERROR);
}
return MtpConstants.RESPONSE_DEVICE_PROP_NOT_SUPPORTED;
}
private boolean getObjectInfo(int handle, int[] outStorageFormatParent,
char[] outName, long[] outCreatedModified) {
Cursor c = null;
try {
c = mMediaProvider.query(mPackageName, mObjectsUri, OBJECT_INFO_PROJECTION,
ID_WHERE, new String[] { Integer.toString(handle) }, null, null);
if (c != null && c.moveToNext()) {
outStorageFormatParent[0] = c.getInt(1);
outStorageFormatParent[1] = c.getInt(2);
outStorageFormatParent[2] = c.getInt(3);
// extract name from path
String path = c.getString(4);
int lastSlash = path.lastIndexOf('/');
int start = (lastSlash >= 0 ? lastSlash + 1 : 0);
int end = path.length();
if (end - start > 255) {
end = start + 255;
}
path.getChars(start, end, outName, 0);
outName[end - start] = 0;
outCreatedModified[0] = c.getLong(5);
outCreatedModified[1] = c.getLong(6);
// use modification date as creation date if date added is not set
if (outCreatedModified[0] == 0) {
outCreatedModified[0] = outCreatedModified[1];
}
return true;
}
} catch (RemoteException e) {
Log.e(TAG, "RemoteException in getObjectInfo", e);
} finally {
if (c != null) {
c.close();
}
}
return false;
}
private int getObjectFilePath(int handle, char[] outFilePath, long[] outFileLengthFormat) {
if (handle == 0) {
// special case root directory
mMediaStoragePath.getChars(0, mMediaStoragePath.length(), outFilePath, 0);
outFilePath[mMediaStoragePath.length()] = 0;
outFileLengthFormat[0] = 0;
outFileLengthFormat[1] = MtpConstants.FORMAT_ASSOCIATION;
return MtpConstants.RESPONSE_OK;
}
Cursor c = null;
try {
c = mMediaProvider.query(mPackageName, mObjectsUri, PATH_FORMAT_PROJECTION,
ID_WHERE, new String[] { Integer.toString(handle) }, null, null);
if (c != null && c.moveToNext()) {
String path = c.getString(1);
path.getChars(0, path.length(), outFilePath, 0);
outFilePath[path.length()] = 0;
// File transfers from device to host will likely fail if the size is incorrect.
// So to be safe, use the actual file size here.
outFileLengthFormat[0] = new File(path).length();
outFileLengthFormat[1] = c.getLong(2);
return MtpConstants.RESPONSE_OK;
} else {
return MtpConstants.RESPONSE_INVALID_OBJECT_HANDLE;
}
} catch (RemoteException e) {
Log.e(TAG, "RemoteException in getObjectFilePath", e);
return MtpConstants.RESPONSE_GENERAL_ERROR;
} finally {
if (c != null) {
c.close();
}
}
}
private int deleteFile(int handle) {
mDatabaseModified = true;
String path = null;
int format = 0;
Cursor c = null;
try {
c = mMediaProvider.query(mPackageName, mObjectsUri, PATH_FORMAT_PROJECTION,
ID_WHERE, new String[] { Integer.toString(handle) }, null, null);
if (c != null && c.moveToNext()) {
// don't convert to media path here, since we will be matching
// against paths in the database matching /data/media
path = c.getString(1);
format = c.getInt(2);
} else {
return MtpConstants.RESPONSE_INVALID_OBJECT_HANDLE;
}
if (path == null || format == 0) {
return MtpConstants.RESPONSE_GENERAL_ERROR;
}
// do not allow deleting any of the special subdirectories
if (isStorageSubDirectory(path)) {
return MtpConstants.RESPONSE_OBJECT_WRITE_PROTECTED;
}
if (format == MtpConstants.FORMAT_ASSOCIATION) {
// recursive case - delete all children first
Uri uri = Files.getMtpObjectsUri(mVolumeName);
int count = mMediaProvider.delete(mPackageName, uri,
// the 'like' makes it use the index, the 'lower()' makes it correct
// when the path contains sqlite wildcard characters
"_data LIKE ?1 AND lower(substr(_data,1,?2))=lower(?3)",
new String[] { path + "/%",Integer.toString(path.length() + 1), path + "/"});
}
Uri uri = Files.getMtpObjectsUri(mVolumeName, handle);
if (mMediaProvider.delete(mPackageName, uri, null, null) > 0) {
if (format != MtpConstants.FORMAT_ASSOCIATION
&& path.toLowerCase(Locale.US).endsWith("/.nomedia")) {
try {
String parentPath = path.substring(0, path.lastIndexOf("/"));
mMediaProvider.call(mPackageName, MediaStore.UNHIDE_CALL, parentPath, null);
} catch (RemoteException e) {
Log.e(TAG, "failed to unhide/rescan for " + path);
}
}
return MtpConstants.RESPONSE_OK;
} else {
return MtpConstants.RESPONSE_INVALID_OBJECT_HANDLE;
}
} catch (RemoteException e) {
Log.e(TAG, "RemoteException in deleteFile", e);
return MtpConstants.RESPONSE_GENERAL_ERROR;
} finally {
if (c != null) {
c.close();
}
}
}
private int[] getObjectReferences(int handle) {
Uri uri = Files.getMtpReferencesUri(mVolumeName, handle);
Cursor c = null;
try {
c = mMediaProvider.query(mPackageName, uri, ID_PROJECTION, null, null, null, null);
if (c == null) {
return null;
}
int count = c.getCount();
if (count > 0) {
int[] result = new int[count];
for (int i = 0; i < count; i++) {
c.moveToNext();
result[i] = c.getInt(0);
}
return result;
}
} catch (RemoteException e) {
Log.e(TAG, "RemoteException in getObjectList", e);
} finally {
if (c != null) {
c.close();
}
}
return null;
}
private int setObjectReferences(int handle, int[] references) {
mDatabaseModified = true;
Uri uri = Files.getMtpReferencesUri(mVolumeName, handle);
int count = references.length;
ContentValues[] valuesList = new ContentValues[count];
for (int i = 0; i < count; i++) {
ContentValues values = new ContentValues();
values.put(Files.FileColumns._ID, references[i]);
valuesList[i] = values;
}
try {
if (mMediaProvider.bulkInsert(mPackageName, uri, valuesList) > 0) {
return MtpConstants.RESPONSE_OK;
}
} catch (RemoteException e) {
Log.e(TAG, "RemoteException in setObjectReferences", e);
}
return MtpConstants.RESPONSE_GENERAL_ERROR;
}
private void sessionStarted() {
mDatabaseModified = false;
}
private void sessionEnded() {
if (mDatabaseModified) {
mContext.sendBroadcast(new Intent(MediaStore.ACTION_MTP_SESSION_END));
mDatabaseModified = false;
}
}
// used by the JNI code
private int mNativeContext;
private native final void native_setup();
private native final void native_finalize();
}