MTP: Add support for renaming files (5ebac83e) · Commits · e / os / android_frameworks_base

media/java/android/media/MtpDatabase.java

+77 −1

Original line number	Diff line number	Diff line
		@@ -31,6 +31,8 @@ import android.provider.MediaStore.MediaColumns;
		import android.provider.Mtp;
		import android.util.Log;

		import java.io.File;

		/**
		* {@hide}
		*/
		@@ -57,6 +59,11 @@ public class MtpDatabase {
		private static final String[] ID_PROJECTION = new String[] {
		Files.FileColumns._ID, // 0
		};
		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[] PATH_SIZE_PROJECTION = new String[] {
		Files.FileColumns._ID, // 0
		Files.FileColumns.DATA, // 1
		@@ -467,6 +474,68 @@ public class MtpDatabase {
		return path.substring(start, end);
		}

		private int renameFile(int handle, String newName) {
		Cursor c = null;

		// first compute current path
		String path = null;
		int format = 0;
		String[] whereArgs = new String[] { Integer.toString(handle) };
		try {
		c = mMediaProvider.query(mObjectsUri, PATH_FORMAT_PROJECTION, ID_WHERE, whereArgs, null);
		if (c != null && c.moveToNext()) {
		path = c.getString(1);
		format = c.getInt(2);
		}
		} 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;
		}
		if (format == MtpConstants.FORMAT_ASSOCIATION) {
		// Only files can be renamed
		return MtpConstants.RESPONSE_ACCESS_DENIED;
		}

		// 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);
		Log.d(TAG, "renaming "+ path + " to " + newPath + (success ? " succeeded" : " failed"));
		if (!success) {
		return MtpConstants.RESPONSE_GENERAL_ERROR;
		}

		// finally update database
		ContentValues values = new ContentValues();
		values.put(Files.FileColumns.DATA, newPath);
		int updated = 0;
		try {
		updated = mMediaProvider.update(mObjectsUri, values, ID_WHERE, whereArgs);
		} catch (RemoteException e) {
		Log.e(TAG, "RemoteException in mMediaProvider.update", e);
		}
		if (updated != 1) {
		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;
		}

		return MtpConstants.RESPONSE_OK;
		}

		private int getObjectProperty(int handle, int property,
		long[] outIntValue, char[] outStringValue) {
		Log.d(TAG, "getObjectProperty: " + property);
		@@ -605,8 +674,15 @@ public class MtpDatabase {
		private int setObjectProperty(int handle, int property,
		long intValue, String stringValue) {
		Log.d(TAG, "setObjectProperty: " + property);

		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) {
		Log.d(TAG, "getDeviceProperty: " + property);

media/jni/android_media_MtpDatabase.cpp

+5 −1

Original line number	Diff line number	Diff line
		@@ -804,7 +804,6 @@ MtpProperty* MyMtpDatabase::getObjectPropertyDesc(MtpObjectProperty property,
		result = new MtpProperty(property, MTP_TYPE_UINT128);
		break;
		case MTP_PROPERTY_NAME:
		case MTP_PROPERTY_OBJECT_FILE_NAME:
		case MTP_PROPERTY_DATE_MODIFIED:
		case MTP_PROPERTY_DISPLAY_NAME:
		case MTP_PROPERTY_DATE_ADDED:
		@@ -817,6 +816,11 @@ MtpProperty* MyMtpDatabase::getObjectPropertyDesc(MtpObjectProperty property,
		case MTP_PROPERTY_DESCRIPTION:
		result = new MtpProperty(property, MTP_TYPE_STR);
		break;
		case MTP_PROPERTY_OBJECT_FILE_NAME:
		// We allow renaming files but not folders
		result = new MtpProperty(property, MTP_TYPE_STR,
		format != MTP_FORMAT_ASSOCIATION);
		break;
		}

		return result;