Android: Java Class to Store Bluetooth Sent File Info

File Sharing: How to Save Bluetooth Sent File Details

This below Java Class in Android Bluetooth Application Development is to store sent file information. These are all the below requirements this Java class is used for
1. To get file name, file type and size
2. To set destination device over Bluetooth connection
3. To generate file info and store
4. To accept and reject Bluetooth file sharing
5. To open file input stream

Java Class to Save Bluetooth Sent File Info


/*
* Copyright (c) 2008-2009, Motorola, Inc.
*
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions are met:
*
* - Redistributions of source code must retain the above copyright notice,
* this list of conditions and the following disclaimer.
*
* - Redistributions in binary form must reproduce the above copyright notice,
* this list of conditions and the following disclaimer in the documentation
* and/or other materials provided with the distribution.
*
* - Neither the name of the Motorola, Inc. nor the names of its contributors
* may be used to endorse or promote products derived from this software
* without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
* AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
* ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE
* LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
* CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
* SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
* INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
* CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
* POSSIBILITY OF SUCH DAMAGE.
*/

package com.android.bluetooth.opp;

import java.io.File;
import java.io.IOException;
import java.io.FileInputStream;
import java.io.FileNotFoundException;

import android.util.Log;
import android.content.ContentResolver;
import android.content.Context;
import android.database.Cursor;
import android.net.Uri;
import android.provider.OpenableColumns;

/**
* This class stores information about a single sending file It will only be
* used for outbound share.
*/
public class BluetoothOppSendFileInfo {
private static final String TAG = "BluetoothOppSendFileInfo";

private static final boolean D = Constants.DEBUG;

private static final boolean V = Constants.VERBOSE;

/** readable media file name */
public final String mFileName;

/** media file input stream */
public final FileInputStream mInputStream;

/** vCard string data */
public final String mData;

public final int mStatus;

public final String mMimetype;

public final long mLength;

public final String mDestAddr;

/** for media file */
public BluetoothOppSendFileInfo(String fileName, String type,
long length, FileInputStream inputStream, int status,
String dest) {
mFileName = fileName;
mMimetype = type;
mLength = length;
mInputStream = inputStream;
mStatus = status;
mDestAddr = dest;
mData = null;
}

/** for vCard, or later for vCal, vNote. Not used currently */
public BluetoothOppSendFileInfo(String data, String type,
long length, int status, String dest) {
mFileName = null;
mInputStream = null;
mData = data;
mMimetype = type;
mLength = length;
mStatus = status;
mDestAddr = dest;
}

public static BluetoothOppSendFileInfo generateFileInfo(
Context context, String uri, String type, String dest) {
ContentResolver contentResolver = context.getContentResolver();
Uri u = Uri.parse(uri);
String scheme = u.getScheme();
String fileName = null;
String contentType = null;
long length = 0;
// Support all Uri with "content" scheme
// This will allow more 3rd party applications to share files via
// bluetooth
if (scheme.equals("content")) {
contentType = contentResolver.getType(u);
Cursor metadataCursor = contentResolver.query(u,
new String[] { OpenableColumns.DISPLAY_NAME,
OpenableColumns.SIZE }, null, null, null);
if (metadataCursor != null) {
try {
if (metadataCursor.moveToFirst()) {
fileName = metadataCursor.getString(0);
length = metadataCursor.getInt(1);
if (D)
Log.d(TAG, "fileName = " + fileName
+ " length = " + length);
}
} finally {
metadataCursor.close();
}
}
} else if (scheme.equals("file")) {
fileName = u.getLastPathSegment();
contentType = type;
File f = new File(u.getPath());
length = f.length();
} else {
// currently don't accept other scheme
return new BluetoothOppSendFileInfo(null, null, 0, null,
BluetoothShare.STATUS_FILE_ERROR, dest);
}
FileInputStream is;
try {
is = (FileInputStream) contentResolver.openInputStream(u);
} catch (FileNotFoundException e) {
return new BluetoothOppSendFileInfo(null, null, 0, null,
BluetoothShare.STATUS_FILE_ERROR, dest);
}

// If we can not get file length from content provider, we can try to
// get the length via the opened stream.
if (length == 0) {
try {
length = is.available();
if (V)
Log.v(TAG, "file length is " + length);
} catch (IOException e) {
Log.e(TAG, "Read stream exception: ", e);
return new BluetoothOppSendFileInfo(null, null, 0,
null, BluetoothShare.STATUS_FILE_ERROR, dest);
}
}

return new BluetoothOppSendFileInfo(fileName, contentType,
length, is, 0, dest);
}
}



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