Android: Java Class to Get Bluetooth Device Name and Channel

Android Remote Bluetooth Device Name and Channel Details

This below Java Class in Android Application Development is to get the Bluetooth Name and the Channel of an Android Device. This java class is used for the following requirements
1. To get Bluetooth Device Name
2. To get Channel Name
3. To set Bluetooth Device Name
4. To set Channel for remote users
5. To Remove channel for remote Users

Java Class to Get Bluetooth Device Name and Channel


/*
* 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.util.HashMap;

import android.bluetooth.BluetoothDevice;
import android.content.Context;
import android.content.SharedPreferences;
import android.content.SharedPreferences.Editor;
import android.util.Log;

/**
* This class cache Bluetooth device name and channel locally. Its a temp
* solution which should be replaced by bluetooth_devices in SettingsProvider
*/
public class BluetoothOppPreference {
private static final String TAG = "BluetoothOppPreference";
private static final boolean V = Constants.VERBOSE;

private static BluetoothOppPreference INSTANCE;

/* Used when obtaining a reference to the singleton instance. */
private static Object INSTANCE_LOCK = new Object();

private boolean mInitialized;

private Context mContext;

private SharedPreferences mNamePreference;

private SharedPreferences mChannelPreference;

private HashMap<String, Integer> mChannels = new HashMap<String, Integer>();

private HashMap<String, String> mNames = new HashMap<String, String>();

public static BluetoothOppPreference getInstance(Context context) {
synchronized (INSTANCE_LOCK) {
if (INSTANCE == null) {
INSTANCE = new BluetoothOppPreference();
}
if (!INSTANCE.init(context)) {
return null;
}
return INSTANCE;
}
}

private boolean init(Context context) {
if (mInitialized)
return true;
mInitialized = true;

mContext = context;

mNamePreference = mContext.getSharedPreferences(
Constants.BLUETOOTHOPP_NAME_PREFERENCE,
Context.MODE_PRIVATE);
mChannelPreference = mContext.getSharedPreferences(
Constants.BLUETOOTHOPP_CHANNEL_PREFERENCE,
Context.MODE_PRIVATE);

mNames = (HashMap<String, String>) mNamePreference.getAll();
mChannels = (HashMap<String, Integer>) mChannelPreference
.getAll();

return true;
}

private String getChannelKey(BluetoothDevice remoteDevice, int uuid) {
return remoteDevice.getAddress() + "_"
+ Integer.toHexString(uuid);
}

public String getName(BluetoothDevice remoteDevice) {
if (remoteDevice.getAddress().equals("FF:FF:FF:00:00:00")) {
return "localhost";
}
if (!mNames.isEmpty()) {
String name = mNames.get(remoteDevice.getAddress());
if (name != null) {
return name;
}
}
return null;
}

public int getChannel(BluetoothDevice remoteDevice, int uuid) {
String key = getChannelKey(remoteDevice, uuid);
if (V)
Log.v(TAG, "getChannel " + key);
Integer channel = null;
if (mChannels != null) {
channel = mChannels.get(key);
if (V)
Log.v(TAG, "getChannel for " + remoteDevice + "_"
+ Integer.toHexString(uuid) + " as " + channel);
}
return (channel != null) ? channel : -1;
}

public void setName(BluetoothDevice remoteDevice, String name) {
if (V)
Log.v(TAG, "Setname for " + remoteDevice + " to " + name);
if (!name.equals(getName(remoteDevice))) {
Editor ed = mNamePreference.edit();
ed.putString(remoteDevice.getAddress(), name);
ed.apply();
mNames.put(remoteDevice.getAddress(), name);
}
}

public void setChannel(BluetoothDevice remoteDevice, int uuid,
int channel) {
if (V)
Log.v(TAG, "Setchannel for " + remoteDevice + "_"
+ Integer.toHexString(uuid) + " to " + channel);
if (channel != getChannel(remoteDevice, uuid)) {
String key = getChannelKey(remoteDevice, uuid);
Editor ed = mChannelPreference.edit();
ed.putInt(key, channel);
ed.apply();
mChannels.put(key, channel);
}
}

public void removeChannel(BluetoothDevice remoteDevice, int uuid) {
String key = getChannelKey(remoteDevice, uuid);
Editor ed = mChannelPreference.edit();
ed.remove(key);
ed.apply();
mChannels.remove(key);
}

public void dump() {
Log.d(TAG, "Dumping Names: ");
Log.d(TAG, mNames.toString());
Log.d(TAG, "Dumping Channels: ");
Log.d(TAG, mChannels.toString());
}
}


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