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Android example source code file (BluetoothPbap.java)

This example Android source code file (BluetoothPbap.java) is included in the DevDaily.com "Java Source Code Warehouse" project. The intent of this project is to help you "Learn Android by Example" TM.

Java - Android tags/keywords

android, bluetoothpbap, content, context, dbg, ibinder, ibluetoothpbap, os, proxy, remoteexception, result_success, serviceconnection, servicelistener, state_disconnected, string, tag, throwable, util, utilities, utils

The BluetoothPbap.java Android example source code

/*
 * Copyright (C) 2008 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.bluetooth;

import android.content.ComponentName;
import android.content.Context;
import android.content.Intent;
import android.content.ServiceConnection;
import android.os.RemoteException;
import android.os.IBinder;
import android.os.ServiceManager;
import android.util.Log;

/**
 * The Android Bluetooth API is not finalized, and *will* change. Use at your
 * own risk.
 *
 * Public API for controlling the Bluetooth Pbap Service. This includes
 * Bluetooth Phone book Access profile.
 * BluetoothPbap is a proxy object for controlling the Bluetooth Pbap
 * Service via IPC.
 *
 * Creating a BluetoothPbap object will create a binding with the
 * BluetoothPbap service. Users of this object should call close() when they
 * are finished with the BluetoothPbap, so that this proxy object can unbind
 * from the service.
 *
 * This BluetoothPbap object is not immediately bound to the
 * BluetoothPbap service. Use the ServiceListener interface to obtain a
 * notification when it is bound, this is especially important if you wish to
 * immediately call methods on BluetoothPbap after construction.
 *
 * Android only supports one connected Bluetooth Pce at a time.
 *
 * @hide
 */
public class BluetoothPbap {

    private static final String TAG = "BluetoothPbap";
    private static final boolean DBG = false;

    /** int extra for PBAP_STATE_CHANGED_ACTION */
    public static final String PBAP_STATE =
        "android.bluetooth.pbap.intent.PBAP_STATE";
    /** int extra for PBAP_STATE_CHANGED_ACTION */
    public static final String PBAP_PREVIOUS_STATE =
        "android.bluetooth.pbap.intent.PBAP_PREVIOUS_STATE";

    /** Indicates the state of an pbap connection state has changed.
     *  This intent will always contain PBAP_STATE, PBAP_PREVIOUS_STATE and
     *  BluetoothIntent.ADDRESS extras.
     */
    public static final String PBAP_STATE_CHANGED_ACTION =
        "android.bluetooth.pbap.intent.action.PBAP_STATE_CHANGED";

    private IBluetoothPbap mService;
    private final Context mContext;
    private final ServiceListener mServiceListener;

    /** There was an error trying to obtain the state */
    public static final int STATE_ERROR        = -1;
    /** No client currently connected */
    public static final int STATE_DISCONNECTED = 0;
    /** Connection attempt in progress */
    public static final int STATE_CONNECTING   = 1;
    /** Client is currently connected */
    public static final int STATE_CONNECTED    = 2;

    public static final int RESULT_FAILURE = 0;
    public static final int RESULT_SUCCESS = 1;
    /** Connection canceled before completion. */
    public static final int RESULT_CANCELED = 2;

    /**
     * An interface for notifying Bluetooth PCE IPC clients when they have
     * been connected to the BluetoothPbap service.
     */
    public interface ServiceListener {
        /**
         * Called to notify the client when this proxy object has been
         * connected to the BluetoothPbap service. Clients must wait for
         * this callback before making IPC calls on the BluetoothPbap
         * service.
         */
        public void onServiceConnected();

        /**
         * Called to notify the client that this proxy object has been
         * disconnected from the BluetoothPbap service. Clients must not
         * make IPC calls on the BluetoothPbap service after this callback.
         * This callback will currently only occur if the application hosting
         * the BluetoothPbap service, but may be called more often in future.
         */
        public void onServiceDisconnected();
    }

    /**
     * Create a BluetoothPbap proxy object.
     */
    public BluetoothPbap(Context context, ServiceListener l) {
        mContext = context;
        mServiceListener = l;
        if (!context.bindService(new Intent(IBluetoothPbap.class.getName()), mConnection, 0)) {
            Log.e(TAG, "Could not bind to Bluetooth Pbap Service");
        }
    }

    protected void finalize() throws Throwable {
        try {
            close();
        } finally {
            super.finalize();
        }
    }

    /**
     * Close the connection to the backing service.
     * Other public functions of BluetoothPbap will return default error
     * results once close() has been called. Multiple invocations of close()
     * are ok.
     */
    public synchronized void close() {
        if (mConnection != null) {
            mContext.unbindService(mConnection);
            mConnection = null;
        }
    }

    /**
     * Get the current state of the BluetoothPbap service.
     * @return One of the STATE_ return codes, or STATE_ERROR if this proxy
     *         object is currently not connected to the Pbap service.
     */
    public int getState() {
        if (DBG) log("getState()");
        if (mService != null) {
            try {
                return mService.getState();
            } catch (RemoteException e) {Log.e(TAG, e.toString());}
        } else {
            Log.w(TAG, "Proxy not attached to service");
            if (DBG) log(Log.getStackTraceString(new Throwable()));
        }
        return BluetoothPbap.STATE_ERROR;
    }

    /**
     * Get the currently connected remote Bluetooth device (PCE).
     * @return The remote Bluetooth device, or null if not in connected or
     *         connecting state, or if this proxy object is not connected to
     *         the Pbap service.
     */
    public BluetoothDevice getClient() {
        if (DBG) log("getClient()");
        if (mService != null) {
            try {
                return mService.getClient();
            } catch (RemoteException e) {Log.e(TAG, e.toString());}
        } else {
            Log.w(TAG, "Proxy not attached to service");
            if (DBG) log(Log.getStackTraceString(new Throwable()));
        }
        return null;
    }

    /**
     * Returns true if the specified Bluetooth device is connected (does not
     * include connecting). Returns false if not connected, or if this proxy
     * object is not currently connected to the Pbap service.
     */
    public boolean isConnected(BluetoothDevice device) {
        if (DBG) log("isConnected(" + device + ")");
        if (mService != null) {
            try {
                return mService.isConnected(device);
            } catch (RemoteException e) {Log.e(TAG, e.toString());}
        } else {
            Log.w(TAG, "Proxy not attached to service");
            if (DBG) log(Log.getStackTraceString(new Throwable()));
        }
        return false;
    }

    /**
     * Disconnects the current Pbap client (PCE). Currently this call blocks,
     * it may soon be made asynchornous. Returns false if this proxy object is
     * not currently connected to the Pbap service.
     */
    public boolean disconnect() {
        if (DBG) log("disconnect()");
        if (mService != null) {
            try {
                mService.disconnect();
                return true;
            } catch (RemoteException e) {Log.e(TAG, e.toString());}
        } else {
            Log.w(TAG, "Proxy not attached to service");
            if (DBG) log(Log.getStackTraceString(new Throwable()));
        }
        return false;
    }

    /**
     * Check class bits for possible PBAP support.
     * This is a simple heuristic that tries to guess if a device with the
     * given class bits might support PBAP. It is not accurate for all
     * devices. It tries to err on the side of false positives.
     * @return True if this device might support PBAP.
     */
    public static boolean doesClassMatchSink(BluetoothClass btClass) {
        // TODO optimize the rule
        switch (btClass.getDeviceClass()) {
        case BluetoothClass.Device.COMPUTER_DESKTOP:
        case BluetoothClass.Device.COMPUTER_LAPTOP:
        case BluetoothClass.Device.COMPUTER_SERVER:
        case BluetoothClass.Device.COMPUTER_UNCATEGORIZED:
            return true;
        default:
            return false;
        }
    }

    private ServiceConnection mConnection = new ServiceConnection() {
        public void onServiceConnected(ComponentName className, IBinder service) {
            if (DBG) log("Proxy object connected");
            mService = IBluetoothPbap.Stub.asInterface(service);
            if (mServiceListener != null) {
                mServiceListener.onServiceConnected();
            }
        }
        public void onServiceDisconnected(ComponentName className) {
            if (DBG) log("Proxy object disconnected");
            mService = null;
            if (mServiceListener != null) {
                mServiceListener.onServiceDisconnected();
            }
        }
    };

    private static void log(String msg) {
        Log.d(TAG, msg);
    }
}

Other Android examples (source code examples)

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