/*
* Copyright (C) 2011 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 com.android.settingslib.bluetooth;
import android.bluetooth.BluetoothAdapter;
import android.bluetooth.BluetoothClass;
import android.bluetooth.BluetoothDevice;
import android.content.BroadcastReceiver;
import android.content.Context;
import android.content.Intent;
import android.content.IntentFilter;
import android.util.Log;
import com.android.settingslib.R;
import java.util.ArrayList;
import java.util.Collection;
import java.util.HashMap;
import java.util.Map;
import java.util.Set;
/**
* BluetoothEventManager receives broadcasts and callbacks from the Bluetooth
* API and dispatches the event on the UI thread to the right class in the
* Settings.
*/
public final class BluetoothEventManager {
private static final String TAG = "BluetoothEventManager";
private final LocalBluetoothAdapter mLocalAdapter;
private final CachedBluetoothDeviceManager mDeviceManager;
private LocalBluetoothProfileManager mProfileManager;
private final IntentFilter mAdapterIntentFilter, mProfileIntentFilter;
private final Map<String, Handler> mHandlerMap;
private Context mContext;
private final Collection<BluetoothCallback> mCallbacks =
new ArrayList<BluetoothCallback>();
private android.os.Handler mReceiverHandler;
interface Handler {
void onReceive(Context context, Intent intent, BluetoothDevice device);
}
private void addHandler(String action, Handler handler) {
mHandlerMap.put(action, handler);
mAdapterIntentFilter.addAction(action);
}
void addProfileHandler(String action, Handler handler) {
mHandlerMap.put(action, handler);
mProfileIntentFilter.addAction(action);
}
// Set profile manager after construction due to circular dependency
void setProfileManager(LocalBluetoothProfileManager manager) {
mProfileManager = manager;
}
BluetoothEventManager(LocalBluetoothAdapter adapter,
CachedBluetoothDeviceManager deviceManager, Context context) {
mLocalAdapter = adapter;
mDeviceManager = deviceManager;
mAdapterIntentFilter = new IntentFilter();
mProfileIntentFilter = new IntentFilter();
mHandlerMap = new HashMap<String, Handler>();
mContext = context;
// Bluetooth on/off broadcasts
addHandler(BluetoothAdapter.ACTION_STATE_CHANGED, new AdapterStateChangedHandler());
// Generic connected/not broadcast
addHandler(BluetoothAdapter.ACTION_CONNECTION_STATE_CHANGED,
new ConnectionStateChangedHandler());
// Discovery broadcasts
addHandler(BluetoothAdapter.ACTION_DISCOVERY_STARTED, new ScanningStateChangedHandler(true));
addHandler(BluetoothAdapter.ACTION_DISCOVERY_FINISHED, new ScanningStateChangedHandler(false));
addHandler(BluetoothDevice.ACTION_FOUND, new DeviceFoundHandler());
addHandler(BluetoothDevice.ACTION_DISAPPEARED, new DeviceDisappearedHandler());
addHandler(BluetoothDevice.ACTION_NAME_CHANGED, new NameChangedHandler());
addHandler(BluetoothDevice.ACTION_ALIAS_CHANGED, new NameChangedHandler());
// Pairing broadcasts
addHandler(BluetoothDevice.ACTION_BOND_STATE_CHANGED, new BondStateChangedHandler());
addHandler(BluetoothDevice.ACTION_PAIRING_CANCEL, new PairingCancelHandler());
// Fine-grained state broadcasts
addHandler(BluetoothDevice.ACTION_CLASS_CHANGED, new ClassChangedHandler());
addHandler(BluetoothDevice.ACTION_UUID, new UuidChangedHandler());
// Dock event broadcasts
addHandler(Intent.ACTION_DOCK_EVENT, new DockEventHandler());
mContext.registerReceiver(mBroadcastReceiver, mAdapterIntentFilter, null, mReceiverHandler);
}
void registerProfileIntentReceiver() {
mContext.registerReceiver(mBroadcastReceiver, mProfileIntentFilter, null, mReceiverHandler);
}
public void setReceiverHandler(android.os.Handler handler) {
mContext.unregisterReceiver(mBroadcastReceiver);
mReceiverHandler = handler;
mContext.registerReceiver(mBroadcastReceiver, mAdapterIntentFilter, null, mReceiverHandler);
registerProfileIntentReceiver();
}
/** Register to start receiving callbacks for Bluetooth events. */
public void registerCallback(BluetoothCallback callback) {
synchronized (mCallbacks) {
mCallbacks.add(callback);
}
}
/** Unregister to stop receiving callbacks for Bluetooth events. */
public void unregisterCallback(BluetoothCallback callback) {
synchronized (mCallbacks) {
mCallbacks.remove(callback);
}
}
private final BroadcastReceiver mBroadcastReceiver = new BroadcastReceiver() {
@Override
public void onReceive(Context context, Intent intent) {
String action = intent.getAction();
BluetoothDevice device = intent
.getParcelableExtra(BluetoothDevice.EXTRA_DEVICE);
Handler handler = mHandlerMap.get(action);
if (handler != null) {
handler.onReceive(context, intent, device);
}
}
};
private class AdapterStateChangedHandler implements Handler {
public void onReceive(Context context, Intent intent,
BluetoothDevice device) {
int state = intent.getIntExtra(BluetoothAdapter.EXTRA_STATE,
BluetoothAdapter.ERROR);
// update local profiles and get paired devices
mLocalAdapter.setBluetoothStateInt(state);
// send callback to update UI and possibly start scanning
synchronized (mCallbacks) {
for (BluetoothCallback callback : mCallbacks) {
callback.onBluetoothStateChanged(state);
}
}
// Inform CachedDeviceManager that the adapter state has changed
mDeviceManager.onBluetoothStateChanged(state);
}
}
private class ScanningStateChangedHandler implements Handler {
private final boolean mStarted;
ScanningStateChangedHandler(boolean started) {
mStarted = started;
}
public void onReceive(Context context, Intent intent,
BluetoothDevice device) {
synchronized (mCallbacks) {
for (BluetoothCallback callback : mCallbacks) {
callback.onScanningStateChanged(mStarted);
}
}
mDeviceManager.onScanningStateChanged(mStarted);
}
}
private class DeviceFoundHandler implements Handler {
public void onReceive(Context context, Intent intent,
BluetoothDevice device) {
short rssi = intent.getShortExtra(BluetoothDevice.EXTRA_RSSI, Short.MIN_VALUE);
BluetoothClass btClass = intent.getParcelableExtra(BluetoothDevice.EXTRA_CLASS);
String name = intent.getStringExtra(BluetoothDevice.EXTRA_NAME);
// TODO Pick up UUID. They should be available for 2.1 devices.
// Skip for now, there's a bluez problem and we are not getting uuids even for 2.1.
CachedBluetoothDevice cachedDevice = mDeviceManager.findDevice(device);
if (cachedDevice == null) {
cachedDevice = mDeviceManager.addDevice(mLocalAdapter, mProfileManager, device);
Log.d(TAG, "DeviceFoundHandler created new CachedBluetoothDevice: "
+ cachedDevice);
}
cachedDevice.setRssi(rssi);
cachedDevice.setBtClass(btClass);
cachedDevice.setNewName(name);
cachedDevice.setVisible(true);
}
}
private class ConnectionStateChangedHandler implements Handler {
@Override
public void onReceive(Context context, Intent intent, BluetoothDevice device) {
CachedBluetoothDevice cachedDevice = mDeviceManager.findDevice(device);
int state = intent.getIntExtra(BluetoothAdapter.EXTRA_CONNECTION_STATE,
BluetoothAdapter.ERROR);
dispatchConnectionStateChanged(cachedDevice, state);
}
}
private void dispatchConnectionStateChanged(CachedBluetoothDevice cachedDevice, int state) {
synchronized (mCallbacks) {
for (BluetoothCallback callback : mCallbacks) {
callback.onConnectionStateChanged(cachedDevice, state);
}
}
}
void dispatchDeviceAdded(CachedBluetoothDevice cachedDevice) {
synchronized (mCallbacks) {
for (BluetoothCallback callback : mCallbacks) {
callback.onDeviceAdded(cachedDevice);
}
}
}
private class DeviceDisappearedHandler implements Handler {
public void onReceive(Context context, Intent intent,
BluetoothDevice device) {
CachedBluetoothDevice cachedDevice = mDeviceManager.findDevice(device);
if (cachedDevice == null) {
Log.w(TAG, "received ACTION_DISAPPEARED for an unknown device: " + device);
return;
}
if (CachedBluetoothDeviceManager.onDeviceDisappeared(cachedDevice)) {
synchronized (mCallbacks) {
for (BluetoothCallback callback : mCallbacks) {
callback.onDeviceDeleted(cachedDevice);
}
}
}
}
}
private class NameChangedHandler implements Handler {
public void onReceive(Context context, Intent intent,
BluetoothDevice device) {
mDeviceManager.onDeviceNameUpdated(device);
}
}
private class BondStateChangedHandler implements Handler {
public void onReceive(Context context, Intent intent,
BluetoothDevice device) {
if (device == null) {
Log.e(TAG, "ACTION_BOND_STATE_CHANGED with no EXTRA_DEVICE");
return;
}
int bondState = intent.getIntExtra(BluetoothDevice.EXTRA_BOND_STATE,
BluetoothDevice.ERROR);
CachedBluetoothDevice cachedDevice = mDeviceManager.findDevice(device);
if (cachedDevice == null) {
Log.w(TAG, "CachedBluetoothDevice for device " + device +
" not found, calling readPairedDevices().");
if (!readPairedDevices()) {
Log.e(TAG, "Got bonding state changed for " + device +
", but we have no record of that device.");
return;
}
cachedDevice = mDeviceManager.findDevice(device);
if (cachedDevice == null) {
Log.e(TAG, "Got bonding state changed for " + device +
", but device not added in cache.");
return;
}
}
synchronized (mCallbacks) {
for (BluetoothCallback callback : mCallbacks) {
callback.onDeviceBondStateChanged(cachedDevice, bondState);
}
}
cachedDevice.onBondingStateChanged(bondState);
if (bondState == BluetoothDevice.BOND_NONE) {
int reason = intent.getIntExtra(BluetoothDevice.EXTRA_REASON,
BluetoothDevice.ERROR);
showUnbondMessage(context, cachedDevice.getName(), reason);
}
}
/**
* Called when we have reached the unbonded state.
*
* @param reason one of the error reasons from
* BluetoothDevice.UNBOND_REASON_*
*/
private void showUnbondMessage(Context context, String name, int reason) {
int errorMsg;
switch(reason) {
case BluetoothDevice.UNBOND_REASON_AUTH_FAILED:
errorMsg = R.string.bluetooth_pairing_pin_error_message;
break;
case BluetoothDevice.UNBOND_REASON_AUTH_REJECTED:
errorMsg = R.string.bluetooth_pairing_rejected_error_message;
break;
case BluetoothDevice.UNBOND_REASON_REMOTE_DEVICE_DOWN:
errorMsg = R.string.bluetooth_pairing_device_down_error_message;
break;
case BluetoothDevice.UNBOND_REASON_DISCOVERY_IN_PROGRESS:
case BluetoothDevice.UNBOND_REASON_AUTH_TIMEOUT:
case BluetoothDevice.UNBOND_REASON_REPEATED_ATTEMPTS:
case BluetoothDevice.UNBOND_REASON_REMOTE_AUTH_CANCELED:
errorMsg = R.string.bluetooth_pairing_error_message;
break;
default:
Log.w(TAG, "showUnbondMessage: Not displaying any message for reason: " + reason);
return;
}
Utils.showError(context, name, errorMsg);
}
}
private class ClassChangedHandler implements Handler {
public void onReceive(Context context, Intent intent,
BluetoothDevice device) {
mDeviceManager.onBtClassChanged(device);
}
}
private class UuidChangedHandler implements Handler {
public void onReceive(Context context, Intent intent,
BluetoothDevice device) {
mDeviceManager.onUuidChanged(device);
}
}
private class PairingCancelHandler implements Handler {
public void onReceive(Context context, Intent intent, BluetoothDevice device) {
if (device == null) {
Log.e(TAG, "ACTION_PAIRING_CANCEL with no EXTRA_DEVICE");
return;
}
CachedBluetoothDevice cachedDevice = mDeviceManager.findDevice(device);
if (cachedDevice == null) {
Log.e(TAG, "ACTION_PAIRING_CANCEL with no cached device");
return;
}
int errorMsg = R.string.bluetooth_pairing_error_message;
if (context != null && cachedDevice != null) {
Utils.showError(context, cachedDevice.getName(), errorMsg);
}
}
}
private class DockEventHandler implements Handler {
public void onReceive(Context context, Intent intent, BluetoothDevice device) {
// Remove if unpair device upon undocking
int anythingButUnDocked = Intent.EXTRA_DOCK_STATE_UNDOCKED + 1;
int state = intent.getIntExtra(Intent.EXTRA_DOCK_STATE, anythingButUnDocked);
if (state == Intent.EXTRA_DOCK_STATE_UNDOCKED) {
if (device != null && device.getBondState() == BluetoothDevice.BOND_NONE) {
CachedBluetoothDevice cachedDevice = mDeviceManager.findDevice(device);
if (cachedDevice != null) {
cachedDevice.setVisible(false);
}
}
}
}
}
boolean readPairedDevices() {
Set<BluetoothDevice> bondedDevices = mLocalAdapter.getBondedDevices();
if (bondedDevices == null) {
return false;
}
boolean deviceAdded = false;
for (BluetoothDevice device : bondedDevices) {
CachedBluetoothDevice cachedDevice = mDeviceManager.findDevice(device);
if (cachedDevice == null) {
cachedDevice = mDeviceManager.addDevice(mLocalAdapter, mProfileManager, device);
dispatchDeviceAdded(cachedDevice);
deviceAdded = true;
}
}
return deviceAdded;
}
}