BluetoothControllerImpl.java revision ccb6b9a90f228cc4e31a9442ed28756ff474c080 
1/*
2 * Copyright (C) 2008 The Android Open Source Project
3 *
4 * Licensed under the Apache License, Version 2.0 (the "License");
5 * you may not use this file except in compliance with the License.
6 * You may obtain a copy of the License at
7 *
8 *      http://www.apache.org/licenses/LICENSE-2.0
9 *
10 * Unless required by applicable law or agreed to in writing, software
11 * distributed under the License is distributed on an "AS IS" BASIS,
12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
13 * See the License for the specific language governing permissions and
14 * limitations under the License.
15 */
16
17package com.android.systemui.statusbar.policy;
18
19import android.bluetooth.BluetoothAdapter;
20import android.bluetooth.BluetoothAdapter.BluetoothStateChangeCallback;
21import android.bluetooth.BluetoothDevice;
22import android.content.BroadcastReceiver;
23import android.content.Context;
24import android.content.Intent;
25import android.content.IntentFilter;
26
27import java.util.ArrayList;
28import java.util.HashSet;
29import java.util.Set;
30
31public class BluetoothControllerImpl extends BroadcastReceiver implements BluetoothController {
32    private static final String TAG = "StatusBar.BluetoothController";
33
34    private final BluetoothAdapter mAdapter;
35
36    private boolean mEnabled = false;
37
38    private Set<BluetoothDevice> mBondedDevices = new HashSet<BluetoothDevice>();
39
40    private ArrayList<BluetoothStateChangeCallback> mChangeCallbacks =
41            new ArrayList<BluetoothStateChangeCallback>();
42
43    public BluetoothControllerImpl(Context context) {
44        mAdapter = BluetoothAdapter.getDefaultAdapter();
45
46        IntentFilter filter = new IntentFilter();
47        filter.addAction(BluetoothAdapter.ACTION_STATE_CHANGED);
48        filter.addAction(BluetoothAdapter.ACTION_CONNECTION_STATE_CHANGED);
49        filter.addAction(BluetoothDevice.ACTION_BOND_STATE_CHANGED);
50        context.registerReceiver(this, filter);
51
52        final BluetoothAdapter adapter = BluetoothAdapter.getDefaultAdapter();
53        if (adapter != null) {
54            handleAdapterStateChange(adapter.getState());
55        }
56        fireCallbacks();
57        updateBondedBluetoothDevices();
58    }
59
60    public void addStateChangedCallback(BluetoothStateChangeCallback cb) {
61        mChangeCallbacks.add(cb);
62        fireCallback(cb);
63    }
64
65    @Override
66    public void removeStateChangedCallback(BluetoothStateChangeCallback cb) {
67        mChangeCallbacks.remove(cb);
68    }
69
70    @Override
71    public boolean isBluetoothEnabled() {
72        return mAdapter != null && mAdapter.isEnabled();
73    }
74
75    @Override
76    public boolean isBluetoothConnected() {
77        return mAdapter != null
78                && mAdapter.getConnectionState() == BluetoothAdapter.STATE_CONNECTED;
79    }
80
81    @Override
82    public void setBluetoothEnabled(boolean enabled) {
83        if (mAdapter != null) {
84            if (enabled) {
85                mAdapter.enable();
86            } else {
87                mAdapter.disable();
88            }
89        }
90    }
91
92    @Override
93    public boolean isBluetoothSupported() {
94        return mAdapter != null;
95    }
96
97    public Set<BluetoothDevice> getBondedBluetoothDevices() {
98        return mBondedDevices;
99    }
100
101    @Override
102    public void onReceive(Context context, Intent intent) {
103        final String action = intent.getAction();
104
105        if (action.equals(BluetoothAdapter.ACTION_STATE_CHANGED)) {
106            handleAdapterStateChange(
107                    intent.getIntExtra(BluetoothAdapter.EXTRA_STATE, BluetoothAdapter.ERROR));
108        }
109        fireCallbacks();
110        updateBondedBluetoothDevices();
111    }
112
113    private void updateBondedBluetoothDevices() {
114        mBondedDevices.clear();
115
116        BluetoothAdapter adapter = BluetoothAdapter.getDefaultAdapter();
117        if (adapter != null) {
118            Set<BluetoothDevice> devices = adapter.getBondedDevices();
119            if (devices != null) {
120                for (BluetoothDevice device : devices) {
121                    if (device.getBondState() != BluetoothDevice.BOND_NONE) {
122                        mBondedDevices.add(device);
123                    }
124                }
125            }
126        }
127    }
128
129    private void handleAdapterStateChange(int adapterState) {
130        mEnabled = (adapterState == BluetoothAdapter.STATE_ON);
131    }
132
133    private void fireCallbacks() {
134        for (BluetoothStateChangeCallback cb : mChangeCallbacks) {
135            fireCallback(cb);
136        }
137    }
138
139    private void fireCallback(BluetoothStateChangeCallback cb) {
140        cb.onBluetoothStateChange(mEnabled);
141    }
142}
143