BluetoothController.java revision 3c87566c115e1fce3fdc09a6fe40488bcdc04cde 
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 BluetoothController extends BroadcastReceiver {
32    private static final String TAG = "StatusBar.BluetoothController";
33
34    private boolean mEnabled = false;
35
36    private Set<BluetoothDevice> mBondedDevices = new HashSet<BluetoothDevice>();
37
38    private ArrayList<BluetoothStateChangeCallback> mChangeCallbacks =
39            new ArrayList<BluetoothStateChangeCallback>();
40
41    public BluetoothController(Context context) {
42
43        IntentFilter filter = new IntentFilter();
44        filter.addAction(BluetoothAdapter.ACTION_STATE_CHANGED);
45        filter.addAction(BluetoothAdapter.ACTION_CONNECTION_STATE_CHANGED);
46        filter.addAction(BluetoothDevice.ACTION_BOND_STATE_CHANGED);
47        context.registerReceiver(this, filter);
48
49        final BluetoothAdapter adapter = BluetoothAdapter.getDefaultAdapter();
50        if (adapter != null) {
51            handleAdapterStateChange(adapter.getState());
52        }
53        fireCallbacks();
54        updateBondedBluetoothDevices();
55    }
56
57    public void addStateChangedCallback(BluetoothStateChangeCallback cb) {
58        mChangeCallbacks.add(cb);
59    }
60
61    public Set<BluetoothDevice> getBondedBluetoothDevices() {
62        return mBondedDevices;
63    }
64
65    @Override
66    public void onReceive(Context context, Intent intent) {
67        final String action = intent.getAction();
68
69        if (action.equals(BluetoothAdapter.ACTION_STATE_CHANGED)) {
70            handleAdapterStateChange(
71                    intent.getIntExtra(BluetoothAdapter.EXTRA_STATE, BluetoothAdapter.ERROR));
72        }
73        fireCallbacks();
74        updateBondedBluetoothDevices();
75    }
76
77    private void updateBondedBluetoothDevices() {
78        mBondedDevices.clear();
79
80        BluetoothAdapter adapter = BluetoothAdapter.getDefaultAdapter();
81        if (adapter != null) {
82            Set<BluetoothDevice> devices = adapter.getBondedDevices();
83            if (devices != null) {
84                for (BluetoothDevice device : devices) {
85                    if (device.getBondState() != BluetoothDevice.BOND_NONE) {
86                        mBondedDevices.add(device);
87                    }
88                }
89            }
90        }
91    }
92
93    private void handleAdapterStateChange(int adapterState) {
94        mEnabled = (adapterState == BluetoothAdapter.STATE_ON);
95    }
96
97    private void fireCallbacks() {
98        for (BluetoothStateChangeCallback cb : mChangeCallbacks) {
99            cb.onBluetoothStateChange(mEnabled);
100        }
101    }
102}
103