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      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 
     17 package com.android.systemui.statusbar.policy;
     18 
     19 import android.bluetooth.BluetoothAdapter;
     20 import android.bluetooth.BluetoothAdapter.BluetoothStateChangeCallback;
     21 import android.bluetooth.BluetoothDevice;
     22 import android.content.BroadcastReceiver;
     23 import android.content.Context;
     24 import android.content.Intent;
     25 import android.content.IntentFilter;
     26 import android.view.View;
     27 import android.widget.ImageView;
     28 
     29 import com.android.systemui.R;
     30 
     31 import java.util.ArrayList;
     32 import java.util.HashSet;
     33 import java.util.Set;
     34 
     35 public class BluetoothController extends BroadcastReceiver {
     36     private static final String TAG = "StatusBar.BluetoothController";
     37 
     38     private Context mContext;
     39     private ArrayList<ImageView> mIconViews = new ArrayList<ImageView>();
     40 
     41     private int mIconId = R.drawable.stat_sys_data_bluetooth;
     42     private int mContentDescriptionId = 0;
     43     private boolean mEnabled = false;
     44 
     45     private Set<BluetoothDevice> mBondedDevices = new HashSet<BluetoothDevice>();
     46 
     47     private ArrayList<BluetoothStateChangeCallback> mChangeCallbacks =
     48             new ArrayList<BluetoothStateChangeCallback>();
     49 
     50     public BluetoothController(Context context) {
     51         mContext = context;
     52 
     53         IntentFilter filter = new IntentFilter();
     54         filter.addAction(BluetoothAdapter.ACTION_STATE_CHANGED);
     55         filter.addAction(BluetoothAdapter.ACTION_CONNECTION_STATE_CHANGED);
     56         filter.addAction(BluetoothDevice.ACTION_BOND_STATE_CHANGED);
     57         context.registerReceiver(this, filter);
     58 
     59         final BluetoothAdapter adapter = BluetoothAdapter.getDefaultAdapter();
     60         if (adapter != null) {
     61             handleAdapterStateChange(adapter.getState());
     62             handleConnectionStateChange(adapter.getConnectionState());
     63         }
     64         refreshViews();
     65         updateBondedBluetoothDevices();
     66     }
     67 
     68     public void addIconView(ImageView v) {
     69         mIconViews.add(v);
     70     }
     71 
     72     public void addStateChangedCallback(BluetoothStateChangeCallback cb) {
     73         mChangeCallbacks.add(cb);
     74     }
     75 
     76     public Set<BluetoothDevice> getBondedBluetoothDevices() {
     77         return mBondedDevices;
     78     }
     79 
     80     @Override
     81     public void onReceive(Context context, Intent intent) {
     82         final String action = intent.getAction();
     83 
     84         if (action.equals(BluetoothAdapter.ACTION_STATE_CHANGED)) {
     85             handleAdapterStateChange(
     86                     intent.getIntExtra(BluetoothAdapter.EXTRA_STATE, BluetoothAdapter.ERROR));
     87         } else if (action.equals(BluetoothAdapter.ACTION_CONNECTION_STATE_CHANGED)) {
     88             handleConnectionStateChange(
     89                     intent.getIntExtra(BluetoothAdapter.EXTRA_CONNECTION_STATE,
     90                         BluetoothAdapter.STATE_DISCONNECTED));
     91         } else if (action.equals(BluetoothDevice.ACTION_BOND_STATE_CHANGED)) {
     92             // Fall through and update bonded devices and refresh view
     93         }
     94         refreshViews();
     95         updateBondedBluetoothDevices();
     96     }
     97 
     98     private void updateBondedBluetoothDevices() {
     99         mBondedDevices.clear();
    100 
    101         BluetoothAdapter adapter = BluetoothAdapter.getDefaultAdapter();
    102         if (adapter != null) {
    103             Set<BluetoothDevice> devices = adapter.getBondedDevices();
    104             if (devices != null) {
    105                 for (BluetoothDevice device : devices) {
    106                     if (device.getBondState() != BluetoothDevice.BOND_NONE) {
    107                         mBondedDevices.add(device);
    108                     }
    109                 }
    110             }
    111         }
    112     }
    113 
    114     public void handleAdapterStateChange(int adapterState) {
    115         mEnabled = (adapterState == BluetoothAdapter.STATE_ON);
    116     }
    117 
    118     public void handleConnectionStateChange(int connectionState) {
    119         final boolean connected = (connectionState == BluetoothAdapter.STATE_CONNECTED);
    120         if (connected) {
    121             mIconId = R.drawable.stat_sys_data_bluetooth_connected;
    122             mContentDescriptionId = R.string.accessibility_bluetooth_connected;
    123         } else {
    124             mIconId = R.drawable.stat_sys_data_bluetooth;
    125             mContentDescriptionId = R.string.accessibility_bluetooth_disconnected;
    126         }
    127     }
    128 
    129     public void refreshViews() {
    130         int N = mIconViews.size();
    131         for (int i=0; i<N; i++) {
    132             ImageView v = mIconViews.get(i);
    133             v.setImageResource(mIconId);
    134             v.setVisibility(mEnabled ? View.VISIBLE : View.GONE);
    135             v.setContentDescription((mContentDescriptionId == 0)
    136                     ? null
    137                     : mContext.getString(mContentDescriptionId));
    138         }
    139         for (BluetoothStateChangeCallback cb : mChangeCallbacks) {
    140             cb.onBluetoothStateChange(mEnabled);
    141         }
    142     }
    143 }
    144