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      1 /*
      2  * Copyright (C) 2017 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.settings.bluetooth;
     18 
     19 import android.bluetooth.BluetoothAdapter;
     20 import android.bluetooth.BluetoothDevice;
     21 import android.content.Context;
     22 import android.support.annotation.VisibleForTesting;
     23 import android.util.Log;
     24 
     25 import com.android.settings.R;
     26 import com.android.settings.widget.SummaryUpdater;
     27 import com.android.settingslib.bluetooth.BluetoothCallback;
     28 import com.android.settingslib.bluetooth.CachedBluetoothDevice;
     29 import com.android.settingslib.bluetooth.LocalBluetoothAdapter;
     30 import com.android.settingslib.bluetooth.LocalBluetoothManager;
     31 
     32 import java.util.Collection;
     33 import java.util.Set;
     34 
     35 /**
     36  * Helper class that listeners to bluetooth callback and notify client when there is update in
     37  * bluetooth summary info.
     38  */
     39 public final class BluetoothSummaryUpdater extends SummaryUpdater implements BluetoothCallback {
     40     private static final String TAG = "BluetoothSummaryUpdater";
     41 
     42     private final LocalBluetoothManager mBluetoothManager;
     43     private final LocalBluetoothAdapter mBluetoothAdapter;
     44 
     45     public BluetoothSummaryUpdater(Context context, OnSummaryChangeListener listener,
     46             LocalBluetoothManager bluetoothManager) {
     47         super(context, listener);
     48         mBluetoothManager = bluetoothManager;
     49         mBluetoothAdapter = mBluetoothManager != null
     50                 ? mBluetoothManager.getBluetoothAdapter() : null;
     51     }
     52 
     53     @Override
     54     public void onBluetoothStateChanged(int bluetoothState) {
     55         notifyChangeIfNeeded();
     56     }
     57 
     58     @Override
     59     public void onConnectionStateChanged(CachedBluetoothDevice cachedDevice, int state) {
     60         notifyChangeIfNeeded();
     61     }
     62 
     63     @Override
     64     public void onScanningStateChanged(boolean started) {
     65     }
     66 
     67     @Override
     68     public void onDeviceAdded(CachedBluetoothDevice cachedDevice) {
     69     }
     70 
     71     @Override
     72     public void onDeviceDeleted(CachedBluetoothDevice cachedDevice) {
     73     }
     74 
     75     @Override
     76     public void onDeviceBondStateChanged(CachedBluetoothDevice cachedDevice, int bondState) {
     77     }
     78 
     79     @Override
     80     public void onActiveDeviceChanged(CachedBluetoothDevice activeDevice, int bluetoothProfile) {
     81     }
     82 
     83     @Override
     84     public void onAudioModeChanged() {
     85     }
     86 
     87     @Override
     88     public void register(boolean listening) {
     89         if (mBluetoothAdapter == null) {
     90             return;
     91         }
     92         if (listening) {
     93             notifyChangeIfNeeded();
     94             mBluetoothManager.getEventManager().registerCallback(this);
     95         } else {
     96             mBluetoothManager.getEventManager().unregisterCallback(this);
     97         }
     98     }
     99 
    100     @Override
    101     public String getSummary() {
    102         if (mBluetoothAdapter == null || !mBluetoothAdapter.isEnabled()) {
    103             return mContext.getString(R.string.bluetooth_disabled);
    104         }
    105         switch (mBluetoothAdapter.getConnectionState()) {
    106             case BluetoothAdapter.STATE_CONNECTED:
    107                 return getConnectedDeviceSummary();
    108             case BluetoothAdapter.STATE_CONNECTING:
    109                 return mContext.getString(R.string.bluetooth_connecting);
    110             case BluetoothAdapter.STATE_DISCONNECTING:
    111                 return mContext.getString(R.string.bluetooth_disconnecting);
    112             default:
    113                 return mContext.getString(R.string.disconnected);
    114         }
    115     }
    116 
    117     @VisibleForTesting
    118     String getConnectedDeviceSummary() {
    119         String deviceName = null;
    120         int count = 0;
    121         final Set<BluetoothDevice> devices = mBluetoothAdapter.getBondedDevices();
    122         if (devices == null) {
    123             Log.e(TAG, "getConnectedDeviceSummary, bonded devices are null");
    124             return mContext.getString(R.string.bluetooth_disabled);
    125         } else if (devices.isEmpty()) {
    126             Log.e(TAG, "getConnectedDeviceSummary, no bonded devices");
    127             return mContext.getString(R.string.disconnected);
    128         }
    129         for (BluetoothDevice device : devices) {
    130             if (device.isConnected()) {
    131                 deviceName = device.getName();
    132                 count++;
    133                 if (count > 1) {
    134                     break;
    135                 }
    136             }
    137         }
    138         if (deviceName == null) {
    139             Log.e(TAG, "getConnectedDeviceSummary, deviceName is null, numBondedDevices="
    140                     + devices.size());
    141             for (BluetoothDevice device : devices) {
    142                 Log.e(TAG, "getConnectedDeviceSummary, device=" + device.getName() + "["
    143                         + device.getAddress() + "]" + ", isConnected=" + device.isConnected());
    144             }
    145             return mContext.getString(R.string.disconnected);
    146         }
    147         return count > 1 ? mContext.getString(R.string.bluetooth_connected_multiple_devices_summary)
    148                 : mContext.getString(R.string.bluetooth_connected_summary, deviceName);
    149     }
    150 
    151 }
    152