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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 register(boolean listening) {
     81         if (mBluetoothAdapter == null) {
     82             return;
     83         }
     84         if (listening) {
     85             notifyChangeIfNeeded();
     86             mBluetoothManager.getEventManager().registerCallback(this);
     87         } else {
     88             mBluetoothManager.getEventManager().unregisterCallback(this);
     89         }
     90     }
     91 
     92     @Override
     93     public String getSummary() {
     94         if (mBluetoothAdapter == null || !mBluetoothAdapter.isEnabled()) {
     95             return mContext.getString(R.string.bluetooth_disabled);
     96         }
     97         switch (mBluetoothAdapter.getConnectionState()) {
     98             case BluetoothAdapter.STATE_CONNECTED:
     99                 return getConnectedDeviceSummary();
    100             case BluetoothAdapter.STATE_CONNECTING:
    101                 return mContext.getString(R.string.bluetooth_connecting);
    102             case BluetoothAdapter.STATE_DISCONNECTING:
    103                 return mContext.getString(R.string.bluetooth_disconnecting);
    104             default:
    105                 return mContext.getString(R.string.disconnected);
    106         }
    107     }
    108 
    109     @VisibleForTesting
    110     String getConnectedDeviceSummary() {
    111         String deviceName = null;
    112         int count = 0;
    113         final Set<BluetoothDevice> devices = mBluetoothAdapter.getBondedDevices();
    114         if (devices == null) {
    115             Log.e(TAG, "getConnectedDeviceSummary, bonded devices are null");
    116             return mContext.getString(R.string.bluetooth_disabled);
    117         } else if (devices.isEmpty()) {
    118             Log.e(TAG, "getConnectedDeviceSummary, no bonded devices");
    119             return mContext.getString(R.string.disconnected);
    120         }
    121         for (BluetoothDevice device : devices) {
    122             if (device.isConnected()) {
    123                 deviceName = device.getName();
    124                 count++;
    125                 if (count > 1) {
    126                     break;
    127                 }
    128             }
    129         }
    130         if (deviceName == null) {
    131             Log.e(TAG, "getConnectedDeviceSummary, deviceName is null, numBondedDevices="
    132                     + devices.size());
    133             for (BluetoothDevice device : devices) {
    134                 Log.e(TAG, "getConnectedDeviceSummary, device=" + device.getName() + "["
    135                         + device.getAddress() + "]" + ", isConnected=" + device.isConnected());
    136             }
    137             return mContext.getString(R.string.disconnected);
    138         }
    139         return count > 1 ? mContext.getString(R.string.bluetooth_connected_multiple_devices_summary)
    140                 : mContext.getString(R.string.bluetooth_connected_summary, deviceName);
    141     }
    142 
    143 }
    144