實現功能：藍芽配對

在上篇的基礎上，配對第一個找到的藍芽裝置
1、重寫Handler中找到藍芽裝置後的邏輯

/** 判斷是否是第一個發現的藍芽裝置*/
private boolean hasFindOneDevice = false;
case ACTION_FOND:
                    Intent intentFond = (Intent) msg.obj;
                    if (!hasFindOneDevice) {// //連線該藍芽裝置
                        BluetoothDevice findFirstdevice = intentFond
                                .getParcelableExtra(BluetoothDevice.EXTRA_DEVICE);
                        Log.i(TAG,"第一個發現的藍芽:"
 
 + findFirstdevice.getName());

                        if (findFirstdevice.getBondState() == BluetoothDevice.BOND_NONE) {
    // 利用反射方法呼叫 BluetoothDevice.createBond(BluetoothDevice remoteDevice);
                            Method createBondMethod;
                            try {
                                createBondMethod = BluetoothDevice.class
                                        .getMethod("createBond"
 
);
                                createBondMethod.invoke(findFirstdevice);
                            } catch (Exception e) {
                                e.printStackTrace();
                            }
                            hasFindOneDevice = true;

                        } else {
                            BluetoothDevice finddevice = intentFond
                                    .getParcelableExtra(BluetoothDevice.EXTRA_DEVICE);
                            Log.i(TAG, "find device:"
 
 + finddevice.getName());

                        }
                    }

獲取配對資訊：首先，在BroadCast中註冊該Action

btDiscoveryFilter.addAction(BluetoothDevice.ACTION_BOND_STATE_CHANGED);// 指明一個遠端裝置的連線狀態的改變

在自定義的receiver中新增裝置狀態改變的情況

else if (BluetoothDevice.ACTION_BOND_STATE_CHANGED
                            .equals(action)) {// 遠端裝置的連線狀態改變
                        Log.e(TAG, "接收到 action=BluetoothDevice.ACTION_BOND_STATE_CHANGED");
                        msg.what = BOND_STATE_CHANGE;
                        handler.sendMessage(msg);
                    }

設定狀態改變時要執行的邏輯程式碼

case BOND_STATE_CHANGE:
                    Intent intent2 = (Intent) msg.obj;
                    final BluetoothDevice stateChangeDevice = intent2
                            .getParcelableExtra(BluetoothDevice.EXTRA_DEVICE);
                    Log.e(TAG, "藍芽裝置的狀態" + stateChangeDevice.getBondState());
                    switch (stateChangeDevice.getBondState()) {
                    case BluetoothDevice.BOND_BONDING:
                        Log.e(TAG, "正在配對......");
                        break;
                    case BluetoothDevice.BOND_BONDED:
                        Log.e(TAG, "完成配對");
                        break;
                    case BluetoothDevice.BOND_NONE:
                        Log.e(TAG, "取消配對");
                        break;
                    default:
                        break;
                    }

效果圖