android 蓝牙设备监听广播

if (action.equals(BluetoothAdapter.ACTION_STATE_CHANGED)) {
    int state = intent.getIntExtra(BluetoothAdapter.EXTRA_STATE,
            BluetoothAdapter.ERROR);
    switch (state) {
        case BluetoothAdapter.STATE_OFF:
            Log.d("aaa", "STATE_OFF 手机蓝牙关闭");
            break;
        case BluetoothAdapter.STATE_TURNING_OFF:
            Log.d("aaa", "STATE_TURNING_OFF 手机蓝牙正在关闭");
            break;
        case BluetoothAdapter.STATE_ON:
            Log.d("aaa", "STATE_ON 手机蓝牙开启");
            break;
        case BluetoothAdapter.STATE_TURNING_ON:
            Log.d("aaa", "STATE_TURNING_ON 手机蓝牙正在开启");
            break;
    }
}

if (action.equals(BluetoothDevice.ACTION_BOND_STATE_CHANGED)) {
    BluetoothDevice device = intent.getParcelableExtra(BluetoothDevice.EXTRA_DEVICE);
    String name = device.getName();
    Log.d("aaa", "device name: " + name);
    int state = intent.getIntExtra(BluetoothDevice.EXTRA_BOND_STATE, -1);
    switch (state) {
        case BluetoothDevice.BOND_NONE:
            Log.d("aaa", "BOND_NONE 删除配对");
            break;
        case BluetoothDevice.BOND_BONDING:
            Log.d("aaa", "BOND_BONDING 正在配对");
            break;
        case BluetoothDevice.BOND_BONDED:
            Log.d("aaa", "BOND_BONDED 配对成功");
            break;
    }
} 

if (action.equals(BluetoothDevice.ACTION_ACL_CONNECTED)) {
    BluetoothDevice device = intent.getParcelableExtra(BluetoothDevice.EXTRA_DEVICE);
    Log.d("aaa", device.getName() + " ACTION_ACL_CONNECTED");
} else if (action.equals(BluetoothDevice.ACTION_ACL_DISCONNECTED)) {
    BluetoothDevice device = intent.getParcelableExtra(BluetoothDevice.EXTRA_DEVICE);
    Log.d("aaa", device.getName() + " ACTION_ACL_DISCONNECTED");
}