Question

在我的应用中，我正在尝试对我的设备的蓝牙（BT）被禁用时的情况作出反应。但是，当连接到我的手机的其他设备断开或关闭时，似乎会报告ACTION_BOND_STATE_CHANGED（检查this和this答案），至少在我的情况下。如果我注册ACTION_ACL_DISCONNECTED然后关闭我的设备BT，则调用onReceive（）。

init {
    fetchDevices()

    val mBTPairedReceiver = object : BroadcastReceiver() {
        override fun onReceive(context: Context, intent: Intent) {
            val action = intent.action
            val device = intent.getParcelableExtra<Parcelable>(BluetoothDevice.EXTRA_DEVICE)
            val previousStates = intent.getIntExtra(BluetoothDevice.EXTRA_PREVIOUS_BOND_STATE, BluetoothAdapter.ERROR)
            val states = intent.getIntExtra(BluetoothDevice.EXTRA_BOND_STATE, BluetoothAdapter.ERROR)

            when (action) {
                BluetoothDevice.ACTION_FOUND -> if (device != null) {
                    fetchDevices()
                    deviceListener?.let { it(devices) }
                }
                BluetoothDevice.ACTION_BOND_STATE_CHANGED -> {

                    when (states) {
                        BluetoothAdapter.STATE_TURNING_OFF -> {
                            Log.d("MESSAGE", "BT is turning OFF")
                        }
                        BluetoothAdapter.STATE_ON -> Log.d("MESSAGE", "BT is ON now")

                    }
                }
            }

        }
    }


    application.registerReceiver(mBTPairedReceiver, IntentFilter(BluetoothDevice.ACTION_BOND_STATE_CHANGED))

}

我想知道我的设备上是否要关闭/关闭BT，以便在丢失连接之前将最终消息发送到我连接的另一台设备。

Answer 1

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private final BroadcastReceiver btReceiver = new BroadcastReceiver() {
        public void onReceive(Context context, Intent intent) {
            String action = intent.getAction();
            if (action.equals(btAdapter.ACTION_STATE_CHANGED)) {
                final int state = intent.getIntExtra(BluetoothAdapter.EXTRA_STATE, btAdapter.ERROR);
                switch(state){
                    case BluetoothAdapter.STATE_OFF:
                        Log.d(TAG, "btReceiver: STATE OFF");
                        break;
                    case BluetoothAdapter.STATE_TURNING_OFF:
                        Log.d(TAG, "btReceiver: STATE TURNING OFF");
                        break;
                    case BluetoothAdapter.STATE_ON:
                        Log.d(TAG, "btReceiver: STATE ON");
                        break;
                    case BluetoothAdapter.STATE_TURNING_ON:
                        Log.d(TAG, "btReceiver: STATE TURNING ON");
                        break;
                }
            }
        }
    };

检测设备的蓝牙何时被禁用

1 个答案: