如何接收有关 BT 连接状态的通知答案

【问题标题】：How to receive notification regarding the BT connection states如何接收有关 BT 连接状态的通知
【发布时间】：2015-08-25 10:34:40
【问题描述】：

我正在尝试在连接状态更改为“正在连接、已连接、断开连接、断开连接”时接收通知。我注册了 ACTION_CONNECTION_STATE_CHANGED，但我总是在“switch-case”的“default”语句中收到日志。

请让我知道如何正确接收有关以下代码中 switch-case 中提到的状态的通知？

代码：

final int connState = intent.getIntExtra(BluetoothAdapter.EXTRA_CONNECTION_STATE, BluetoothAdapter.ERROR);

            switch (connState) {
            case BluetoothAdapter.STATE_CONNECTED:
                Log.d(TAG, LogAnd.show("onReceive", "BluetoothAdapter.STATE_CONNECTED"));
                tvStatus.setText("BT STATE_CONNECTED.");

                break;
            case BluetoothAdapter.:
                Log.d(TAG, LogAnd.show("onReceive", "BluetoothAdapter.STATE_CONNECTED"));
                tvStatus.setText("BT STATE_CONNECTED.");

                break;
            case BluetoothAdapter.STATE_CONNECTING:
                Log.d(TAG, LogAnd.show("onReceive", "BluetoothAdapter.STATE_CONNECTING"));
                tvStatus.setText("BT is STATE_CONNECTING.");
                break;
            case BluetoothAdapter.STATE_DISCONNECTING:
                Log.d(TAG, LogAnd.show("onReceive", "BluetoothAdapter.STATE_DISCONNECTING"));
                tvStatus.setText("BT STATE_DISCONNECTING.");
                break;
            case BluetoothAdapter.STATE_DISCONNECTED:
                Log.d(TAG, LogAnd.show("onReceive", "BluetoothAdapter.STATE_DISCONNECTED"));
                tvStatus.setText("BT STATE_DISCONNECTED.");
                break;
            default:
                Log.wtf(TAG, LogAnd.show("onReceive", "connState: UNHANDELED CASE."));
                break;
            }
            break;

【问题讨论】：

标签： android android-intent broadcastreceiver intentfilter android-bluetooth

【解决方案1】：

你需要

BluetoothAdapter.EXTRA_STATE

而不是

BluetoothAdapter.EXTRA_CONNECTION_STATE

【讨论】：