Question

我正在开发一个应用程序，我必须连接到Android 4.3上的蓝牙设备。

我希望在使用getConnectedDevices()连接BLE设备之后使用mBluetoothGatt.connect()，如下面的代码来获取连接的设备，但是无效。

    @Override
    public void onServiceDisconnected(int profile) {
        // TODO Auto-generated method stub
        Log.v(TAG, "profile1" + profile);
        Log.v(TAG, "BluetoothProfile.HEADSET1 = " + BluetoothProfile.HEADSET);
        if(profile == BluetoothProfile.HEADSET) {
            mBluetoothHeadset  = null;
        }
    }

    @Override
    public void onServiceConnected(int profile, BluetoothProfile proxy) {
        // TODO Auto-generated method stub
        Log.v(TAG, "profile2 " + profile);
        Log.v(TAG, "BluetoothProfile.HEADSET2 = " + BluetoothProfile.HEADSET);
        if(profile == BluetoothProfile.HEADSET) {
            mBluetoothHeadset  = (BluetoothHeadset) proxy;

            Log.v(TAG, "mBluetoothHeadset = " + mBluetoothHeadset);
            List<BluetoothDevice> devicelist = mBluetoothHeadset.getConnectedDevices();
            Log.v(TAG, "mBluetoothHeadset.getConnectedDevices = " + mBluetoothHeadset.getConnectedDevices());
            Log.v(TAG, "devicelist = " + devicelist);
            for(BluetoothDevice dev : devicelist) {
                Log.v(TAG, "connectedDevices = " + dev);
            }
        }
    }
    };



@Override
    protected void onNewIntent(Intent intent) {
        // TODO Auto-generated method stub
        super.onNewIntent(intent);
        setIntent(intent);

    mBluetoothAdapter = BluetoothAdapter.getDefaultAdapter();
    mBluetoothAdapter.getProfileProxy(Main.this, mProfileListener, BluetoothProfile.HEADSET);




}

从日志中看到，它没有调用函数getConnectedDevices（）; 日志是：

D/BluetoothHeadset( 3454): Proxy object connected
V/Main    ( 3454): profile2 = 1
V/Main    ( 3454): BluetoothProfile.HEADSET2 = 1
V/Main    ( 3454): mBluetoothHeadset = android.bluetooth.BluetoothHeadset@4a99cddc
V/Main    ( 3454): mBluetoothHeadset.getConnectedDevices = []
V/Main    ( 3454): devicelist = []

连接列表是空的，我确定我有一个连接的BLE设备。我的代码中有什么问题吗？

使用getConnectedDevices（）获取连接BLE的设备在Android 4.3中无效

0 个答案: