我如何实际配对和连接蓝牙设备。的Android

Question

我很难为最新版本的Android找到这个问题的答案。

我想完全务实地连接到蓝牙设备或蓝牙串行模块。我知道设备的名称和引脚，并且我打算在我最初超出范围的情况下尝试连续连接到设备，或者出于某种原因断开连接。

我有以下代码，需要使用必要的蓝牙代码填充它。

// Connect the bluetooth adaptor
    BA = BluetoothAdapter.getDefaultAdapter();
    Toast.makeText(getApplicationContext(),"Checking bluetooth...",Toast.LENGTH_LONG).show();
    if (!BA.isEnabled()) {
        Intent turnOn = new Intent(BluetoothAdapter.ACTION_REQUEST_ENABLE);
        startActivityForResult(turnOn, 0);
        Toast.makeText(getApplicationContext(),"Adaptor enabled",Toast.LENGTH_LONG).show();
    } else {
        Toast.makeText(getApplicationContext(),"Adaptor already enabled", Toast.LENGTH_LONG).show();
    }

// Start a background thread that attempts to connect to the board
    Runnable bluetoothBackgroundRunnable = new Runnable() {
        String bluetoothID = "ID GOES HERE";   // TODO: Change this to device name!
        String securePin = "1234";             // TODO: Change this to device pin!
        @Override
        public void run() {
            // Attempt to connect...
            Toast.makeText(getApplicationContext(),"Attempting to connect...", Toast.LENGTH_LONG).show();
            Intent intent = new Intent(BluetoothDevice.ACTION_PAIRING_REQUEST);

            bluetoothConnectHandler.postDelayed(this, 1000);
        }
    };
    bluetoothConnectHandler.postDelayed(bluetoothBackgroundRunnable, 100);