Android 获取AT response

在 Android 中获取 AT 命令的响应可以通过串口通信实现。以下是一个简单的示例代码：

public class ATCommand {
    private static final String TAG = "ATCommand";
    private SerialPort mSerialPort;
    private OutputStream mOutputStream;
    private InputStream mInputStream;
    private ReadThread mReadThread;

    public ATCommand(String device, int baudrate) throws IOException {
        mSerialPort = new SerialPort(new File(device), baudrate, 0);
        mOutputStream = mSerialPort.getOutputStream();
        mInputStream = mSerialPort.getInputStream();
        mReadThread = new ReadThread();
        mReadThread.start();
    }

    public void send(String command) {
        try {
            mOutputStream.write((command + "\r\n").getBytes());
        } catch (IOException e) {
            e.printStackTrace();
        }
    }

    private class ReadThread extends Thread {
        @Override
        public void run() {
            while (!isInterrupted()) {
                int size;
                try {
                    byte[] buffer = new byte[64];
                    if (mInputStream == null) return;
                    size = mInputStream.read(buffer);
                    if (size > 0) {
                        String response = new String(buffer, 0, size);
                        Log.d(TAG, "Response: " + response);
                    }
                } catch (IOException e) {
                    e.printStackTrace();
                    return;
                }
            }
        }
    }
}

使用上述代码，你可以通过以下方式来获取 AT 命令的响应：

ATCommand atCommand = new ATCommand("/dev/ttyS0", 115200);
atCommand.send("AT");

在上述代码中，我们通过 `mOutputStream.write()` 方法将 AT 命令发送给串口设备，并通过 `mInputStream.read()` 方法读取响应结果。最后，我们将响应结果输出到日志中。