Java inputstream read() 没有得到完整的字节数组数据

Question

嵌入式系统项目，在该项目中，我将使用蓝牙模块从我的微控制器获得对 android 设备的一些响应，但我无法从该行 bytes = "mmInStream.read(buffer)" 获取字节。当我使用这个将 byte[] 缓冲区转换为 String 时 String data=new String(bytes) 我没有正确获取从我的微控制器发送的数据。有时字符丢失..

     public void run() {
        Log.i(TAG, "BEGIN mConnectedThread");
        byte[] buffer = new byte[1024];
        int bytes;

        // Keep listening to the InputStream while connected
        while (true) {
            try {
                // Read from the InputStream
                bytes = mmInStream.read(buffer);

                String data=new String(bytes);         
                System.out.println(data);          

                // Send the obtained bytes to the UI Activity

            } catch (IOException e) {
                Log.e(TAG, "disconnected", e);
                connectionLost();
                break;
            }
        }
    }

请帮帮我

Answer 1

请尝试使用 BufferedReader。

It reads text from a character-input stream, buffering characters so as to provide for the efficient reading of characters, arrays, and lines.

如果您使用 Java 7 或更早版本，以下代码将有所帮助：

try (BufferedReader reader = new BufferedReader(new InputStreamReader(mmInStream))){
        String line = null;
        while((line = reader.readLine()) != null) {
        System.out.println(line);
        }
        connectionLost();
    } catch(IOException e) {
        e.printStackTrace();
    }

如果您使用 Java 6 或更小的版本，请使用此代码：

BufferedReader reader = null;
    try {
        reader = new BufferedReader(new InputStreamReader(mmInStream));
        String line = null;
        while ((line = reader.readLine()) != null) {
        System.out.println(line);
        }
    } catch (IOException e) {
        e.printStackTrace();
    } finally {
        if (reader != null) {
        try {
            reader.close();
        } catch (IOException e) {
            e.printStackTrace();
        }
        }
        connectionLost();
    }

但是这种方法有缺点。您可以阅读有关它们的信息，例如here

Java inputstream read() 没有得到完整的字节数组数据

Java inputstream read() not get full byte array data

java

embedded

bluetooth

inputstream