处理unicode ,如何摆脱？安卓/ JAVA

Question

我正在使用终端仿真器库来创建终端,然后我用它将串行输入的数据发送到串行设备.图书馆可以在这里看到.

当我向终端输入数据时,正在发送/接收一系列奇怪的字符.我认为unicode替换字符是通过串行发送的,串行设备不知道它是什么并返回〜0.

我写"test"时终端中显示的内容的屏幕截图:

并显示发送的字符串和收到的数据的日志.

我创建了一个EmulatorView,它是终端视图.它在这里提到钻石.

private void sendText(CharSequence text) {
                int n = text.length();
                char c;
                try {
                    for(int i = 0; i < n; i++) {
                        c = text.charAt(i);
                        if (Character.isHighSurrogate(c)) {
                            int codePoint;
                            if (++i < n) {
                                codePoint = Character.toCodePoint(c, text.charAt(i));
                            } else {
                                // Unicode Replacement Glyph, aka white question mark in black diamond.
                                codePoint = '\ufffd';
                            }
                            mapAndSend(codePoint);
                        } else {
                            mapAndSend(c);
                        }
                    }
                } catch (IOException e) {
                    Log.e(TAG, "error writing ", e);
                }
            }

有没有什么办法解决这一问题？任何人都可以在库类中看到为什么会发生这种情况吗？如果我想的话,如何在java中引用to甚至解析它？我不能说是否(!str.contains(" ")我接受它.

当我输入终端时,运行:

public void write(byte[] bytes, int offset, int count) {


 String str;
try {
    str = new String(bytes, "UTF-8");
      Log.d(TAG, "data received in write: " +str );

      GraphicsTerminalActivity.sendOverSerial(str.getBytes("UTF-8"));
} catch (UnsupportedEncodingException e) {
    Log.d(TAG, "exception" );
    e.printStackTrace();
}

        // appendToEmulator(bytes, 0, bytes.length);

 return;
}

这就是我所说的发送数据.sendData(Byte [] data)是一个库方法.

public static void sendOverSerial(byte[] data) {
        String str;
        try {
            str = new String(data,"UTF-8");
             if(mSelectedAdapter !=null && data !=null){
                 Log.d(TAG, "send over serial string==== " + str);

                mSelectedAdapter.sendData(str.getBytes("UTF-8"));
                 }
        } catch (UnsupportedEncodingException e) {
            Log.d(TAG, "exception");
            e.printStackTrace();
        }

    }

发送数据后,会在此处收到回复:

public void onDataReceived(int id, byte[] data) {

        try {
            dataReceived = new String(data, "UTF-8");
        } catch (UnsupportedEncodingException e) {
            Log.d(TAG, "exception");
            e.printStackTrace();
        }

        try {
            dataReceivedByte = dataReceived.getBytes("UTF-8");
        } catch (UnsupportedEncodingException e) {
            Log.d(TAG, "exception");
            e.printStackTrace();
        }
        statusBool = true;
        Log.d(TAG, "in data received " + dataReceived);
        ((MyBAIsWrapper) bis).renew(data);


        runOnUiThread(new Runnable(){

            @Override
            public void run() {

                mSession.appendToEmulator(dataReceivedByte, 0, dataReceivedByte.length);

            }});

    viewHandler.post(updateView);

}

库类的相关部分,其中写有字符:

课程相关部分:

private void sendText(CharSequence text) {
                int n = text.length();
                char c;
                try {
                    for(int i = 0; i < n; i++) {
                        c = text.charAt(i);
                        if (Character.isHighSurrogate(c)) {
                            int codePoint;
                            if (++i < n) {
                                codePoint = Character.toCodePoint(c, text.charAt(i));
                            } else {
                                // Unicode Replacement Glyph, aka white question mark in black diamond.
                                codePoint = '\ufffd';
                            }
                            mapAndSend(codePoint);
                        } else {
                            mapAndSend(c);
                        }
                    }
                } catch (IOException e) {
                    Log.e(TAG, "error writing ", e);
                }
            }

            private void mapAndSend(int c) throws IOException {
                int result = mKeyListener.mapControlChar(c);
                if (result < TermKeyListener.KEYCODE_OFFSET) {
                    mTermSession.write(result);
                } else {
                    mKeyListener.handleKeyCode(result - TermKeyListener.KEYCODE_OFFSET, getKeypadApplicationMode());
                }
                clearSpecialKeyStatus();
            }

Answer 1

我通过编辑我正在使用的库解决了这个问题。他们使用了一种将字节转换为 int 的方法，它接受一个 codePoint 并将其转换。因此，每次按键都会使用 4 个字节。我对此进行了更改，以便使用字节而不是整数。不再有额外的字节。与编码格式无关。