我收到 google 的 FCM 通知，但我的消息正文是乱码。如何解决？

Question

Post成功，但是邮件正文是乱码

{"data":{"data_content":"测试","data_title":"Joyce"},"notification":{"body":"测试","title":"test"},"to":"myDeviceId"}

this.is我的post代码，有错吗？谢谢

<pre><code>
public class HttpConnection {

    public void startConnection(final String apiUrl, final String jsonStr, final OnPostNotificationListener listener) {
        new Thread(new Runnable() {
            @Override
            public void run() {
                HttpURLConnection conn = null;
                StringBuilder response = new StringBuilder();

                try {
                    URL url = new URL(apiUrl);
                    conn = (HttpURLConnection) url.openConnection();
                    conn.setRequestProperty("Authorization","key=Key");
                    conn.setRequestProperty("Content-Type","application/json");
                    conn.setRequestMethod("POST");
                    conn.setConnectTimeout(10000);
                    conn.setReadTimeout(10000);
                    conn.setDoInput(true);
                    conn.setDoOutput(true);
                    conn.setUseCaches(false);

                    OutputStream os = conn.getOutputStream();
                    DataOutputStream writer = new DataOutputStream(os);
                    writer.writeBytes(jsonStr);
                    writer.flush();
                    writer.close();
                    os.close();
                    //Get Response
                    InputStream is = conn.getInputStream();

                    BufferedReader reader = new BufferedReader(new InputStreamReader(is));
                    String line;

                    while ((line = reader.readLine()) != null) {
                        response.append(line);
                        response.append('\r');
                    }
                    listener.onSuccessful(response.toString());
                    reader.close();
                } catch (Exception ex) {
                    ex.printStackTrace();
                    listener.onFail(ex.toString());
                } finally {
                    if (conn != null) {
                        conn.disconnect();
                    }
                }
            }
        }).start();


    }


    public interface OnPostNotificationListener{
        void onSuccessful(String result);
        void onFail(String exception);
    }

}

</code></pre>

感谢您的帮助。The picture of the phone

Answer 1

问题来自 writeBytes 方法和汉字（或其他非 ISO-8859-1 字符）的表示。您应该改用 writeUTF 方法：

writer.writeUTF(jsonStr);

你可以看看this post explaning the difference between writeBytes and writeUTF。基本上，在编写字符串时应该始终使用 writeUTF。

我收到 google 的 FCM 通知，但我的消息正文是乱码。如何解决？

I got notification from FCM of google, but my messageBody was garbled. How to resolve it?

google-cloud-messaging