在安卓中，进行POST请求返回空响应体可能是由于以下原因导致的：服务器没有正确处理请求、网络连接问题、请求参数不正确等。下面是一些解决方法的代码示例：

1. 检查网络连接：

ConnectivityManager connectivityManager = (ConnectivityManager) getSystemService(Context.CONNECTIVITY_SERVICE);
NetworkInfo networkInfo = connectivityManager.getActiveNetworkInfo();
if (networkInfo != null && networkInfo.isConnected()) {
    // 网络连接正常
    // 进行POST请求
} else {
    // 网络连接失败
}

2. 使用HttpURLConnection发送POST请求：

URL url = new URL("http://example.com/api");
HttpURLConnection connection = (HttpURLConnection) url.openConnection();
connection.setRequestMethod("POST");
connection.setDoOutput(true);
connection.setDoInput(true);

// 设置请求参数
String requestBody = "param1=value1¶m2=value2";
OutputStream outputStream = connection.getOutputStream();
outputStream.write(requestBody.getBytes());
outputStream.flush();
outputStream.close();

// 获取响应
int responseCode = connection.getResponseCode();
if (responseCode == HttpURLConnection.HTTP_OK) {
    // 读取响应体
    InputStream inputStream = connection.getInputStream();
    BufferedReader bufferedReader = new BufferedReader(new InputStreamReader(inputStream));
    String line;
    StringBuilder response = new StringBuilder();
    while ((line = bufferedReader.readLine()) != null) {
        response.append(line);
    }
    bufferedReader.close();
    inputStream.close();

    String responseBody = response.toString();
    // 处理响应体
} else {
    // 请求失败
}
connection.disconnect();

3. 使用OkHttp发送POST请求：

OkHttpClient client = new OkHttpClient();
RequestBody requestBody = new FormBody.Builder()
        .add("param1", "value1")
        .add("param2", "value2")
        .build();

Request request = new Request.Builder()
        .url("http://example.com/api")
        .post(requestBody)
        .build();

try {
    Response response = client.newCall(request).execute();
    if (response.isSuccessful()) {
        String responseBody = response.body().string();
        // 处理响应体
    } else {
        // 请求失败
    }
} catch (IOException e) {
    e.printStackTrace();
}

通过以上代码示例，你可以根据具体情况进行调整和处理，以解决安卓中POST请求返回空响应体的问题。