Question

这是我的代码：

public class HttpClient {
public String AddressBase = "";

String _AccessToken = "";
String _AccessToken = "";

public HttpClient() {
}

public HttpClient(String accessToken) {
    _AccessToken = accessToken;
}

private HttpURLConnection  _CreateConnection(String url, final ArrayList<Pair<String, String>> params) throws IOException {
    Uri.Builder uriB1 = Uri.parse(AddressBase).buildUpon()
            .appendEncodedPath(url);
    if (params != null)
        for (Pair<String, String> p :
                params) {
            uriB1 = uriB1.appendQueryParameter(p.first, p.second);
        }
    URL callUrl = new URL(uriB1.build().toString());
    HttpURLConnection connection = (HttpURLConnection) callUrl.openConnection();
    if (!_AccessToken.isEmpty())
        connection.setRequestProperty("Authorization", "Bearer " + _AccessToken);
    return connection;
}

private <T, Y> Y _Post(final String url, final ArrayList<Pair<String, String>> params, final T object, final Class<Y> objectClass) {
    Log.e("check net", "_post");
    return _Post(url, params, AppConstants.Gson_Get().toJson(object), "application/json", objectClass);
}

private <Y> Y _Post(final String url, final ArrayList<Pair<String, String>> params, final String postBodyContent, String postBodyContentType, final Class<Y> objectClass) {
    Y r = null;
    HttpURLConnection connection = null;
    try {
        Log.e("tag", " try create connection");
        connection = _CreateConnection(url, params);
        connection.setRequestMethod("POST");
        connection.setRequestProperty("Accept", "application/json");
        connection.setRequestProperty("Content-type", postBodyContentType);
        connection.setRequestProperty("Accept-Encoding", "gzip");
        connection.setDoInput(true);
        connection.setDoOutput(true);
        connection.setUseCaches(false);

        if (postBodyContent != null && !postBodyContent.isEmpty()) {
            OutputStreamWriter wr = new OutputStreamWriter(connection.getOutputStream(), "UTF-8");
            wr.write(postBodyContent);
            wr.flush();
        }
        connection.connect();
        Log.e("tag", "  connection connected");

        if (connection.getResponseCode() == HttpURLConnection.HTTP_OK) {
            InputStream inputStream = connection.getInputStream();
            String h1 = connection.getHeaderField("Content-Encoding");
            if (h1 != null && h1.equalsIgnoreCase("gzip")) {
                inputStream = new GZIPInputStream(inputStream);
            }
            String resultString = _ConvertStreamToString(inputStream);
            inputStream.close();
            r = AppConstants.Gson_Get().fromJson(resultString, objectClass);
        }
    } catch (UnsupportedEncodingException e) {
        e.printStackTrace();  //To change body of catch statement use File | Settings | File Templates.
    } catch (IOException e) {
        e.printStackTrace();  //To change body of catch statement use File | Settings | File Templates.
    } catch (Exception e) {
        e.printStackTrace();  //To change body of catch statement use File | Settings | File Templates.
    }
    if (connection != null)
        connection.disconnect();
    return r;
}

private String _ConvertStreamToString(InputStream inputStream) {
    Log.e("checknet", "cnovert stram to string");
    BufferedReader bufferedReader = new BufferedReader(new InputStreamReader(inputStream));
    StringBuilder stringBuilder = new StringBuilder();
    String line = null;
    try {
        while ((line = bufferedReader.readLine()) != null) {
            stringBuilder.append(line + "\n");
        }
    } catch (IOException e) {
        e.printStackTrace();  //To change body of catch statement use File | Settings | File Templates.
    } finally {
        try {
            inputStream.close();
        } catch (IOException e) {
            e.printStackTrace();  //To change body of catch statement use File | Settings | File Templates.
        }
    }

    return stringBuilder.toString();
}

public <T, Y> Y Post(final String url, final T object, final Class<Y> objectClass) {
    return _Post(url, null, object, objectClass);
}

public <T> T PostParamsInQuery(String url, final ArrayList<Pair<String, String>> params, final Class<T> objectClass) {
    return _Post(url, params, null, "application/json", objectClass);
}

public <T> T PostParamsInBody(String url, final ArrayList<Pair<String, String>> params, final Class<T> objectClass) {
    StringBuilder postBodyContent = new StringBuilder("");
    for (Pair<String, String> p :
            params) {
        try {
            if (postBodyContent.length() != 0)
                postBodyContent.append('&');
            postBodyContent.append(URLEncoder.encode(p.first, "UTF-8"));
            postBodyContent.append("=");
            postBodyContent.append(URLEncoder.encode(p.second, "UTF-8"));
        } catch (Exception e) {
        }
    }
    return _Post(url, null, postBodyContent.toString(), "application/x-www-form-urlencoded", objectClass);
}

public <T> T Get(String url, final ArrayList<Pair<String, String>> params, final Class<T> objectClass) {
    T r = null;
    HttpURLConnection connection = null;
    try {
        connection = _CreateConnection(url, params);
        connection.setRequestMethod("GET");
        connection.setRequestProperty("Accept", "application/json");
        connection.setRequestProperty("Accept-Encoding", "gzip");
        connection.setDoInput(true);
        connection.setUseCaches(false);
        connection.connect();
        if (connection.getResponseCode() == HttpURLConnection.HTTP_OK) {
            InputStream inputStream = connection.getInputStream();
            if (connection.getHeaderField("Content-Encoding").equalsIgnoreCase("gzip")) {
                inputStream = new GZIPInputStream(inputStream);
            }
            String resultString = _ConvertStreamToString(inputStream);
            inputStream.close();
            r = AppConstants.Gson_Get().fromJson(resultString, objectClass);
        }
    } catch (UnsupportedEncodingException e) {
        e.printStackTrace();  //To change body of catch statement use File | Settings | File Templates.
    } catch (IOException e) {
        e.printStackTrace();  //To change body of catch statement use File | Settings | File Templates.
    }
    if (connection != null)
        connection.disconnect();
    return r;
}

public boolean Delete(String url, final ArrayList<Pair<String, String>> params) {
    boolean r = false;
    HttpURLConnection connection = null;
    try {
        connection = _CreateConnection(url, params);
        connection.setRequestMethod("DELETE");
        connection.setDoInput(true);
        connection.connect();
        r = connection.getResponseCode() == HttpURLConnection.HTTP_NO_CONTENT;
    } catch (IOException e) {
        e.printStackTrace();  //To change body of catch statement use File | Settings | File Templates.
    }
    if (connection != null)
        connection.disconnect();
    return r;
}

public <T, Y> Y InvokeApi(String apiName, final T arg, Class<Y> returnClass) {
    return Post(String.format("/api/%s", apiName), arg, returnClass);
}

public <T, Y> void InvokeApiAsync(final String apiName, final T arg, final Class<Y> returnClass, final ActionListener<Y> listener) {
    new AsyncTask<Void, Void, Y>() {
        @Override
        protected Y doInBackground(Void... params) {
            return InvokeApi(apiName, arg, returnClass);
        }

        @Override
        protected void onPostExecute(Y result) {
            if (listener != null) {
                listener.Action(result);
            }

        }
    }.executeOnExecutor(AsyncTask.THREAD_POOL_EXECUTOR);
 }

}

当我调用InvokeApiAsync时，由于.getoutputstream（），需要很长时间才能得到响应3分钟。我一直在使用AsyncTask进行并行连接。我不知道该怎么办我会感激任何帮助。

Answer 1

之前我遇到过这个问题，请检查您的设备上的网络（可能是WiFi）代理，然后测试您的代码！

Android尝试连接到代理，如果失败（代理不正确或代理速度很慢），它会等待很长时间（默认）来获取outputStream。

关闭代理或将超时设置为较小的值以更快获得超时异常！

Answer 2

最好使用IntentService而不是AsyncTask进行API连接。

httpurlconnection.getoutputstream（）需要2分钟

2 个答案: