json 请求的数据在 volley 请求中有奇怪的字符

Question

我正在发出 Json 请求，我获取了数据并将其放在列表视图中，但我获取的一些字符串带有重音符号或“ç”，并且显示不正确。例如，字符串是 'Bragança'，我收到 'BraganÃ§a' 或 'à' 并得到 'Ã'。如果我在浏览器中执行请求，一切正常。我的要求。

public void makeJsonArrayRequest() {

    RequestQueue queue = AppController.getInstance().getRequestQueue();
    queue.start();
    JsonArrayRequest Req = new JsonArrayRequest(urlJsonObjUtilizadas,
            new Response.Listener<JSONArray>() {
                @Override
                public void onResponse(JSONArray response) {
                    Log.d(TAG, response.toString());
                    // Parsing json

                    for (int i = 0; i < response.length(); i++) {
                        try {
                            JSONObject ementaObj = response.getJSONObject(i);
                            Ementa ementa = new Ementa();


                            ementa.setCantina(ementaObj.getString("cantina"));
                            ementa.setDescricao(ementaObj.getString("descricao"));
                            ementa.setEmenta(ementaObj.getString("ementa"));
                            ementa.setPreco(ementaObj.getInt("preco"));

                            ementaItems.add(ementa);

                        } catch (JSONException e) {
                            e.printStackTrace();
                        }
                    }
                    // notifying list adapter about data changes
                    adapter.notifyDataSetChanged();
                }
            }, new Response.ErrorListener() {
        @Override
        public void onErrorResponse(VolleyError error) {
            VolleyLog.d(TAG, "Error: " + error.getMessage());

        }
    }) {
        //**
        // Passing some request headers
        //*
        @Override
        public Map<String, String> getHeaders()  {
            HashMap<String, String> headers = new HashMap<String, String>();
            headers.put("Content-Type", "application/json; charset=UTF-8");
            return headers;
        }
    };
    // Add the request to the RequestQueue.
    AppController.getInstance().addToRequestQueue(Req);
}

Answer 1

请尝试使用此代码以 utf-8 编码发送和接收 JSON：

try {
    URL url = new URL("your url");
    HttpURLConnection conn = (HttpURLConnection) url.openConnection();

    conn.setDoOutput(true);

    OutputStreamWriter writer = new OutputStreamWriter(
            conn.getOutputStream(), "UTF-8");
    String request = "your json";
    writer.write(request);
    writer.flush();
    System.out.println("Code:" + conn.getResponseCode());
    System.out.println("mess:" + conn.getResponseMessage());

    String response = "";
    BufferedReader reader = new BufferedReader(new InputStreamReader(
            conn.getInputStream(), "UTF-8"));
    String line;
    while ((line = reader.readLine()) != null) {
        response += line;
    }

    System.out.println(new String(response.getBytes(), "UTF8"));
    writer.close();
    reader.close();
} catch (MalformedURLException e) {
    e.printStackTrace();
} catch (IOException e) {
    e.printStackTrace();
}

Answer 2

我认为这是因为内容类型编码错误 header。您应该使用 UTF-8 作为编码。也许这在浏览器中有效，因为 header 不是 case-sensitive（不像 Android）。查看 here 以获取解决方案。本质上，它们是手动覆盖字符集。

Answer 3

您应该将请求 header 字符集添加到 UTF-8。例如，如果您的请求是 json，您应该将此 header 添加到请求中：

"Content-type": "Aplicación/json; utf-8"

我也用 Volley，这种方式适合我。

此致。

Answer 4

检查这个示例，我正在使用这种方式，查看 header 部分

public class Estratek_JSONString extends JsonRequest<String>{
Activity Act;
Priority priority;

public Estratek_JSONString(int m, String url, JSONObject params,
        Listener<String> listener, ErrorListener errorListener,Activity act, Priority p)  {
    super(m,url,params.toString(),listener,errorListener); 

    this.Act=act;
    this.priority=p;    
} 
public Estratek_JSONString(int m, String url,
        Listener<String> listener, ErrorListener errorListener,Activity act, Priority p)  {
    // super constructor

    //super(m,url,params.toString(),listener,errorListener);
    super(m,url,null,listener,errorListener);

    this.Act=act;
    this.priority=p;    
} 

@Override
public Map<String, String> getHeaders()  {
        HashMap<String, String> headers = new HashMap<String, String>();
        headers.put("Content-Type", "application/json; charset=utf-8");
        headers.put("Authorization", "Bearer "+Tools.Get_string(Act.getApplicationContext(),Global_vars.Access_token));
        return headers;
    }

//it make posible send parameters into the body.
  @Override
  public Priority getPriority(){
    return priority;
 }

  @Override
    protected Response<String> parseNetworkResponse(NetworkResponse response) {
        try {
            String jsonString =
                new String(response.data, HttpHeaderParser.parseCharset(response.headers));
            return Response.success(new String(jsonString),
                    HttpHeaderParser.parseCacheHeaders(response));
        } catch (UnsupportedEncodingException e) { 
            return Response.error(new ParseError(e));
        }
    }

}

json 请求的数据在 volley 请求中有奇怪的字符

Data of json request with strange characters in volley request

java

android

json

android-studio

android-volley