volley post请求 gzip压缩 json 传输

来源：互联网发布：云计算部署模式哪三种编辑：程序博客网时间：2024/05/16 08:01

这里以post请求说明，get请求相似设置请求头及超时。

1.自定义request，继承com.android.volley.Request

2.构造方法实现（basecallback,为自定义的监听，实现Response.Listener,ErrorListener接口）--post请求

String  params; public  static    int SOCKET_TIMEOUT=20000;public  MyRequest(String url,String params, Response.Listener<String> listener, Response.ErrorListener errorListener){     super(Method.POST,url,listener,errorListener);    this.params=params;}

```
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```

3.请求头设置：重写getHeaders方法

@Override     public Map<String, String> getHeaders() throws AuthFailureError     {  Map<String, String> headers = new HashMap<String, String>();  headers.put("Charset", "UTF-8");  headers.put("Content-Type", "application/x-javascript");  headers.put("Accept-Encoding", "gzip,deflate");  return headers;     }

设置字符集为UTF-8,并采用gzip压缩传输

4.超时设置：重写getRetryPolicy方法

@Override     public RetryPolicy getRetryPolicy()     {  RetryPolicy retryPolicy = new DefaultRetryPolicy(SOCKET_TIMEOUT, DefaultRetryPolicy.DEFAULT_MAX_RETRIES, DefaultRetryPolicy.DEFAULT_BACKOFF_MULT);  return retryPolicy;     }

5.请求参数组装：重写getBody方法

@Override     public byte[] getBody() throws AuthFailureError     {  return params == null ? super.getBody() : params.getBytes();     }

```
6. 接收到gzip的数据 处理
```

@Overrideprotected Response<String> parseNetworkResponse(NetworkResponse response) {    String parsed =getRealString(response.data);    return Response.success(parsed, HttpHeaderParser.parseCacheHeaders(response));}<pre name="code" class="java">private int getShort(byte[] data){    return (int) ((data[0] << 8) | data[1] & 0xFF);}public String getRealString(byte[] data){    byte[] h = new byte[2];    h[0] = (data)[0];    h[1] = (data)[1];    int head = getShort(h);    boolean t = head == 0x1f8b;    InputStream in;    StringBuilder sb = new StringBuilder();    try    {        ByteArrayInputStream bis = new ByteArrayInputStream(data);        if (t)        {            in = new GZIPInputStream(bis);        }        else        {            in = bis;        }        BufferedReader r = new BufferedReader(new InputStreamReader(in), 1000);        for (String line = r.readLine(); line != null; line = r.readLine())        {            sb.append(line);        }        in.close();    }    catch (Exception e)    {        e.printStackTrace();    }    return sb.toString();}

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