Volley 请求/接收内容 GZIP压缩

往后端传输json字符串为例，其余类型同样做法

自己设置Request继承Volley自带的StringRequest

GzipRequest.java

public class GzipRequest extends StringRequest {    private String mData = null;    public GzipRequest(String url, Response.Listener<String> listener, @Nullable Response.ErrorListener errorListener) {        super(url, listener, errorListener);    }    public GzipRequest(String url,String data, Response.Listener<String> listener, @Nullable Response.ErrorListener errorListener) {        super(Method.POST,url, listener, errorListener);        mData = data;    }    @Override    public Map<String, String> getHeaders() throws AuthFailureError {        Map<String,String> headers = new HashMap<String, String>();         headers.put("Charset", "UTF-8");        headers.put("Accept-Encoding", "gzip,deflate");//用户端允许接收GZIP        headers.put("Content-Encoding", "gzip");//用户端发送GZIP内容        headers.put("Content-Type", "application/json");//根据后端要求，觉得Content-Type类型        return headers;    }    @Override    public RetryPolicy getRetryPolicy() {        return new DefaultRetryPolicy();        //setRetryPolicy(RetryPolicy policy);可自己设置超时时间，重试次数等参数    }    @Override    public byte[] getBody() throws AuthFailureError {        return mData == null ? super.getBody() : compress(mData);    }    @Override    protected Response<String> parseNetworkResponse(NetworkResponse response) {        String result = uncompress(response.data);        return Response.success(result, HttpHeaderParser.parseCacheHeaders(response));        //return super.parseNetworkResponse(response);    }    @Override    protected void deliverResponse(String response) {    }    private byte[] compress(String str) {        try (ByteArrayOutputStream outStream = new ByteArrayOutputStream()) {            try (GZIPOutputStream gzip = new GZIPOutputStream(outStream)) {                gzip.write(str.getBytes(StandardCharsets.UTF_8));            }            return out.toByteArray();        }catch (Exception E){            return new byte[0];        }    }    private String uncompress(byte[] str){        ByteArrayOutputStream baos = new ByteArrayOutputStream();        try (GZIPInputStream gis = new GZIPInputStream(new ByteArrayInputStream(str))) {            int b;            while ((b = gis.read()) != -1) {                baos.write((byte) b);            }        }catch (Exception e){            return "";        }        return new String(baos.toByteArray(), StandardCharsets.UTF_8);    }}

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