Volley Get網絡請求

public class VolleyActivity extends AppCompatActivity {    WebView webView;    Button button;    RequestQueue queue = null;    @Override    protected void onCreate(Bundle savedInstanceState) {        super.onCreate(savedInstanceState);        setContentView(R.layout.activity_volley);        webView = (WebView) findViewById(R.id.web);        button = (Button) findViewById(R.id.volleybtn);        button.setOnClickListener(new View.OnClickListener() {            @Override            public void onClick(View v) {                dostringVolley();            }        });    }    /*get請求*/    public void dostringVolley(){        /*第一步，建立請求隊列*/        queue = Volley.newRequestQueue(this);        /*第二步，建立請求對象*/        StringRequest stringRequest = new StringRequest(                Request.Method.GET,           //當改爲post方法時：Request.Method.POST                "http://apis.baidu.com/txapi/tiyu/tiyu?num=10",                new Response.Listener<String>() {                    @Override                    public void onResponse(String response) {                        String s = response;                        webView.getSettings().setJavaScriptEnabled(true);                        webView.getSettings().setDefaultTextEncodingName("UTF-8");                        webView.loadDataWithBaseURL(null,s,"text/html","UTF-8",null);                    }                },                new Response.ErrorListener() {                    @Override                    public void onErrorResponse(VolleyError error) {                        webView.loadDataWithBaseURL(null,"網絡請求失敗","text/html","UTF-8",null);                    }                }        )            /*getHeaders匿名內部類，獲取頭部，即獲取apikey，對get方法和post方法都適用*/        {            @Override            public Map<String, String> getHeaders() throws AuthFailureError {                Map<String,String> map = new HashMap<String, String>();                map.put("apikey","96c52acc3831b95cf4a5c6f0e23ea209");                return map;            }            /*重寫方法，完成轉碼*/            @Override            protected Response<String> parseNetworkResponse(                    NetworkResponse response) {                try {                    String jsonObject = new String(                            new String(response.data, "UTF-8"));                    return        Response.success(jsonObject, HttpHeaderParser.parseCacheHeaders(response));                } catch (UnsupportedEncodingException e) {                    return Response.error(new ParseError(e));                } catch (Exception je) {                    return Response.error(new ParseError(je));                }            }            /*設置當前請求的優先級*/            @Override            public Priority getPriority() {                return Priority.LOW;            }        };        stringRequest.setTag("get");        /*第三步，把請求對象放在請求隊列*/        queue.add(stringRequest);    }