Volley Get网络请求

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请求*/
    public void dostringVolley(){
        /*第一步，创建请求队列*/
        queue = Volley.newRequestQueue(this);
        /*第二步，创建请求对象*/
        StringRequest stringRequest = new StringRequest(
                Request.Method.GET,           //当改成post方法时：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,"网络请求失败","text/html","UTF-8",null);
                    }
                }
        )
            /*getHeaders匿名内部类，获取头部，即获取apikey，对get方法和post方法都适用*/
        {
            @Override
            public Map<String, String> getHeaders() throws AuthFailureError {
                Map<String,String> map = new HashMap<String, String>();
                map.put("apikey","96c52acc3831b95cf4a5c6f0e23ea209");
                return map;
            }
            /*重写方法，完成转码*/
            @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));
                }
            }
            /*设置当前请求的优先级*/
            @Override
            public Priority getPriority() {
                return Priority.LOW;
            }
        };
        stringRequest.setTag("get");
        /*第三步，把请求对象放在请求队列*/
        queue.add(stringRequest);
    }