volley框架网络获取的使用

1.导包

2.自己写个类继承Application

public class myapp extends Application {
    private static RequestQueue requestQueue;
    @Override
    public void onCreate() {
        super.onCreate();
        requestQueue= Volley.newRequestQueue(getApplicationContext());
    }
    public static RequestQueue getRequestQueue(){
        return requestQueue;
    }
}

3.在AndroidManifest中使用

4.主函数

public class MainActivity extends AppCompatActivity {

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);
    }

    public void cc(View view) {
        switch (view.getId()){
            case R.id.but1:
               get();
                break;
            case R.id.but2:
                post();
                break;
        }
    }

    private void post() {
        String str= "http://www.qubaobei.com/ios/cf/dish_list.php?stage_id=1&limit=20&page=1";
        StringRequest sr=new StringRequest(Request.Method.POST, str, new Response.Listener() {
            @Override
            public void onResponse(String response) {

            }
        }, new Response.ErrorListener() {
            @Override
            public void onErrorResponse(VolleyError error) {

            }
        }){
            @Override
            protected Map getParams() throws AuthFailureError {
                HashMap map=new HashMap();
                map.put("pageNo", "1");
                map.put("pageSize", "20");
                map.put("serialIds", "2143,3404");
                map.put("v", "4.0.0");
                return map;
            }
        };
        sr.setTag("call");
        myapp.getRequestQueue().add(sr);

    }

    public void get() {
        String str= "http://www.qubaobei.com/ios/cf/dish_list.php?stage_id=1&limit=20&page=1";
        StringRequest sr=new StringRequest(Request.Method.GET,str, new Response.Listener() {
            @Override
            public void onResponse(String response) {
                Log.d("aaaa", "onResponse: "+response);
            }
        }, new Response.ErrorListener() {
            @Override
            public void onErrorResponse(VolleyError error) {
                Log.d("aaaa", "onErrorResponse: "+error.toString());
            }
        });
        sr.setTag("ace");
        myapp.getRequestQueue().add(sr);
    }

    @Override
    protected void onDestroy() {
        super.onDestroy();
        myapp.getRequestQueue().cancelAll("ace");
        myapp.getRequestQueue().cancelAll("call");
    }
}

5.主布局