volley框架网络获取的使用

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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<String>() {            @Override            public void onResponse(String response) {            }        }, new Response.ErrorListener() {            @Override            public void onErrorResponse(VolleyError error) {            }        }){            @Override            protected Map<String, String> 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<String>() {            @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

<?xml version="1.0" encoding="utf-8"?><LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"    xmlns:tools="http://schemas.android.com/tools" android:id="@+id/activity_main"    android:layout_width="match_parent" android:layout_height="match_parent"    tools:context="com.example.myapplication.MainActivity"    android:orientation="vertical">    <Button        android:id="@+id/but1"        android:layout_width="wrap_content"        android:layout_height="wrap_content"        android:text="Get请求"        android:onClick="cc"/>    <Button        android:id="@+id/but2"        android:layout_width="wrap_content"        android:layout_height="wrap_content"        android:text="Post请求"        android:onClick="cc"/></LinearLayout>

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