Volley的使用

Volley 的GET POST * 根据不同的请求选择不同的请求对象 返回数据不确定 可用StringRequest * StringRequest包括JsonObjectRequest和JsonArrayRequest * StringRequest * JsonObjetRequest * JsonArrayRequest * 使用时 首先建立一个请求队列 可以针对某个请求进行取消 * Volley生命周期与Activity生命周期关联 可以在Activity关闭时 关闭请求 * * 设置Tag标签 onStop()执行取消请求

创建请求队列:

public class MyApplication extends Application { //创建请求队列 public static RequestQueue requestQueue; @Override public void onCreate() { super.onCreate(); //实例化请求队列 requestQueue= Volley.newRequestQueue(getApplicationContext()); } public static RequestQueue getRequestQueue(){ return requestQueue; } }

使用Volley进行GET POST请求

public class MainActivity extends AppCompatActivity { @Override protected void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); setContentView(R.layout.activity_main); //volley_GET(); //Array_request(); //JsonObject_request(); //VolleyPost(); jsonObj_POST(); } /* * 将Volley与activiy的生命周期相关联 * */ @Override protected void onStop() { super.onStop(); MyApplication.getRequestQueue().cancelAll("abcGet"); } private void volley_GET() { String url="http://hq.sinajs.cn/list=sh601006"; StringRequest stringRequest=new StringRequest(Request.Method.GET, url, new Response.Listener<String>() { @Override public void onResponse(String s) { Log.i("onResponse==",s); } }, new Response.ErrorListener() { @Override public void onErrorResponse(VolleyError volleyError) { Log.i("onErrorResponse",volleyError+""); } }); stringRequest.setTag("abcGet"); MyApplication.getRequestQueue().add(stringRequest); } private void JsonObject_request(){ String url="http://192.168.2.45/android.php?type=json&name=zhangsan"; JsonObjectRequest objectRequest=new JsonObjectRequest(Request.Method.GET,url,null,new Response.Listener<JSONObject>() { @Override public void onResponse(JSONObject jsonObject) { try { Log.i("JSONObject===",jsonObject.getString("id")+" "+" "+jsonObject.getString("name")+" "+jsonObject.getString("address")); } catch (JSONException e) { e.printStackTrace(); } } }, new Response.ErrorListener() { @Override public void onErrorResponse(VolleyError volleyError) { Log.i("onErrorResponse=", ""+volleyError); } }); objectRequest.setTag("jsonobj"); MyApplication.getRequestQueue().add(objectRequest); } private void Array_request(){ String url="http://192.168.2.45/android.php?type=array"; JsonArrayRequest arrayRequest=new JsonArrayRequest(url, new Response.Listener<JSONArray>() { @Override public void onResponse(JSONArray jsonArray) { Log.i("---JSONArray---", "onResponse: "+jsonArray); } }, new Response.ErrorListener() { @Override public void onErrorResponse(VolleyError volleyError) { Log.i("---JSONArray---", "onResponse: "+volleyError); } }); arrayRequest.setTag("array_request"); MyApplication.getRequestQueue().add(arrayRequest); } private void VolleyPost(){ String url="http://192.168.2.45/android.php"; StringRequest stringRequest=new StringRequest(Request.Method.POST, url, new Response.Listener<String>() { @Override public void onResponse(String s) { Log.i("VolleyPost", s); } }, new Response.ErrorListener() { @Override public void onErrorResponse(VolleyError volleyError) { Log.i("VolleyPost", volleyError+""); } }){ @Override protected Map<String, String> getParams() throws AuthFailureError { Map<String,String> map=new HashMap<>(); map.put("type","json"); map.put("tel","13864455353"); return map; } }; stringRequest.setTag("post_request"); MyApplication.getRequestQueue().add(stringRequest); } private void jsonObj_POST(){ String url="http://192.168.2.45/android.php"; Map<String,String> map=new HashMap<>(); map.put("type","jsonobj"); map.put("address","shandongzibo"); JSONObject jsonObject=new JSONObject(map); JsonObjectRequest jsonObjectRequest=new JsonObjectRequest(Request.Method.POST,url,jsonObject,new Response.Listener<JSONObject>() { @Override public void onResponse(JSONObject jsonObject) { try { Log.i("JSONObject POST===",jsonObject.getString("id")+" "+" "+jsonObject.getString("name")+" "+jsonObject.getString("address")); } catch (JSONException e) { e.printStackTrace(); } } }, new Response.ErrorListener() { @Override public void onErrorResponse(VolleyError volleyError) { Log.i("onErrorResponse", volleyError+""); } }); jsonObjectRequest.setTag("json_post"); MyApplication.getRequestQueue().add(jsonObjectRequest); } }