Volley框架网络访问String,JsonObject,JsonArray
16lz
2021-01-26
首先需要下载volley.jar
<?xml version="1.0" encoding="utf-8"?> <?xml version="1.0" encoding="utf-8"?> package com.example.liuyazhou.myapplication;import android.app.Activity;import android.support.v7.app.AppCompatActivity;import android.os.Bundle;import android.util.Log;import android.view.View;import android.widget.Button;import android.widget.TextView;import android.widget.Toast;import com.android.volley.Request;import com.android.volley.RequestQueue;import com.android.volley.Response;import com.android.volley.VolleyError;import com.android.volley.VolleyLog;import com.android.volley.toolbox.JsonArrayRequest;import com.android.volley.toolbox.JsonObjectRequest;import com.android.volley.toolbox.StringRequest;import com.android.volley.toolbox.Volley;import org.json.JSONArray;import org.json.JSONException;import org.json.JSONObject;public class MainActivity extends Activity { private Button button1; private TextView textView1; private String urlJsonObj = "http://api.androidhive.info/volley/person_object.json"; private String urlJsonArry = "http://api.androidhive.info/volley/person_array.json"; private static String TAG = MainActivity.class.getSimpleName(); private String jsonResponse; @Override protected void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); setContentView(R.layout.activity_main); button1 = (Button) findViewById(R.id.button); textView1 = (TextView) findViewById(R.id.textView); button1.setOnClickListener(new View.OnClickListener() { @Override public void onClick(View v) { textView1.setText("你好，第一个Android程序！"); fun(); funJsonObjectRequest(); funJsonArrayRequest(); } }); }//onCreate public void fun() { RequestQueue mQueue = Volley.newRequestQueue(MainActivity.this); /cityname需要是转码后的，不能用中文 StringRequest stringRequest = new StringRequest("http://op.juhe.cn/onebox/weather/query?cityname=%E8%92%99%E5%9F%8E&dtype=&key=*****7942cbdcff19a08001", new Response.Listener() {///需要自己申请key，这里随便一个网址都行， @Override public void onResponse(String response) { Log.i("成功Listener-TAG", response); } }, new Response.ErrorListener() { @Override public void onErrorResponse(VolleyError error) { Log.e("失败ErrorListener-TAG", error.getMessage(), error); } }); mQueue.add(stringRequest); } public void funJsonObjectRequest() { RequestQueue mQueue = Volley.newRequestQueue(MainActivity.this); JsonObjectRequest jsonObjReq = new JsonObjectRequest(Request.Method.GET, urlJsonObj, null, new Response.Listener() { @Override public void onResponse(JSONObject response) { Log.i("JsonObject-成功-TAG", response.toString()); try { String name = response.getString("name"); String email = response.getString("email"); JSONObject phone = response.getJSONObject("phone"); String home = phone.getString("home"); String mobile = phone.getString("mobile"); jsonResponse = ""; jsonResponse += "Name: " + name + "\n"; jsonResponse += "Email: " + email + "\n"; jsonResponse += "Home: " + home + "\n"; jsonResponse += "Mobile: " + mobile + "\n"; Log.i("JsonObject-成功:", jsonResponse); } catch (JSONException e) { e.printStackTrace(); Toast.makeText(getApplicationContext(), "Error: " + e.getMessage(), Toast.LENGTH_LONG).show(); } } }, new Response.ErrorListener() { @Override public void onErrorResponse(VolleyError error) { VolleyLog.d(TAG, "Error: " + error.getMessage()); Toast.makeText(getApplicationContext(), error.getMessage(), Toast.LENGTH_SHORT).show(); } }); mQueue.add(jsonObjReq); }//funJson public void funJsonArrayRequest() { RequestQueue mQueue = Volley.newRequestQueue(MainActivity.this); JsonArrayRequest jsonArrayReq = new JsonArrayRequest(urlJsonArry, new Response.Listener() { @Override public void onResponse(JSONArray response) { Log.d(TAG, response.toString()); try { jsonResponse = ""; for (int i = 0; i < response.length(); i++) { JSONObject person = (JSONObject) response.get(i); String name = person.getString("name"); String email = person.getString("email"); JSONObject phone = person.getJSONObject("phone"); String home = phone.getString("home"); String mobile = phone.getString("mobile"); jsonResponse += "Name: " + name + "\n"; jsonResponse += "Email: " + email + "\n"; jsonResponse += "Home: " + home + "\n"; jsonResponse += "Mobile: " + mobile + "\n"; } Log.i("JsonArray-成功:", jsonResponse); } catch (JSONException e) { e.printStackTrace(); Toast.makeText(getApplicationContext(), "Error: " + e.getMessage(), Toast.LENGTH_LONG).show(); } } }, new Response.ErrorListener() { @Override public void onErrorResponse(VolleyError error) { VolleyLog.d(TAG, "Error: " + error.getMessage()); Toast.makeText(getApplicationContext(), error.getMessage(), Toast.LENGTH_SHORT).show(); } }); mQueue.add(jsonArrayReq); }}//MainActivity 更多相关文章
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