Volley框架网络访问String,JsonObject,JsonArray

来源：互联网发布：java中字符串拼接编辑：程序博客网时间：2024/05/14 05:51

首先需要下载volley.jar

<?xml version="1.0" encoding="utf-8"?><manifest xmlns:android="http://schemas.android.com/apk/res/android"    package="com.example.liuyazhou.myapplication">    <uses-permission android:name="android.permission.INTERNET" />    <application        android:allowBackup="true"        android:icon="@mipmap/ic_launcher"        android:label="@string/app_name"        android:supportsRtl="true"        android:theme="@style/AppTheme">        <activity android:name=".MainActivity">            <intent-filter>                <action android:name="android.intent.action.MAIN" />                <category android:name="android.intent.category.LAUNCHER" />            </intent-filter>        </activity>    </application></manifest>

<?xml version="1.0" encoding="utf-8"?><RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"    xmlns:tools="http://schemas.android.com/tools"    android:layout_width="match_parent"    android:layout_height="match_parent"    android:paddingBottom="@dimen/activity_vertical_margin"    android:paddingLeft="@dimen/activity_horizontal_margin"    android:paddingRight="@dimen/activity_horizontal_margin"    android:paddingTop="@dimen/activity_vertical_margin"    tools:context="com.example.liuyazhou.myapplication.MainActivity">    <TextView        android:layout_width="wrap_content"        android:layout_height="wrap_content"        android:text="Hello World!"        android:id="@+id/textView" />    <Button        android:layout_width="wrap_content"        android:layout_height="wrap_content"        android:text="点击"        android:id="@+id/button"        android:layout_below="@+id/textView"        android:layout_centerHorizontal="true"        android:layout_marginTop="47dp" /></RelativeLayout>

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<String>() {///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<JSONObject>() {            @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<JSONArray>() {                    @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

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