Volley的StringRequest()簡用

volley jar包導入

AS在project視圖下，copy volley.jar到libs，然後右鍵設置爲libs jar。

配置一個Application

import android.app.Application;

import com.android.volley.RequestQueue;
import com.android.volley.toolbox.Volley;

/**
 * Created by neal on 16-8-16.
 */

public class MyApplication extends Application {
    public static RequestQueue queue;

    @Override
    public void onCreate() {
        super.onCreate();
        queue = Volley.newRequestQueue(getApplicationContext());
    }

    public static RequestQueue getHttpQueue() {
        return queue;
    }
}

配置自己的application和權限

 <uses-permission android:name="android.permission.INTERNET"/>
    <application
        android:name=".MyApplication"
        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>

StringRequest()簡用，包括get和post ，這裏我使用有道api接口，

http://fanyi.youdao.com/openapi?path=data-mode

#

import android.os.Bundle;
import android.support.v7.app.AppCompatActivity;
import android.widget.Toast;

import com.android.volley.AuthFailureError;
import com.android.volley.Request;
import com.android.volley.Response;
import com.android.volley.VolleyError;
import com.android.volley.toolbox.StringRequest;

import java.util.HashMap;
import java.util.Map;

public class MainActivity extends AppCompatActivity {

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);
        String urlPost = "http://fanyi.youdao.com/openapi.do";
        String urlGet = " http://fanyi.youdao.com/openapi.do?" +
                "keyfrom=GetStringRequet&key=667837517&type=data&doctype=json&version=1.1&q=good ";
        volley_Get(urlGet);
        volley_Post(urlPost);
    }

    //volleyGet
    private void volley_Get(String urlGet) {
        StringRequest request = new StringRequest(Request.Method.GET, urlGet, new Response.Listener<String>() {
            @Override
            public void onResponse(String s) {
                Toast.makeText(MainActivity.this, s, Toast.LENGTH_SHORT).show();
            }
        }, new Response.ErrorListener() {
            @Override
            public void onErrorResponse(VolleyError volleyError) {
                Toast.makeText(MainActivity.this, "訪問服務器失敗", Toast.LENGTH_SHORT).show();
            }
        });
        request.setTag("getMethod");
        MyApplication.getHttpQueue().add(request);
    }

    //vollyPost
    private void volley_Post(String urlPost) {
        StringRequest request = new StringRequest(Request.Method.POST, urlPost, new Response.Listener<String>() {
            @Override
            public void onResponse(String s) {
                Toast.makeText(MainActivity.this, s, Toast.LENGTH_SHORT).show();
            }
        }, new Response.ErrorListener() {
            @Override
            public void onErrorResponse(VolleyError volleyError) {
                Toast.makeText(MainActivity.this, "訪問服務器失敗", Toast.LENGTH_SHORT).show();
            }
        }) {
            @Override
            protected Map<String, String> getParams() throws AuthFailureError {
                HashMap<String, String> map = new HashMap<>();
                map.put("keyfrom", "GetStringRequet");
                map.put("key", "667837517");
                map.put("type", "data");
                map.put("doctype", "json");
                map.put("version", "1.1");
                map.put("q", "nice");
                return map;
            }
        };
        request.setTag("postMethod");
        MyApplication.getHttpQueue().add(request);
    }

    @Override
    protected void onStop() {
        MyApplication.getHttpQueue().cancelAll("postMethod");
        MyApplication.getHttpQueue().cancelAll("getMethod");
        super.onStop();
    }
}