Android中Volley架包的使用

Volley架包中的StringRequest，JsonObjectRequest，ImageRequest可以分別進行網址的get，post解析，Json解析，圖片解析。

首先還是把Volley架包複製到Android Studio中的libs目錄下並刷新。

activity_main.xml

<?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:layout_width="match_parent"
    android:layout_height="match_parent"
    android:orientation="vertical"
    android:padding="10dp">

    <Button
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:onClick="btnStringRequestGet"
        android:text="StringGet聯網請求" />

    <Button
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:onClick="btnStringRequestPost"
        android:text="StringPost聯網請求" />

    <Button
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:onClick="json"
        android:text="JsonRequest請求" />

    <Button
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:onClick="image"
        android:text="ImageRequest請求" />

    <ImageView
        android:id="@+id/imageView"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content" />
</LinearLayout>

MainActivity：

package com.example.administrator.volleydemo;

import android.graphics.Bitmap;
import android.os.Bundle;
import android.support.v7.app.AppCompatActivity;
import android.util.Log;
import android.view.View;
import android.widget.ImageView;

import com.android.volley.AuthFailureError;
import com.android.volley.Request;
import com.android.volley.RequestQueue;
import com.android.volley.Response.ErrorListener;
import com.android.volley.Response.Listener;
import com.android.volley.VolleyError;
import com.android.volley.toolbox.ImageRequest;
import com.android.volley.toolbox.JsonObjectRequest;
import com.android.volley.toolbox.StringRequest;
import com.android.volley.toolbox.Volley;

import org.json.JSONObject;

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

/**
 * 1、創建RequestQueue，用於管理聯網請求
 * 2、創建一個聯網請求：StringRequest，JsonObjectRequest，
 * 3、把創建的Request添加到RequestQueue中，Volley會自動聯網請求，把數據返回到藉口ImageRequest回調中
 */
public class MainActivity extends AppCompatActivity {

    private String urlGet = "http://218.244.149.129:9010/api/companylist.php?industryid=99";
    private String urlPost = "http://218.244.149.129:9010/api/companylist.php";
    private String jsonUrl = "http://mobile.ximalaya.com/m/category_tag_menu";
    private String imageUrl = "https://www.baidu.com/img/bd_logo1.png";
    private RequestQueue queue;
    private StringRequest requestGet;
    private StringRequest requestPost;
    private ImageView iv;

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);
        iv = (ImageView) findViewById(R.id.imageView);
        //創建RequestQueue
        queue = Volley.newRequestQueue(this);
    }

    /**
     * StringRequest Get請求
     *
     * @param view
     */
    public void btnStringRequestGet(View view) {
        //Get請求
        requestGet = new StringRequest(Request.Method.GET, urlGet, new Listener<String>() {
            @Override
            public void onResponse(String s) {
                Log.i("main", "get-->" + s);
            }
        }, new ErrorListener() {
            @Override
            public void onErrorResponse(VolleyError volleyError) {

            }
        }
        );
        queue.add(requestGet);
    }

    /**
     * StringRequest Post請求
     *
     * @param view
     */
    public void btnStringRequestPost(View view) {
        requestPost = new StringRequest(Request.Method.POST, urlPost, new Listener<String>() {
            @Override
            public void onResponse(String s) {

                Log.i("main", "post-->" + s);
            }
        }, new ErrorListener() {
            @Override
            public void onErrorResponse(VolleyError volleyError) {

            }
        }) {
            @Override
            protected Map<String, String> getParams() throws AuthFailureError {
                Map<String, String> map = new HashMap<>();
                map.put("industryid", "99");
                return map;
            }
        };
        queue.add(requestPost);
    }

    /**
     * 進行JsonRequest請求
     *
     * @param view
     */
    public void json(View view) {
        JsonObjectRequest jsonObjectRequest = new JsonObjectRequest(jsonUrl,
                null,//購物軟件一般需要傳遞商品的Json對象
                new Listener<JSONObject>() {
                    @Override
                    public void onResponse(JSONObject jsonObject) {
                        Log.i("main", "json--->" + jsonObject.toString());
                    }
                }, new ErrorListener() {
            @Override
            public void onErrorResponse(VolleyError volleyError) {

            }
        });
        queue.add(jsonObjectRequest);
    }

    /**
     * 進行ImageRequest請求
     *
     * @param view
     */
    public void image(View view) {
        ImageRequest imageRequest = new ImageRequest(imageUrl, new Listener<Bitmap>() {
            @Override
            public void onResponse(Bitmap bitmap) {
                if (bitmap != null) {
                    iv.setImageBitmap(bitmap);
                }
            }
        }, 256, 128, Bitmap.Config.RGB_565, new ErrorListener() {
            @Override
            public void onErrorResponse(VolleyError volleyError) {

            }
        });
        queue.add(imageRequest);
    }
}

運行結果：

解析的數據的Log輸出：