爱站程序员基地上一篇给大家讲解了Volley的使用,因为重复代码比较多,这篇给大家简单的吧Volley封装一下.方便以后使用
- 创建VolleyRequestUtil工具类
- StringRequest封装
- JsonObjectRequest GET封装
- JsonObjectRequest POST封装
- ImageRequest封装
- ImageLoader封装
- 完整代码:
创建VolleyRequestUtil工具类
实现单利模式,保证实例唯一化:
public class VolleyRequestUtil {private VolleyRequestUtil(){}private static volatile VolleyRequestUtil mVolleyRequestUtil;private static Context mContext;private RequestQueue requestQueue;public static VolleyRequestUtil getInstance(Context context){if (mVolleyRequestUtil == null) {synchronized (VolleyRequestUtil.class){if (mVolleyRequestUtil == null) {mContext = context;mVolleyRequestUtil = new VolleyRequestUtil();}}}return mVolleyRequestUtil;}........}
StringRequest封装
/**** @param url 用于请求文本接口* @param volleyStringInterface 用于实现请求接口*/public void StringRequest(String url, VolleyStringInterface volleyStringInterface){getVolley();StringRequest stringRequest = new StringRequest(url, volleyStringInterface.onStringResponse(), volleyStringInterface.onErr());requestQueue.add(stringRequest);}
VolleyStringInterface接口
/*** 文本实现接口*/public interface VolleyStringInterface{public Response.Listener<String> onStringResponse();public Response.ErrorListener onErr();}
getVolley()方法
//获取RequestQueue对象private void getVolley(){if (requestQueue == null) {requestQueue = Volley.newRequestQueue(mContext);}}
使用:
//参数一:文本接口//参数二:VolleyStringInterface接口实例VolleyRequestUtil.getInstance(this).StringRequest(STRINGREQUEST_URL, new VolleyRequestUtil.VolleyStringInterface() {@Overridepublic Response.Listener<String> onStringResponse() {//这里返回值是什么就new什么return new Response.Listener<String>() {@Overridepublic void onResponse(String response) {Log.i(\"VolleyStringRequest\",response);}};}@Overridepublic Response.ErrorListener onErr() {// //这里返回值是什么就new什么return new Response.ErrorListener() {@Overridepublic void onErrorResponse(VolleyError error) {Log.i(\"VolleyStringRequest\",error.getMessage());}};}});
注释都有所讲解,请详细阅读注释:
来看看Log吧:
JsonObjectRequest GET封装
/**** @param url 请求GET接口* @param volleyListenerInterface*/public void GETJsonObjectRequest(String url, VolleyListenerInterface volleyListenerInterface){getVolley();JsonObjectRequest jsonObjectRequest = new JsonObjectRequest(url,null,volleyListenerInterface.onResponse(),volleyListenerInterface.onErr());requestQueue.add(jsonObjectRequest);}
VolleyListenerInterface接口:
/*** JsonObject实现接口*/public interface VolleyListenerInterface {/**** @return 返回JSONObject接口对象*/public abstract Response.Listener<JSONObject> onResponse();/**** @return 报错提示*/public abstract Response.ErrorListener onErr();}
使用:
VolleyRequestUtil.getInstance(this).GETJsonObjectRequest(\"http://www.weather.com.cn/data/city3jdata/china.html\", new VolleyRequestUtil.VolleyListenerInterface() {@Overridepublic Response.Listener<JSONObject> onResponse() {//这里需要什么就new什么return new Response.Listener<JSONObject>() {@Overridepublic void onResponse(JSONObject response) {Log.i(\"onResponse\", response.toString());}};}@Overridepublic Response.ErrorListener onErr() {//这里需要什么就new什么return new Response.ErrorListener() {@Overridepublic void onErrorResponse(VolleyError error) {Log.i(\"onErrorResponse\", error.getMessage());}};}});
来康康效果吧:
JsonObjectRequest POST封装
/**** @param url 请求POST接口* @param hashMap 请求POST参数* @param volleyListenerInterface*/public void POSTJsonObjectRequest(String url, final HashMap hashMap, VolleyListenerInterface volleyListenerInterface){getVolley();JSONObject jsonObject = new JSONObject(hashMap);JsonObjectRequest jsonObjectRequest = new JsonObjectRequest(Request.Method.POST,url,jsonObject,volleyListenerInterface.onResponse(),volleyListenerInterface.onErr()){@Overrideprotected Map<String, String> getParams() throws AuthFailureError {hashMap.put(\"Accept\", \"application/json\");hashMap.put(\"Content-Type\", \"application/json; charset=UTF-8\");return hashMap;}};requestQueue.add(jsonObjectRequest);}
VolleyListenerInterface接口:
/*** JsonObject实现接口*/public interface VolleyListenerInterface {/**** @return 返回JSONObject接口对象*/public abstract Response.Listener<JSONObject> onResponse();/**** @return 报错提示*/public abstract Response.ErrorListener onErr();}
使用:
HashMap<String, String> hashMap = new HashMap<>();hashMap.put(\"app_key\",\"74D2E724FE2B69EF7EA3F38E9400CF71\");VolleyRequestUtil.getInstance(this).POSTJsonObjectRequest(\"POST接口\", hashMap, new VolleyRequestUtil.VolleyListenerInterface() {@Overridepublic Response.Listener<JSONObject> onResponse() {return new Response.Listener<JSONObject>() {@Overridepublic void onResponse(JSONObject response) {}};}@Overridepublic Response.ErrorListener onErr() {return new Response.ErrorListener() {@Overridepublic void onErrorResponse(VolleyError error) {}};}});
ImageRequest封装
/**** @param url 请求图片接口* @param maxWidth 解码此位图的最大宽度，或0表示无 参数分别用于指定允许图片最大的宽度和高度，如果指定的网络图片的宽度或高度大于这里的最大值，* 则会对图片进行压缩，指定成0的话就表示不管图片有多大，都不会进行压缩* @param maxHeigth 解码此位图的最大高度，或为零表示无* @param rgb 设置颜色属性 Bitmap.Config.ARGB_8888 属性最好* @param volleyImageInterface 图片正确错误接口*/public void ImageRequest(String url, int maxWidth, int maxHeigth, Bitmap.Config rgb, VolleyImageInterface volleyImageInterface){getVolley();ImageRequest imageRequest = new ImageRequest(url,volleyImageInterface.onBitmap(),maxWidth,maxHeigth,rgb,volleyImageInterface.onErr());requestQueue.add(imageRequest);}
VolleyImageInterface 实现接口:
/*** Bitmap实现接口*/public interface VolleyImageInterface {/**** @return 返回Bitmap图片*/public abstract Response.Listener<Bitmap> onBitmap();/**** @return 报错*/public abstract Response.ErrorListener onErr();}
使用:
VolleyRequestUtil.getInstance(this).ImageRequest(\"http://api.map.baidu.com/images/weather/day/zhenyu.png\", 0, 0, Bitmap.Config.ARGB_8888, new VolleyRequestUtil.VolleyImageInterface() {@Overridepublic Response.Listener<Bitmap> onBitmap() {return new Response.Listener<Bitmap>() {@Overridepublic void onResponse(Bitmap response) {mImage.setImageBitmap(response);}};}@Overridepublic Response.ErrorListener onErr() {return new Response.ErrorListener() {@Overridepublic void onErrorResponse(VolleyError error) {Log.i(\"onErrorResponse\", error.getMessage());}};}});
ImageLoader封装
/**** @param view 设置的ImageView* @param uri 加载图片的路径* @param defaultImageResId 未加载出图片时的图片* @param errorImageResId 加载报错时的图片* @param maxWidth 图像的最大宽度* @param maxHeight 图像的最大高度* @param volleyImageLoaderLolderInterface 缓存接口*/public void ImageLoader(ImageView view ,String uri, int defaultImageResId, final int errorImageResId ,int maxWidth, int maxHeight, VolleyImageLoaderLolderInterface volleyImageLoaderLolderInterface){getVolley();ImageLoader imageLoader = new ImageLoader(requestQueue, volleyImageLoaderLolderInterface.onCache());ImageLoader.ImageListener imageListener = ImageLoader.getImageListener(view, defaultImageResId, errorImageResId);imageLoader.get(uri, imageListener,maxWidth,maxHeight);}/**** @param view 设置的ImageView* @param uri 加载图片的路径* @param defaultImageResId 未加载出图片时的图片* @param errorImageResId 加载报错时的图片* @param volleyImageLoaderLolderInterface 缓存接口*/public void ImageLoader(ImageView view ,String uri, int defaultImageResId, final int errorImageResId ,VolleyImageLoaderLolderInterface volleyImageLoaderLolderInterface){getVolley();ImageLoader imageLoader = new ImageLoader(requestQueue, volleyImageLoaderLolderInterface.onCache());ImageLoader.ImageListener imageListener = ImageLoader.getImageListener(view, defaultImageResId, errorImageResId);imageLoader.get(uri, imageListener);}
VolleyImageLoaderLolderInterface接口:
/*** ImageLolder实现可缓存图片接口*/public interface VolleyImageLoaderLolderInterface {/**** @return 缓存* ImageLoader.ImageCache 返回2个参数 getBitmap(String url) 参数一:返回当前请求的接口* putBitmap(String url, Bitmap bitmap) 参数一:返回当前请求的接口,参数二:返回当前Bitmap对象* 主要用来进行缓存*/public abstract ImageLoader.ImageCache onCache();}
使用:
VolleyRequestUtil.getInstance(this).ImageLoader(image2,\"http://api.map.baidu.com/images/weather/night/duoyun.png\",R.drawable.ic_launcher_foreground,R.drawable.ic_launcher_background,new VolleyRequestUtil.VolleyImageLoaderLolderInterface() {@Overridepublic ImageLoader.ImageCache onCache() {return new ImageLoader.ImageCache() {@Overridepublic Bitmap getBitmap(String url) {return null;}@Overridepublic void putBitmap(String url, Bitmap bitmap) {}};}});
完整代码:
package demo.ht.com.volley.http;import android.content.Context;import android.graphics.Bitmap;import android.widget.ImageView;import com.android.volley.AuthFailureError;import com.android.volley.DefaultRetryPolicy;import com.android.volley.Request;import com.android.volley.RequestQueue;import com.android.volley.Response;import com.android.volley.VolleyError;import com.android.volley.toolbox.ImageLoader;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;/*** Created by szj 20200714* implementation \'com.android.volley:volley:1.1.1\'*/public class VolleyRequestUtil {private VolleyRequestUtil(){}private static volatile VolleyRequestUtil mVolleyRequestUtil;private static Context mContext;private RequestQueue requestQueue;public static VolleyRequestUtil getInstance(Context context){if (mVolleyRequestUtil == null) {synchronized (VolleyRequestUtil.class){if (mVolleyRequestUtil == null) {mContext = context;mVolleyRequestUtil = new VolleyRequestUtil();}}}return mVolleyRequestUtil;}/**** @param url 请求GET接口* @param volleyListenerInterface*/public void GETJsonObjectRequest(String url, VolleyListenerInterface volleyListenerInterface){getVolley();JsonObjectRequest jsonObjectRequest = new JsonObjectRequest(url,null,volleyListenerInterface.onResponse(),volleyListenerInterface.onErr());requestQueue.add(jsonObjectRequest);}/**** @param url 用于请求文本接口* @param volleyStringInterface 用于实现请求接口*/public void StringRequest(String url, VolleyStringInterface volleyStringInterface){getVolley();StringRequest stringRequest = new StringRequest(url, volleyStringInterface.onStringResponse(), volleyStringInterface.onErr());requestQueue.add(stringRequest);}/*** 获取RequestQueue对象*/private void getVolley(){if (requestQueue == null) {requestQueue = Volley.newRequestQueue(mContext);}}/**** @param url 请求POST接口* @param hashMap 请求POST参数* @param volleyListenerInterface*/public void POSTJsonObjectRequest(String url, final HashMap hashMap, VolleyListenerInterface volleyListenerInterface){getVolley();JSONObject jsonObject = new JSONObject(hashMap);JsonObjectRequest jsonObjectRequest = new JsonObjectRequest(Request.Method.POST,url,jsonObject,volleyListenerInterface.onResponse(),volleyListenerInterface.onErr()){@Overrideprotected Map<String, String> getParams() throws AuthFailureError {hashMap.put(\"Accept\", \"application/json\");hashMap.put(\"Content-Type\", \"application/json; charset=UTF-8\");return hashMap;}};requestQueue.add(jsonObjectRequest);}/**** @param url 请求图片接口* @param maxWidth 解码此位图的最大宽度，或0表示无 参数分别用于指定允许图片最大的宽度和高度，如果指定的网络图片的宽度或高度大于这里的最大值，* 则会对图片进行压缩，指定成0的话就表示不管图片有多大，都不会进行压缩* @param maxHeigth 解码此位图的最大高度，或为零表示无* @param rgb 设置颜色属性 Bitmap.Config.ARGB_8888 属性最好* @param volleyImageInterface 图片正确错误接口*/public void ImageRequest(String url, int maxWidth, int maxHeigth, Bitmap.Config rgb, VolleyImageInterface volleyImageInterface){getVolley();ImageRequest imageRequest = new ImageRequest(url,volleyImageInterface.onBitmap(),maxWidth,maxHeigth,rgb,volleyImageInterface.onErr());requestQueue.add(imageRequest);}/**** @param view 设置的ImageView* @param uri 加载图片的路径* @param defaultImageResId 未加载出图片时的图片* @param errorImageResId 加载报错时的图片* @param maxWidth 图像的最大宽度* @param maxHeight 图像的最大高度* @param volleyImageLoaderLolderInterface 缓存接口*/public void ImageLoader(ImageView view ,String uri, int defaultImageResId, final int errorImageResId ,int maxWidth, int maxHeight, VolleyImageLoaderLolderInterface volleyImageLoaderLolderInterface){getVolley();ImageLoader imageLoader = new ImageLoader(requestQueue, volleyImageLoaderLolderInterface.onCache());ImageLoader.ImageListener imageListener = ImageLoader.getImageListener(view, defaultImageResId, errorImageResId);imageLoader.get(uri, imageListener,maxWidth,maxHeight);}/**** @param view 设置的ImageView* @param uri 加载图片的路径* @param defaultImageResId 未加载出图片时的图片* @param errorImageResId 加载报错时的图片* @param volleyImageLoaderLolderInterface 缓存接口*/public void ImageLoader(ImageView view ,String uri, int defaultImageResId, final int errorImageResId ,VolleyImageLoaderLolderInterface volleyImageLoaderLolderInterface){getVolley();ImageLoader imageLoader = new ImageLoader(requestQueue, volleyImageLoaderLolderInterface.onCache());ImageLoader.ImageListener imageListener = ImageLoader.getImageListener(view, defaultImageResId, errorImageResId);imageLoader.get(uri, imageListener);}/*** Bitmap实现接口*/public interface VolleyImageInterface {/**** @return 返回Bitmap图片*/public abstract Response.Listener<Bitmap> onBitmap();/**** @return 报错*/public abstract Response.ErrorListener onErr();}/*** ImageLolder实现可缓存图片接口*/public interface VolleyImageLoaderLolderInterface {/**** @return 缓存* ImageLoader.ImageCache 返回2个参数 getBitmap(String url) 参数一:返回当前请求的接口* putBitmap(String url, Bitmap bitmap) 参数一:返回当前请求的接口,参数二:返回当前Bitmap对象* 主要用来进行缓存*/public abstract ImageLoader.ImageCache onCache();}/*** JsonObject实现接口*/public interface VolleyListenerInterface {/**** @return 返回JSONObject接口对象*/public abstract Response.Listener<JSONObject> onResponse();/**** @return 报错提示*/public abstract Response.ErrorListener onErr();}/*** 文本实现接口*/public interface VolleyStringInterface{public Response.Listener<String> onStringResponse();public Response.ErrorListener onErr();}}
封装的可能没有个别大佬完善,但我已经尽力了,要有更高见解,请在评论区留言哦~~
Git链接: langyangyang.
