無限輪播(Handler+ImageLoader)+OkHttp二次封裝
阿新 • • 發佈：2018-12-13
今天來搞一下通過網路請求實現無限輪播,我寫了一個小demo與大家分享一下,我是在fragment中操作的,那麼Activity在這裡就不展示了,Activity也就是實現fragment與fragment之間的聯動,所以今天就只給大家分享一下輪播圖涉及到的一些相關程式碼,節省大家的閱讀時間,提高大家的工作效率;
首先搭建環境:
依賴:
/*android5.0的新特性使用*/
implementation 'com.android.support:support-v13:28.0.0'
implementation 'com.android.support:cardview-v7:28.0.0' 網路許可權:
<uses-permission android:name="android.permission.INTERNET"/>
因為本次我採用的是ImageLoader載入圖片,所以需要在AndroidManifest(清單檔案)裡註冊一下我們自定義的MyApplication類:
<application
android:name=".MyApp.MyApplication"
</application>
1.Fragment:
在這裡我呼叫了封裝好的OkHttp進行網路請求,從而獲取圖片,通過handler實現無限輪播
package com.example.weekone.fragment;
import android.os.Bundle;
import android.os.Handler;
import android.os.Message;
import android.support.annotation.NonNull;
import android.support.annotation.Nullable;
import android.support.v4.app.Fragment;
import android.support.v4.view.ViewPager;
import android.support.v7.widget.RecyclerView;
import android.view.LayoutInflater;
import android.view.View;
import android.view.ViewGroup;
import com.example.weekone.R;
import com.example.weekone.adapter.SlideshowAdadpter;
import com.example.weekone.bean.DataItem;
import com.example.weekone.util.OkHttpUtils;
import com.google.gson.Gson;
import java.util.List;
/**
* date:2018/12/2
* author:李壯(大壯)
* function:
*/
public class HomeFragment extends Fragment {
private ViewPager home_vp;
private RecyclerView home_center_recyclerview;
private RecyclerView home_bootom_recyclerview;
private String path = "http://result.eolinker.com/umIPmfS6c83237d9c70c7c9510c9b0f97171a308d13b611?uri=homepage";
private SlideshowAdadpter mSlideshowAdadpter;
private int SUM = 0;
Handler mHandler = new Handler(){
@Override
public void handleMessage(Message msg) {
home_vp.setCurrentItem(home_vp.getCurrentItem() + 1);
mHandler.sendEmptyMessageDelayed(SUM,1000);
}
};
@Nullable
@Override
public View onCreateView(@NonNull LayoutInflater inflater, @Nullable ViewGroup container, @Nullable Bundle savedInstanceState) {
View view = View.inflate(getContext(), R.layout.home_fragment_item, null);
//初始化控制元件
initView(view);
//載入輪播圖
initSlideshow();
return view;
}
//設定輪播效果
private void initSlideshow() {
OkHttpUtils.getInstance().doGet(path, new OkHttpUtils.onOkCallback() {
@Override
public void success(String json) {
DataItem dataItem = new Gson().fromJson(json, DataItem.class);
List<DataItem.DataBean.DefaultGoodsListBean> defaultGoodsList = dataItem.getData().getDefaultGoodsList();
//建立介面卡
mSlideshowAdadpter = new SlideshowAdadpter(getActivity());
mSlideshowAdadpter.setData(defaultGoodsList);
home_vp.setAdapter(mSlideshowAdadpter);
mHandler.sendEmptyMessageDelayed(SUM,1000);
}
@Override
public void defeated(Exception e) {
}
});
}
private void initView(View view) {
home_vp = (ViewPager) view.findViewById(R.id.home_vp);
home_center_recyclerview = (RecyclerView) view.findViewById(R.id.home_center_recyclerview);
home_bootom_recyclerview = (RecyclerView) view.findViewById(R.id.home_bootom_recyclerview);
}
}
2.建立介面卡:
在這裡對頁面進行操作,完成圖片的展示,我採用了一個比較簡單的框架ImageLoader來進行圖片的載入展示工作
package com.example.weekone.adapter;
import android.content.Context;
import android.net.Uri;
import android.support.annotation.NonNull;
import android.support.v4.app.FragmentActivity;
import android.support.v4.view.PagerAdapter;
import android.view.View;
import android.view.ViewGroup;
import android.widget.ImageView;
import com.example.weekone.MyApp.Config;
import com.example.weekone.bean.DataItem;
import com.facebook.drawee.generic.GenericDraweeHierarchyBuilder;
import com.facebook.drawee.view.SimpleDraweeView;
import com.nostra13.universalimageloader.core.ImageLoader;
import java.util.ArrayList;
import java.util.List;
/**
* date:2018/12/2
* author:李壯(大壯)
* function:輪播圖介面卡
*/
public class SlideshowAdadpter extends PagerAdapter {
private Context mContext;
private List<DataItem.DataBean.DefaultGoodsListBean> mDefaultGoodsListBeans;
private String path = "http://result.eolinker.com/umIPmfS6c83237d9c70c7c9510c9b0f97171a308d13b611?uri=homepage";
public SlideshowAdadpter(Context context) {
this.mContext = context;
mDefaultGoodsListBeans = new ArrayList<>();
}
public void setData(List<DataItem.DataBean.DefaultGoodsListBean> defaultGoodsList) {
mDefaultGoodsListBeans.clear();
if (defaultGoodsList != null){
mDefaultGoodsListBeans.addAll(defaultGoodsList);
}
notifyDataSetChanged();
}
@Override
public int getCount() {
return mDefaultGoodsListBeans.size() > 0 ? Integer.MAX_VALUE : 0;
}
@Override
public boolean isViewFromObject(@NonNull View view, @NonNull Object o) {
return view == o;
}
@NonNull
@Override
public Object instantiateItem(@NonNull ViewGroup container, int position) {
//SimpleDraweeView simpleDraweeView = new SimpleDraweeView(mContext);
ImageView imageView = new ImageView(mContext);
//Uri parse = Uri.parse(mDefaultGoodsListBeans.get(position).getGoods_img());
//GenericDraweeHierarchyBuilder genericDraweeHierarchyBuilder = new GenericDraweeHierarchyBuilder(mContext.getResources());
ImageLoader.getInstance().displayImage(mDefaultGoodsListBeans.get(position % mDefaultGoodsListBeans.size()).getGoods_img(),imageView,Config.disPlay());
container.addView(imageView);
return imageView;
}
@Override
public void destroyItem(@NonNull ViewGroup container, int position, @NonNull Object object) {
container.removeView((View) object);
}
}
3.建立自定義類MyApplication:
前面提到我使用的是ImageLoader所以我們需要自定義一個MyApplication類
package com.example.weekone.MyApp;
import android.app.Application;
import com.facebook.drawee.backends.pipeline.Fresco;
import com.nostra13.universalimageloader.core.ImageLoader;
import com.nostra13.universalimageloader.core.ImageLoaderConfiguration;
/**
* date:2018/12/2
* author:李壯(大壯)
* function:
*/
public class MyApplication extends Application {
@Override
public void onCreate() {
super.onCreate();
Fresco.initialize(this);
ImageLoaderConfiguration imageLoaderConfiguration = new ImageLoaderConfiguration.Builder(this)
.diskCacheSize(50*1024*1024)
.memoryCacheSize(10)
.defaultDisplayImageOptions(Config.disPlay())
.build();
ImageLoader.getInstance().init(imageLoaderConfiguration);
}
}
接下來定義一個樣式類:
我們可以根據需求,設定相應的展示樣式,這次我就搞個簡單的,使用的是介面提供的預設樣式的圖片效果
package com.example.weekone.MyApp;
import com.nostra13.universalimageloader.core.DisplayImageOptions;
/**
* date:2018/12/2
* author:李壯(大壯)
* function:
*/
public class Config {
public static DisplayImageOptions disPlay(){
DisplayImageOptions displayImageOptions = new DisplayImageOptions.Builder()
.cacheInMemory(true)
.cacheInMemory(true)
.build();
return displayImageOptions;
}
}
4.OkHttp二次封裝
package com.example.weekone.util;
import android.os.Handler;
import android.os.Looper;
import java.io.IOException;
import java.util.Map;
import java.util.concurrent.TimeUnit;
import okhttp3.Call;
import okhttp3.Callback;
import okhttp3.FormBody;
import okhttp3.OkHttpClient;
import okhttp3.Request;
import okhttp3.Response;
/**
* date:2018/12/2
* author:李壯(大壯)
* function:OkHttp二次封裝
*/
public class OkHttpUtils {
private static OkHttpUtils mOkHttpUtils;
private final OkHttpClient mOkHttpClient;
private Handler mHandler;
//建立一個私有的構造方法
private OkHttpUtils() {
//建立一個主執行緒Handler
mHandler = new Handler(Looper.getMainLooper());
//建立OkHttpClient
mOkHttpClient = new OkHttpClient.Builder()
.writeTimeout(10,TimeUnit.SECONDS)
.readTimeout(10,TimeUnit.SECONDS)
.connectTimeout(10,TimeUnit.SECONDS)
.build();
}
//單例模式
public static OkHttpUtils getInstance(){
if (mOkHttpUtils == null){
synchronized (OkHttpUtils.class){
if (mOkHttpUtils == null){
mOkHttpUtils = new OkHttpUtils();
}
}
}
return mOkHttpUtils;
}
//介面回撥
public interface onOkCallback{
//成功
void success(String json);
//失敗
void defeated(Exception e);
}
//封裝doPost網路請求
public void doPost(String url, Map<String,String> map, final onOkCallback okCallback){
//建立一個FormBody
FormBody.Builder builder = new FormBody.Builder();
if (map != null){
for (String key : map.keySet()){
builder.add(key,map.get(key));
}
}
FormBody formBody = builder.build();
//建立Request
Request request = new Request.Builder()
.post(formBody)
.url(url)
.build();
//建立Call物件
Call call = mOkHttpClient.newCall(request);
//通過call呼叫enqueue方法,完成網路請求
call.enqueue(new Callback() {
@Override
public void onFailure(Call call, final IOException e) {
if (okCallback != null){
mHandler.post(new Runnable() {
@Override
public void run() {
okCallback.defeated(e);
}
});
}
}
@Override
public void onResponse(Call call, Response response) throws IOException {
if (response != null && response.isSuccessful()){
final String json = response.body().string();
if (okCallback != null){
mHandler.post(new Runnable() {
@Override
public void run() {
okCallback.success(json);
}
});
}
}
}
});
}
//封裝doGet網路請求
public void doGet(String url,final onOkCallback okCallback){
//建立Request
Request request = new Request.Builder()
.get()
.url(url)
.build();
//建立Call物件
Call call = mOkHttpClient.newCall(request);
//通過call呼叫enqueue方法,完成網路請求
call.enqueue(new Callback() {
@Override
public void onFailure(Call call, final IOException e) {
if (okCallback != null){
mHandler.post(new Runnable() {
@Override
public void run() {
okCallback.defeated(e);
}
});
}
}
@Override
public void onResponse(Call call, Response response) throws IOException {
if (response != null && response.isSuccessful()){
final String json = response.body().string();
if (okCallback != null){
mHandler.post(new Runnable() {
@Override
public void run() {
okCallback.success(json);
}
});
}
}
}
});
}
}
5.Bean類:
package com.example.weekone.bean;
import java.util.List;
public class DataItem {
private int code;
private String msg;
private DataBean data;
public int getCode() {
return code;
}
public void setCode(int code) {
this.code = code;
}
public String getMsg() {
return msg;
}
public void setMsg(String msg) {
this.msg = msg;
}
public DataBean getData() {
return data;
}
public void setData(DataBean data) {
this.data = data;
}
public static class DataBean {
private ActivityInfoBean activityInfo;
private boolean creditRecived;
private GoodsSpreeActivityBean goodsSpreeActivity;
private List<SubjectsBean> subjects;
private List<Ad1Bean> ad1;
private List<Ad5Bean> ad5;
private List<Ad8Bean> ad8;
private List<DefaultGoodsListBean> defaultGoodsList;
public ActivityInfoBean getActivityInfo() {
return activityInfo;
}
public void setActivityInfo(ActivityInfoBean activityInfo) {
this.activityInfo = activityInfo;
}
public boolean isCreditRecived() {
return creditRecived;
}
public void setCreditRecived(boolean creditRecived) {
this.creditRecived = creditRecived;
}
public GoodsSpreeActivityBean getGoodsSpreeActivity() {
return goodsSpreeActivity;
}
public void setGoodsSpreeActivity(GoodsSpreeActivityBean goodsSpreeActivity) {
this.goodsSpreeActivity = goodsSpreeActivity;
}
public List<SubjectsBean> getSubjects() {
return subjects;
}
public void setSubjects(List<SubjectsBean> subjects) {
this.subjects = subjects;
}
public List<Ad1Bean> getAd1() {
return ad1;
}
public void setAd1(List<Ad1Bean> ad1) {
this.ad1 = ad1;
}
public List<Ad5Bean> getAd5() {
return ad5;
}
public void setAd5(List<Ad5Bean> ad5) {
this.ad5 = ad5;
}
public List<Ad8Bean> getAd8() {
return ad8;
}
public void setAd8(List<Ad8Bean> ad8) {
this.ad8 = ad8;
}
public List<DefaultGoodsListBean> getDefaultGoodsList() {
return defaultGoodsList;
}
public void setDefaultGoodsList(List<DefaultGoodsListBean> defaultGoodsList) {
this.defaultGoodsList = defaultGoodsList;
}
public static class ActivityInfoBean {
private String activityAreaDisplay;
private List<ActivityInfoListBean> activityInfoList;
public String getActivityAreaDisplay() {
return activityAreaDisplay;
}
public void setActivityAreaDisplay(String activityAreaDisplay) {
this.activityAreaDisplay = activityAreaDisplay;
}
public List<ActivityInfoListBean> getActivityInfoList() {
return activityInfoList;
}
public void setActivityInfoList(List<ActivityInfoListBean> activityInfoList) {
this.activityInfoList = activityInfoList;
}
public static class ActivityInfoListBean {
private String id;
private String activityImg;
private String activityType;
private String activityData;
private String activityDataDetail;
private String activityAreaDisplay;
private String countDownEnable;
private String remark;
private int sort;
public String getId() {
return id;
}
public void setId(String id) {
this.id = id;
}
public String getActivityImg() {
return activityImg;
}
public void setActivityImg(String activityImg) {
this.activityImg = activityImg;
}
public String getActivityType() {
return activityType;
}
public void setActivityType(String activityType) {
this.activityType = activityType;
}
public String getActivityData() {
return activityData;
}
public void setActivityData(String activityData) {
this.activityData = activityData;
}
public String getActivityDataDetail() {
return activityDataDetail;
}
public void setActivityDataDetail(String activityDataDetail) {
this.activityDataDetail = activityDataDetail;
}
public String getActivityAreaDisplay() {
return activityAreaDisplay;
}
public void setActivityAreaDisplay(String activityAreaDisplay) {
this.activityAreaDisplay = activityAreaDisplay;
}
public String getCountDownEnable() {
return countDownEnable;
}
public void setCountDownEnable(String countDownEnable) {
this.countDownEnable = countDownEnable;
}
public String getRemark() {
return remark;
}
public void setRemark(String remark) {
this.remark = remark;
}
public int getSort() {
return sort;
}
public void setSort(int sort) {
this.sort = sort;
}
}
}
public static class GoodsSpreeActivityBean {
private String id;
private String name;
private String startDate;
private String endDate;
private String status;
private String startSeconds;
private String endSeconds;
private String isChecked;
private List<GoodsListBean> goodsList;
public String getId() {
return id;
}
public void setId(String id) {
this.id = id;
}
public String getName() {
return name;
}
public void setName(String name) {
this.name = name;
}
public String getStartDate() {
return startDate;
}
public void setStartDate(String startDate) {
this.startDate = startDate;
}
public String getEndDate() {
return endDate;
}
public void setEndDate(String endDate) {
this.endDate = endDate;
}
public String getStatus() {
return status;
}
public void setStatus(String status) {
this.status = status;
}
public String getStartSeconds() {
return startSeconds;
}
public void setStartSeconds(String startSeconds) {
this.startSeconds = startSeconds;
}
public String getEndSeconds() {
return endSeconds;
}
public void setEndSeconds(String endSeconds) {
this.endSeconds = endSeconds;
}
public String getIsChecked() {
return isChecked;
}
public void setIsChecked(String isChecked) {
this.isChecked = isChecked;
}
public List<GoodsListBean> getGoodsList() {
return goodsList;
}
public void setGoodsList(List<GoodsListBean> goodsList) {
this.goodsList = goodsList;
}
public static class GoodsListBean {
private String id;
private String goodsSpreeId;
private String goodsId;
private String goodsName;
private String goodsImg;
private int marketPrice;
private double activityPrice;
private int salesRatio;
private int stockNumber;
private int releaseNumber;
public String getId() {
return id;
}
public void setId(String id) {
this.id = id;
}
public String getGoodsSpreeId() {
return goodsSpreeId;
}
public void setGoodsSpreeId(String goodsSpreeId) {
this.goodsSpreeId = goodsSpreeId;
}
public String getGoodsId() {
return goodsId;
}
public void setGoodsId(String goodsId) {
this.goodsId = goodsId;
}
public String getGoodsName() {
return goodsName;
}
public void setGoodsName(String goodsName) {
this.goodsName = goodsName;
}
public String getGoodsImg() {
return goodsImg;
}
public void setGoodsImg(String goodsImg) {
this.goodsImg = goodsImg;
}
public int getMarketPrice() {
return marketPrice;
}
public void setMarketPrice(int marketPrice) {
this.marketPrice = marketPrice;
}
public double getActivityPrice() {
return activityPrice;
}
public void setActivityPrice(double activityPrice) {
this.activityPrice = activityPrice;
}
public int getSalesRatio() {
return salesRatio;
}
public void setSalesRatio(int salesRatio) {
this.salesRatio = salesRatio;
}
public int getStockNumber() {
return stockNumber;
}
public void setStockNumber(int stockNumber) {
this.stockNumber = stockNumber;
}
public int getReleaseNumber() {
return releaseNumber;
}
public void setReleaseNumber(int releaseNumber) {
this.releaseNumber = releaseNumber;
}
}
}
public static class SubjectsBean {
private String id;
private String title;
private String detail;
private String image;
private String start_time;
private String end_time;
private int show_number;
private String state;
private int sort;
private String descImage;
private String template;
private String url;
private String wapUrl;
private List<GoodsListBeanX> goodsList;
private List<String> goodsIdsList;
private List<GoodsRelationListBean> goodsRelationList;
public String getId() {
return id;
}
public void setId(String id) {
this.id = id;
}
public String getTitle() {
return title;
}
public void setTitle(String title) {
this.title = title;
}
public String getDetail() {
return detail;
}
public void setDetail(String detail) {
this.detail = detail;
}
public String getImage() {
return image;
}
public void setImage(String image) {
this.image = image;
}
public String getStart_time() {
return start_time;
}
public void setStart_time(String start_time) {
this.start_time = start_time;
}
public String getEnd_time() {
return end_time;
}
public void setEnd_time(String end_time) {
this.end_time = end_time;
}
public int getShow_number() {
return show_number;
}
public void setShow_number(int show_number) {
this.show_number = show_number;
}
public String getState() {
return state;
}
public void setState(String state) {
this.state = state;
}
public int getSort() {
return sort;
}
public void setSort(int sort) {
this.sort = sort;
}
public String getDescImage() {
return descImage;
}
public void setDescImage(String descImage) {
this.descImage = descImage;
}
public String getTemplate() {
return template;