MVP框架搭建OkHttp做網路請求RecyClerView做列表展示頁面
阿新 • • 發佈：2018-11-23
首先匯入build.gradle中需要用到的依賴
implementation ‘com.google.code.gson:gson:2.8.5’
compile ‘com.android.support:recyclerview-v7:27.1.1’
compile ‘com.squareup.okhttp3:okhttp:3.9.0’
在AndroidManifest.xml中新增網路許可權以及工具類的屬性name
application下的android:name=".application.MyApplication" 首先看看所有的分包，MVP搭建  
接下來就是佈局檔案main_actvity.xml中一個RecyclerView展示列表的控制元件
<android.support.v7.widget.RecyclerView
android:id="@+id/rv_news"
android:layout_width=“match_parent”
android:layout_height=“match_parent”></android.support.v7.widget.RecyclerView>
介面卡中一個Imagview和兩個textview控制元件
<?xml version="1.0" encoding="utf-8"?>
首先建一個news類為網路請求的資料
package com.example.newweek301.bean;
import java.util.List;
/**
- Created by 遷就 on 2018/11/17.
*/
public class News {
/** * msg : 成功的返回 * code : 1 * data : [{"uniquekey":"1326bf3c4505783d4a964f81b6220e9d","title":"美國被特朗普坑慘了！又有3個鐵桿盟友公開唱對臺戲！","date":"2018-05-12 07:25","category":"頭條","author_name":"大國軍情","url":"http://mini.eastday.com/mobile/180512072544020.html","thumbnail_pic_s":"http://04.imgmini.eastday.com/mobile/20180512/20180512_fe1bf1b6ec00098f9455c84dc81e6763_cover_mwpm_03200403.jpg","thumbnail_pic_s02":"http://04.imgmini.eastday.com/mobile/20180512/20180512_3f636fca330f2311583896aed3185196_cover_mwpm_03200403.jpg","thumbnail_pic_s03":"http://04.imgmini.eastday.com/mobile/20180512/20180512_793fab03dadcd417bf2d8e5e1e48a0f5_cover_mwpm_03200403.jpg"},{"uniquekey":"9db153b507c10bbbed1d26c29c030eef","title":"第71屆戛納電影節：賈樟柯電影《江湖兒女》首映","date":"2018-05-12 07:25","category":"頭條","author_name":"新華網","url":"http://mini.eastday.com/mobile/180512072505095.html","thumbnail_pic_s":"http://01.imgmini.eastday.com/mobile/20180512/20180512072505_0fe08f494e7c090764244e3581b3e5ca_5_mwpm_03200403.jpg","thumbnail_pic_s02":"http://01.imgmini.eastday.com/mobile/20180512/20180512072505_0fe08f494e7c090764244e3581b3e5ca_1_mwpm_03200403.jpg","thumbnail_pic_s03":"http://01.imgmini.eastday.com/mobile/20180512/20180512072505_0fe08f494e7c090764244e3581b3e5ca_3_mwpm_03200403.jpg"},{"uniquekey":"4f47eb31b188cfa90881260bb2b11aa8","title":"以色列發射60枚火箭彈對伊朗進行報復，中東小霸王稱號保不住了","date":"2018-05-12 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String msg; private int code; private List<DataBean> data; public String getMsg() { return msg; } public void setMsg(String msg) { this.msg = msg; } public int getCode() { return code; } public void setCode(int code) { this.code = code; } public List<DataBean> getData() { return data; } public void setData(List<DataBean> data) { this.data = data; } public static class DataBean { /** * uniquekey : 1326bf3c4505783d4a964f81b6220e9d * title : 美國被特朗普坑慘了！又有3個鐵桿盟友公開唱對臺戲！ * date : 2018-05-12 07:25 * category : 頭條 * author_name : 大國軍情 * url : http://mini.eastday.com/mobile/180512072544020.html * thumbnail_pic_s : http://04.imgmini.eastday.com/mobile/20180512/20180512_fe1bf1b6ec00098f9455c84dc81e6763_cover_mwpm_03200403.jpg * thumbnail_pic_s02 : http://04.imgmini.eastday.com/mobile/20180512/20180512_3f636fca330f2311583896aed3185196_cover_mwpm_03200403.jpg * thumbnail_pic_s03 : http://04.imgmini.eastday.com/mobile/20180512/20180512_793fab03dadcd417bf2d8e5e1e48a0f5_cover_mwpm_03200403.jpg */ private String uniquekey; private String title; private String date; private String category; private String author_name; private String url; private String thumbnail_pic_s; private String thumbnail_pic_s02; private String thumbnail_pic_s03; public String getUniquekey() { return uniquekey; } public void setUniquekey(String uniquekey) { this.uniquekey = uniquekey; } public String getTitle() { return title; } public void setTitle(String title) { this.title = title; } public String getDate() { return date; } public void setDate(String date) { this.date = date; } public String getCategory() { return category; } public void setCategory(String category) { this.category = category; } public String getAuthor_name() { return author_name; } public void setAuthor_name(String author_name) { this.author_name = author_name; } public String getUrl() { return url; } public void setUrl(String url) { this.url = url; } public String getThumbnail_pic_s() { return thumbnail_pic_s; } public void setThumbnail_pic_s(String thumbnail_pic_s) { this.thumbnail_pic_s = thumbnail_pic_s; } public String getThumbnail_pic_s02() { return thumbnail_pic_s02; } public void setThumbnail_pic_s02(String thumbnail_pic_s02) { this.thumbnail_pic_s02 = thumbnail_pic_s02; } public String getThumbnail_pic_s03() { return thumbnail_pic_s03; } public void setThumbnail_pic_s03(String thumbnail_pic_s03) { this.thumbnail_pic_s03 = thumbnail_pic_s03; } }
}
接下來就是MVP分包了
view層
public interface IRecyView {
void showRecy(List<News.DataBean> list);
}
model層兩個
1：
public interface IRecyModel {
void recy(Callback callback);
}
2：
public class RecyModel implements IRecyModel{
@Override
public void recy(Callback callback) {//請求資料的網址
OkHttpUtils.getInStance().doGet("http://www.xieast.com/api/news/news.php",callback);
}
}
presenter層
public class RecyPresenter {
private IRecyView view;
private IRecyModel model;
public RecyPresenter(IRecyView view) {
this.view = view;
model = new RecyModel();
}
public void showRecy(){
model.recy(new OnUiCallback() {
private ArrayList<News.DataBean> dataBeans;
@Override
public void onFailed(Call call, IOException e) {
}
@Override
public void onSuccess(String result) throws IOException {
Log.i("ss",result);
Gson gson = new Gson();
News news = gson.fromJson(result, News.class);
dataBeans = (ArrayList<News.DataBean>) news.getData();
view.showRecy(this.dataBeans);
}
});
}
public void onDestory(){
view = null;
}
}
兩個utils層
1：
public class OkHttpUtils {
private Handler handler = new Handler(Looper.getMainLooper());
public Handler getHandler(){
return handler;
}
//單例
private static OkHttpUtils okHttpUtils = new OkHttpUtils();
private OkHttpUtils(){};
public static OkHttpUtils getInStance(){
return okHttpUtils;
}
private OkHttpClient client;
private void initOkHttpClient(){
if (client == null){
client = new OkHttpClient.Builder().build();
}
}
//公用的get請求方法，完成的功能不確定
public void doGet(String url, Callback callback){
initOkHttpClient();
Request request = new Request.Builder().addHeader(“User-Agent”, “”).url(url).build();
Call call = client.newCall(request);
call.enqueue(callback);
}
}
2：
public abstract class OnUiCallback implements Callback{
private Handler handler = OkHttpUtils.getInStance().getHandler();
public abstract void onFailed(Call call, IOException e);
public abstract void onSuccess(String result) throws IOException;
@Override
public void onFailure(final Call call, final IOException e) {
handler.post(new Runnable() {
@Override
public void run() {
onFailed(call,e);
}
});
}
@Override
public void onResponse(final Call call, final Response response) throws IOException {
final String result = response.body().string();
//該方式 存在問題 網路請求也跑到了主執行緒 待解決
handler.post(new Runnable() {
@Override
public void run() {
try {
onSuccess(result);
} catch (IOException e) {
e.printStackTrace();
}
}
});
}
}
一個請求圖片的工具類
public class MyApplication extends Application {
@Override
public void onCreate() {
super.onCreate();
ImageLoaderConfiguration configuration = new ImageLoaderConfiguration.Builder(this).build();
ImageLoader.getInstance().init(configuration);
}
}
介面卡
public class RvAdapter extends RecyclerView.Adapter<RvAdapter.ViewHolder> {
private Context context;
private List<News.DataBean> list;
public RvAdapter(Context context, List<News.DataBean> list) {
this.context = context;
this.list = list;
}
@Override
public ViewHolder onCreateViewHolder(ViewGroup parent, int viewType) {
View inflate = View.inflate(context, R.layout.rv_news, null);
ViewHolder holder = new ViewHolder(inflate);
return holder;
}
@Override
public void onBindViewHolder(ViewHolder holder, int position) {
holder.txtTitle.setText(list.get(position).getTitle());
holder.txtTitme.setText(list.get(position).getDate());
ImageLoader.getInstance().displayImage(list.get(position).getThumbnail_pic_s(),holder.imgLogo);
}
@Override
public int getItemCount() {
return list.size();
}
public class ViewHolder extends RecyclerView.ViewHolder {
private final ImageView imgLogo;
private final TextView txtTitle;
private final TextView txtTitme;
public ViewHolder(View itemView) {
super(itemView);
imgLogo = itemView.findViewById(R.id.img_logo);
txtTitle = itemView.findViewById(R.id.txt_title);
txtTitme = itemView.findViewById(R.id.txt_time);
}
}
}
最後的MainActvity
public class MainActivity extends Activity implements IRecyView {
private RecyclerView rvNews;
private RecyPresenter presenter;
private List<News.DataBean> list;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
initView();
presenter = new RecyPresenter(this);
presenter.showRecy();
list = new ArrayList<>();
}
private void initView() {
rvNews = findViewById(R.id.rv_news)；
LinearLayoutManager manager = new LinearLayoutManager(this);
manager.setOrientation(LinearLayoutManager.VERTICAL);
rvNews.setLayoutManager(manager);
}
@Override
public void showRecy(List<News.DataBean> list) {
//載入更多的方法
RvAdapter adapter = new RvAdapter(this,list);
rvNews.setAdapter(adapter);
}
}