MVP+RecyclerView+SmartRefreshLayout 實現重新整理載入
阿新 • • 發佈：2019-01-23
一、view層介面 （IView）
package com.xwj.lenovo.my_mvp_two.view;
/**
* Created by lenovo on 2018/5/7.
*/
public interface IView {
void getSuccess(String string);
void getError(String error);
}
二、IPresenter層
1.（IPresenter）介面
package com.xwj.lenovo.my_mvp_two.presenter;
import java.util.Map;
/**
* Created by lenovo on 2018/5/7.
*/ 2.IPresenter的實現類 （IPresenterImpI）
package com.xwj.lenovo.my_mvp_two.presenter;
import com.xwj.lenovo.my_mvp_two.model.IModelmpI;
import 三、model層
1、model層介面 （IModel）
package com.xwj.lenovo.my_mvp_two.model;
import java.util.Map;
/**
* Created by lenovo on 2018/5/7.
*/
public interface IModel {
void getData(String url, Map<String,String> map);
}
2.model層的實現類 （IModelmpI ）
注意：下面 判斷時根據自己的bean類，去決定要判斷的值，我這裡是狀態，狀態為false時，獲取資料，一般大部分都是code=0為成功，不要寫錯呦！
package com.xwj.lenovo.my_mvp_two.model;
import android.util.Log;
import com.xwj.lenovo.my_mvp_two.http.RetrofitUtils;
import com.xwj.lenovo.my_mvp_two.presenter.IPresenter;
import org.json.JSONException;
import org.json.JSONObject;
import java.io.IOException;
import java.util.Map;
import io.reactivex.Observer;
import io.reactivex.android.schedulers.AndroidSchedulers;
import io.reactivex.disposables.Disposable;
import io.reactivex.schedulers.Schedulers;
import okhttp3.ResponseBody;
/**
* Created by lenovo on 2018/5/7.
*/
public class IModelmpI implements IModel {
IPresenter iPresenter;
//構造方法
public IModelmpI(IPresenter iPresenter) {
this.iPresenter = iPresenter;
}
@Override
public void getData(String url, Map<String, String> map) {
RetrofitUtils.getService().getDataGetView(url,map)
.observeOn(AndroidSchedulers.mainThread())
.subscribeOn(Schedulers.io())
.subscribe(new Observer<ResponseBody>() {
@Override
public void onSubscribe(Disposable d) {
}
@Override
public void onNext(ResponseBody responseBody) {
try {
String string = responseBody.string();
try {
JSONObject jsonObject = new JSONObject(string);
String error = jsonObject.getString("error");
//判斷狀態為false時，獲取資料------》根據自己的bean類決定自己要判斷的引數
if ("false".equals(error)){
iPresenter.getSuccess(string);
}else {
//失敗的回撥
iPresenter.getError(string);
}
} catch (JSONException e) {
e.printStackTrace();
//失敗的回撥
iPresenter.getError(string);
}
} catch (IOException e) {
e.printStackTrace();
}
}
@Override
public void onError(Throwable e) {
Log.d("IModelmpI", "出現異常----------------------"+e.getMessage());
}
@Override
public void onComplete() {
}
});
}
}
四、需要用到的 ApiService
裡面是需要用到的兩種請求方式
package com.xwj.lenovo.my_mvp_two.http;
import java.util.Map;
import io.reactivex.Observable;
import okhttp3.ResponseBody;
import retrofit2.http.FieldMap;
import retrofit2.http.FormUrlEncoded;
import retrofit2.http.GET;
import retrofit2.http.POST;
import retrofit2.http.Path;
import retrofit2.http.QueryMap;
/**
* Created by lenovo on 2018/5/7.
*/
public interface ApiService {
//get請求
@GET("{url}")
Observable<ResponseBody> getDataGetView(@Path(value = "url", encoded = true) String url, @QueryMap Map<String, String> map);
//Post請求
@FormUrlEncoded
@POST("{url}")
Observable<ResponseBody> getDataPostView(@Path(value = "url", encoded = true) String url, @FieldMap Map<String, String> map);
}
五、RetrofitUtils 工具類
package com.xwj.lenovo.my_mvp_two.http;
import android.util.Log;
import java.io.IOException;
import java.util.HashMap;
import java.util.List;
import java.util.Map;
import okhttp3.FormBody;
import okhttp3.Interceptor;
import okhttp3.MultipartBody;
import okhttp3.OkHttpClient;
import okhttp3.Request;
import okhttp3.RequestBody;
import okhttp3.Response;
import retrofit2.Retrofit;
import retrofit2.adapter.rxjava2.RxJava2CallAdapterFactory;
import retrofit2.converter.gson.GsonConverterFactory;
/**
* Created by Administrator on 2018/4/9 0009.
*/
public class RetrofitUtils {
private Retrofit retrofit;
private static RetrofitUtils retrofitUtils = null;
public RetrofitUtils() {
}
public RetrofitUtils(String baseUrl) {
OkHttpClient okHttpClient = new OkHttpClient.Builder()
.addInterceptor(new CommonParamsInterceptor())
.build();
retrofit = new Retrofit.Builder()
.baseUrl(baseUrl)
.client(okHttpClient)
.addConverterFactory(GsonConverterFactory.create())
.addCallAdapterFactory(RxJava2CallAdapterFactory.create())
.build();
}
public static RetrofitUtils getInstance(String baseUrl) {
if (retrofitUtils == null) {
synchronized (RetrofitUtils.class) {
if (retrofitUtils == null) {
retrofitUtils = new RetrofitUtils(baseUrl);
}
}
}
return retrofitUtils;
}
public <T> T createService(Class<T> service) {
return retrofit.create(service);
}
public static ApiService getService() {
return RetrofitUtils.getInstance(HttpConfig.base_url).createService(ApiService.class);
}
//攔截器
public class CommonParamsInterceptor implements Interceptor {
@Override
public Response intercept(Chain chain) throws IOException {
//呼叫request()方法得到攔截的請求
Request request = chain.request();
//獲取請求的方式
String method = request.method();//GET POST
//攔截的請求的路徑
String oldUrl = request.url().toString();
Log.e("----oldUrl", oldUrl);
//要新增的公共引數...map
Map<String, String> map = new HashMap<>();
map.put("source", "android");
map.put("appVersion", "100");
if ("GET".equals(method)) {
StringBuilder stringBuilder = new StringBuilder();//建立一個stringBuilder...字串緩衝區
stringBuilder.append(oldUrl);
if (oldUrl.contains("?")) {
//?在最後面....2型別
if (oldUrl.indexOf("?") == oldUrl.length() - 1) {
} else {
//3型別...拼接上&
stringBuilder.append("&");
}
} else {
//不包含? 屬於1型別,,,先拼接上?號
stringBuilder.append("?");
}
//新增公共引數....source=android&appVersion=100&
for (Map.Entry<String, String> entry : map.entrySet()) {
//拼接
stringBuilder.append(entry.getKey())
.append("=")
.append(entry.getValue())
.append("&");
}
//刪掉最後一個&符號
if (stringBuilder.indexOf("&") != -1) {
stringBuilder.deleteCharAt(stringBuilder.lastIndexOf("&"));
}
//得到含有公共引數的新路徑.....使用新路徑去請求
String newUrl = stringBuilder.toString();
Log.e("----newUrl", newUrl);
//新的路徑構建一個新的請求
request = request.newBuilder().url(newUrl).build();
} else if ("POST".equals(method)) {
//引數在請求的實體內容上....拿到以前的引數,把以前的引數和公共引數全都新增到請求實體上
RequestBody requestBody = request.body();
if (requestBody instanceof FormBody) {//前邊是不是後邊的子類/例項物件
FormBody oldBody = (FormBody) requestBody;//keywords...page
FormBody.Builder builder = new FormBody.Builder();
//先新增之前的引數
for (int i = 0; i < oldBody.size(); i++) {
//鍵值對的形式新增
builder.add(oldBody.name(i), oldBody.value(i));
}
//新增公共引數
for (Map.Entry<String, String> entry : map.entrySet()) {
builder.add(entry.getKey(), entry.getValue());
}
//構建一個新的請求
request = request.newBuilder().url(oldUrl).post(builder.build()).build();
} else if (request.body() instanceof MultipartBody) {
MultipartBody body = (MultipartBody) request.body();
MultipartBody.Builder builder = new MultipartBody.Builder().setType(MultipartBody.FORM);
builder.addFormDataPart("source", "android")
.addFormDataPart("appVersion", "101");
List<MultipartBody.Part> parts = body.parts();
for (MultipartBody.Part part : parts) {
builder.addPart(part);
}
request = request.newBuilder().url(oldUrl).post(builder.build()).build();
}
}
//執行請求 獲取到響應
Response response = chain.proceed(request);
return response;
}
}
}
六、MainActivity的佈局
<?xml version="1.0" encoding="utf-8"?>
<com.scwang.smartrefresh.layout.SmartRefreshLayout xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:app="http://schemas.android.com/apk/res-auto"
android:id="@+id/refreshLayout"
xmlns:tools="http://schemas.android.com/tools"
android:layout_width="match_parent"
android:layout_height="match_parent"
tools:context="com.xwj.lenovo.my_mvp_two.MainActivity">
<android.support.v7.widget.RecyclerView
android:id="@+id/recy_view"
android:layout_width="match_parent"
android:layout_height="match_parent"></android.support.v7.widget.RecyclerView>
</com.scwang.smartrefresh.layout.SmartRefreshLayout>
七、MainActivity中做的具體操作
package com.xwj.lenovo.my_mvp_two;
import android.os.Bundle;
import android.support.v7.app.AppCompatActivity;
import android.support.v7.widget.LinearLayoutManager;
import android.support.v7.widget.RecyclerView;
import android.util.Log;
import com.google.gson.Gson;
import com.scwang.smartrefresh.layout.api.RefreshLayout;
import com.scwang.smartrefresh.layout.listener.OnLoadmoreListener;
import com.scwang.smartrefresh.layout.listener.OnRefreshListener;
import com.xwj.lenovo.my_mvp_two.adpter.MyRecylerView;
import com.xwj.lenovo.my_mvp_two.bean.MyBean;
import com.xwj.lenovo.my_mvp_two.http.HttpConfig;
import com.xwj.lenovo.my_mvp_two.presenter.IPresenterImpI;
import com.xwj.lenovo.my_mvp_two.view.IView;
import java.util.HashMap;
import java.util.List;
import java.util.Map;
import butterknife.BindView;
import butterknife.ButterKnife;
public class MainActivity extends AppCompatActivity implements IView {
int page = 1;
@BindView(R.id.recy_view)
RecyclerView recyView;
@BindView(R.id.refreshLayout)
com.scwang.smartrefresh.layout.SmartRefreshLayout refreshLayout;
private IPresenterImpI iPresenterImpI;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
ButterKnife.bind(this);
//佈局管理器
recyView.setLayoutManager(new LinearLayoutManager(this));
//呼叫MVP
iPresenterImpI = new IPresenterImpI(this);
//獲取資料的方法
initview();
}
private void initview() {
Map<String, String> map = new HashMap<>();
iPresenterImpI.getData(HttpConfig.data_url + page, map);
}
/**
* 重寫的view 層的方法
* @param string
*/
@Override
public void getSuccess(String string) {
MyBean myBean = new Gson().fromJson(string, MyBean.class);
List<MyBean.ResultsBean> list = myBean.getResults();
MyRecylerView myRecylerView = new MyRecylerView(this, list);
recyView.setAdapter(myRecylerView);
//SmartRefreshLayout控制元件的重新整理
refreshLayout.setOnRefreshListener(new OnRefreshListener() {
@Override
public void onRefresh(RefreshLayout refreshlayout) {
page = 1;
//重新載入資料
initview();
//3秒以後關閉重新整理的檢視
refreshlayout.finishRefresh(4000);
}
});
//SmartRefreshLayout控制元件的載入
refreshLayout.setOnLoadmoreListener(new OnLoadmoreListener() {
@Override
public void onLoadmore(RefreshLayout refreshlayout) {
//頁數++ 進行載入下一頁
page++;
//重新載入資料
initview();
//3秒以後關閉載入的檢視
refreshlayout.finishLoadmore(3000);
}
});
}
//失敗的方法
@Override
public void getError(String error) {
Log.d("MainActivity", "失敗啦！-----》"+error);
}
}接下來就是寫介面卡了，我用的是RecyclerView，相信RecyclerView的介面卡大家都會寫的，這裡就不貼出來啦！
這樣一個通過mvp框架+RecyclerView展示資料+第三方控制元件SmartRefreshLayout進行重新整理的小demo就完成啦！
對了，小夥伴們不要忘記加許可權哦！
效果基本就是下面這樣：
