andriod——Retrofit+Fresco+MVP接口拼接传值

来源：互联网发布：知乎十号胖狐狸编辑：程序博客网时间：2024/05/01 03:52

首先网络权限<uses-permission android:name="android.permission.INTERNET"/>

其次导入依赖包

dependencies {    implementation fileTree(dir: 'libs', include: ['*.jar'])    implementation 'com.android.support:appcompat-v7:26.1.0'    implementation 'com.android.support.constraint:constraint-layout:1.0.2'    testImplementation 'junit:junit:4.12'    androidTestImplementation 'com.android.support.test:runner:1.0.1'    androidTestImplementation 'com.android.support.test.espresso:espresso-core:3.0.1'    compile 'com.google.code.gson:gson:2.2.4'    compile 'com.facebook.fresco:fresco:0.11.0'    compile 'io.reactivex:rxjava:1.0.14'    compile 'io.reactivex:rxandroid:1.0.1'    compile 'com.squareup.retrofit2:converter-gson:2.0.0-beta4'    compile 'com.squareup.retrofit2:adapter-rxjava:2.0.0-beta4'    compile 'com.squareup.okhttp3:okhttp:3.9.0'    compile 'com.jakewharton:butterknife:8.5.1'    annotationProcessor 'com.jakewharton:butterknife-compiler:8.5.1'    compile 'com.android.support:recyclerview-v7:26.1.0'    compile 'com.github.bumptech.glide:glide:3.7.0'}

adapter

package com.example.xie_20171205.adapter;import android.content.Context;import android.support.v7.widget.RecyclerView;import android.view.View;import android.view.ViewGroup;import android.widget.TextView;import com.example.xie_20171205.R;import com.example.xie_20171205.bean.Bean;import com.facebook.drawee.backends.pipeline.Fresco;import com.facebook.drawee.interfaces.DraweeController;import com.facebook.drawee.view.SimpleDraweeView;public class Myadapter extends RecyclerView.Adapter<Myadapter.MyViewHolder> {    Context context;    Bean bean;    public Myadapter(Context context, Bean bean) {        this.context = context;        this.bean = bean;    }    @Override    public MyViewHolder onCreateViewHolder(ViewGroup parent, int viewType) {        View view = View.inflate(context, R.layout.item, null);        MyViewHolder holder = new MyViewHolder(view);        return holder;    }    @Override    public void onBindViewHolder(MyViewHolder holder, int position) {        holder.tv1.setText(bean.getNewslist().get(position).getTitle());        holder.tv2.setText(bean.getNewslist().get(position).getCtime());        DraweeController dc = Fresco.newDraweeControllerBuilder()                .setUri(bean.getNewslist().get(position).getPicUrl())                .setAutoPlayAnimations(true)                .build();        holder.img.setController(dc);    }    @Override    public int getItemCount() {        return bean.getNewslist().size();    }    class MyViewHolder extends RecyclerView.ViewHolder {        private final SimpleDraweeView img;        private final TextView tv1,tv2;        public MyViewHolder(View itemView) {            super(itemView);            img =  itemView.findViewById(R.id.img);            tv1 = itemView.findViewById(R.id.tv1);            tv2 = itemView.findViewById(R.id.tv2);        }    }}

Bean

http://api.tianapi.com/nba/?key=71e58b5b2f930eaf1f937407acde08fe&num=10

model——Imodel

package com.example.xie_20171205.model;import com.example.xie_20171205.bean.Bean;import rx.Observer;public interface Imodel {    //将观察者传（bean）进去    public void shuju(int num,Observer<Bean> observer);}

model——Model
package com.example.xie_20171205.model;import com.example.xie_20171205.GetRequest_In;import com.example.xie_20171205.bean.Bean;import okhttp3.OkHttpClient;import retrofit2.Call;import retrofit2.Callback;import retrofit2.Response;import retrofit2.Retrofit;import retrofit2.adapter.rxjava.RxJavaCallAdapterFactory;import retrofit2.converter.gson.GsonConverterFactory;import rx.Observable;import rx.Observer;import rx.Subscriber;import rx.android.schedulers.AndroidSchedulers;import rx.schedulers.Schedulers;public class Model implements Imodel{    private Bean bean;    @Override    public void shuju(final int num, Observer<Bean> observer) {        //创建被观察者        Observable.create(new Observable.OnSubscribe<Bean>() {            @Override            public void call(final Subscriber<? super Bean> subscriber) {                //拦截器的使用                OkHttpClient oc=new OkHttpClient.Builder().build();                //Retrofit的请求数据                Retrofit retrofit=new Retrofit.Builder()                        //添加拦截器                        .client(oc)                        //设置网络请求的url                        .baseUrl("http://api.tianapi.com/nba/")                        //设置Gson                        .addConverterFactory(GsonConverterFactory.create())                        //设置Rxjava                        .addCallAdapterFactory(RxJavaCallAdapterFactory.create())                        .build();                //创建网络请求接口的实例                GetRequest_In Request=retrofit.create(GetRequest_In.class);                //对发的请求进行封装                Call<Bean> call=Request.getCall(num);                //使用异步发送网络请求                call.enqueue(new Callback<Bean>(){                    //请求成功时回调                    @Override                    public void onResponse(Call<Bean> call, Response<Bean> response) {                        bean=response.body();                        //调用OnNext方法把值传给观察者                        subscriber.onNext(bean);                        subscriber.onCompleted();                    }                    //请求失败时的回调                    @Override                    public void onFailure(Call<Bean> call, Throwable t) {                    }                });            }        }).subscribeOn(Schedulers.newThread()).observeOn(AndroidSchedulers.mainThread())                .subscribe(observer);    }}

persenter——Persenter
package com.example.xie_20171205.persenter;import android.content.Context;import com.example.xie_20171205.bean.Bean;import com.example.xie_20171205.model.Model;import com.example.xie_20171205.view.Iview;import rx.Observer;public class Persenter {    //定义属性    Context context;    Model mm;    Iview vv;    public Persenter(Context context, Iview vv) {        this.context = context;        this.vv = vv;        mm=new Model();    }    //创建方法    public void getData(){        int num=vv.getNum();        mm.shuju(num,new Observer<Bean>() {            @Override            public void onCompleted() {            }            @Override            public void onError(Throwable e) {            }            //将bean的值让V层接受            @Override            public void onNext(Bean bean) {                vv.ShowView(bean);            }        });    }}

view——Iview
package com.example.xie_20171205.view;import com.example.xie_20171205.bean.Bean;public interface Iview {    //方法有参bean    public void ShowView(Bean bean);    public int getNum();}

GetRequest_In
package com.example.xie_20171205;import com.example.xie_20171205.bean.Bean;import retrofit2.Call;import retrofit2.http.GET;import retrofit2.http.Query;public interface GetRequest_In {    @GET("?key=71e58b5b2f930eaf1f937407acde08fe&num=10")    Call<Bean> getCall(@Query("num") int num);}

MainActivity
package com.example.xie_20171205;import android.support.v7.app.AppCompatActivity;import android.os.Bundle;import android.support.v7.widget.DividerItemDecoration;import android.support.v7.widget.LinearLayoutManager;import android.support.v7.widget.RecyclerView;import com.example.xie_20171205.adapter.Myadapter;import com.example.xie_20171205.bean.Bean;import com.example.xie_20171205.persenter.Persenter;import com.example.xie_20171205.view.Iview;import com.facebook.drawee.backends.pipeline.Fresco;import butterknife.BindView;import butterknife.ButterKnife;public class MainActivity extends AppCompatActivity implements Iview {    @BindView(R.id.rv)    RecyclerView rv;    int num=10;    Persenter pp;    Myadapter rvadapter;    @Override    protected void onCreate(Bundle savedInstanceState) {        super.onCreate(savedInstanceState);        Fresco.initialize(this);        setContentView(R.layout.activity_main);        ButterKnife.bind(this);        pp=new Persenter(this,this);        pp.getData();    }    @Override    public void ShowView(Bean bean) {        LinearLayoutManager manager=new LinearLayoutManager(this);        rv.setLayoutManager(manager);        rv.addItemDecoration(new DividerItemDecoration(this,DividerItemDecoration.VERTICAL));        rvadapter=new Myadapter(this,bean);        rv.setAdapter(rvadapter);    }    @Override    public int getNum() {        return num;    }}

OkHttp3Utils

package com.example.xie_20171205;import android.content.Intent;import android.net.Uri;import android.os.Environment;import android.util.Log;import android.widget.Toast;import java.io.File;import java.io.FileOutputStream;import java.io.IOException;import java.io.InputStream;import java.util.Map;import java.util.concurrent.TimeUnit;import okhttp3.Cache;import okhttp3.Call;import okhttp3.Callback;import okhttp3.FormBody;import okhttp3.MediaType;import okhttp3.MultipartBody;import okhttp3.OkHttpClient;import okhttp3.Request;import okhttp3.RequestBody;import okhttp3.Response;public class OkHttp3Utils {    private static OkHttpClient okHttpClient = null;    public OkHttp3Utils() {    }    public static OkHttpClient getInstance() {        if (okHttpClient == null) {            //加同步安全            synchronized (OkHttp3Utils.class) {                if (okHttpClient == null) {                    //判空 为空创建实例                    // okHttpClient = new OkHttpClient();                    //  File sdcache = getExternalCacheDir();                    File sdcache = new File(Environment.getExternalStorageDirectory(), "cache");                    int cacheSize = 10 * 1024 * 1024;                    okHttpClient = new OkHttpClient.Builder().connectTimeout(15, TimeUnit.SECONDS)                            .writeTimeout(20, TimeUnit.SECONDS).readTimeout(20, TimeUnit.SECONDS).cache(new Cache(sdcache.getAbsoluteFile(), cacheSize)).build();                }            }        }        return okHttpClient;    }    public static void doGet(String url, Callback callback) {        //创建OkHttpClient请求对象        OkHttpClient okHttpClient = getInstance();        //创建Request        Request request = new Request.Builder().url(url).build();        //得到Call对象        Call call = okHttpClient.newCall(request);        //执行异步请求        call.enqueue(callback);    }    public static void doPost(String url, Map<String, String> params, Callback callback) {        //创建OkHttpClient请求对象        OkHttpClient okHttpClient = getInstance();        //3.x版本post请求换成FormBody 封装键值对参数        FormBody.Builder builder = new FormBody.Builder();        //遍历集合        for (String key : params.keySet()) {            builder.add(key, params.get(key));        }        //创建Request        Request request = new Request.Builder().url(url).post(builder.build()).build();        Call call = okHttpClient.newCall(request);        call.enqueue(callback);    }    public static void uploadPic(String url, File file, String fileName) {        //创建OkHttpClient请求对象        OkHttpClient okHttpClient = getInstance();        //创建RequestBody 封装file参数        RequestBody fileBody = RequestBody.create(MediaType.parse("application/octet-stream"), file);        //创建RequestBody 设置类型等        RequestBody requestBody = new MultipartBody.Builder().setType(MultipartBody.FORM).addFormDataPart("file", fileName, fileBody).build();        //创建Request        Request request = new Request.Builder().url(url).post(requestBody).build();        //得到Call        Call call = okHttpClient.newCall(request);        //执行请求        call.enqueue(new Callback() {            @Override            public void onFailure(Call call, IOException e) {            }            @Override            public void onResponse(Call call, Response response) throws IOException {                //上传成功回调 目前不需要处理            }        });    }    public static void doPostJson(String url, String jsonParams, Callback callback) {        RequestBody requestBody = RequestBody.create(MediaType.parse("application/json; charset=utf-8"), jsonParams);        Request request = new Request.Builder().url(url).post(requestBody).build();        Call call = getInstance().newCall(request);        call.enqueue(callback);    }    public static void download(final MainActivity context, final String url, final String saveDir) {        Request request = new Request.Builder().url(url).build();        Call call = getInstance().newCall(request);        call.enqueue(new Callback() {            @Override            public void onFailure(Call call, IOException e) {                Log.i("xxx", e.toString());            }            @Override            public void onResponse(Call call, final Response response) throws IOException {                InputStream is = null;                byte[] buf = new byte[2048];                int len = 0;                FileOutputStream fos = null;                try {                    is = response.body().byteStream();                    //apk保存路径                    final String fileDir = isExistDir(saveDir);                    //文件                    File file = new File(fileDir, getNameFromUrl(url));                    context.runOnUiThread(new Runnable() {                        @Override                        public void run() {                            Toast.makeText(context, "下载成功:" + fileDir + "," + getNameFromUrl(url), Toast.LENGTH_SHORT).show();                        }                    });                    fos = new FileOutputStream(file);                    while ((len = is.read(buf)) != -1) {                        fos.write(buf, 0, len);                    }                    fos.flush();                    //apk下载完成后 调用系统的安装方法                    Intent intent = new Intent(Intent.ACTION_VIEW);                    intent.setDataAndType(Uri.fromFile(file), "application/vnd.android.package-archive");                    context.startActivity(intent);                } catch (IOException e) {                    e.printStackTrace();                } finally {                    if (is != null) is.close();                    if (fos != null) fos.close();                }            }        });    }    public static String isExistDir(String saveDir) throws IOException {        // 下载位置        if (Environment.getExternalStorageState().equals(Environment.MEDIA_MOUNTED)) {            File downloadFile = new File(Environment.getExternalStorageDirectory(), saveDir);            if (!downloadFile.mkdirs()) {                downloadFile.createNewFile();            }            String savePath = downloadFile.getAbsolutePath();            Log.e("savePath", savePath);            return savePath;        }        return null;    }    private static String getNameFromUrl(String url) {        return url.substring(url.lastIndexOf("/") + 1);    }}

activity_main.xml

<?xml version="1.0" encoding="utf-8"?><android.support.constraint.ConstraintLayout xmlns:android="http://schemas.android.com/apk/res/android"    xmlns:app="http://schemas.android.com/apk/res-auto"    xmlns:tools="http://schemas.android.com/tools"    android:layout_width="match_parent"    android:layout_height="match_parent">    <android.support.v7.widget.RecyclerView        android:id="@+id/rv"        android:layout_width="match_parent"        android:layout_height="match_parent"        >    </android.support.v7.widget.RecyclerView></android.support.constraint.ConstraintLayout>

item.xml

<?xml version="1.0" encoding="utf-8"?><RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"    android:layout_width="match_parent"    android:layout_height="match_parent"    xmlns:fresco="http://schemas.android.com/apk/res-auto">    <com.facebook.drawee.view.SimpleDraweeView        android:id="@+id/img"        android:layout_width="100dp"        android:layout_height="100dp"        android:layout_alignParentLeft="true"        android:layout_alignParentStart="true"        android:layout_alignParentTop="true"        android:layout_marginLeft="20dp"        android:layout_marginStart="20dp"        fresco:placeholderImage="@mipmap/ic_launcher"        fresco:roundAsCircle="true" />    <TextView        android:id="@+id/tv1"        android:layout_width="wrap_content"        android:layout_height="wrap_content"        android:layout_alignLeft="@+id/tv2"        android:layout_alignParentTop="true"        android:layout_alignStart="@+id/tv2"        android:layout_marginTop="15dp"        android:text="26565465465446"        android:textColor="#ccc"        android:textSize="25dp" />    <TextView        android:id="@+id/tv2"        android:layout_width="wrap_content"        android:layout_height="wrap_content"        android:layout_below="@+id/tv1"        android:layout_marginLeft="31dp"        android:layout_marginStart="31dp"        android:layout_marginTop="14dp"        android:layout_toEndOf="@+id/img"        android:layout_toRightOf="@+id/img"        android:text="7896546545646"        android:textColor="#f00" />    <TextView        android:layout_width="match_parent"        android:layout_height="2dp"        android:layout_alignBottom="@+id/img"        android:layout_alignParentLeft="true"        android:layout_alignParentStart="true"        android:background="@drawable/fengexian" /></RelativeLayout>

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