用RXJava,java8,Retrofit,RecyclerView显示

最新推荐文章于 2021-05-28 21:21:53 发布

zhao__na

最新推荐文章于 2021-05-28 21:21:53 发布

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本文链接：https://blog.youkuaiyun.com/zhao__na/article/details/78441128

本文介绍如何使用Retrofit框架结合RxJava进行高效、简洁的网络数据交互。通过示例展示了配置依赖、设置Java版本、添加网络权限等步骤，并提供了MainActivity中具体的网络请求实现代码。

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依赖
compile 'com.squareup.retrofit2:retrofit:2.0.1'
compile 'com.squareup.retrofit2:converter-gson:2.0.1'
compile 'com.squareup.retrofit2:adapter-rxjava:2.0.1'
compile 'io.reactivex:rxandroid:1.1.0'
compile 'com.squareup.okhttp3:logging-interceptor:3.4.1'
compile 'com.android.support:recyclerview-v7:26.+'

java8要在android里加
android {
    compileSdkVersion 26
    buildToolsVersion "26.0.2"
    defaultConfig {
        applicationId "com.example.lx_20171103"
        minSdkVersion 15
        targetSdkVersion 26
        versionCode 1
        versionName "1.0"
        testInstrumentationRunner "android.support.test.runner.AndroidJUnitRunner"
        jackOptions {
            enabled true
        }
    }
    buildTypes {
        release {
            minifyEnabled false
            proguardFiles getDefaultProguardFile('proguard-android.txt'), 'proguard-rules.pro'
        }
    }
    compileOptions{
        //设置JDK1.8
        sourceCompatibility JavaVersion.VERSION_1_8
        targetCompatibility JavaVersion.VERSION_1_8

    }
}


一定要加网络权限
<uses-permission android:name="android.permission.INTERNET"></uses-permission>

Api类
public class Api {
    public static  final  String BASE_PATH = "http://m.yunifang.com/";
//    public static final String BASE_URL = "https://api.github.com/";
//    public static final String HOME_URL="http://api.expoon.com/AppNews/getNewsList/";


}

ApiService
public interface ApiService {
    /**
     * 结合Retrofit+RxJava
     * http://service.meiyinkeqiu.com/service/ads/cptj
     * @param
     * @return
     */
    @GET("yunifang/mobile/home")
    rx.Observable<News> getNoParams();



}



News类是一个Bean类

MainActivity主页面

public class MainActivity extends AppCompatActivity {

    private RecyclerView recycler;
    private TextView mtv;
    private ApiService apiService;

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);
//        mtv = (TextView) findViewById(R.id.tv);
        recycler = (RecyclerView) findViewById(R.id.recycler);
        LinearLayoutManager linearLayoutManager=new LinearLayoutManager(MainActivity.this);
        recycler.setLayoutManager(linearLayoutManager);
        getNoParams();
    }

    private void getNoParams() {
        //创建Retrofit
        Retrofit retrofit = new Retrofit.Builder().baseUrl(Api.BASE_PATH).addConverterFactory(GsonConverterFactory.create()).addCallAdapterFactory(RxJavaCallAdapterFactory.create()).build();
        //通过动态代理得到网络接口对象

        apiService = retrofit.create(ApiService.class);

        //得到Observable
        Observable<News> observable = apiService.getNoParams();//获取数据源
        Subscription subscribe = observable.subscribeOn(Schedulers.io())//IO线程做耗时操作
                .observeOn(AndroidSchedulers.mainThread())//在主线程更新UI
                .subscribe(new Observer<News>() {
                    //完成
                    @Override
                    public void onCompleted() {
                        Toast.makeText(MainActivity.this, "onCompleted", Toast.LENGTH_LONG).show();
                        Log.d("MainActivity", "onCompleted: ");
                    }

                    //异常
                    @Override
                    public void onError(Throwable e) {
                        Log.d("MainActivity", "onError: " + e.getMessage());
                    }

                    // 加载中
                    @Override
                    public void onNext(News news) {
                        Log.d("MainActivity", "onNext: ");
                        List<News.DataBean.DefaultGoodsListBean> ads = news.data.defaultGoodsList;

                        Myadapter myadapter = new Myadapter(MainActivity.this, ads);
                        recycler.setAdapter(myadapter);
                    }
                });
    }
}


Myadapter 类

public class Myadapter extends RecyclerView.Adapter<Myadapter.ViewHolder> {
    private Context context;
    private List<News.DataBean.DefaultGoodsListBean> list;
    private final ImageLoader loader;

    public Myadapter(Context context, List<News.DataBean.DefaultGoodsListBean> list) {
        this.context = context;
        this.list = list;
        ImageLoaderConfiguration configuration=ImageLoaderConfiguration.createDefault(context);
        loader = ImageLoader.getInstance();
        loader.init(configuration);
    }

    @Override
    public Myadapter.ViewHolder onCreateViewHolder(ViewGroup parent, int viewType) {
        View view = LayoutInflater.from(context).inflate(R.layout.item, parent, false);
        return new ViewHolder(view);
    }

    @Override
    public void onBindViewHolder(Myadapter.ViewHolder holder, int position) {
      holder.name.setText(list.get(position).goods_name);
      loader.displayImage(list.get(position).goods_img,holder.img);
    }

    @Override
    public int getItemCount() {
        return list.size();
    }
    public class ViewHolder extends RecyclerView.ViewHolder{
      public TextView name;
        public ImageView img;
        public ViewHolder(View itemView) {
            super(itemView);
            name=itemView.findViewById(R.id.good_name);
            img=itemView.findViewById(R.id.img);
        }
    }
}


//主页面布局
<android.support.v7.widget.RecyclerView
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    android:id="@+id/recycler"></android.support.v7.widget.RecyclerView>


//adapter类布局
<TextView
    android:layout_width="match_parent"
    android:layout_height="wrap_content"
    android:id="@+id/good_name"
    />
  <ImageView
      android:layout_width="match_parent"
      android:layout_height="200dp"
      android:id="@+id/img"/>