Android - 框架之Retrofit+RxJava的使用

Posted 2020-08-24 ITGungnir

前几天分别对Retrofit和RxJava进行了总结，这个帖子打算把Retrofit结合RxJava使用的方法总结以下。有还不了解Retrofit或RxJava的朋友可以参考下面的帖子学习~

【Android - 框架】之Retrofit的使用

【Android - 框架】之RxJava的使用

 

首先导入依赖：

dependencies {
    compile fileTree(include: [‘*.jar‘], dir: ‘libs‘)
    androidTestCompile(‘com.android.support.test.espresso:espresso-core:2.2.2‘, {
        exclude group: ‘com.android.support‘, module: ‘support-annotations‘
    })
    compile ‘com.android.support:appcompat-v7:24.2.1‘
    testCompile ‘junit:junit:4.12‘
    compile ‘com.squareup.retrofit2:retrofit:2.1.0‘
    compile ‘com.squareup.retrofit2:converter-gson:2.1.0‘
    compile ‘com.squareup.retrofit2:adapter-rxjava:2.1.0‘
    compile ‘io.reactivex:rxjava:1.2.2‘
    compile ‘io.reactivex:rxandroid:1.2.1‘
}

然后添加权限：

<uses-permission android:name="android.permission.INTERNET" />

在贴出代码之前先声明一下，这个帖子里面用到的案例和Retrofit的帖子中用到的案例是同一个。

 

代码：

两者结合的代码（未封装）：

        Retrofit retrofit = new Retrofit.Builder()
                .baseUrl(SharedData.BASE_URL)
                .addConverterFactory(GsonConverterFactory.create())
                .addCallAdapterFactory(RxJavaCallAdapterFactory.create())
                .build();

        RetrofitService service = retrofit.create(RetrofitService.class);

        Observable<InfoData> observable = service.getInfoData();

        observable
                .subscribeOn(Schedulers.io())
                .observeOn(AndroidSchedulers.mainThread())
                .subscribe(new Subscriber<InfoData>() {
                    @Override
                    public void onCompleted() {
                    }

                    @Override
                    public void onError(Throwable e) {
                    }

                    @Override
                    public void onNext(InfoData infoData) {
                        Toast.makeText(MainActivity.this, infoData.getName(), Toast.LENGTH_SHORT).show();
                    }
                });

两者结合的代码（封装）：

封装好的工具类：

import com.example.itgungnir.testretrofit_rxjava.share.SharedData;

import retrofit2.Retrofit;
import retrofit2.adapter.rxjava.RxJavaCallAdapterFactory;
import retrofit2.converter.gson.GsonConverterFactory;
import rx.Observable;
import rx.Subscriber;
import rx.android.schedulers.AndroidSchedulers;
import rx.schedulers.Schedulers;

/**
 * 网络访问的工具类
 */
public class HttpUtil {
    private static HttpUtil instance;

    private Retrofit retrofit;

    private HttpUtil() {
        this.instance = this;
        this.retrofit = new Retrofit.Builder()
                .baseUrl(SharedData.BASE_URL)
                .addConverterFactory(GsonConverterFactory.create())
                .addCallAdapterFactory(RxJavaCallAdapterFactory.create())
                .build();
    }

    private static HttpUtil getInstance() {
        if (instance == null) {
            synchronized (HttpUtil.class) {
                if (instance == null) {
                    return new HttpUtil();
                }
            }
        }
        return instance;
    }

    public static <T> T getService(Class<T> c) {
        return getInstance().retrofit.create(c);
    }

    public static <T> void init(Observable<T> observable, Subscriber<T> subscriber) {
        observable
                .subscribeOn(Schedulers.io())
                .observeOn(AndroidSchedulers.mainThread())
                .subscribe(subscriber);
    }
}

 

在主线程中调用工具类：

public class MainActivity extends AppCompatActivity {

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);

        HttpUtil.init(HttpUtil.getService(RetrofitService.class).getInfoData(), new Subscriber<InfoData>() {
            @Override
            public void onCompleted() {
            }

            @Override
            public void onError(Throwable e) {
            }

            @Override
            public void onNext(InfoData infoData) {
                Toast.makeText(MainActivity.this, infoData.getName(), Toast.LENGTH_SHORT).show();
            }
        });
    }
}

运行结果：