上篇文章介绍了Retrofit的简单使用，但是我们可以结合RxJava和OkHttp进一步封装，可以更便捷的使用。
下面我们一步一步来实现封装吧。
添加依赖
用到的包比较多，所以要添加的依赖也不少。
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 'io.reactivex:rxjava:1.1.2'
compile 'com.squareup.okhttp3:okhttp:3.2.0'
//logger
compile 'com.orhanobut:logger:1.11'
//retrofit 打印异常
compile 'com.squareup.okhttp3:logging-interceptor:3.0.1'
由于使用了Lambda，需要启用 Java 8 语言功能和 Jack，请在模块层级的 build.gradle 文件的defaultConfig下输入以下内容：
jackOptions {
enabled true
}
compileOptions {
sourceCompatibility JavaVersion.VERSION_1_8
targetCompatibility JavaVersion.VERSION_1_8
}
创建API接口
public interface APIClient {
@GET("repos/square/retrofit/contributors")
Observable<List<ObjectEntity>> contributorsBySimpleGetCall();
}
封装方法
public class NetRequest {
public final static String TEMP_UPLOAD_IMAGE_PREFIX = "tmp";
public final static int IMAGE_SIZE_THRESHOLD = 400 * 1024;//400K
public final static String BASE_URL = "https://api.github.com";
public final static String LINE_UP_URL = "https://api.github.com/";
public final static String AFFAIR_URL = "https://api.github.com/";
public static APIClient APIInstance;
public static APIClient APIInstance2;
public static Cache cache;
static {
try {
cache = new Cache(MyApplication.context.getCacheDir(), 1 * 1024 * 1024);
} catch (Exception e) {
e.printStackTrace();
}
HttpLoggingInterceptor interceptor = new HttpLoggingInterceptor();
interceptor.setLevel(HttpLoggingInterceptor.Level.BODY);
OkHttpClient okHttpClient = new OkHttpClient().newBuilder()
.cache(cache)
.connectTimeout(40, TimeUnit.SECONDS)
.addInterceptor(interceptor).build();
Retrofit.Builder builder = new Retrofit.Builder()
.client(okHttpClient)
.addCallAdapterFactory(RxJavaCallAdapterFactory.createWithScheduler(Schedulers.io()))
.addConverterFactory(GsonConverterFactory.create());
APIInstance = builder.baseUrl(BASE_URL).build().create(APIClient.class);
APIInstance2 = builder.baseUrl(AFFAIR_URL).build().create(APIClient.class);
}
}
ObjectEntity实体类
public class ObjectEntity implements Serializable {
private String login;
private int id;
private String avatar_url;
private String gravatar_id;
private String url;
private String html_url;
private String followers_url;
private String following_url;
private String gists_url;
private String starred_url;
private String subscriptions_url;
private String organizations_url;
private String repos_url;
private String events_url;
private String received_events_url;
private String type;
private boolean site_admin;
private int contributions;
public String getLogin() {
return login;
}
public void setLogin(String login) {
this.login = login;
}
public int getId() {
return id;
}
public void setId(int id) {
this.id = id;
}
public String getAvatar_url() {
return avatar_url;
}
public void setAvatar_url(String avatar_url) {
this.avatar_url = avatar_url;
}
public String getGravatar_id() {
return gravatar_id;
}
public void setGravatar_id(String gravatar_id) {
this.gravatar_id = gravatar_id;
}
public String getUrl() {
return url;
}
public void setUrl(String url) {
this.url = url;
}
public String getHtml_url() {
return html_url;
}
public void setHtml_url(String html_url) {
this.html_url = html_url;
}
public String getFollowers_url() {
return followers_url;
}
public void setFollowers_url(String followers_url) {
this.followers_url = followers_url;
}
public String getFollowing_url() {
return following_url;
}
public void setFollowing_url(String following_url) {
this.following_url = following_url;
}
public String getGists_url() {
return gists_url;
}
public void setGists_url(String gists_url) {
this.gists_url = gists_url;
}
public String getStarred_url() {
return starred_url;
}
public void setStarred_url(String starred_url) {
this.starred_url = starred_url;
}
public String getSubscriptions_url() {
return subscriptions_url;
}
public void setSubscriptions_url(String subscriptions_url) {
this.subscriptions_url = subscriptions_url;
}
public String getOrganizations_url() {
return organizations_url;
}
public void setOrganizations_url(String organizations_url) {
this.organizations_url = organizations_url;
}
public String getRepos_url() {
return repos_url;
}
public void setRepos_url(String repos_url) {
this.repos_url = repos_url;
}
public String getEvents_url() {
return events_url;
}
public void setEvents_url(String events_url) {
this.events_url = events_url;
}
public String getReceived_events_url() {
return received_events_url;
}
public void setReceived_events_url(String received_events_url) {
this.received_events_url = received_events_url;
}
public String getType() {
return type;
}
public void setType(String type) {
this.type = type;
}
public boolean isSite_admin() {
return site_admin;
}
public void setSite_admin(boolean site_admin) {
this.site_admin = site_admin;
}
public int getContributions() {
return contributions;
}
public void setContributions(int contributions) {
this.contributions = contributions;
}
}
接口调用
public void getData() {
NetRequest.APIInstance2.contributorsBySimpleGetCall()
.observeOn(AndroidSchedulers.mainThread())
.subscribe(results -> {
Log.d("test","result size="+results.size());
}, throwable -> {
if (throwable instanceof HttpException) {
Toast.makeText(MainActivity.this,"网络连接异常",Toast.LENGTH_SHORT).show();
} else {
Toast.makeText(MainActivity.this,"验证失败",Toast.LENGTH_SHORT).show();
}
});
}
效果图
效果图
源码地址
总结
有了这样一个封装好的方法，我们在以后的项目中就可以很轻松地进行HTTP请求，也不必担心JSON解析的问题
