Android app开发中Retrofit框架的初步上手使用

2019-12-10 19:05:41王振洲

RestAdapter

RestAdapter restAdapter = new RestAdapter.Builder()
  .setEndpoint("https://www.easck.com/pre>
	
	


 

setEndPoint就不说了,接口中定义的都是相对Url,EndPoint就是域名,build方法调用ensureSaneDefaults()方法,然后就构造了一个RestAdapter对象,构造函数的参数中传入了EndPoint外的几个对象,这几个对象就是在ensureSaneDefaults()中初始化的。

private void ensureSaneDefaults() {
 if (converter == null) { converter = Platform.get().defaultConverter(); }
 if (clientProvider == null) { clientProvider = Platform.get().defaultClient(); }
 if (httpExecutor == null) { httpExecutor = Platform.get().defaultHttpExecutor(); }
 if (callbackExecutor == null) { callbackExecutor = Platform.get().defaultCallbackExecutor(); }
 if (errorHandler == null) { errorHandler = ErrorHandler.DEFAULT; }
 if (log == null) { log = Platform.get().defaultLog(); }
 if (requestInterceptor == null) { requestInterceptor = RequestInterceptor.NONE; }
}

ensureSaneDefaults()中初始化了很多成员,errorHandler、log就不看了,其他的除了requestInterceptor都是通过Platform对象获得的,所以要先看下Platform

Platform

private static final Platform PLATFORM = findPlatform();
 static final boolean HAS_RX_JAVA = hasRxJavaOnClasspath();

 static Platform get() {
  return PLATFORM;
 }

 private static Platform findPlatform() {
  try {
   Class.forName("android.os.Build");
   if (Build.VERSION.SDK_INT != 0) {
    return new Android();
   }
  } catch (ClassNotFoundException ignored) {
  }

  if (System.getProperty("com.google.appengine.runtime.version") != null) {
   return new AppEngine();
  }

  return new Base();
 }