RequestInterceptor 请求拦截器
RequestInterceptor requestInterceptor = new RequestInterceptor() { @Override public void intercept(RequestFacade request) { request.addHeader("User-Agent", "Retrofit-Sample-App"); } };
RestAdapter restAdapter = new RestAdapter.Builder()
.setEndpoint("https://api.github.com")
.setRequestInterceptor(requestInterceptor)
.build();
class MyErrorHandler implements ErrorHandler { @Override public Throwable handleError(RetrofitError cause) { Response r = cause.getResponse(); if (r != null && r.getStatus() == 401) { return new UnauthorizedException(cause); } return cause; //返回值不能是null,否则运行是会出现异常. } }
RestAdapter restAdapter = new RestAdapter.Builder()
.setEndpoint("https://api.github.com")
.setErrorHandler(new MyErrorHandler())
.build();
RestAdapter restAdapter = new RestAdapter.Builder()
.setLogLevel(RestAdapter.LogLevel.FULL)
.setEndpoint("https://api.github.com")
.build();
不同于拦截器或者ErrorHandler,可以在RestAdapter生命周期的任何时候通过setLogLevel()添加或者更改logging level.
public class JacksonConverter implements Converter {
// Constructor
...
@Override
public Object fromBody(TypedInput body, Type type) throws ConversionException {
JavaType javaType = objectMapper.getTypeFactory().constructType(type);
try {
return objectMapper.readValue(body.in(), javaType);
}
catch (IOException e) {
throw new ConversionException(e);
}
}
@Override
public TypedOutput toBody(Object object) {
try {
String charset = "UTF-8";
return new JsonTypedOutput(objectMapper.writeValueAsString(object).getBytes(charset), charset);
}
catch (IOException e) {
throw new AssertionError(e);
}
}
...
// JsonTypedOutput implementation
}
private static class JsonTypedOutput implements TypedOutput {
private final byte[] jsonBytes;
private final String mimeType;
JsonTypedOutput(byte[] jsonBytes, String encode) {
this.jsonBytes = jsonBytes;
this.mimeType = "application/json; charset=" + encode;
}
@Override public String fileName() {
return null;
}
@Override public String mimeType() {
return mimeType;
}
@Override public long length() {
return jsonBytes.length;
}
@Override public void writeTo(OutputStream out) throws IOException {
out.write(jsonBytes);
}
}
原文：http://www.cnblogs.com/laiqurufeng/p/4484916.html