uri参数

https://api.flickr.com/services/rest/

private static final String ENDPOINT = "https://api.flickr.com/services/rest/";

private static final String KEY_METHOD = "method";
private static final String KEY_API_KEY = "api_key";
private static final String KEY_FORMAT = "format";
private static final String KEY_NO_JSON_CALLBACK = "nojsoncallback";
private static final String KEY_PARAM_EXTRAS = "extras";
private static final String KEY_PARAM_TEXT = "text";

private static final String VALUE_METHOD_GET_RECENT = "flickr.photos.getRecent";
private static final String VALUE_METHOD_SEARCH = "flickr.photos.search";
private static final String VALUE_FORMAT_JSON = "json";
private static final String VALUE_PARAM_EXTRA_SMALL_URL = "url_s";

private static final int ID_API_KEY = R.string.api_key;

/**

https://api.flickr.com/services/rest/?

method=flickr.photos.getRecent
&api_key=xxx
&format=json
&nojsoncalllback=1
*/

String url = Uri. parse( ENDPOINT).buildUpon() .appendQueryParameter( KEY_METHOD , VALUE_METHOD_GET_RECENT) .appendQueryParameter( KEY_API_KEY , api_key) .appendQueryParameter( KEY_FORMAT , VALUE_FORMAT_JSON) .appendQueryParameter( KEY_NO_JSON_CALLBACK , "1") .appendQueryParameter( KEY_PARAM_EXTRAS , VALUE_PARAM_EXTRA_SMALL_URL) .build().toString() ;