1. AsyncHttpClient, RequestParams ,AsyncHttpResponseHandler三个类使用方法
(1)AsyncHttpClient
public class AsyncHttpClient extends java.lang.Object
该类通常用在android应用程序中创建异步GET, POST, PUT和DELETE HTTP请求,请求参数通过RequestParams实例创建,响应通过重写匿名内部类 ResponseHandlerInterface的方法处理。
例子:
AsyncHttpClient client = new AsyncHttpClient();
client.get("http://www.baidu.com", new ResponseHandlerInterface() {
@Override
public void onSuccess(String response) {
System.out.println(response);
}
});
(2)RequestParams
public class RequestParams extends java.lang.Object
用于创建AsyncHttpClient实例中的请求参数(包括字符串或者文件)的集合
例子:
RequestParams params = new RequestParams();
params.put("username", "tom");
params.put("password", "111111");
params.put("email", "my@email.com");
params.put("file", new File("test.txt")); // Upload a File
Map<String, String> map = new HashMap<String, String>();
map.put("first_name", "James");
map.put("last_name", "Smith");
params.put("user", map); // url params: "user[first_name]=James&user[last_name]=Smith"
Set<String> set = new HashSet<String>(); // unordered collection
set.add("music");
set.add("art");
params.put("like", set); // url params: "like=music&like=art"
List<String> list = new ArrayList<String>(); // Ordered collection
list.add("Java");
list.add("C");
params.put("languages", list); // url params: "languages[]=Java&languages[]=C"
String[] colors = { "blue", "yellow" }; // Ordered collection
params.put("colors", colors); // url params: "colors[]=blue&colors[]=yellow"
List<Map<String, String>> listOfMaps = new ArrayList<Map<String, String>>();
Map<String, String> user1 = new HashMap<String, String>();
user1.put("age", "30");
user1.put("gender", "male");
Map<String, String> user2 = new HashMap<String, String>();
user2.put("age", "25");
user2.put("gender", "female");
listOfMaps.add(user1);
listOfMaps.add(user2);
params.put("users", listOfMaps); // url params: "users[][age]=30&users[][gender]=male&users[][age]=25&users[][gender]=female"
AsyncHttpClient client = new AsyncHttpClient();
client.post("http://myendpoint.com", params, responseHandler);
(3)public class AsyncHttpResponseHandler extends java.lang.Object implements ResponseHandlerInterface
用于拦截和处理由AsyncHttpClient创建的请求。在匿名类AsyncHttpResponseHandler中的重写 onSuccess(int, org.apache.http.Header[], byte[])方法用于处理响应成功的请求。此外,你也可以重写 onFailure(int, org.apache.http.Header[], byte[], Throwable), onStart(), onFinish(), onRetry() 和onProgress(int, int)方法
例子:
AsyncHttpClient client = new AsyncHttpClient();
client.get("http://www.google.com", new AsyncHttpResponseHandler() {
@Override
public void onStart() {
// Initiated the request
}
@Override
public void onSuccess(int statusCode, Header[] headers, byte[] responseBody) {
// Successfully got a response
}
@Override
public void onFailure(int statusCode, Header[] headers, byte[] responseBody, Throwable error)
{
// Response failed :(
}
@Override
public void onRetry() {
// Request was retried
}
@Override
public void onProgress(int bytesWritten, int totalSize) {
// Progress notification
}
@Override
public void onFinish() {
// Completed the request (either success or failure)
}
});
2.利用RequestParams上传文件
类RequestParams支持multipart file 文件上传
(1)添加文件对象用于上传
File myFile = new File("/path/to/file.png");
RequestParams params = new RequestParams();
try {
params.put("profile_picture", myFile);
} catch(FileNotFoundException e) {}
(2)添加字节数组用于上传(字节转化见上一片)
byte[] myByteArray = bytes;
RequestParams params = new RequestParams();
params.put("file", new ByteArrayInputStream(myByteArray), "text.txt");
来源:oschina
链接:https://my.oschina.net/u/1471093/blog/341811