Android的网络编程大家基本都熟悉，Http的Get，Post请求与其他语言的开发大同小异，可以采用Android自带的网络开发包，也可以采用Apache的开源网络编程包。本文介绍一个支持SPDY的开发包OkHttp，关于SPDY的知识，大家可以从维基百科和百度百科上面找到，基本就是增强版的Http。
OkHttp is an HTTP client that’s efficient by default:
- SPDY support allows all requests to the same host to share a socket.
- Connection pooling reduces request latency (if SPDY isn’t available).
- Transparent GZIP shrinks download sizes.
- Response caching avoids the network completely for repeat requests.
示例代码
GET A URL
This program downloads a URL and print its contents as a string. Full source.
1 2 3 4 5 6 7 8 9 10 11 12 13 14 | OkHttpClient client = new OkHttpClient(); String get(URL url) throws IOException { HttpURLConnection connection = client.open(url); InputStream in = null; try { // Read the response. in = connection.getInputStream(); byte[] response = readFully(in); return new String(response, "UTF-8"); } finally { if (in != null) in.close(); } } |
OkHttpClient client = new OkHttpClient();
String get(URL url) throws IOException {
HttpURLConnection connection = client.open(url);
InputStream in = null;
try {
// Read the response.
in = connection.getInputStream();
byte[] response = readFully(in);
return new String(response, "UTF-8");
} finally {
if (in != null) in.close();
}
}POST TO A SERVER
This program posts data to a service. Full source.
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 | OkHttpClient client = new OkHttpClient(); String post(URL url, byte[] body) throws IOException { HttpURLConnection connection = client.open(url); OutputStream out = null; InputStream in = null; try { // Write the request. connection.setRequestMethod("POST"); out = connection.getOutputStream(); out.write(body); out.close(); // Read the response. if (connection.getResponseCode() != HttpURLConnection.HTTP_OK) { throw new IOException("Unexpected HTTP response: " + connection.getResponseCode() + " " + connection.getResponseMessage()); } in = connection.getInputStream(); return readFirstLine(in); } finally { // Clean up. if (out != null) out.close(); if (in != null) in.close(); } } |
OkHttpClient client = new OkHttpClient();
String post(URL url, byte[] body) throws IOException {
HttpURLConnection connection = client.open(url);
OutputStream out = null;
InputStream in = null;
try {
// Write the request.
connection.setRequestMethod("POST");
out = connection.getOutputStream();
out.write(body);
out.close();
// Read the response.
if (connection.getResponseCode() != HttpURLConnection.HTTP_OK) {
throw new IOException("Unexpected HTTP response: "
+ connection.getResponseCode() + " " + connection.getResponseMessage());
}
in = connection.getInputStream();
return readFirstLine(in);
} finally {
// Clean up.
if (out != null) out.close();
if (in != null) in.close();
}
}MAVEN 依赖库配置
<dependency> <groupId>com.squareup.okhttp</groupId> <artifactId>okhttp</artifactId> <version>1.2.0</version> </dependency>
