android okhttp例子

package com.test.okhttp;

import java.io.File;
import java.io.FileOutputStream;
import java.io.IOException;
import java.io.InputStream;
import java.util.List;
import java.util.concurrent.TimeUnit;

import org.apache.http.client.utils.URLEncodedUtils;
import org.apache.http.message.BasicNameValuePair;

import com.squareup.okhttp.Call;
import com.squareup.okhttp.Callback;
import com.squareup.okhttp.OkHttpClient;
import com.squareup.okhttp.Request;
import com.squareup.okhttp.Response;

public class OkHttpClientManager {

	private static final OkHttpClient mOkHttpClient = new OkHttpClient();

	static {

		mOkHttpClient.setConnectTimeout(30, TimeUnit.SECONDS);

	}

	/**
	 * 
	 * 该不会开启异步线程。
	 * 
	 * @param request
	 * 
	 * @return
	 * 
	 * @throws IOException
	 */

	public static Response execute(Request request) throws IOException {

		return mOkHttpClient.newCall(request).execute();

	}

	/**
	 * 
	 * 开启异步线程访问网络
	 * 
	 * @param request
	 * 
	 * @param responseCallback
	 */

	public static void enqueue(Request request, Callback responseCallback) {

		mOkHttpClient.newCall(request).enqueue(responseCallback);

	}

	/**
	 * 
	 * 开启异步线程访问网络, 且不在意返回结果（实现空callback）
	 * 
	 * @param request
	 */

	public static void enqueue(Request request) {

		mOkHttpClient.newCall(request).enqueue(new Callback() {

			@Override
			public void onResponse(Response arg0) throws IOException {

			}

			@Override
			public void onFailure(Request arg0, IOException arg1) {

			}

		});

	}

	public static String getStringFromServer(String url) throws IOException {

		Request request = new Request.Builder().url(url).build();

		Response response = execute(request);

		if (response.isSuccessful()) {

			String responseUrl = response.body().string();

			return responseUrl;

		} else {

			throw new IOException("Unexpected code " + response);

		}

	}

	private static final String CHARSET_NAME = "UTF-8";

	/**
	 * 
	 * 这里使用了HttpClinet的API。只是为了方便
	 * 
	 * @param params
	 * 
	 * @return
	 */

	public static String formatParams(List<BasicNameValuePair> params) {

		return URLEncodedUtils.format(params, CHARSET_NAME);
	}

	/**
	 * 
	 * 为HttpGet 的 url 方便的添加多个name value 参数。
	 * 
	 * @param url
	 * 
	 * @param params
	 * 
	 * @return
	 */

	public static String attachHttpGetParams(String url,
			List<BasicNameValuePair> params) {
		return url + "?" + formatParams(params);
	}

	/**
	 * 
	 * 为HttpGet 的 url 方便的添加1个name value 参数。
	 * 
	 * @param url
	 * 
	 * @param name
	 * 
	 * @param value
	 * 
	 * @return
	 */

	public static String attachHttpGetParam(String url, String name,
			String value) {
		return url + "?" + name + "=" + value;
	}
	/**
	 * 下载内容
	 * @param url
	 * @param destFileDir
	 */
	public static void downloadAsyn(final String url, final String destFileDir) {
		final Request request = new Request.Builder().url(url).build();
		final Call call = mOkHttpClient.newCall(request);
		call.enqueue(new Callback() {
			@Override
			public void onFailure(final Request request, final IOException e) {

			}

			@Override
			public void onResponse(Response response) {
				System.out.println("Download..........");
				InputStream is = null;
				byte[] buf = new byte[2048];
				int len = 0;
				FileOutputStream fos = null;
				try {
					is = response.body().byteStream();
					File file = new File(destFileDir, getFileName(url));
					fos = new FileOutputStream(file);
					while ((len = is.read(buf)) != -1) {
						fos.write(buf, 0, len);
					}
					fos.flush();
				} catch (IOException e) {
				} finally {
					try {
						if (is != null)
							is.close();
					} catch (IOException e) {
					}
					try {
						if (fos != null)
							fos.close();
					} catch (IOException e) {
					}
				}

			}
		});
	}

	private static String getFileName(String path) {
		int separatorIndex = path.lastIndexOf("/");
		return (separatorIndex < 0) ? path : path.substring(separatorIndex + 1,
				path.length());
	}
}

参考： http://blog.csdn.net/lmj623565791/article/details/47911083