Android HttpURLConnection实现http网络编程

1、在AndroidManifest.xml中添加网络访问权限。

<uses-permission android:name="android.permission.INTERNET"></uses-permission>

2、封装HttpURLConnection，以下是GET，POST的方式http网络操作。

package freelancer.ccmanager.http;

import java.io.BufferedReader;
import java.io.DataOutputStream;
import java.io.IOException;
import java.io.InputStream;
import java.io.InputStreamReader;
import java.net.HttpURLConnection;
import java.net.URL;

import freelancer.ccmanager.FDefine;

/**
 * .---..---. .---..---..-.   .---..-..-..---..---..---.
 * | |- | |-< | |- | |- | |__ | | || .` || |  | |- | |-<
 * `-'  `-'`-'`---'`---'`----'`-^-'`-'`-'`---'`---'`-'`-'
 * Author：freelancer on 15-8-6 14:53
 * <p/>
 * e-mail：jiangbing9293@foxmail.com
 */
public class FHttp implements FDefine{

    URL url;
    HttpURLConnection conn = null;

    static FHttp http;

    public FHttp() {

    }

    public static FHttp getInstance(){
        if (http == null)
            http = new FHttp();
        return http;
    }

    public String doGet(String path, String param){
        String getUrl = CC_SERVER +path+ "?"+param;
        try {
            url = new URL(getUrl);
            conn = (HttpURLConnection)url.openConnection();
            InputStream is = conn.getInputStream();
            BufferedReader br = new BufferedReader(new InputStreamReader(is));
            String response = "";
            String readLine = null;
            while((readLine =br.readLine()) != null){
                response = response + readLine;
            }
            is.close();
            br.close();
            conn.disconnect();
            return response;
        }  catch (IOException e) {
            e.printStackTrace();
            return null;
        }
    }

    public String doPost(String path, String params){
        try {
            url = new URL(CC_SERVER+path);
            conn = (HttpURLConnection)url.openConnection();
            conn.setDoInput(true);
            conn.setDoOutput(true);
            conn.setRequestMethod("POST");
            conn.setUseCaches(false);
            conn.setInstanceFollowRedirects(false);
            conn.setRequestProperty("Content-Type", "application/x-www-form-urlencoded");
            conn.connect();

            DataOutputStream out = new DataOutputStream(conn.getOutputStream());

            out.writeBytes(params);
            out.flush();
            out.close();

            InputStream is = conn.getInputStream();
            BufferedReader br = new BufferedReader(new InputStreamReader(is));
            String response = "";
            String readLine = null;
            while((readLine =br.readLine()) != null){
                response = response + readLine;
            }
            is.close();
            br.close();
            conn.disconnect();
            return response;
        } catch (IOException e) {
            e.printStackTrace();
            return null;
        }
    }
}