安卓端/course_mgmt_app/src/net/common/android/handler/RemoteDataHandler.java

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package net.common.android.handler;

import java.io.File;
import java.io.IOException;
import java.util.HashMap;
import java.util.concurrent.LinkedBlockingQueue;
import java.util.concurrent.ThreadPoolExecutor;
import java.util.concurrent.TimeUnit;

import net.common.android.common.HttpHelper;
import net.common.android.model.ResponseData;

import org.apache.http.HttpStatus;
import org.json.JSONArray;
import org.json.JSONException;
import org.json.JSONObject;

import android.os.Handler;
import android.os.Message;
import android.util.Log;


/**
 * 用于发送HTTP请求并处理响应返回的数据的Handler
 * 
 * @author hjgang
 */
public class RemoteDataHandler {
	public static final String TAG = "RemoteDataLoader";
	private static final String _CODE = "code";
	private static final String _DATAS = "datas";
	private static final String _HASMORE = "hasmore";
	private static final String _COUNT = "count";
	private static final String _RESULT = "result";
	private static final String _LOGIN = "login";
	private static final String _URL = "url";
	// 线程池
	// private ExecutorService pool = Executors.newCachedThreadPool();
	private static ThreadPoolExecutor threadPool = new ThreadPoolExecutor(6,
			30, 30L, TimeUnit.SECONDS, new LinkedBlockingQueue<Runnable>());

	private RemoteDataHandler() {
	}

	public interface Callback {
		/**
		 * HTTP响应完成的回调方法
		 * 
		 * @param data
		 *            响应返回的数据对象
		 */
		public void dataLoaded(ResponseData data);
	}

	public interface StringCallback {

		public void dataLoaded(String str);
	}

	/**