xUtils封裝http請求操作

轉自：http://www.gbtags.com/gb/mobileshare/4360.htm

import java.io.File;
import java.io.UnsupportedEncodingException;
import java.net.URLEncoder;
import java.text.DecimalFormat;

import android.app.ProgressDialog;
import android.content.Context;
import android.os.Handler;
import android.os.Message;
import android.widget.Button;

import com.lidroid.xutils.HttpUtils;
import com.lidroid.xutils.exception.HttpException;
import com.lidroid.xutils.http.RequestParams;
import com.lidroid.xutils.http.ResponseInfo;
import com.lidroid.xutils.http.callback.RequestCallBack;
import com.lidroid.xutils.http.client.HttpRequest;
import com.lidroid.xutils.util.PreferencesCookieStore;
import com.shyky.educ.R;
import com.shyky.educ.common.Configs;
import com.shyky.educ.common.Constants;
import com.shyky.educ.dialog.CommonAlertDialog;
import com.shyky.educ.dialog.CommonLoadingDialog;
import com.shyky.educ.view.CommonToast;

/**
 * 快速開發框架XUtils幫助類，此類封裝了該框架的各種操作
 * 
 * @author Shyky
 * @date 2014-11-19
 */
public class XUtilsHelper {

	private Context context;
	private Handler handler;
	private String url;
	/**
	 * 返回文本的編碼， 默認編碼UTF-8
	 */
	private HttpUtils httpUtils;
	private CommonLoadingDialog loadingDialog;
	private CommonAlertDialog alertDialog;
	private ProgressDialog progressDialog;
	/**
	 * 請求參數，默認編碼UTF-8
	 */
	private RequestParams params;
	private String filename;

	/**
	 * 構造方法
	 * 
	 * @param context
	 *            用於程序上下文，必須用當前Activity的this對象，否則報錯
	 * @param url
	 *            網絡資源地址
	 * @param handler
	 *            消息處理對象，用於請求完成後的怎麼處理返回的結果數據
	 */
	public XUtilsHelper(Context context, String url, Handler handler) {
		this.context = context;
		try {
			// 保存網絡資源文件名，要在轉碼之前保存，否則是亂碼
			filename = url.substring(url.lastIndexOf("/") + 1, url.length());
			// 解決中文亂碼問題，地址中有中文字符造成亂碼問題
			String old_url = URLEncoder.encode(url, "GBK");
			// 替換地址中的特殊字符
			String new_url = old_url.replace("%3A", ":").replace("%2F", "/")
					.replace("%3F", "?").replace("%3D", "=")
					.replace("%26", "&").replace("%2C", ",")
					.replace("%20", " ").replace("+", "%20")
					.replace("%2B", "+").replace("%23", "#")
					.replace("#", "%23");
			this.url = new_url;
		} catch (UnsupportedEncodingException e) {
			e.printStackTrace();
		}
		this.httpUtils = XutilsHttpClient.getInstence(context);
		this.handler = handler;
		this.loadingDialog = new CommonLoadingDialog(context,
				R.layout.activity_input_loading);
		this.progressDialog = new ProgressDialog(context);
		this.alertDialog = new CommonAlertDialog(context);
		this.params = new RequestParams("GBK"); // 編碼與服務器端字符編碼一致爲gbk
	}

	public void sendGet() {
		httpUtils.send(HttpRequest.HttpMethod.GET, url,
				new RequestCallBack<String>() {

					@Override
					public void onFailure(HttpException arg0, String arg1) {

					}

					@Override
					public void onSuccess(ResponseInfo<String> arg0) {

					}
				});
	}

	/**
	 * POST請求時需要設置提交參數，解決了中文亂碼設置了字符編碼爲GBK
	 * 
	 * @param namevlues
	 *            提交參數/值字符串二維數組
	 */
	public void setRequestParams(String[][] namevlues) {
		for (int i = 0; i < namevlues.length; i++)
			params.addBodyParameter(namevlues[i][0], namevlues[i][1]);
	}

	/**
	 * POST方式請求服務器資源
	 * 
	 * @param dialogTitle
	 *            加載中對話框顯示標題文字
	 * @param dialogNotingTitle
	 *            提示對話框標題文字
	 */
	public void sendPost(final String dialogTitle,
			final String dialogNotingTitle) {

		if (dialogTitle != null) {
			loadingDialog.showDialog(dialogTitle, R.style.loading_dialog,
					R.anim.loading, false);
		}
		httpUtils.send(HttpRequest.HttpMethod.POST, url, params,
				new RequestCallBack<String>() {

					@Override
					public void onSuccess(ResponseInfo<String> arg0) {
						Message msg = Message.obtain();
						if (arg0.statusCode == 200) {
							// 無數據判斷
							if (Configs.HTTP_RESPONSE.trim().equals(
									arg0.result.trim())
									|| arg0.result.trim().startsWith(
											"<response totalRows='0'>".trim())
									|| arg0.result.trim().contains(
											"<items totalRows='0'>".trim())
									|| arg0.result.trim().contains(
											"<items totalRows='0'".trim())
									|| "<classes/>".trim().equals(
											arg0.result.trim())
									|| "<classes/>".trim().equals(
											arg0.result.trim())
									|| "[{\"totalRows\":0}]".trim().equals(
											arg0.result.trim())) {

								if (dialogTitle != null)
									loadingDialog.dismiss();
								// 需要判斷是否要顯示模式確認對話框
								if (dialogNotingTitle != null) {
									alertDialog
											.showConfirmDialog(
													dialogNotingTitle, "確認",
													null, null);
								}
								msg.obj = Constants.TAG_NOTHING;
							} else {
								if (dialogTitle != null)
									loadingDialog.dismiss();
								msg.obj = arg0.result;
							}
						} else {
							if (dialogTitle != null)
								loadingDialog.dismiss();
							msg.obj = Constants.TAG_FAILURE;
						}
						handler.sendMessage(msg);
					}

					@Override
					public void onFailure(HttpException arg0, String arg1) {
						if (dialogTitle != null)
							loadingDialog.dismiss();
						arg0.printStackTrace();
						Message msg = Message.obtain();
						msg.obj = Constants.TAG_FAILURE;
						handler.sendMessage(msg);
					}
				});
	}

	/**
	 * 上傳文件到服務器
	 * 
	 * @param param
	 *            提交參數名稱
	 * @param file
	 *            要上傳的文件對象
	 */
	public void uploadFile(String param, File file) {
		progressDialog.setTitle("上傳文件中，請稍等...");
		progressDialog.setCancelable(false);
		progressDialog.setCanceledOnTouchOutside(false);
		// 設置進度條風格，風格爲水平進度條
		progressDialog.setProgressStyle(ProgressDialog.STYLE_HORIZONTAL);
		params.addBodyParameter(param, file);
		httpUtils.send(HttpRequest.HttpMethod.POST, url, params,
				new RequestCallBack<String>() {

					@Override
					public void onStart() {
						progressDialog.show();
					}

					@Override
					public void onLoading(long total, long current,
							boolean isUploading) {
						// 設置ProgressDialog 的進度條是否不明確 false 就是不設置爲不明確
						progressDialog.setIndeterminate(false);
						progressDialog.setProgress((int) current);
						progressDialog.setMax((int) total);
					}

					@Override
					public void onSuccess(ResponseInfo<String> arg0) {
						System.out.println(arg0.statusCode);
						System.out.println(arg0.result);
						progressDialog.dismiss();
						Message msg = Message.obtain();
						msg.obj = arg0.result;
						handler.sendMessage(msg);
					}

					@Override
					public void onFailure(HttpException arg0, String arg1) {
						progressDialog.dismiss();
						arg0.printStackTrace();
						Message msg = Message.obtain();
						msg.obj = Constants.TAG_FAILURE;
						handler.sendMessage(msg);
					}
				});
	}

	/**
	 * 從服務器上下載文件保存到系統磁盤上
	 * 
	 * @param saveLocation
	 *            下載的文件保存路徑
	 * @param downloadBtn
	 *            觸發下載操作的控件按鈕，用於設置下載進度情況
	 */
	public void downloadFile(String saveLocation, final Button downloadBtn) {
		httpUtils.download(url, saveLocation + filename,
				new RequestCallBack<File>() {

					@Override
					public void onStart() {
						downloadBtn.setText("連接服務器中...");
					}

					@Override
					public void onLoading(long total, long current,
							boolean isUploading) {
						DecimalFormat df = new DecimalFormat("#.##");
						downloadBtn.setText("下載中... "
								+ df.format((double) current / 1024 / 1024)
								+ "MB/"
								+ df.format((double) total / 1024 / 1024)
								+ "MB");
					}

					@Override
					public void onSuccess(ResponseInfo<File> arg0) {
						downloadBtn.setText("打開文件");
						CommonToast.showLongToastMessage(context, "下載成功！文件（"
								+ arg0.result.getAbsolutePath()
								+ "）保存在內部存儲的Educ文件夾下。");
					}

					@Override
					public void onFailure(HttpException arg0, String arg1) {
						progressDialog.dismiss();
						arg0.printStackTrace();
						CommonToast.showShortToastMessage(context, "下載失敗，請重試！");
						downloadBtn.setText("下載附件");
					}
				});
	}

	/**
	 * 從服務器上下載文件保存到系統磁盤上，此方法會彈出進度對話框顯示下載進度信息（
	 * 有的需要知道文件是否下載完成，如果下載完成返回的是改文件在磁盤中的完整路徑）
	 * 
	 * @param saveLocation
	 *            下載的文件保存路徑
	 */
	public void downloadFile(String saveLocation) {
		progressDialog.setTitle("下載中，請稍等...");
		progressDialog.setCancelable(false);
		progressDialog.setCanceledOnTouchOutside(false);
		// 設置進度條風格，風格爲水平進度條
		progressDialog.setProgressStyle(ProgressDialog.STYLE_HORIZONTAL);
		// 設置ProgressDialog 的進度條是否不明確 false 就是不設置爲不明確
		progressDialog.setIndeterminate(false);
		httpUtils.download(url, saveLocation + filename,
				new RequestCallBack<File>() {

					@Override
					public void onStart() {
						progressDialog.show();
					}

					@Override
					public void onLoading(long total, long current,
							boolean isUploading) {
						progressDialog.setProgress((int) current);
						progressDialog.setMax((int) total);
					}

					@Override
					public void onSuccess(ResponseInfo<File> arg0) {
						progressDialog.dismiss();
						CommonToast.showLongToastMessage(context, "下載成功！文件（"
								+ arg0.result.getAbsolutePath()
								+ "）保存在內部存儲的Educ文件夾下。");
						if (handler != null) {
							Message msg = Message.obtain();
							msg.obj = arg0.result.getAbsoluteFile();
							handler.sendMessage(msg);
						}
					}

					@Override
					public void onFailure(HttpException arg0, String arg1) {
						progressDialog.dismiss();
						arg0.printStackTrace();
						CommonToast.showShortToastMessage(context, "下載失敗，請重試！");
					}
				});
	}

}

/**
 * 單例模式獲取HttpUtils對象
 * 
 * @author Shyky
 * @date 2014-11-19
 */
class XutilsHttpClient {

	private static HttpUtils client;

	/**
	 * 單例模式獲取實例對象
	 * 
	 * @param context
	 *            應用程序上下文
	 * @return HttpUtils對象實例
	 */
	public synchronized static HttpUtils getInstence(Context context) {
		if (client == null) {
			// 設置請求超時時間爲10秒
			client = new HttpUtils(1000 * 10);
			client.configSoTimeout(1000 * 10);
			client.configResponseTextCharset("UTF-8");
			// 保存服務器端(Session)的Cookie
			PreferencesCookieStore cookieStore = new PreferencesCookieStore(
					context);
			cookieStore.clear(); // 清除原來的cookie
			client.configCookieStore(cookieStore);
		}
		return client;
	}

}