android自动更新软件版本

核心提示： import java.io.File;import java.io.FileOutputStream;import java.io.IOException;import java.io.InputStream;import java.net.HttpURLConnection;import java.net.Mal

 import java.io.File;
import java.io.FileOutputStream;
import java.io.IOException;
import java.io.InputStream;
import java.net.HttpURLConnection;
import java.net.MalformedURLException;
import java.net.URL;

import android.app.AlertDialog;
import android.app.AlertDialog.Builder;
import android.app.Dialog;
import android.content.Context;
import android.content.DialogInterface;
import android.content.DialogInterface.OnClickListener;
import android.content.Intent;
import android.net.Uri;
import android.os.Handler;
import android.os.Message;
import android.util.Log;
import android.view.LayoutInflater;
import android.view.View;
import android.widget.ProgressBar;

public class UpdateManager {
private Context mContext;
private final String updateMsg = "亲，有新版本，要更新吗！"; //下载消息提示
private Dialog noticeDialog; //下载提示对话框
private Dialog downloadDialog; //下载进度对话框
private ProgressBar mProgressBar; //进度条
private Boolean interceptFlag = false; //标记用户是否在下载过程中取消下载
private Thread downloadApkThread = null; //下载线程
private final String apkUrl = "http://www.xxx/xxx.apk"; //apk的URL地址
private final String savePath = "/sdcard/UpdateDemo/"; //下载的apk存放的路径
private final String saveFileName = savePath + "xxx.apk"; //下载的apk文件
private int progress = 0; //下载进度
private final int DOWNLOAD_ING = 1; //标记正在下载