android 检查软件是否有更新版本

import java.net.HttpURLConnection;

import java.net.URL;

import java.util.HashMap;

import com.yuxin.mhealth.R;

import com.yuxin.mhealth.http.action.BaseAction;

import com.yuxin.mhealth.ui.BaseActivity;

import com.yuxin.mhealth.utils.DialogUtil;

import com.yuxin.mhealth.utils.SysConstact;

import com.yuxin.mhealth.utils.SysDownloadUtils;

import android.annotation.SuppressLint;

import android.app.AlertDialog;

import android.app.Dialog;

import android.app.AlertDialog.Builder;

import android.content.Context;

import android.content.DialogInterface;

import android.content.DialogInterface.OnClickListener;

import android.content.pm.PackageManager.NameNotFoundException;

import android.os.Handler;

import android.os.Message;

/**

 * @description 软件更新





 */

public class UpdateManagerActivity extends BaseActivity {

/* 保存解析的XML信息 */

 HashMap<String, String> mHashMap;

private Context mContext;

@SuppressLint("HandlerLeak")

 private Handler mHandler = new Handler() {

  public void handleMessage(Message msg) {

   switch (msg.what) {

   case 0x003:

    closeProgressDialog();

    // 显示新版本更新对话框

    showNoticeDialog();

    break;

   case 0x004:

    doProgressDialog("当前已经是最新版本!");

    closeProgressDialog();

    break;

   case 0x005:

    doProgressDialog("检查更新失败!");

    closeProgressDialog();

    break;

   default:

    break;

   }

  };

 };

protected void onCreate(android.os.Bundle savedInstanceState) {

  super.onCreate(savedInstanceState);

  mContext = this;

 };

/**

  * 检测软件更新

  */

 public void checkUpdate() {

  switch (isUpdate()) {

  case 0:

   mHandler.sendEmptyMessage(0x005);

   break;

  case 1:

   // 显示提示对话框

   mHandler.sendEmptyMessage(0x003);

   break;

  case 2:

   mHandler.sendEmptyMessage(0x004);

   break;

  default:

   break;

  }

}

/**

  * 检查软件是否有更新版本

  *

  * @return

  * @throws Exception

  */

 private int isUpdate() {

  // 获取当前软件版本

  int versionCode = getVersionCode(mContext);

  URL url;

// 获取，解析XML文件。 由于XML文件比较小，因此使用DOM方式进行解析

  ParseXmlService service = new ParseXmlService();

  try {

url = new URL(BaseAction.getUploadUrl(this));

   HttpURLConnection con = (HttpURLConnection) url.openConnection();

   mHashMap = service.parseXml(con.getInputStream());

  } catch (Exception e) {

   e.printStackTrace();

  }

  if (null != mHashMap) {

   SysConstact.Log("版本" + mHashMap.get("version"));

   int serviceCode = Integer.valueOf(mHashMap.get("version").trim());

   // 版本判断

   if (serviceCode > versionCode) {

    return 1;

   } else {

    return 2;

   }

  }

  return 0;

 }

/**

  * 获取软件版本号

  *

  * @param context

  *            context

  * @return

  */

 private int getVersionCode(Context context) {

  int versionCode = 0;

  try {

   String packageName = context.getPackageName();

   // 获取软件版本号，对应AndroidManifest.xml下android:versionCode

   versionCode = context.getPackageManager().getPackageInfo(

     packageName, 0).versionCode;

  } catch (NameNotFoundException e) {

   e.printStackTrace();

  }

  return versionCode;

 }

/**

  * 显示软件更新对话框

  */

 private void showNoticeDialog() {

  // 构造对话框

  AlertDialog.Builder builder = new Builder(mContext);

  builder.setTitle(R.string.soft_update_title);

  builder.setMessage(R.string.soft_update_info);

  // 更新

  builder.setPositiveButton(R.string.soft_update_updatebtn,

    new OnClickListener() {

     @Override

     public void onClick(DialogInterface dialog, int which) {

      

      // 显示下载对话框

      DialogUtil.toast(getApplicationContext(), "下载已经开始,可以在通知栏查看进度!");

      SysDownloadUtils.start(getApplicationContext(), mHashMap.get("url").trim(),mHashMap.get("name").trim());

      dialog.dismiss();

     }

    });

  // 稍后更新

  builder.setNegativeButton(R.string.soft_update_later,

    new OnClickListener() {

     @Override

     public void onClick(DialogInterface dialog, int which) {

      dialog.dismiss();

     }

    });

  Dialog noticeDialog = builder.create();

  noticeDialog.show();

 }

}