Android应用程序更新并下载实例

import java.io.BufferedReader;import java.io.File;import java.io.FileOutputStream;import java.io.IOException;import java.io.InputStream;import java.io.InputStreamReader;import java.net.HttpURLConnection;import java.net.MalformedURLException;import java.net.URL;import com.af.mobile.R;import android.app.AlertDialog;import android.app.Dialog;import android.app.AlertDialog.Builder;import android.content.Context;import android.content.DialogInterface;import android.content.Intent;import android.content.DialogInterface.OnClickListener;import android.content.pm.PackageManager.NameNotFoundException;import android.net.Uri;import android.os.Environment;import android.os.Handler;import android.os.Message;import android.view.LayoutInflater;import android.view.View;import android.widget.ProgressBar;import android.widget.Toast;public class UpdateManager{private URL url=null;  /* 下载中 */  private static final int DOWNLOAD = 1;  /* 下载结束 */  private static final int DOWNLOAD_FINISH = 2;  /* 保存解析的XML信息 */  //HashMap<String, String> mHashMap;  /* 下载保存路径 */  private String mSavePath;  /* 记录进度条数量 */  private int progress;  /* 是否取消更新 */  private boolean cancelUpdate = false;  private Context mContext;  /* 更新进度条 */  private ProgressBar mProgress;  private Dialog mDownloadDialog;  private Handler mHandler = new Handler()  {    public void handleMessage(Message msg)    {      switch (msg.what)      {      // 正在下载      case DOWNLOAD:        // 设置进度条位置        mProgress.setProgress(progress);        break;      case DOWNLOAD_FINISH:        // 安装文件        installApk();        break;      default:        break;      }    };  };  public UpdateManager(Context context)  {    this.mContext = context;  }  public void checkUpdate()  {    if (isUpdate())    {      showNoticeDialog();    } else    {          }  }  /**   * 检查软件是否有更新版本   *    * @return   */  private boolean isUpdate()  {    // 获取当前软件版本    Double versionCode = getVersionCode(mContext);        Double serviceCode = 1.2;      // 版本判断      if (serviceCode > versionCode)      {        return true;      }        return false;  }  // 获取软件版本号    private Double getVersionCode(Context context)  {    Double versionCode = 0.0;    try    {      // 获取软件版本号，对应AndroidManifest.xml下android:versionCode      versionCode = (double) context.getPackageManager().getPackageInfo("com.af.mobile", 0).versionCode;    } catch (NameNotFoundException e)    {      e.printStackTrace();    }    return versionCode;  }     //显示软件更新对话框    private void showNoticeDialog()  {    AlertDialog.Builder builder = new Builder(mContext);    builder.setTitle("软件更新");    String string=download("http://192.168.0.102:9313/daojuserver/uploads/version.xml");//xml的下载地址    builder.setMessage(string);    builder.setPositiveButton("更新", new OnClickListener()    {      @Override      public void onClick(DialogInterface dialog, int which)      {        dialog.dismiss();        // 显示下载对话框        showDownloadDialog();      }    });    // 稍后更新    builder.setNegativeButton("稍后更新", new OnClickListener()    {      @Override      public void onClick(DialogInterface dialog, int which)      {        dialog.dismiss();      }    });    Dialog noticeDialog = builder.create();    noticeDialog.show();  }  // 显示软件下载对话框     private void showDownloadDialog()  {    // 构造软件下载对话框    AlertDialog.Builder builder = new Builder(mContext);    builder.setTitle("djfkjd");//提示信息内容    // 给下载对话框增加进度条    final LayoutInflater inflater = LayoutInflater.from(mContext);    View v = inflater.inflate(R.layout.softupdate_progress, null);    mProgress = (ProgressBar) v.findViewById(R.id.update_progress);    builder.setView(v);    // 取消更新    builder.setNegativeButton("取消更新", new OnClickListener()    {      @Override      public void onClick(DialogInterface dialog, int which)      {        dialog.dismiss();        // 设置取消状态        cancelUpdate = true;      }    });    mDownloadDialog = builder.create();    mDownloadDialog.show();    // 现在文件    downloadApk();  }  private void downloadApk()  {    // 启动新线程下载软件    new downloadApkThread().start();  }  private class downloadApkThread extends Thread  {    @Override    public void run()    {      try      {        // 判断SD卡是否存在，并且是否具有读写权限        if (Environment.getExternalStorageState().equals(Environment.MEDIA_MOUNTED))        {          // 获得存储卡的路径          String sdpath = Environment.getExternalStorageDirectory() + "/";          mSavePath = sdpath + "download";          URL url = new URL("http://192.168.0.102:9313/daojuserver/uploads/SpMobile.apk");//apk下载地址地址          // 创建连接          HttpURLConnection conn = (HttpURLConnection) url.openConnection();          conn.connect();          // 获取文件大小          int length = conn.getContentLength();          // 创建输入流          InputStream is = conn.getInputStream();          File file = new File(mSavePath);          if (!file.exists())          {            file.mkdir();          }          File apkFile = new File(mSavePath, "dhfudh");          FileOutputStream fos = new FileOutputStream(apkFile);          int count = 0;          // 缓存          byte buf[] = new byte[1024];          // 写入到文件中          do          {            int numread = is.read(buf);            count += numread;            // 计算进度条位置            progress = (int) (((float) count / length) * 100);            // 更新进度            mHandler.sendEmptyMessage(DOWNLOAD);            if (numread <= 0)            {              mHandler.sendEmptyMessage(DOWNLOAD_FINISH);              break;            }            fos.write(buf, 0, numread);          } while (!cancelUpdate);          fos.close();          is.close();        }      } catch (MalformedURLException e)      {        e.printStackTrace();      } catch (IOException e)      {        e.printStackTrace();      }      // 取消下载对话框显示      mDownloadDialog.dismiss();    }  };    private void installApk()  {    File apkfile = new File(mSavePath, "dhfudh");    if (!apkfile.exists())    {      return;    }    // 通过Intent安装APK文件    Intent i = new Intent(Intent.ACTION_VIEW);    i.setDataAndType(Uri.parse("file://" + apkfile.toString()), "application/vnd.android.package-archive");    mContext.startActivity(i);  }  public String download(String urlString)  {    StringBuffer sbBuffer=new StringBuffer();    String line=null;    BufferedReader buffer=null;  try {    url=new URL(urlString);    HttpURLConnection urlConn=(HttpURLConnection) url.openConnection();    buffer=new BufferedReader(new InputStreamReader(urlConn.getInputStream()));    while((line=buffer.readLine())!=null)    {      sbBuffer.append(line);    }  } catch (Exception e) {    // TODO: handle exception    e.printStackTrace();  }  finally  {    try {      buffer.close();    } catch (Exception e2) {      // TODO: handle exception      e2.printStackTrace();    }  }  return sbBuffer.toString();  }}

if(isOpenNetwork())//判断是否有网络    {      UpdateManager manager = new  UpdateManager(Main.this);    // 检查软件更新    manager.checkUpdate();          }

private boolean isOpenNetwork() {    ConnectivityManager connManager = (ConnectivityManager) getSystemService(Context.CONNECTIVITY_SERVICE);    NetworkInfo networkInfo = connManager.getActiveNetworkInfo();    if (networkInfo != null) {      // 2.获取当前网络连接的类型信息      int networkType = networkInfo.getType();      if (ConnectivityManager.TYPE_WIFI == networkType) {        // 当前为wifi网络      } else if (ConnectivityManager.TYPE_MOBILE == networkType) {        // 当前为mobile网络      }      return connManager.getActiveNetworkInfo().isAvailable();    }    return false;  }