弹框--更新下载--安装

 1  /**  2  * show出对话框  3 */  4 private void showUpdataDialog() {  5 AlertDialog.Builder builder = new Builder(this);  6 builder.setTitle("版本升级");  7  builder.setMessage(info.getDescription());  8 builder.setCancelable(false);  9 builder.setPositiveButton("是", new OnClickListener() { 10 public void onClick(DialogInterface dialog, int which) { 11 System.out.println("升级"); 12 // 判断SD卡状态是否可用 13 if (Environment.getExternalStorageState().equals( 14  Environment.MEDIA_MOUNTED)) { 15 // 下载是耗时的工作，需要放入到子线程里面去执行 16 DownLoadFileThreadTask download = new DownLoadFileThreadTask( 17 info.getApkurl(), "/sdcard/new.apk"); 18  pd.show(); 19 new Thread(download).start(); 20  mainUI(); 21 } else { 22 23  } 24  } 25  }); 26 builder.setNegativeButton("否", new OnClickListener() { 27 public void onClick(DialogInterface dialog, int which) { 28 System.out.println("不升级，进入主界面"); 29  mainUI(); 30  } 31  }); 32  builder.create().show(); 33  } 34 35 /** 36  * 安装apk 37 */ 38 private void installAPK(File file) { 39 Intent intent = new Intent(); 40  intent.setAction(Intent.ACTION_VIEW); 41  intent.setDataAndType(Uri.fromFile(file), 42 "application/vnd.android.package-archive"); 43  finish(); 44  startActivity(intent); 45  } 46 47 /** 48  * 下载APK 49 */ 50 private class DownLoadFileThreadTask implements Runnable { 51  String apkurl; 52  String fileurl; 53 54 public DownLoadFileThreadTask(String apkurl, String fileurl) { 55 this.apkurl = apkurl; 56 this.fileurl = fileurl; 57  } 58 59 public void run() { 60 DownLoadFileTask down = new DownLoadFileTask(); 61 try { 62 File file = down.getFile(apkurl, fileurl, pd); 63 System.out.println("下载完成，进行安装"); 64  pd.dismiss(); 65  installAPK(file); 66 } catch (Exception e) { 67  e.printStackTrace(); 68 Toast.makeText(getApplicationContext(), "下载文件失败", 0).show(); 69  pd.dismiss(); 70  mainUI(); 71  } 72  } 73  } 74 75 /** 76  * 获得版本号 77 */ 78 private String getVession() { 79 80 try { 81 PackageManager pm = getPackageManager(); 82 // 第一个参数获得包的名字 83 PackageInfo info = pm.getPackageInfo(getPackageName(), 0); 84 return info.versionName; 85 } catch (Exception e) { 86 // TODO Auto-generated catch block 87  e.printStackTrace(); 88  } 89 return null; 90 }

 

 1 package cn.itcast.mobilesafe.engine;  2  3 import java.io.File;  4 import java.io.FileOutputStream;  5 import java.io.InputStream;  6 import java.net.HttpURLConnection;  7 import java.net.URL;  8 import android.app.ProgressDialog;  9 10 public class DownLoadFileTask { 11 12 /** 13  * 14  * @param path 15  * 服务器文件路径 16  * @param filepath 17  * 本地文件路径 18  * @return 本地文件对象 19  * @throws Exception 20 */ 21 public static File getFile(String path, String filepath, ProgressDialog pd) 22 throws Exception { 23 URL url = new URL(path); 24 HttpURLConnection conn = (HttpURLConnection) url.openConnection(); 25 conn.setRequestMethod("GET"); 26 conn.setConnectTimeout(5000); 27 if (conn.getResponseCode() == 200) { 28 int total = conn.getContentLength(); 29  pd.setMax(total); 30 InputStream is = conn.getInputStream(); 31 File file = new File(filepath); 32 FileOutputStream fos = new FileOutputStream(file); 33 byte[] buffer = new byte[1024]; 34 int len = 0; 35 int process = 0; 36 while ((len = is.read(buffer)) != -1) { 37 fos.write(buffer, 0, len); 38 process += len; 39  pd.setProgress(process); 40 Thread.sleep(50); 41  } 42  fos.flush(); 43  fos.close(); 44  is.close(); 45 46 return file; 47  } 48 return null; 49  } 50 }