软件更新相关，使用utuils框架在线升级，显示progressDialog，下载完成后自动弹出安装界面。

 1     private void updateDownload() {
 2         //检测内存设备是否可用
 3         if (Environment.getExternalStorageState().equals(Environment.MEDIA_MOUNTED)){
 4             //设置存储路径
 5             final String targer = Environment.getExternalStorageDirectory() + "/update.apk";
 6             Log.e("test","存储路径：" + targer);
 7             HttpUtils utils = new HttpUtils();
 8             Log.e("test","创建httputils");
 9 
10             utils.download(mDownloadUrl, targer, new RequestCallBack<File>() {
11                 //设置progressDialog
12                 ProgressDialog progressDialog =  new ProgressDialog(SplashActivity.this);
13                 //更新下载进度
14                 @Override
15                 public void onLoading(long total, long current, boolean isUploading) {
16                     super.onLoading(total, current, isUploading);
17                     LogUtils.e("进度：" + current);
18                     progressDialog.setTitle("正在下载：");
19 
20                     //以百分比的形式设置当前下载进度
21                     int bar = (int) (current*100/total);
22                     progressDialog.setMessage("当前下载：" + bar + "%");
23                     //将progress显示出来
24                     progressDialog.show();
25                 }
26 
27                 //成功
28                 @Override
29                 public void onSuccess(ResponseInfo<File> responseInfo) {
30                     Log.e("test","下载成功");
31                     //打开安装包
32                     Intent intent = new Intent(Intent.ACTION_VIEW);
33                     intent.addCategory(Intent.CATEGORY_DEFAULT);
34                     intent.setDataAndType(Uri.fromFile(responseInfo.result),
35                             "application/vnd.android.package-archive");
36                     // startActivity(intent);
37                     // 如果用户取消安装的话,会返回结果,回调方法onActivityResult
38                     startActivityForResult(intent, 0);
39                 }
40 
41                 //失败
42                 @Override
43                 public void onFailure(HttpException e, String s) {
44                     Toast.makeText(SplashActivity.this,"下载失败",Toast.LENGTH_SHORT);
45                     enterHome();
46                 }
47 
48             });
49         } else {
50             //没有内存卡
51             Toast.makeText(SplashActivity.this,"未检测到存储设备",Toast.LENGTH_SHORT);
52             enterHome();
53         }
54 
55     }
56 
57     //用户取消安装软件时
58     @Override
59     protected void onActivityResult(int requestCode, int resultCode, Intent data) {
60         super.onActivityResult(requestCode, resultCode, data);
61         enterHome();
62     }