Android版本检测\自动更新(3)

                        })  
                .setNegativeButton("Cancel",  
                        new DialogInterface.OnClickListener() {  
                            public void onClick(DialogInterface dialog,  
                                    int which) {  
                                dialog.cancel();  
                            }  
                        }).show();  
    }  
    public void showWaitDialog() {  
        dialog = new ProgressDialog(activity);  
        dialog.setMessage("Waitting for update...");  
        dialog.setIndeterminate(true);  
        dialog.setCancelable(true);  
        dialog.show();  
    }  
    public void getCurrentVersion() {  
        try {  
            PackageInfo info = activity.getPackageManager().getPackageInfo(  
                    activity.getPackageName(), 0);  
            this.versionCode = info.versionCode;  
            this.versionName = info.versionName;  
        } catch (NameNotFoundException e) {  
            e.printStackTrace();  
        }