Detect logon before redirecting to each activity

Tag: blog HTTP Io ar Java SP data 2014 on

=============== Problem description ====================

Generally, You need to log on to an application. Otherwise, you will be prompted to log on to a specific activity.
I know that J2EE seems to be able to implement such a check through a filter. I wonder if there is a corresponding method in Android. Do I have to make my own judgment every time I jump to the activity?

============= Solution 1 ======================

You save the login status in an application, and then, when you jump to the application, determine whether there is login information in the application.

============= Solution 2 ======================

Generally, it is verified when data is obtained.

============= Solution 3 ======================

Write a baseactivity. Java, so all of them inherit this class. In the parent class, you can check whether you have logged on to the database SQLite or static class or sharedpreference.

============= Solution 4 ======================

Put it in sharedpreference.

Detect logon before redirecting to each activity