android - How to Logout from the application

Question

My Application have 5 activities(A1,A2,A3,A4,A5). Each activity have one text view and one button(B1,B2,B3,B4,B5). If you click on that button then goes to next activity. su

Answer 1

Suppose you have four activities (A,B,C,D) and you want to develop Logout functionality in your app using Menu buttons.

Step 1: First Declare a Variable in

SearchHelper.logout=0;//in SearchHelper Class
//OnCreate of Activity--DashBoard
if(SearchHelper.logout==1)
{
    Intent loginscreen=new Intent(this,LoginActivity.class);
    loginscreen.addFlags(Intent.FLAG_ACTIVITY_CLEAR_TOP);
    Toast.makeText(DashBoardActivity.this, "WELCOME TO LOGINSCREEN", Toast.LENGTH_SHORT).show(); 
    startActivity(loginscreen);
    this.finish();
    SearchHelper.logout=0;
}

Step 2: onclick on logout button using menu

Intent homescreen=new Intent(this,DashBoardActivity.class);
SearchHelper.logout=1;
homescreen.addFlags(Intent.FLAG_ACTIVITY_CLEAR_TOP);
startActivity(homescreen);
this.finish();        

It will redirect to DashBoard Activity then due to SearchHelper.Logout==1 it will again redirect logout Activity. Finally, like that you can logout from anywhere using the menu buttons. without problem of onBackPressed().

Or use Single instance in manifest For Activity and handle each and every Activity onBackPressed().