title: Working with same data in three activities
body: <p>I'm not very experienced in android specific components, so I just can't get where I need to look.</p>
  
  <p>I have three activities: </p>
  
  <p>1st gets info about some groups of objects, user selects some of this groups and activity needs to star next activity</p>
  
  <p>2nd activity shows all objects from groups, that user selected at previous activity, here user can deselect some selected objects and then activity starts 3d activity</p>
  
  <p>3d activity allows user to do something with selected objects</p>
  
  <p>My solution is make some singleton model, that let activities get and save information about objects, </p>
  
  <p>but i suppose, that android has some special components to provide data between activities</p>
  
  <p>Help me to find this components^ please</p>