android - Pausing an enhanced for loop -

i using enhanced loop , switch statement trigger various asynctasks. how can pause each iteration of loop wait until given asynctask compeleted? trying spawn thread , wait / join / notify when each asynctask complete keep freezing ui. below code snippet...

for (integer integer : sequence) {      switch (integer) {         case 1: // async process             break;         case 2: // async process             break;         case 3: // async process             break;         case 4: // async process             break;         default: break;           }          //need magic solution here...      } 

loop not choice. add 'finish' callback after each asynctask(). create kind of chain of code. can save last added in chain can add new item in chain.