How to implement the Android ActionBar back button?

Question

I have an activity with a listview. When the user click the item, the item \"viewer\" opens:

List1.setOnItemClickListener(new OnItemClickListener() {
    @Ov         


        

Answer 1

Following Steps are much enough to back button:

Step 1: This code should be in Manifest.xml

Step 2: You won't give

finish();

in your Parent Activity while starting Child Activity.

Step 3: If you need to come back to Parent Activity from Child Activity, Then you just give this code for Child Activity.

startActivity(new Intent(ParentActivity.this, ChildActivity.class));