Java – remove the back arrow button from the action bar

In my android project, whenever I go from first activity to second, I get a left arrow button, followed by some text in the action bar The left arrow only appears when I set the first activity as the hierarchical parent of the second activity

I want to delete the back button and replace it with an icon I've read other posts on the same issue, so I've tried the following code in the oncreate () method

getActionBar().setDisplayHomeAsUpEnabled(false);

But after reaching the second activity, the application crashed

Please help me

Solution

Use the getsupportactionbar() column:

getSupportActionBar().setDisplayHomeAsUpEnabled(false);
getSupportActionBar().setHomeButtonEnabled(false);