Why onfinish(); closes the whole application?

Question

Java

It is necessary to close the current activity when calling the method onfinish();and return to the main one, but instead the entire application is closed. I pass from MainActivity to ActivityAbout and back. What is the problem? Maybe add something to the manifest?
MainActivity.class

public void onClickGo(View view) {
       Intent intent = new Intent(MainActivity.this, ActivityAbout.class);
        intent.addFlags(Intent.FLAG_ACTIVITY_NEW_TASK);
        startActivity(intent);
    }

ActivityAbout.class

public void onClickBack(View view) {
    finish();
}

Answer 1

Because we are reading the FLAG_ACTIVITY_NEW_TASK documentation . You don't need this flag.