1. 点击back键
2. 调用finish();
3. clear top的方式 startactivity
如:
Intent intent = new Intent(getActivity(), TrashClearMainAcitivity.class);
intent.putExtra(TrashClearMainAcitivity.CLEARTYPE, 1);
intent.setFlags(Intent.FLAG_ACTIVITY_SINGLE_TOP);
intent.setFlags(Intent.FLAG_ACTIVITY_CLEAR_TOP);
Utils.startActivity(getActivity(), intent);