java - 如何在几个 fragment 之间后退

Question

如何在多个 fragment 之间返回按下按钮:

public class MyFragment extends Fragment implements OnBackClickListener{


@Override
public void onAttach(Activity activity) {
    super.onAttach(activity);

}


}

Answer 1

在 Activity 中覆盖 onBackPressed 并在提交之前将所有 Fragments 添加到 BackStack:

@Override
public void onBackPressed() {
    final int count = getSupportFragmentManager().getBackStackEntryCount();
    if (count == 0) {
        super.onBackPressed();
    } else {
        getSupportFragmentManager().popBackStack();
    }
}