如何从警报对话框更改主要活动中的可见性编辑文本

Question

我设计了一个警报对话框，当用户按下保存按钮时

主要活动

public void openDialog(View view) {
    RegDialog regDialog = new RegDialog();
    regDialog.show(getSupportFragmentManager(), "Register Dialog");
}

我在MainActivity有editText ，我想在.setPositiveButton按onClick时更改 editText 的可见性

警报对话框

public Dialog onCreateDialog(@Nullable Bundle savedInstanceState) {
    AlertDialog.Builder builder = new AlertDialog.Builder(getActivity());

    LayoutInflater inflater = getActivity().getLayoutInflater();
    View view = inflater.inflate(R.layout.layout_reg_dialog, null);

    builder.setView(view)
            .setTitle("Titel")
            .setPositiveButton("Activer", new DialogInterface.OnClickListener() {
                @Override
                public void onClick(DialogInterface dialog, int which) {
                    //change visiblity editText
                }
            });

Answer 1

以同样的方式你可以调用getActivity().getLayoutInflater() ，你可以调用getActivity().findViewById() ：

@Override
public void onClick(DialogInterface dialog, int which) {
    EditText et = getActivity().findViewById(R.id.your_id_here);
    et.setVisibility(View.GONE);
}