如何在 Dialog onClick 事件中访问 'findViewById' 方法

Question

我有一个名为 login_form 的自定义布局 xml 文件和一个名为 login_form_root 的 LinearLayout 根文件。我正在尝试使用对话框显示此布局，但无法从 EditText 获取值，因为我无法在 onCreateDialog.

中解析方法 findViewById

AlertDialog.Builder builder = new AlertDialog.Builder(getActivity());
final LayoutInflater inflater = getActivity().getLayoutInflater();
builder.setView(inflater.inflate(R.layout.login_form, null));
builder.setPositiveButton(okText, new DialogInterface.OnClickListener() {

@Override
public void onClick(DialogInterface dialog, int which) {
       View myView = inflater.inflate(R.layout.login_form, (ViewGroup) findViewById(R.id.login_form_root));
       EditText userEmail = (EditText) myView.findViewById(R.id.email_address);
       userEmailValue = userEmail.getText().toString();
       Toast.makeText(getActivity(), userEmailValue, Toast.LENGTH_SHORT).show();
        }

错误在这里：-

"(ViewGroup) findViewById(R.id.login_form_root)"

那么如何扩展自定义布局以获得 EditText 值？

Answer 1

你应该在膨胀它的时候保存它，然后你可以在以后使用它


        AlertDialog.Builder builder = new AlertDialog.Builder(getActivity());
        LayoutInflater layoutInflater = LayoutInflater.from(getActivity());
        final View view = layoutInflater.inflate(R.layout.login_form, null);
        builder.setView(view);
        AlertDialog dialog = builder.create();

        builder.setPositiveButton("OK", new DialogInterface.OnClickListener() {
            @Override
            public void onClick(DialogInterface dialog, int which) {
                EditText userEmail = (EditText) view.findViewById(R.id.email_address);
                String userEmailValue = userEmail.getText().toString();
            }
        });

如何在 Dialog onClick 事件中访问 'findViewById' 方法

How to access 'findViewById' method inside Dialog onClick event

android

android-layout

layout-inflater

android-dialogfragment