无法在onCreateView中禁用DialogFragment的后退按钮

Question

在创建自定义Progress DialogFragment时,我有点困惑.一切正常,但由于我不希望用户"撤回"直到DialogFragment被解除,我正在尝试捕获KeyEvent并"禁用".

虽然这很好用:

    @Override
public ProgressDialog onCreateDialog(Bundle savedInstanceState) {

    final ProgressDialog dialog = new ProgressDialog(getActivity());
    dialog.setMessage(getString(R.string.loading_text));
    dialog.setIndeterminate(true);
    dialog.setCancelable(false);

    // Disable the back button
    OnKeyListener keyListener = new OnKeyListener() {

        @Override
        public boolean onKey(DialogInterface dialog, int keyCode,
                KeyEvent event) {
            if( keyCode == KeyEvent.KEYCODE_BACK){  
                return true;
            }
            return false;
        }
    };
    dialog.setOnKeyListener(keyListener);
    return dialog;
}

使用onCreateDialog不会让我正确地膨胀片段,因此,自定义我的片段的外观和感觉.另一方面,onCreateDialog完美地捕获了按键事件.切换到onCreateView时:

@Override
public View onCreateView(LayoutInflater inflater, ViewGroup container, Bundle savedInstanceState) {
    //Inflate the XML view for the help dialog fragment
    View view = inflater.inflate(R.layout.progress_dialog_fragment, container);
    TextView text = (TextView)view.findViewById(R.id.loadingMessage);
    text.setText(Html.fromHtml(getString(R.string.loading_text)));

    // Disable the back button
    android.view.View.OnKeyListener keyListener = new android.view.View.OnKeyListener() {

        @Override
        public boolean onKey(View view, int keyCode, KeyEvent event) {
            if( keyCode == KeyEvent.KEYCODE_BACK){  
                return true;
            }
                return false;
        }
    };
    view.setOnKeyListener(keyListener);

    // request a window without the title
    getDialog().getWindow().requestFeature(Window.FEATURE_NO_TITLE);
    //Transparent Dialog background
    getDialog().getWindow().setBackgroundDrawable(new ColorDrawable(0));
    return view;
}

该事件未被捕获.这引出了另一个问题......因为我已经看到在许多SO问题中使用onCreateDialog和onCreateView ......这两者之间的区别是什么？

谢谢!

Answer 1

 DialogFragment newFragment = YourFragment.newInstance();
                newFragment.setCancelable(false);
                newFragment.show(fragmentTransaction, "dialog");

在.Show()片段之前添加setCancelable(false)