安卓：禁用DialogFragment确定/取消按钮 [英] Android: disable DialogFragment OK/Cancel buttons

问题描述

我如何禁用确定/取消DialogFragment的按钮？
我试着打电话myAlertDialogFragment.getDialog（），但它总是返回null甚至一度显示片段

How can I disable OK/Cancel button of a DialogFragment when it is created using an AlertDialog ? I tried calling myAlertDialogFragment.getDialog() but it's always returning null even once the fragment is displayed

public static class MyAlertDialogFragment extends DialogFragment {

    public static MyAlertDialogFragment newInstance(int title) {
        MyAlertDialogFragment frag = new MyAlertDialogFragment();
        Bundle args = new Bundle();
        args.putInt("title", title);
        frag.setArguments(args);
        return frag;
    }

    @Override
    public Dialog onCreateDialog(Bundle savedInstanceState) {
        int title = getArguments().getInt("title");

        return new AlertDialog.Builder(getActivity())
                .setIcon(R.drawable.alert_dialog_icon)
                .setTitle(title)
                .setPositiveButton(R.string.alert_dialog_ok,
                    new DialogInterface.OnClickListener() {
                        public void onClick(DialogInterface dialog, int whichButton) {
                            ((FragmentAlertDialog)getActivity()).doPositiveClick();
                        }
                    }
                )
                .setNegativeButton(R.string.alert_dialog_cancel,
                    new DialogInterface.OnClickListener() {
                        public void onClick(DialogInterface dialog, int whichButton) {
                            ((FragmentAlertDialog)getActivity()).doNegativeClick();
                        }
                    }
                )
                .create();
    }
}

我知道我可以膨胀的布局包含一个取消和OK键，但我宁愿使用如果可能的解决方案AlertDialog

I know I can to it by inflating a layout that contains both a cancel and an ok button, but I rather use the AlertDialog solution if possible

推荐答案

附上您的AlertDialog变量：

Attach your AlertDialog to variable:

AlertDialog.Builder builder = new AlertDialog.Builder(this);
(initialization of your dialog)
AlertDialog alert = builder.create();
alert.show();

，然后从AlertDialogand获得按钮将它设置禁用/启用：

And then get button from your AlertDialogand set it disable/enable:

Button buttonNo = alert.getButton(AlertDialog.BUTTON_NEGATIVE);
buttonNo.setEnabled(false);

它给你机会，在运行时修改按钮属性。

It give you opportunity to change button properties on runtime.

然后回到您的警报变量。

Then return your alert variable.

AlertDialog必须获得其意见之前显示。

AlertDialog must be showed before acquiring its views.

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