android - 在 AlertDialog 中隐藏键盘

Question

我有一个带有编辑文本的警报对话框。对于这个 Edittext，我让键盘出现，我希望当用户按下 ok 或 cancel 来隐藏键盘时。 The strange problem is that when user choose ok, the keyboard is hide, but when choose cancel the keyboard doesn't hide an I'm using the same code for both cases.

这是我的代码:

final AlertDialog.Builder alert = new AlertDialog.Builder(this);

        alert.setTitle(data);
        final EditText input = new EditText(this);
        InputFilter[] FilterArray = new InputFilter[1];
        FilterArray[0] = new InputFilter.LengthFilter(25);
        input.setFilters(FilterArray);
        input.postDelayed(new Runnable() {
            @Override
            public void run() {
                InputMethodManager keyboard = (InputMethodManager)
                getSystemService(Context.INPUT_METHOD_SERVICE);
                keyboard.showSoftInput(input, 0); 
            }
        },200);



        alert.setView(input);

        alert.setPositiveButton(ok, new DialogInterface.OnClickListener() {
            public void onClick(DialogInterface dialog, int whichButton) {
                text = input.getText().toString().trim();
                Canvas c = new Canvas(bitmapResult);
                drawTextImage(bitmapResult);
                saveimage();
                InputMethodManager imm = (InputMethodManager)getSystemService(Context.INPUT_METHOD_SERVICE);
                imm.hideSoftInputFromWindow(input.getWindowToken(), 0);
            }
        });

        alert.setNegativeButton(cancel,
                new DialogInterface.OnClickListener() {
                    public void onClick(DialogInterface dialog, int whichButton) {
                        dialog.cancel();
                        saveimage();
                        InputMethodManager im = (InputMethodManager)getSystemService(Context.INPUT_METHOD_SERVICE);
                        im.hideSoftInputFromWindow(input.getWindowToken(), 0);
                    }
                });

        alert.show();

我的赌注在哪里？谁能帮帮我？

Answer 1

我找到了解决方案:

alert.setNegativeButton(cancel,
    new DialogInterface.OnClickListener() {
        public void onClick(DialogInterface dialog, int whichButton) {
            saveimage();
            InputMethodManager im = (InputMethodManager)getSystemService(Context.INPUT_METHOD_SERVICE);
            im.hideSoftInputFromWindow(input.getWindowToken(), 0);
            dialog.cancel();
        }
    });

我应该在隐藏键盘后放置 dialog.cancel()。

KOTLIN 更新:

val im: InputMethodManager =
    getSystemService(Context.INPUT_METHOD_SERVICE) as InputMethodManager
im.hideSoftInputFromWindow(editText.windowToken, 0)