如何限制自动完成文本视图下拉列表关闭



我正在研究一个AutoCompleteTextView。当用户输入AutoCompleteTextView时,我得到一些结果,这些结果是必须选择的。但问题是,当单击srceen中的任何位置时,下拉列表会自动关闭。我想避免这种情况。有什么办法可以做到这一点。

谢谢。

private boolean setForceIgnoreOutsideTouchWithReflexion(boolean forceIgnoreOutsideTouch) {
    try {
        Method method = android.widget.AutoCompleteTextView.class.getMethod("setForceIgnoreOutsideTouch", boolean.class);
        method.invoke(this, forceIgnoreOutsideTouch);
        return true;
    } catch (Exception e) {
        return false;
    }
}

只有public class CustomAutoCompleteTextView extends AutoCompleteTextView的反射,但是 - 也许这也不是一个好的解决方案

请尝试下面的代码。

我正在使用自动完成文本来自动完成用户当前所在的位置,locationList 只不过是我在字符串.xml文件中编写的数组,因此请在此处使用您自己的字符串数组。

  locationList = res.getStringArray(R.array.ticketLocation);
        ArrayAdapter<String> locationAdapter = new ArrayAdapter<String>(this,
                android.R.layout.simple_list_item_1, locationList);
        AutoCompleteTextView textView = (AutoCompleteTextView) findViewById(R.id.txtCountries);
        textView.setThreshold(1);
        textView.setAdapter(locationAdapter);
        textView.setValidator(new Validator());
        textView.setOnFocusChangeListener(new FocusListener());
        textView.setOnItemClickListener(new AdapterView.OnItemClickListener() {
            @Override
            public void onItemClick(AdapterView<?> parent, View view,
                                    int position, long id) {
                // TODO Auto-generated method stub
                TextView ticketLocation = (TextView) view;
                getTicketLocation = ticketLocation.getText().toString();
            }
        });

下面是用于验证位置字段中的文本输入的代码,fixText() 方法可防止用户键入字符串数组中不存在的文本,例如: 如果用户键入的"德国"在您的字符串数组列表中不存在,它将被替换为" ",这是您的 edittext 输入字段中的空字符串

 class Validator implements AutoCompleteTextView.Validator {
        @Override
        public boolean isValid(CharSequence text) {
            // Log.v("Test", "Checking if valid: " + text);
            Arrays.sort(locationList);
            if (Arrays.binarySearch(locationList, text.toString()) > 0) {
                return true;
            }
            return false;
        }
        @Override
        public CharSequence fixText(CharSequence invalidText) {
            // Log.v("Test", "Returning fixed text");
            /*
             * I'm just returning an empty string here, so the field will be
             * blanked, but you could put any kind of action here, like popping
             * up a dialog?
             *
             * Whatever value you return here must be in the list of valid
             * words.
             */
            return "";
        }
    }
    class FocusListener implements View.OnFocusChangeListener {
        @Override
        public void onFocusChange(View v, boolean hasFocus) {
            // Log.v("Test", "Focus changed");
            if (v.getId() == R.id.txtCountries && !hasFocus) {
                // Log.v("Test", "Performing validation");
                ((AutoCompleteTextView) v).performValidation();
            }
        }
    }

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