android numberpicker无法读取键盘数字输入(android numberpicker can't read keyboard number input)

android numberpicker无法读取键盘数字输入(android numberpicker can't read keyboard number input)

我正在尝试创建一个数字选择器来选择一个月。 只要我通过滚动选择值或者如果我使用键盘输入月份文本（例如januari的“jan”），它就可以工作

我也希望我的用户能够输入'1'来选择januari。 从numberpicker源代码，似乎这应该是可能的：

/** * @return The selected index given its displayed <code>value</code>. */ private int getSelectedPos(String value) { if (mDisplayedValues == null) { try { return Integer.parseInt(value); } catch (NumberFormatException e) { // Ignore as if it's not a number we don't care } } else { for (int i = 0; i < mDisplayedValues.length; i++) { // Don't force the user to type in jan when ja will do value = value.toLowerCase(); if (mDisplayedValues[i].toLowerCase().startsWith(value)) { return mMinValue + i; } } /* * The user might have typed in a number into the month field i.e. * 10 instead of OCT so support that too. */ try { return Integer.parseInt(value); } catch (NumberFormatException e) { // Ignore as if it's not a number we don't care } } return mMinValue; }

问题是，如果我尝试输入一个数字，EditText就会保持为空。 这是我初始化我的numberpicker的方式：

//getting the months using Calendar Calendar cal = Calendar.getInstance(); Map<String, Integer> monthMap = cal.getDisplayNames(Calendar.MONTH, Calendar.LONG, Locale.getDefault()); TreeMap<Integer, String> sorted = new TreeMap<>(); for(Map.Entry<String, Integer> entry : monthMap.entrySet()) { sorted.put(entry.getValue(), entry.getKey()); } String[] displayNames = sorted.values().toArray(new String[]{}); mMonthPicker.setMinValue(0); mMonthPicker.setMaxValue(11); mMonthPicker.setDisplayedValues(displayNames); mMonthPicker.setWrapSelectorWheel(false);

我尝试使用此处给出的答案将edittext的inputtype设置为InputType.TYPE_NULL，但这并没有改变任何内容。

如果我尝试输入数字，编辑文本将保持为空。

I'm trying to create a numberpicker to select a month. It works aslong as I select the value through scrolling or if i use the keyboard to input the month by text (e.g. "jan" for januari)

I also want my users to be able to input '1' to select januari. From numberpicker source code, it seems this should be possible:

/** * @return The selected index given its displayed <code>value</code>. */ private int getSelectedPos(String value) { if (mDisplayedValues == null) { try { return Integer.parseInt(value); } catch (NumberFormatException e) { // Ignore as if it's not a number we don't care } } else { for (int i = 0; i < mDisplayedValues.length; i++) { // Don't force the user to type in jan when ja will do value = value.toLowerCase(); if (mDisplayedValues[i].toLowerCase().startsWith(value)) { return mMinValue + i; } } /* * The user might have typed in a number into the month field i.e. * 10 instead of OCT so support that too. */ try { return Integer.parseInt(value); } catch (NumberFormatException e) { // Ignore as if it's not a number we don't care } } return mMinValue; }

The problem is, if I try to input a number, the EditText just stays empty. This is how I initialise my numberpicker:

//getting the months using Calendar Calendar cal = Calendar.getInstance(); Map<String, Integer> monthMap = cal.getDisplayNames(Calendar.MONTH, Calendar.LONG, Locale.getDefault()); TreeMap<Integer, String> sorted = new TreeMap<>(); for(Map.Entry<String, Integer> entry : monthMap.entrySet()) { sorted.put(entry.getValue(), entry.getKey()); } String[] displayNames = sorted.values().toArray(new String[]{}); mMonthPicker.setMinValue(0); mMonthPicker.setMaxValue(11); mMonthPicker.setDisplayedValues(displayNames); mMonthPicker.setWrapSelectorWheel(false);

I tried setting the inputtype for the edittext to InputType.TYPE_NULL using the answer given here but that didn't change anything.

The Edit Text stays empty if I try to input a number.

最满意答案

我终于弄明白了。 由于EditText上的过滤器，numberpicker不允许月份输入的数字。

我通过从numberpicker源代码复制NumberKeyListener的一些代码并调整它以便接受数字输入来解决它。

然后我在EditText上添加了这个过滤器，我通过查看子视图并检查当前视图是否为EditText来查找。 我在答案中找到了查找EditText的代码： NumberPicker不能用于键盘

我的代码看起来像这样：

mInputText = findInput(mMonthPicker); mInputText.setFilters(new InputFilter[]{ new InputTextFilter() });

这是我的过滤器：

/** * Filter for accepting only valid indices or prefixes of the string * representation of valid indices. */ class InputTextFilter extends NumberKeyListener { /** * The numbers accepted by the input text's {@link android.view.LayoutInflater.Filter} */ private final char[] DIGIT_CHARACTERS = new char[] { // Latin digits are the common case '0', '1', '2', '3', '4', '5', '6', '7', '8', '9', // Arabic-Indic '\u0660', '\u0661', '\u0662', '\u0663', '\u0664', '\u0665', '\u0666', '\u0667', '\u0668' , '\u0669', // Extended Arabic-Indic '\u06f0', '\u06f1', '\u06f2', '\u06f3', '\u06f4', '\u06f5', '\u06f6', '\u06f7', '\u06f8' , '\u06f9', // Hindi and Marathi (Devanagari script) '\u0966', '\u0967', '\u0968', '\u0969', '\u096a', '\u096b', '\u096c', '\u096d', '\u096e' , '\u096f', // Bengali '\u09e6', '\u09e7', '\u09e8', '\u09e9', '\u09ea', '\u09eb', '\u09ec', '\u09ed', '\u09ee' , '\u09ef', // Kannada '\u0ce6', '\u0ce7', '\u0ce8', '\u0ce9', '\u0cea', '\u0ceb', '\u0cec', '\u0ced', '\u0cee' , '\u0cef' }; // XXX This doesn't allow for range limits when controlled by a // soft input method! public int getInputType() { return InputType.TYPE_CLASS_TEXT; } @Override protected char[] getAcceptedChars() { return DIGIT_CHARACTERS; } @Override public CharSequence filter(CharSequence source, int start, int end, Spanned dest, int dstart, int dend) { Log.v("filter", "source:" + source.toString()); CharSequence filtered = String.valueOf(source.subSequence(start, end)); Log.v("filter", "filtered:" + filtered.toString()); if (TextUtils.isEmpty(filtered)) { return ""; } String result = String.valueOf(dest.subSequence(0, dstart)) + filtered + dest.subSequence(dend, dest.length()); String str = String.valueOf(result).toLowerCase(); try{ int value = Integer.parseInt(str); if(1 <= value && value <= 12) { return source; } } catch(NumberFormatException e) { //continue with the checking } for (String val : mMonthPicker.getDisplayedValues()) { String valLowerCase = val.toLowerCase(); if (valLowerCase.startsWith(str)) { final int selstart = result.length(); final int selend = val.length(); mInputText.post(new Runnable() { @Override public void run() { mInputText.setSelection(selstart, selend); } }); return val.subSequence(dstart, val.length()); } } return ""; } }

这是找到EditText的代码：

private EditText findInput(ViewGroup np) { int count = np.getChildCount(); for (int i = 0; i < count; i++) { final View child = np.getChildAt(i); if (child instanceof ViewGroup) { findInput((ViewGroup) child); } else if (child instanceof EditText) { return (EditText) child; } } return null; }

I finally figured it out. The numberpicker didn't allow numbers for month input because of the filter on the EditText.

I solved it by copying some code of the NumberKeyListener from numberpicker source code and adjusting it so it would accept numeric input.

Then i added this filter on the EditText, which I look up by going through the childviews and checking if the current view is an EditText. I found the code for looking up the EditText in the answer here: NumberPicker doesn't work with keyboard

my code looks like this:

mInputText = findInput(mMonthPicker); mInputText.setFilters(new InputFilter[]{ new InputTextFilter() });

this is my filter:

/** * Filter for accepting only valid indices or prefixes of the string * representation of valid indices. */ class InputTextFilter extends NumberKeyListener { /** * The numbers accepted by the input text's {@link android.view.LayoutInflater.Filter} */ private final char[] DIGIT_CHARACTERS = new char[] { // Latin digits are the common case '0', '1', '2', '3', '4', '5', '6', '7', '8', '9', // Arabic-Indic '\u0660', '\u0661', '\u0662', '\u0663', '\u0664', '\u0665', '\u0666', '\u0667', '\u0668' , '\u0669', // Extended Arabic-Indic '\u06f0', '\u06f1', '\u06f2', '\u06f3', '\u06f4', '\u06f5', '\u06f6', '\u06f7', '\u06f8' , '\u06f9', // Hindi and Marathi (Devanagari script) '\u0966', '\u0967', '\u0968', '\u0969', '\u096a', '\u096b', '\u096c', '\u096d', '\u096e' , '\u096f', // Bengali '\u09e6', '\u09e7', '\u09e8', '\u09e9', '\u09ea', '\u09eb', '\u09ec', '\u09ed', '\u09ee' , '\u09ef', // Kannada '\u0ce6', '\u0ce7', '\u0ce8', '\u0ce9', '\u0cea', '\u0ceb', '\u0cec', '\u0ced', '\u0cee' , '\u0cef' }; // XXX This doesn't allow for range limits when controlled by a // soft input method! public int getInputType() { return InputType.TYPE_CLASS_TEXT; } @Override protected char[] getAcceptedChars() { return DIGIT_CHARACTERS; } @Override public CharSequence filter(CharSequence source, int start, int end, Spanned dest, int dstart, int dend) { Log.v("filter", "source:" + source.toString()); CharSequence filtered = String.valueOf(source.subSequence(start, end)); Log.v("filter", "filtered:" + filtered.toString()); if (TextUtils.isEmpty(filtered)) { return ""; } String result = String.valueOf(dest.subSequence(0, dstart)) + filtered + dest.subSequence(dend, dest.length()); String str = String.valueOf(result).toLowerCase(); try{ int value = Integer.parseInt(str); if(1 <= value && value <= 12) { return source; } } catch(NumberFormatException e) { //continue with the checking } for (String val : mMonthPicker.getDisplayedValues()) { String valLowerCase = val.toLowerCase(); if (valLowerCase.startsWith(str)) { final int selstart = result.length(); final int selend = val.length(); mInputText.post(new Runnable() { @Override public void run() { mInputText.setSelection(selstart, selend); } }); return val.subSequence(dstart, val.length()); } } return ""; } }

and this is the code to find the EditText:

private EditText findInput(ViewGroup np) { int count = np.getChildCount(); for (int i = 0; i < count; i++) { final View child = np.getChildAt(i); if (child instanceof ViewGroup) { findInput((ViewGroup) child); } else if (child instanceof EditText) { return (EditText) child; } } return null; }