I have to restrict characters for a particular EditText. For that, I am using
android:digits="ABCDEFGHIJKLMNOPQRSTUVWXYZ0123456789 " in XML but if I use this I am not able to get next button on the soft keyboard in spite of me showing android:imeOptions="actionNext". It is always shows done in soft keyboard. So I removed the digits and I am using android:inputType="textCapCharacters" in XML and want to use INPUT FILTERS to restrict the characters programmatically. How do I do that?
Is it possible? if so how to use INPUT FILTERS to restrict only "ABCDEFGHIJKLMNOPQRSTUVWXYZ0123456789 "?
Try this one
InputFilter filter = new InputFilter() {
public CharSequence filter(CharSequence source, int start, int end,
Spanned dest, int dstart, int dend) {
if(source.length() > 10) return "";
else{
for (int i = start; i < end; i++) {
if (!Character.isLetterOrDigit(source.charAt(i)) && !Character.isSpaceChar(source.charAt(i))) {
return "";
}
}
}
return null;
}
};
Then set it to you editext
myEditxt.setFilters(new InputFilter[] { filter });
Add this in string.xml
<string name="my_regex">ABCDEFGHIJKLMNOPQRSTUVWXYZ0123456789</string>
In XML :
<EditText
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:digits="#string/my_regex"
/>
i have the following problem to resolve in an Android App. I have an editText which has to show only numbers and the the letters 'x' and 'c' when the keyboard is prompted. Is this possible? Thanks for the help!
Sure you can, with filters using InputFilter.
Here a piece of sample code:
InputFilter filter = new InputFilter()
{
public CharSequence filter(CharSequence source, int start, int end, Spanned dest, int dstart, int dend)
{
for (int i = start; i < end; i++)
{
if (Character.isDigit(source.charAt(i)) || (source.charAt(i) == 'x') || (source.charAt(i) == 'c'))
{
return "";
}
}
return null;
}
};
editText.setFilters(new InputFilter[] { filter });
You have to build your own keyboard or you can restrict input in such a way:
<EditText
android:inputType="text"
android:digits="0,1,2,3,4,5,6,7,8,9,xc" />
try below properties for your EditText
Example :
Alphabet
android:inputType="text" // for alphabet
you can put your own combination of digits
android:digits="0,1,2,3,4,5,6,7,8,9,*,xc" // you can put your own combination of digits
Alphanumeric
android:digits="0123456789 abcdefghijklmnopqrstuvwxyz ABCDEFGHIJKLMNOPQRSTUVWXYZ"
Numeric
input.setRawInputType(Configuration.KEYBOARD_12KEY); // its show only the numeric keyboard.
I have a edittext which should allow 24 hour format time mean 00:00 to 23:59
Only two checking is left
1. hh should not be greater than 23 and mm should not be grater than 59 I need to check this when user is typing or moved to another edit text.
2. is should have only one (min and max) : sign
I am creating this edit text dynamically code follows
final EditText timeVisited = new EditText(this);
timeVisited.setId(20);
timeVisited.setText(Tm);
timeVisited.setTextColor(Color.BLACK);
timeVisited.setTextSize(TypedValue.COMPLEX_UNIT_SP, 12);
timeVisited.setHint("eg. 14:30 for 2:30 PM");
timeVisited.setPadding(5,5,5,5);
timeVisited.setSingleLine(false);
timeVisited.setLines(1);
timeVisited.setBackgroundResource(R.drawable.text_bg);
customerToCatchTblRow.addView(timeVisited);// add the column to the table row here
LinearLayout.LayoutParams params5 = (LinearLayout.LayoutParams)timeVisited.getLayoutParams();
params5.setMargins(0, 0, 5, 0); //substitute parameters for left, top, right, bottom
timeVisited.setLayoutParams(params5);
//it checks max input is 5
int maxLength = 5;
InputFilter[] FilterArray = new InputFilter[1];
FilterArray[0] = new InputFilter.LengthFilter(maxLength);
timeVisited.setFilters(FilterArray);
//It allow only numbers and :
InputFilter filter = new InputFilter()
{
#Override
public CharSequence filter(CharSequence source, int start, int end,Spanned dest, int dstart, int dend)
{
for (int i = start; i < end; i++)
{
if (!Character.isDigit(source.charAt(i))&& source.charAt(i) != ':')
{
return "";
}
}
return null;
}
};
timeVisited.setFilters(new InputFilter[]{filter});
one way to do it is to split the source variable using ':' as delimiter which will return you an array. Now check for array size, if it is bigger than 2 then the source has more than two ':' . If not, then check if array[0] is less than 23 and array[1] is less than 59.
The code should be like: (assuming source to be the variable to parse, isInt checks if a string is an integer; split splits a string based on a delimiter)
var arr = source.split(':');
if(arr.length>2)return false;
if( isInt(arr[0]) && isInt(arr[1]) && arr[0]<23 && arr[1]<59)return true;
return false;
Hope this will be helpful
I have a EditText , and I would like to restrict the number of characters which could be inputted in this EditText, and make this restriction programmatically, how to do it? For example, say I would like to restrict it to only allow 10 characters.
You can Use InputFilter for restricting the number of characters in EditView programmatically as:
InputFilter[] FilterArray = new InputFilter[1];
FilterArray[0] = new InputFilter.LengthFilter(10);
your_edittext.setFilters(FilterArray);
for more help you can see this tutorial for restricting number of characters in EditView:
http://www.tutorialforandroid.com/2009/02/maxlength-in-edittext-using-codes.html
I would implement a filter:
InputFilter filter = new InputFilter() {
#Override
public CharSequence filter(CharSequence source, int start, int end, Spanned dest, int dstart, int dend) {
if (source.length > 10){
//cancel the edit or whatever
}
}
};
EditText editText = (EditText) findViewById(R.id.rg);
editText.setFilters(new InputFilter[] {filter});
public void setEditTextMaxLength(int length) {
InputFilter[] FilterArray = new InputFilter[1];
FilterArray[0] = new InputFilter.LengthFilter(length);
edt_text.setFilters(FilterArray);
}
Try this my friend easy game easy life
InputFilter[] FilterArray = new InputFilter[1];
FilterArray[0] = new InputFilter.LengthFilter(5);
input.setFilters(FilterArray);
What's the best way to limit the text length of an EditText in Android?
Is there a way to do this via xml?
Documentation
Example
android:maxLength="10"
use an input filter to limit the max length of a text view.
TextView editEntryView = new TextView(...);
InputFilter[] filterArray = new InputFilter[1];
filterArray[0] = new InputFilter.LengthFilter(8);
editEntryView.setFilters(filterArray);
EditText editText = new EditText(this);
int maxLength = 3;
editText.setFilters(new InputFilter[] {new InputFilter.LengthFilter(maxLength)});
A note to people who are already using a custom input filter and also want to limit the max length:
When you assign input filters in code all previously set input filters are cleared, including one set with android:maxLength. I found this out when attempting to use a custom input filter to prevent the use of some characters that we don't allow in a password field. After setting that filter with setFilters the maxLength was no longer observed. The solution was to set maxLength and my custom filter together programmatically. Something like this:
myEditText.setFilters(new InputFilter[] {
new PasswordCharFilter(), new InputFilter.LengthFilter(20)
});
I have had this problem and I consider we are missing a well explained way of doing this programmatically without losing the already set filters.
Setting the length in XML:
As the accepted answer states correctly, if you want to define a fixed length to an EditText which you won't change further in the future just define in your EditText XML:
android:maxLength="10"
Setting the length programmatically
To set the length programmatically you'll need to set it through an InputFilter. But if you create a new InputFilter and set it to the EditText you will lose all the other already defined filters (e.g. maxLines, inputType, etc) which you might have added either through XML or programatically.
So this is WRONG:
editText.setFilters(new InputFilter[] {new InputFilter.LengthFilter(maxLength)});
To avoid losing previously added filters you need to get those filters, add the new one (maxLength in this case), and set the filters back to the EditText as follow:
Java
InputFilter[] editFilters = editText.getFilters();
InputFilter[] newFilters = new InputFilter[editFilters.length + 1];
System.arraycopy(editFilters, 0, newFilters, 0, editFilters.length);
newFilters[editFilters.length] = new InputFilter.LengthFilter(maxLength);
editText.setFilters(newFilters);
Kotlin however made it easier for everyone, you also need to add the filter to the already existing ones but you can achieve that with a simple:
editText.filters += InputFilter.LengthFilter(maxLength)
TextView tv = new TextView(this);
tv.setFilters(new InputFilter[]{ new InputFilter.LengthFilter(250) });
For anyone else wondering how to achieve this, here is my extended EditText class EditTextNumeric.
.setMaxLength(int) - sets maximum number of digits
.setMaxValue(int) - limit maximum integer value
.setMin(int) - limit minimum integer value
.getValue() - get integer value
import android.content.Context;
import android.text.InputFilter;
import android.text.InputType;
import android.widget.EditText;
public class EditTextNumeric extends EditText {
protected int max_value = Integer.MAX_VALUE;
protected int min_value = Integer.MIN_VALUE;
// constructor
public EditTextNumeric(Context context) {
super(context);
this.setInputType(InputType.TYPE_CLASS_NUMBER);
}
// checks whether the limits are set and corrects them if not within limits
#Override
protected void onTextChanged(CharSequence text, int start, int before, int after) {
if (max_value != Integer.MAX_VALUE) {
try {
if (Integer.parseInt(this.getText().toString()) > max_value) {
// change value and keep cursor position
int selection = this.getSelectionStart();
this.setText(String.valueOf(max_value));
if (selection >= this.getText().toString().length()) {
selection = this.getText().toString().length();
}
this.setSelection(selection);
}
} catch (NumberFormatException exception) {
super.onTextChanged(text, start, before, after);
}
}
if (min_value != Integer.MIN_VALUE) {
try {
if (Integer.parseInt(this.getText().toString()) < min_value) {
// change value and keep cursor position
int selection = this.getSelectionStart();
this.setText(String.valueOf(min_value));
if (selection >= this.getText().toString().length()) {
selection = this.getText().toString().length();
}
this.setSelection(selection);
}
} catch (NumberFormatException exception) {
super.onTextChanged(text, start, before, after);
}
}
super.onTextChanged(text, start, before, after);
}
// set the max number of digits the user can enter
public void setMaxLength(int length) {
InputFilter[] FilterArray = new InputFilter[1];
FilterArray[0] = new InputFilter.LengthFilter(length);
this.setFilters(FilterArray);
}
// set the maximum integer value the user can enter.
// if exeeded, input value will become equal to the set limit
public void setMaxValue(int value) {
max_value = value;
}
// set the minimum integer value the user can enter.
// if entered value is inferior, input value will become equal to the set limit
public void setMinValue(int value) {
min_value = value;
}
// returns integer value or 0 if errorous value
public int getValue() {
try {
return Integer.parseInt(this.getText().toString());
} catch (NumberFormatException exception) {
return 0;
}
}
}
Example usage:
final EditTextNumeric input = new EditTextNumeric(this);
input.setMaxLength(5);
input.setMaxValue(total_pages);
input.setMinValue(1);
All other methods and attributes that apply to EditText, of course work too.
Xml
android:maxLength="10"
Java:
InputFilter[] editFilters = editText.getFilters();
InputFilter[] newFilters = new InputFilter[editFilters.length + 1];
System.arraycopy(editFilters, 0, newFilters, 0, editFilters.length);
newFilters[editFilters.length] = new InputFilter.LengthFilter(maxLength);
editText.setFilters(newFilters);
Kotlin:
editText.filters += InputFilter.LengthFilter(maxLength)
Due to goto10's observation, I put together the following code to protected against loosing other filters with setting the max length:
/**
* This sets the maximum length in characters of an EditText view. Since the
* max length must be done with a filter, this method gets the current
* filters. If there is already a length filter in the view, it will replace
* it, otherwise, it will add the max length filter preserving the other
*
* #param view
* #param length
*/
public static void setMaxLength(EditText view, int length) {
InputFilter curFilters[];
InputFilter.LengthFilter lengthFilter;
int idx;
lengthFilter = new InputFilter.LengthFilter(length);
curFilters = view.getFilters();
if (curFilters != null) {
for (idx = 0; idx < curFilters.length; idx++) {
if (curFilters[idx] instanceof InputFilter.LengthFilter) {
curFilters[idx] = lengthFilter;
return;
}
}
// since the length filter was not part of the list, but
// there are filters, then add the length filter
InputFilter newFilters[] = new InputFilter[curFilters.length + 1];
System.arraycopy(curFilters, 0, newFilters, 0, curFilters.length);
newFilters[curFilters.length] = lengthFilter;
view.setFilters(newFilters);
} else {
view.setFilters(new InputFilter[] { lengthFilter });
}
}
//Set Length filter. Restricting to 10 characters only
editText.setFilters(new InputFilter[]{new InputFilter.LengthFilter(MAX_LENGTH)});
//Allowing only upper case characters
editText.setFilters(new InputFilter[]{new InputFilter.AllCaps()});
//Attaching multiple filters
editText.setFilters(new InputFilter[]{new InputFilter.LengthFilter(MAX_LENGTH), new InputFilter.AllCaps()});
Another way you can achieve this is by adding the following definition to the XML file:
<EditText
android:id="#+id/input"
android:layout_width="0dp"
android:layout_height="wrap_content"
android:inputType="number"
android:maxLength="6"
android:hint="#string/hint_gov"
android:layout_weight="1"/>
This will limit the maximum length of the EditText widget to 6 characters.
XML
android:maxLength="10"
Programmatically:
int maxLength = 10;
InputFilter[] filters = new InputFilter[1];
filters[0] = new InputFilter.LengthFilter(maxLength);
yourEditText.setFilters(filters);
Note: internally, EditText & TextView parse the value of android:maxLength in XML and use InputFilter.LengthFilter() to apply it.
See: TextView.java#L1564
From material.io, you can use TextInputEditText combined with TextInputLayout:
<com.google.android.material.textfield.TextInputLayout
android:layout_width="match_parent"
android:layout_height="wrap_content"
app:counterEnabled="true"
app:counterMaxLength="1000"
app:passwordToggleEnabled="false">
<com.google.android.material.textfield.TextInputEditText
android:id="#+id/edit_text"
android:hint="#string/description"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:maxLength="1000"
android:gravity="top|start"
android:inputType="textMultiLine|textNoSuggestions"/>
</com.google.android.material.textfield.TextInputLayout>
You can configure a password EditText with drawable:
Or you can limit text length with/without a counter:
Dependency:
implementation 'com.google.android.material:material:1.1.0-alpha02'
Kotlin:
edit_text.filters += InputFilter.LengthFilter(10)
ZTE Blade A520 has strange effect. When you type more than 10 symbols (for instance, 15), EditText shows first 10, but other 5 are not visible and not accessible. But when you delete symbols with Backspace, it first deletes right 5 symbols and then removes remaining 10. To overcome this behaviour use a solution:
android:inputType="textNoSuggestions|textVisiblePassword"
android:maxLength="10"
or this:
android:inputType="textNoSuggestions"
or this, if you want to have suggestions:
private class EditTextWatcher(private val view: EditText) : TextWatcher {
private var position = 0
private var oldText = ""
override fun afterTextChanged(s: Editable?) = Unit
override fun beforeTextChanged(s: CharSequence?, start: Int, count: Int, after: Int) {
oldText = s?.toString() ?: ""
position = view.selectionStart
}
override fun onTextChanged(s: CharSequence?, start: Int, before: Int, count: Int) {
val newText = s?.toString() ?: ""
if (newText.length > 10) {
with(view) {
setText(oldText)
position = if (start > 0 && count > 2) {
// Text paste in nonempty field.
start
} else {
if (position in 1..10 + 1) {
// Symbol paste in the beginning or middle of the field.
position - 1
} else {
if (start > 0) {
// Adding symbol to the end of the field.
start - 1
} else {
// Text paste in the empty field.
0
}
}
}
setSelection(position)
}
}
}
}
// Usage:
editTextWatcher = EditTextWatcher(view.edit_text)
view.edit_text.addTextChangedListener(editTextWatcher)
This is a custom EditText Class that allow Length filter to live along with other filters.
Thanks to Tim Gallagher's Answer (below)
import android.content.Context;
import android.text.InputFilter;
import android.util.AttributeSet;
import android.widget.EditText;
public class EditTextMultiFiltering extends EditText{
public EditTextMultiFiltering(Context context) {
super(context);
}
public EditTextMultiFiltering(Context context, AttributeSet attrs) {
super(context, attrs);
}
public EditTextMultiFiltering(Context context, AttributeSet attrs, int defStyleAttr) {
super(context, attrs, defStyleAttr);
}
public void setMaxLength(int length) {
InputFilter curFilters[];
InputFilter.LengthFilter lengthFilter;
int idx;
lengthFilter = new InputFilter.LengthFilter(length);
curFilters = this.getFilters();
if (curFilters != null) {
for (idx = 0; idx < curFilters.length; idx++) {
if (curFilters[idx] instanceof InputFilter.LengthFilter) {
curFilters[idx] = lengthFilter;
return;
}
}
// since the length filter was not part of the list, but
// there are filters, then add the length filter
InputFilter newFilters[] = new InputFilter[curFilters.length + 1];
System.arraycopy(curFilters, 0, newFilters, 0, curFilters.length);
newFilters[curFilters.length] = lengthFilter;
this.setFilters(newFilters);
} else {
this.setFilters(new InputFilter[] { lengthFilter });
}
}
}
it simple way in xml:
android:maxLength="4"
if u require to set 4 character in xml edit-text so,use this
<EditText
android:id="#+id/edtUserCode"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:maxLength="4"
android:hint="Enter user code" />
Try this for Java programmatically:
myEditText(new InputFilter[] {new InputFilter.LengthFilter(CUSTOM_MAX_LEN)});
it simple way in xml:
android:maxLength="#{length}"
for setting it programmatically you can use the following function
public static void setMaxLengthOfEditText(EditText editText, int length) {
InputFilter[] filters = editText.getFilters();
List arrayList = new ArrayList();
int i2 = 0;
if (filters != null && filters.length > 0) {
int filtersSize = filters.length;
int i3 = 0;
while (i2 < filtersSize) {
Object obj = filters[i2];
if (obj instanceof LengthFilter) {
arrayList.add(new LengthFilter(length));
i3 = 1;
} else {
arrayList.add(obj);
}
i2++;
}
i2 = i3;
}
if (i2 == 0) {
arrayList.add(new LengthFilter(length));
}
if (!arrayList.isEmpty()) {
editText.setFilters((InputFilter[]) arrayList.toArray(new InputFilter[arrayList.size()]));
}
}
This works fine...
android:maxLength="10"
this will accept only 10 characters.
I had saw a lot of good solutions, but I'd like to give a what I think as more complete and user-friendly solution, which include:
1, Limit length.
2, If input more, give a callback to trigger your toast.
3, Cursor can be at middle or tail.
4, User can input by paste a string.
5, Always discard overflow input and keep origin.
public class LimitTextWatcher implements TextWatcher {
public interface IF_callback{
void callback(int left);
}
public IF_callback if_callback;
EditText editText;
int maxLength;
int cursorPositionLast;
String textLast;
boolean bypass;
public LimitTextWatcher(EditText editText, int maxLength, IF_callback if_callback) {
this.editText = editText;
this.maxLength = maxLength;
this.if_callback = if_callback;
}
#Override
public void beforeTextChanged(CharSequence s, int start, int count, int after) {
if (bypass) {
bypass = false;
} else {
StringBuilder stringBuilder = new StringBuilder();
stringBuilder.append(s);
textLast = stringBuilder.toString();
this.cursorPositionLast = editText.getSelectionStart();
}
}
#Override
public void onTextChanged(CharSequence s, int start, int before, int count) {
}
#Override
public void afterTextChanged(Editable s) {
if (s.toString().length() > maxLength) {
int left = maxLength - s.toString().length();
bypass = true;
s.clear();
bypass = true;
s.append(textLast);
editText.setSelection(this.cursorPositionLast);
if (if_callback != null) {
if_callback.callback(left);
}
}
}
}
edit_text.addTextChangedListener(new LimitTextWatcher(edit_text, MAX_LENGTH, new LimitTextWatcher.IF_callback() {
#Override
public void callback(int left) {
if(left <= 0) {
Toast.makeText(MainActivity.this, "input is full", Toast.LENGTH_SHORT).show();
}
}
}));
What I failed to do is, if user highlight a part of the current input and try to paste an very long string, I don't know how to restore the highlight.
Such as, max length is set to 10, user inputed '12345678', and mark '345' as highlight, and try to paste a string of '0000' which will exceed limitation.
When I try to use edit_text.setSelection(start=2, end=4) to restore origin status, the result is, it just insert 2 space as '12 345 678', not the origin highlight. I'd like someone solve that.
You can use android:maxLength="10" in the EditText.(Here the limit is upto 10 characters)
I was using "maxLength" but it didn't work for me. So, based on my experience, I tried a few things.
And I detected the problem.
I must declare the id.
Then:
android:id="#+id/editTextTest"
android:maxLength="10"