我有一个EditText
包裹着TextInputLayout
- 这将获得组织的使命/愿景。
TextInputLayout
将通知剩余的字数,如果遇到空格,它将拆分字符串。
问题在于它不计算单词,而是计算字符数。
这是我的示例代码:
appCompatEditTextEventThirdContents.addTextChangedListener(new TextWatcher() {
@Override
public void beforeTextChanged(CharSequence s, int start, int count, int after) {
}
@Override
public void onTextChanged(CharSequence s, int start, int before, int count) {
}
@Override
public void afterTextChanged(Editable s) {
final int maxWords = 500;
String[] words = s.toString().split(" ");
int currentWords = words.length;
try{
if (currentWords < maxWords) {
appCompatEditTextEventThirdContents.setHint("Third Paragraph " + (maxWords - currentWords) + "left");
}
else if (currentWords >= maxWords ){
appCompatEditTextEventThirdContents.setHint("Exceeded 500 words.");
}
}catch (NumberFormatException e){
e.printStackTrace();
}
}
});
这是我的布局视图。
<!--THIRD PARAGRAPH-->
<android.support.design.widget.TextInputLayout
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:id="@+id/textInputThirdEventParag"
android:hint="@string/paragThird"
android:layout_below="@+id/textInputSecondEventParag"
android:layout_centerHorizontal="true">
<android.support.v7.widget.AppCompatEditText
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:id="@+id/editTextPG3"
android:scrollbars="vertical|horizontal"
android:minLines="5"
android:maxLines="10"
android:maxLength="500"
android:singleLine="false"/>
</android.support.design.widget.TextInputLayout>
我基于拆分字符串here。
答案 0 :(得分:1)
属性maxLength
限制EditText
中的字符。因此,在您的情况下,您需要删除该属性。您还需要删除maxLines
属性。
<android.support.v7.widget.AppCompatEditText
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:id="@+id/editTextPG3"
android:scrollbars="vertical|horizontal"
android:minLines="5"
android:singleLine="false"/>
现在,您需要InputFilter
和TextWatcher
来设置最大字数限制。
像这样准备你的InputFilter
。
private InputFilter mInputFilter;
// Helping functions to dynamically add or remove filters from your EditText
private void forceFilter(EditText mEditText, int charCount) {
mInputFilter = new InputFilter.LengthFilter(charCount);
mEditText.setFilters(new InputFilter[] { mInputFilter });
}
private void removeFilter(EditText mEditText) {
if (mEditText != null) {
mEditText.setFilters(new InputFilter[0]);
mInputFilter = null;
}
}
现在声明一个函数来获取字数
private int getWordsCount(String input) {
String trim = input.trim();
if (trim.isEmpty())
return 0;
return trim.split("\\s+").length; // Separate string by spaces
}
现在,您必须添加TextWatcher
来动态添加或删除InputFilter
周围的EditText
。
private final int MAX_WORD_LIMIT = 500;
private EditText mEditText = (EditText) findViewById(R.id.your_edit_text);
appCompatEditTextEventThirdContents.addTextChangedListener(new TextWatcher() {
@Override
public void beforeTextChanged(CharSequence s, int start, int count, int after) {
int totalWordCount = getWordCount(s.toString());
// totalWordCount = 0 means a new word is going to start
if (count == 0 && totalWordCount >= MAX_WORD_LIMIT) {
forceFilter(mEditText, mEditText.getText().length());
appCompatEditTextEventThirdContents.setHint("Exceeded 500 words.");
} else {
removeFilter(mEditText);
appCompatEditTextEventThirdContents.setHint("Third Paragraph " + (maxWords - currentWords) + "left");
}
}
@Override
public void onTextChanged(CharSequence s, int start, int before, int count) {}
@Override
public void afterTextChanged(Editable s) {}
});
您无法使用此处理粘贴事件中的最大字数。如果您想过滤粘贴事件,也可以查看here。