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技術社區[雲棲]
The method setFilters(InputFilter[]) in the type Editable is not applicable
解決辦法：
EditText mEdit = (EditText)findViewById(R.id.mEdit);
InputFilter[] filters = {new AdnNameLengthFilter()};
mEdit.setFilters(filters);
public static class AdnNameLengthFilter implements InputFilter
{
private int nMax;
public CharSequence filter (CharSequence source, int start, int end, Spanned dest, int dstart, int dend)
{
Log.w("Android_12", "source("+start+","+end+")="+source+",dest("+dstart+","+dend+")="+dest);
if(isChinese(dest.toString())|| isChinese(source.toString()))
{
nMax = LENGTH_ZNAME;
}else
{
nMax =LENGTH_ENAME;
}
int keep = nMax - (dest.length() - (dend - dstart));
if (keep <= 0) {
return "";
} else if (keep >= end - start) {
return null; // keep original
} else {
return source.subSequence(start, start + keep);
}
}
}
其中的isChinese函數是判斷是否字符串中是否包含中文字符，具體實現方法就不再贅述了。
LENGTH_ZNAME : 是中文模式下允許輸入的最大字符數。
LENGTH_ENAME：是純英文模式下允許輸入的最大字符數。
判斷漢字的方法private boolean isChinese(char c) {
Character.UnicodeBlock ub = Character.UnicodeBlock.of(c);
if (ub == Character.UnicodeBlock.CJK_UNIFIED_IDEOGRAPHS
|| ub == Character.UnicodeBlock.CJK_COMPATIBILITY_IDEOGRAPHS
|| ub == Character.UnicodeBlock.CJK_UNIFIED_IDEOGRAPHS_EXTENSION_A
|| ub == Character.UnicodeBlock.GENERAL_PUNCTUATION
|| ub == Character.UnicodeBlock.CJK_SYMBOLS_AND_PUNCTUATION
|| ub == Character.UnicodeBlock.HALFWIDTH_AND_FULLWIDTH_FORMS) {
return true;
}
return false;
}
數字就根據unicode的範圍判斷吧！
方法一：利用TextWatcher
editText.addTextChangedListener(new TextWatcher() {
private CharSequence temp;
private boolean isEdit = true;
private int selectionStart ;
private int selectionEnd ;
@Override
public void beforeTextChanged(CharSequence s, int arg1, int arg2,
int arg3) {
temp = s;
}
@Override
public void onTextChanged(CharSequence s, int arg1, int arg2,
int arg3) {
}
@Override
public void afterTextChanged(Editable s) {
selectionStart = editText.getSelectionStart();
selectionEnd = editText.getSelectionEnd();
Log.i("gongbiao1",""+selectionStart);
if (temp.length() > Constant.TEXT_MAX) {
Toast.makeText(KaguHomeActivity.this,
R.string.edit_content_limit, Toast.LENGTH_SHORT)
.show();
s.delete(selectionStart-1, selectionEnd);
int tempSelection = selectionStart;
editText.setText(s);
editText.setSelection(tempSelection);
}
}
});
private TextWatcher mTextWatcher = new TextWatcher(){
Toast mToast = null;
public void beforeTextChanged(CharSequence s, int start,
int count,int after) {
}
public void onTextChanged(CharSequence s, int start,
int before,int count) {
}
public void afterTextChanged(Editable s) {
int nSelStart = 0;
int nSelEnd = 0;
boolean nOverMaxLength = false;
nSelStart = mEditText.getSelectionStart();
nSelEnd = mEditText.getSelectionEnd();
nOverMaxLength = (s.length() > Constants.MAX_TEXT_INPUT_LENGTH) ? true : false;
if(nOverMaxLength){
if(null == mToast){
mToast = Toast.makeText(mContext,
R.string.IDS_MSG_TEXT_OVER_MAXLENGTH,
Toast.LENGTH_SHORT);
}
mToast.show();
s.delete(nSelStart - 1, nSelEnd);
mEditText.setTextKeepState(s);//請讀者注意這一行，保持光標原先的位置，而 mEditText.setText(s)會讓光標跑到最前麵，
//就算是再加mEditText.setSelection(nSelStart) 也不起作用
}
}
};
方法二：利用InputFilter
editText.setFilters(new InputFilter[]{new InputFilter.LengthFilter(100)}); //其中100最大輸入字數
editText.setFilters(new InputFilter[]{new InputFilter.LengthFilter(100)}); //其中100最大輸入字數
方法三：在XML中設定
Xml代碼
<EditText
.
.
.
Android:maxLength="100"
/>
=========================================================
方法二：
利用EditText可以設置filter的特性，自定義一個LengthFilter，當輸入字數超過限製時 ，做出自定義的提示
// 輸入框限製輸入字數
InputFilter[] filters = new InputFilter[1];
filters[0] = new InputFilter.LengthFilter(Constant.TEXT_MAX) {
@Override
public CharSequence filter(CharSequence source, int start, int end,
Spanned dest, int dstart, int dend) {
if (source.length() > 0 && dest.length() == Constant.TEXT_MAX) {
if ((System.currentTimeMillis() - toastTime) > interval) {
toastTime = System.currentTimeMillis();
Toast
.makeText(KaguHomeActivity.this,
R.string.edit_content_limit,
Toast.LENGTH_SHORT).show();
}
}
if (dest.toString().equals(
getResources().getString(R.string.input_default_txt))) {
Bundle data = new Bundle();
data.putCharSequence("source", source);
Message message = textHandler.obtainMessage();
message.setData(data);
message.sendToTarget();
}
return super.filter(source, start, end, dest, dstart, dend);
}
};
editText.setFilters(filters);
private Handler textHandler = new Handler() {
@Override
public void handleMessage(Message msg) {
Bundle data = msg.getData();
CharSequence source = data.getCharSequence("source");
editText.setTextColor(Color.BLACK);
editText.setText(source);
editText.setSelection(source.length());
}
};
最後更新：2017-04-04 07:03:42