InputFilterEditTextDEmo 过滤特殊字符，空格，emoji的EditText

package nida.com.inputfilteredittextdemo; import android.content.Context; import android.support.v7.widget.AppCompatEditText; import android.text.Editable; import android.text.InputFilter; import android.text.Spanned; import android.text.TextWatcher; import android.util.AttributeSet; import android.widget.Toast; import java.util.regex.Matcher; import java.util.regex.Pattern; /** * Created by ljx. * Date 2017/8/21 14:22 * Description: */ public class InputFilterEditText extends AppCompatEditText { private Context mContext; private EmojiFilter mEmojiFilter; private IEditTextLengthChangeListener listener; private MaxTextLengthFilter lengthFilter; public InputFilterEditText(Context context) { super(context); this.mContext = context; initEditText(); } public InputFilterEditText(Context context, AttributeSet attrs) { super(context, attrs); this.mContext = context; initEditText(); } public InputFilterEditText(Context context, AttributeSet attrs, int defStyleAttr) { super(context, attrs, defStyleAttr); this.mContext = context; initEditText(); } private void initEditText() { mEmojiFilter = new EmojiFilter(); lengthFilter = new MaxTextLengthFilter(mContext, 15); //必须放在前面，放在addTextChangedListener中间会导致第一次的空格等不能进行过滤 setFilters(new InputFilter[]{strFilter, mEmojiFilter, lengthFilter}); 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) { if (listener != null) { listener.textLength(s); } } @Override public void afterTextChanged(Editable s) { } }); } public void setEditTextLengthChangeListener(IEditTextLengthChangeListener listener) { this.listener = listener; } /** * 仅仅过滤空格 */ InputFilter emptyFilter = new InputFilter() { @Override public CharSequence filter(CharSequence source, int start, int end, Spanned dest, int dstart, int dend) { if (source.toString().endsWith(" ")) { return dest.subSequence(dstart, dend); } else { return null; } } }; /** * 过滤非法字符以及空白符，包括空格换行符等。 */ InputFilter strFilter = new InputFilter() { @Override public CharSequence filter(CharSequence source, int start, int end, Spanned dest, int dstart, int dend) { String speChat = "[`~!@#$%^&*()+=|{}':;',\\[\\].<>/?~！@#￥%……&*（）——+|{}【】‘；：”“’。，、？\"£€]|\\s"; Pattern pattern = Pattern.compile(speChat); Matcher matcher = pattern.matcher(source.toString()); if (matcher.find()) { Toast.makeText(mContext, "lalla", Toast.LENGTH_LONG).show(); return dest.subSequence(dstart, dend); } else { return null; } } }; public interface IEditTextLengthChangeListener { void textLength(CharSequence s); } }