过滤输入法的表情

所以为了防止用户胡乱输入表情、同时限制用户只能输入应用自带的表情。编写了一个自定义控件来禁止输入的表情。

代码如下：

[java]
view plaincopy





package com.qd.widget;

import android.content.Context;
import android.text.InputFilter;
import android.text.SpannableString;
import android.text.Spanned;
import android.text.TextUtils;
import android.util.AttributeSet;
import android.widget.EditText;

/**
* 过滤搜狗输入法或其他输入法 当中的图片或其他非法字符
*
* 暂时仅过滤了部分常用的表情字符
*
* @author QD
*
*/

public class MyEditText extends EditText {

int maxLength = -1;

public MyEditText(Context context, AttributeSet attrs, int defStyle) {
super(context, attrs, defStyle);
addListener(attrs);
}

public MyEditText(Context context, AttributeSet attrs) {
super(context, attrs);
addListener(attrs);
}

public MyEditText(Context context) {
super(context);
addListener(null);
}

private void addListener(AttributeSet attrs) {
if (attrs != null)
maxLength = attrs.getAttributeIntValue("http://schemas.android.com/apk/res/android", "maxLength", -1);
// 过滤输入法表情
InputFilter filter = new InputFilter() {
@Override
public CharSequence filter(CharSequence source, int start, int end, Spanned dest, int dstart, int dend) {
StringBuffer buffer = new StringBuffer();
for (int i = start; i < end; i++) {
char c = source.charAt(i);
// 第一个字符为以下时，过滤掉
if (c == 55356 || c == 55357 || c == 10060 || c == 9749 || c == 9917 || c == 10067 || c == 10024
|| c == 11088 || c == 9889 || c == 9729 || c == 11093 || c == 9924) {
i++;
continue;
} else {
buffer.append(c);
}
}
if (source instanceof Spanned) {
SpannableString sp = new SpannableString(buffer);
TextUtils.copySpansFrom((Spanned) source, start, end, null, sp, 0);
return sp;
} else {
return buffer;
}
}
};
// 输入框长度限制
if (maxLength > 0)
setFilters(new InputFilter[] { filter, new InputFilter.LengthFilter(maxLength) });
else
setFilters(new InputFilter[] { filter });
}
}