如果你想替换你的表情,试试这个:
EditText et = new EditText(this);
et.setTextSize(24);
et.setHint("this view shows \":)\" as an emoticon, try to type \":)\" somewhere");
final Bitmap smile = BitmapFactory.decodeResource(getResources(), R.drawable.emo_im_happy);
final Pattern pattern = Pattern.compile(":\\)");
TextWatcher watcher = new TextWatcher() {
boolean fastReplace = true;
@Override
public void onTextChanged(CharSequence s, int start, int before, int count) {
//Log.d(TAG, "onTextChanged " + start + " " + before + " " + count);
if (fastReplace) {
if (start > 0 && count > 0) {
String sub = s.subSequence(start - 1, start + 1).toString();
if (sub.equals(":)")) {
Spannable spannable = (Spannable) s;
ImageSpan smileSpan = new ImageSpan(smile);
spannable.setSpan(smileSpan, start-1, start+1, Spannable.SPAN_EXCLUSIVE_EXCLUSIVE);
}
}
} else {
Spannable spannable = (Spannable) s;
Matcher matcher = pattern.matcher(s);
while (matcher.find()) {
int mstart = matcher.start();
int mend = matcher.end();
ImageSpan[] spans = spannable.getSpans(mstart, mend, ImageSpan.class);
Log.d(TAG, "onTextChanged " + mstart + " " + mend + " " + spans.length);
if (spans.length == 0) {
ImageSpan smileSpan = new ImageSpan(smile);
spannable.setSpan(smileSpan, mstart, mend, Spannable.SPAN_EXCLUSIVE_EXCLUSIVE);
}
}
}
Log.d(TAG, "onTextChanged " + s);
}
@Override
public void beforeTextChanged(CharSequence s, int start, int count, int after) {
}
@Override
public void afterTextChanged(Editable s) {
Log.d(TAG, "afterTextChanged " + s);
}
};
et.addTextChangedListener(watcher );
setContentView(et);
在这里,如果fastReplace == true
您不必扫描整个文本,但这只是最小的实现:仅当您在输入“:”之后立即输入“)”时才有效,如果fastReplace == false
它用笑脸替换每次出现的“:)”但它必须扫描整个文本,因此当文本很大时速度会慢一些