EditText实现话题选择

来源：互联网发布：苹果电脑数据恢复编辑：程序博客网时间：2024/06/05 04:33

微博话题可哟重复选择多个但是优化之后每个话题只支持选择一次禁止用户输入＃

删除的时候以话题为整体进行删除

/**
* 给EditText设置删除监听事件
*
* @param v
* @param keyCode
* @param event
* @return
*/
@Override
public boolean onKey(View v, int keyCode, KeyEvent event) {
if (keyCode == KeyEvent.KEYCODE_DEL && event.getAction() == KeyEvent.ACTION_DOWN) {
//当为删除键并且是按下动作时执行
int selectionStart = etWriteSound.getSelectionStart() - 1;
int lastPos = 0;
for (int i = 0; i < topicBeanList.size(); i++) { //循环遍历整个输入框的所有字符
if ((lastPos = etWriteSound.getText().toString().indexOf(topicBeanList.get(i).getTopicName(), lastPos)) != -1) {
if (selectionStart != 0 && selectionStart >= lastPos && selectionStart <= (lastPos + topicBeanList.get(i).getTopicName()
.length() - 1)) {
String sss = etWriteSound.getText().toString();
String currentStr = sss.substring(0, lastPos) + sss
.substring(lastPos + topicBeanList.get(i).getTopicName().length()); //字符串替换，删掉符合条件的字符串
topicBeanList.remove(i); //删除对应实体
topicMap.clear();
for (int j = 0; j < topicBeanList.size(); j++) {
if (currentStr.contains(topicBeanList.get(j).getTopicName())) {
topicMap
.put(currentStr.indexOf(topicBeanList.get(j).getTopicName()), currentStr.indexOf(topicBeanList.get(j).
getTopicName()) + topicBeanList.get(j).getTopicName().length());
}
}
// 设置原有字符串的颜色
SpannableString spannableString = new SpannableString(currentStr);
for (Integer key : topicMap.keySet()) {
spannableString
.setSpan(new ForegroundColorSpan(Color.BLUE), key, topicMap.get(key), Spannable.SPAN_EXCLUSIVE_EXCLUSIVE);
}
etWriteSound.setText(spannableString);
etWriteSound.setSelection(lastPos); //设置光标位置
return true;
}
} else {
lastPos += ("#" + topicBeanList.get(i).getTopicName() + "#").length();
}
}
}
return false;
}

添加的时候进行话题的遍历将对应话题改变对应的颜色设置点击事件等等

@Override
public void onTextChanged(CharSequence s, int start, int before, int count) {
if (before == 0) {
if (TextUtils.equals(s.subSequence(start, s.toString().length()), "#")) {
etWriteSound.setText(s.subSequence(0, start));
etWriteSound.setSelection(start);
selectTopic();
}
}

}

@Override
public void afterTextChanged(Editable s) {
tvSoundWriteSize.setVisibility(View.VISIBLE);
soundSize = 200 - s.length();
// 获取输入数据的长度对长度进行限制
tvSoundWriteSize.setText(String.valueOf(soundSize));
if (soundSize < 0) {
tvSoundWriteSize.setTextColor(Color.RED);
} else {
tvSoundWriteSize.setTextColor(Color.BLACK);

}

}

// 设置原有字符串的颜色
SpannableString spannableString = new SpannableString(currentText + addTopic);
for (Integer key : topicMap.keySet()) {
spannableString
.setSpan(new ForegroundColorSpan(Color.BLUE), key, topicMap.get(key), Spannable.SPAN_EXCLUSIVE_EXCLUSIVE);
}
spannableString
.setSpan(new ForegroundColorSpan(Color.BLUE), currentText.length(), currentText.length() + addTopic.length(),
Spannable.SPAN_EXCLUSIVE_EXCLUSIVE);
etWriteSound.setText(spannableString);
topicBeanList.add(new TopicBean(addTopic, topicBean.getTopicId()));

etWriteSound.setSelection(etWriteSound.getText().toString().length());

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