仿知乎EditText 输入@+用户名效果

来源：互联网发布：origin8软件编辑：程序博客网时间：2024/05/29 14:40

et_content.setOnKeyListener(new EditKeyListener());

private class EditKeyListener implements View.OnKeyListener{    @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 = et_content.getSelectionStart();            int lastPos = 0;            int l = 0;            for (int i = 0; i < be.size(); i++) { //循环遍历整个输入框的所有字符                if ((lastPos = et_content.getText().toString().indexOf("@"+be.get(i).getRealName(), lastPos)) != -1) {                    if (selectionStart != 0 && selectionStart >= lastPos && selectionStart <= (lastPos + ("@"+be.get(i).getRealName()).length())) {                        String sss = et_content.getText().toString();                        String s1 = sss.substring(0, lastPos);                        String s2 = sss.substring(lastPos +("@"+ be.get(i).getRealName()).length());                        String s3 = s1+s2;                        be.remove(i); //删除对应实体                        et_content.setText(s3);                        for (int j = 0; j <be.size() ; j++) {                            if(s3.contains("@"+ be.get(j).getRealName())){                                SpannableString ss = new SpannableString(s3);                                ss.setSpan(new ForegroundColorSpan(AskAcktivity.this.getResources()                                        .getColor(R.color.title_bar_bg)), 0,                                        l+("@"+ be.get(j).getRealName()).length()+1, Spannable.SPAN_EXCLUSIVE_EXCLUSIVE);                                et_content.setText(ss); //字符串替换，删掉符合条件的字符串                                l += ("@"+ be.get(j).getRealName()).length();                            }else{                                et_content.setText(s3);                            }                        }                        et_content.setMovementMethod(LinkMovementMethod.getInstance());                        et_content.setSelection(lastPos); //设置光标位置                        return true;                    }                } else {                    lastPos += ("@" + be.get(i).getRealName()).length();                }            }        }        return false;    }}

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