RTEditor/src/main/java/com/onegravity/rteditor/converter/ConverterSpannedToHtml.java
private void escape(CharSequence text, int start, int end) {
        for (int i = start; i < end; i++) {
            char c = text.charAt(i);
            if (c == '\n') {
                mOut.append(BR);
            } else if (c == '<') {
                mOut.append(LT);
            } else if (c == '>') {
                mOut.append(GT);
            } else if (c == '&') {
                mOut.append(AMP);
            } else if (c == ' ') {
                while (i + 1 < end && text.charAt(i + 1) == ' ') {
                    mOut.append(NBSP);
                    i++;
                }
                mOut.append(' ');
            }
            // removed the c > 0x7E check to leave emoji unaltered
            else if (/*c > 0x7E || */c < ' ') {
                mOut.append("&#" + ((int) c) + ";");
            } else {
                mOut.append(c);
            }
        }
    }
private void escape(CharSequence text, int start, int end) {
        for (int i = start; i < end; i++) {
            char c = text.charAt(i);
            if (c == '\n') {
                mOut.append(BR);
            } else if (c == '<') {
                mOut.append(LT);
            } else if (c == '>') {
                mOut.append(GT);
            } else if (c == '&') {
                mOut.append(AMP);
            } else if (c == ' ') {
                while (i + 1 < end && text.charAt(i + 1) == ' ') {
                    mOut.append(NBSP);
                    i++;
                }
                mOut.append(' ');
            }
            // removed the c > 0x7E check to leave emoji unaltered
            else if (/*c > 0x7E || */c < ' ') {
                mOut.append("&#" + ((int) c) + ";");
            } else {
                mOut.append(c);
            }
        }
    }
private void escape ( CharSequence text , int start , int end ) { for ( int i = start ; i < end ; i ++ ) { char c = text . charAt ( i ) ; if ( c == ' ' ) { mOut . append ( BR ) ; } else if ( c == ' ' ) { mOut . append ( LT ) ; } else if ( c == ' ' ) { mOut . append ( GT ) ; } else if ( c == ' ' ) { mOut . append ( AMP ) ; } else if ( c == ' ' ) { while ( i + 1 < end && text . charAt ( i + 1 ) == ' ' ) { mOut . append ( NBSP ) ; i ++ ; } mOut . append ( ' ' ) ; } // removed the c > 0x7E check to leave emoji unaltered else if ( /*c > 0x7E || */ c < ' ' ) { mOut . append ( "&#" + ( ( int ) c ) + ";" ) ; } else { mOut . append ( c ) ; } } }
Escape plain text parts: <, >, &, Space --> ^lt;, &gt; etc.
Escape plain text parts : < > & Space -- > ^lt ; &gt ; etc .