private static void addIndentBlank(StringBuilder sb, int indent) {
    try {
        for (int i = 0; i < indent; i++) {
            sb.append('\t');
        }
    } catch (Exception e) {
        com.sensorsdata.analytics.android.sdk.SALog.printStackTrace(e);
    }
}

public static String formatJson(String jsonStr) {
    try {
        if (null == jsonStr || "".equals(jsonStr)) {
            return "";
        }
        StringBuilder sb = new StringBuilder();
        char last = '\0';
        char current = '\0';
        int indent = 0;
        boolean isInQuotationMarks = false;
        for (int i = 0; i < jsonStr.length(); i++) {
            last = current;
            current = jsonStr.charAt(i);
            switch (current) {
                case '"':
                    if (last != '\\') {
                        isInQuotationMarks = !isInQuotationMarks;
                    }
                    sb.append(current);
                    break;
                case '{':
                case '[':
                    sb.append(current);
                    if (!isInQuotationMarks) {
                        sb.append('\n');
                        indent++;
                        addIndentBlank(sb, indent);
                    }
                    break;
                case '}':
                case ']':
                    if (!isInQuotationMarks) {
                        sb.append('\n');
                        indent--;
                        addIndentBlank(sb, indent);
                    }
                    sb.append(current);
                    break;
                case ',':
                    sb.append(current);
                    if (last != '\\' && !isInQuotationMarks) {
                        sb.append('\n');
                        addIndentBlank(sb, indent);
                    }
                    break;
                case '\\':
                    break;
                default:
                    sb.append(current);
            }
        }

        return sb.toString();
    } catch (Exception e) {
        com.sensorsdata.analytics.android.sdk.SALog.printStackTrace(e);
        return "";
    }
}