android分享网络图片到微信,QQ无法显示

public static String encodeUrl(String url) {
try {
Matcher matcher = Pattern.compile("[\\u4e00-\\u9fa5]").matcher(url);
while (matcher.find()) {
String tmp = matcher.group();
url = url.replaceAll(tmp, java.net.URLEncoder.encode(tmp, CHAR_SET));
}
} catch (UnsupportedEncodingException e) {
e.printStackTrace();
}
return url;
}