今月は1つも記事を書いてなかったので間に合わせでメモを書く。

// key1 : value1, key2 : value2
ArrayList<NameValuePair> nameValuePair = new ArrayList<NameValuePair>();
Iterator<String> it = data.keySet().iterator();
while (it.hasNext()) {
    String key = it.next();
    nameValuePair.add(new BasicNameValuePair(key, data.get(key)));
}
mQuery = URLEncodedUtils.format(nameValuePair, "UTF-8");
// key1=value1&key2=value2