Java/正規表現

ヒットする文字列をすべて取得

Pattern pattern = Pattern.compile("(http://example.com/img/[0-9a-z-]+/mobile/[0-9]+_128x128.jpg)");
Matcher matcher = pattern.matcher(html);
// 検索ヒット
while (matcher.find()) {
    Log.d("tag1", "url=" + matcher.group(1));
}

後方一致

Pattern pattern = Pattern.compile(".mp4$");
Matcher matcher = pattern.matcher(url);
while (matcher.find()) {
    Log.d("tag1", "url=" + url);
}