As I am trying this also and I can find a solution by myself
1: make sure video url is https://drive.google.com/file/d/VIDEO-ID/preview"
2: I download web content from the above url and get direct video url:
public String downloadUrl(String myurl) throws IOException {
InputStream is = null;
try {
URL url = new URL(myurl);
HttpURLConnection conn = (HttpURLConnection) url.openConnection();
conn.setReadTimeout(10000);
conn.setConnectTimeout(15000);
conn.setRequestMethod("GET");
conn.setDoInput(true);
conn.connect();
is = conn.getInputStream();
String contentAsString = readIt(is);
return contentAsString;
} finally {
if (is != null) {
is.close();
}
}
}
//Get direct video url from stream output
public String readIt(InputStream stream) throws IOException {
BufferedReader reader = new BufferedReader(new InputStreamReader(stream, "UTF-8"));
StringBuilder sb = new StringBuilder();
String line;
while ((line = reader.readLine()) != null) {
if (line.contains("fmt_stream_map")) {
sb.append(line + "\n");
break;
}
}
reader.close();
String result = decode(sb.toString());
String[] url = result.split("\\|");
return url[1];
}
//We need a function to decode url to normal use
public String decode(String in) {
String working = in;
int index;
index = working.indexOf("\\u");
while (index > -1) {
int length = working.length();
if (index > (length - 6)) break;
int numStart = index + 2;
int numFinish = numStart + 4;
String substring = working.substring(numStart, numFinish);
int number = Integer.parseInt(substring, 16);
String stringStart = working.substring(0, index);
String stringEnd = working.substring(numFinish);
working = stringStart + ((char) number) + stringEnd;
index = working.indexOf("\\u");
}
return working;
}
After i use thes three function now I can get a direct video url that return by readtIt(InputStream stream)
as a string and I can use it for parsing to VideoView.