Hi,
I am able to log the user in and retrieve the access token the first time and store it using SharedPreferences. However, I want the users to log in automatically the next time they open my app (retrieve the access token silently).
I can always retrieve the access token stored in the app's local storage (SharedPreferences) but it might not be valid after a few hours/days. Is there a way to check if the access token in the local storage is valid and if not, retrieve a new access token without the user entering their dropbox credentials again.
Below is my code for retrieving the access token the first time:
private void dropboxLogin() {
System.out.println("First Login");
Auth.startOAuth2Authentication(MainActivity.this, APP_KEY);
}
@Override
protected void onResume() {
super.onResume();
SharedPreferences prefs = getSharedPreferences("dropbox-sample", MODE_PRIVATE);
String accessToken = prefs.getString("access-token", null);
if (accessToken == null) {
accessToken = Auth.getOAuth2Token();
if (accessToken != null) {
prefs.edit().putString("access-token", accessToken).apply();
initAndLoadData(accessToken);
}
} else {
initAndLoadData(accessToken);
}
System.out.println("Access Token: " + accessToken);
String uid = Auth.getUid();
String storedUid = prefs.getString("user-id", null);
if (uid != null && !uid.equals(storedUid)) {
prefs.edit().putString("user-id", uid).apply();
}
}Note that I am using Dropbox API v2.
Thanks in advance!
