How to use android fingerprint API to read all the fingerprints?

Question

Am developing an android application that will be used in a single device to register all the employee with their fingerprint and to send the data back to the da.

I have developed an application as Guided Here which can read the fingerprint. But it can only read fingerprints which were previously registered in the device.

How can i make it read all the employee fingerprints so as i can post it back to the databases?

Answer 1

Obviously, you have to cache your database inside android device. Just put your database in the correspond directory.

You can use both shared preferences and SQLite queries. It depends on size of the database and other parameters .

Answer 2

Use shared preference

to store values in shared preferences:

SharedPreferences preferences = PreferenceManager.getDefaultSharedPreferences(this);
SharedPreferences.Editor editor = preferences.edit();
editor.putString("UserID","ABC");
editor.apply();

to retrieve values from shared preferences:

SharedPreferences preferences = PreferenceManager.getDefaultSharedPreferences(this);
String name = preferences.getString("Name", "");
if(!name.equalsIgnoreCase(""))
{
    name = name + "  XYZ";  /* Edit the value here*/
}