You will need to save data in shared preference when you are developing android applications. Below example show how to develop that functionality.

Save Data in Shared Preferences

SharedPreferences pref = getApplicationContext().getSharedPreferences("user", 0);
SharedPreferences.Editor editor = pref.edit();
editor.putString("userpin", pin.toString());

Read Data from SharedPreferences

SharedPreferences settings = getSharedPreferences("user", 0);
String userPin = settings.getString("userpin","");

Remember this way is good only for small scale data saving and processing. Other wise you have to use SQL Lite.

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