Shared Preferences

The next implementation is to hide the key in the shared preferences and then load it each time the app is opened. There are two variations on this theme. A typical app will ask the user to encrypt the app the first time and save the key in the shared preferences. Listing 5-5 shows how to write and load our encryption key from a shared preferences file.

Listing 5-5 Storing passwords in the shared preferences file

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private void saveLastSuccessfulCreds() {    String username =((EditText) findViewById(R.id.username_field)).getText().toString();    String password =                                               // line 3((EditText) findViewById(R.id.password_field)).getText().toString();    SharedPreferences.Editor ...

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