@SharedPref
public interface MyPrefs {

        // The field name will have default value "John"
	@DefaultString("John")
	String name();

        // The field age will have default value 42
	@DefaultInt(42)
	int age();

        // The field lastUpdated will have default value 0
	long lastUpdated();

}

@EActivity
public class MyActivity extends Activity {

	@Pref
	MyPrefs_ myPrefs;
	
	// ...

}

@EActivity
public class MyActivity extends Activity {

  @Pref
  void setOnePref(MyPrefs_ myPrefs){
    // do something with myPrefs
  }
  
  void setMultiplePrefs(@Pref MyPrefs_ myPrefs, @Pref AnotherPrefs_ anotherPrefs){
    // do something with myPrefs and anotherPrefs
  }

}

// Simple edit
myPrefs.name().put("John");

// Batch edit
myPrefs.edit()
  .name()
  .put("John")
  .age()
  .put(42)
  .apply();

// Preference clearing:
myPrefs.clear();

// Check if a value exists:
boolean nameExists = myPrefs.name().exists();

// Reading a value
long lastUpdated = myPrefs.lastUpdated().get();

// Reading a value and providing a fallback default value
long now = System.currentTimeMillis();
long lastUpdated = myPrefs.lastUpdated().getOr(now);

@SharedPref
public interface MyPrefs {
    @DefaultRes(R.string.defaultPrefName)
    String resourceName();

    @DefaultRes // uses 'R.string.defaultPrefAge' to set default value
    String defaultPrefAge();
}

@SharedPref
public interface MyPrefs {
    @DefaultString(value = "John", keyRes = R.string.myPrefKey)
    String name();

    @DefaultRes(keyRes = R.string.myOtherPrefKey)
    String defaultPrefAge();
}

@SharedPref(value=SharedPref.Scope.UNIQUE)
public interface MyPrefs {
...

@SharedPref(SharedPref.Scope.UNIQUE)
public interface MyPrefs {
...
}

public static String PREF_NAME = "MyPrefs";

// in onCreate

// Using your MyPrefs values 
this.getPreferenceManager().setSharedPreferencesName(PREF_NAME);

// Opening the layout 
addPreferencesFromResource(R.xml.prefs);