Extras

Since AndroidAnnotations 1.0

@Extra

The @Extra annotation indicates that an activity field should be injected with the corresponding Extra from the Intent that was used to start the activity.

The extra key must be set in the annotation parameter, ie @Extra("someExtraKey").

The field must not be private. The extra can be of any type.

Usage example:

@Extra("my_string_extra")
String myMessage;
	
@Extra("my_date_extra")
Date myDateExtraWithDefaultValue = new Date();

Equivalent boilerplate code:

String myMessage;
	
Date myDateExtraWithDefaultValue = new Date();

@Override
public void onCreate(Bundle savedInstanceState) {
    [...]
    Intent intent = getIntent();
    Bundle extras = intent.getExtras();

    if (extras.containsKey("my_string_extra")) {
        try {
            myMessage = (String) extras.get("my_string_extra");
        } catch (ClassCastException e) {
            Log.e(TAG, "Could not cast extra to expected type, the field is left to its default value", e);
        }
    }

    if (extras.containsKey("my_date_extra")) {
        try {
            myDateExtraWithDefaultValue = (Date) extras.get("my_date_extra");
        } catch (ClassCastException e) {
            Log.e(TAG, "Could not cast extra to expected type, the field is left to its default value", e);
        }
    }
}