Question

I have an activity that contain a list of data (TextView), i need to save this data that have been choose (onClick) in the list and been able to get and read it in another activity(history)

I understand that is exist a possibility with the “serializable” but i did not success to understand how it could help me.

i will be happy if someone can clarify this subject for me,example?.

Thank you for helping!!

Answer 1

If you’re trying to pass a String to another activity, you can do this with putExtra and getStringExtra:

Intent intent = new Intent(this, OtherActivity.class);
intent.putExtra("parameter", myStringParameter);
startActivity(intent);

and then read it in OtherActivity‘s onCreate method:

String parameter = getIntent().getStringExtra("parameter");

The Serializable interface is useful for marshalling more complicated objects; you don’t need this if you’re just dealing with String.

Edit – if you need to store small amounts of data persistently you could use SharedPreferences:

final String TAG = "MyApplication";
SharedPreferences prefs = getSharedPreferences(TAG, MODE_PRIVATE);
prefs.edit().putString("parameter", myStringParameter).commit();

and then to read the preferences:

final String TAG = "MyApplication";
SharedPreferences prefs = getSharedPreferences(TAG, MODE_PRIVATE);
String parameter = prefs.getString("parameter", null);

This data will be available even after your application closes.