CODEWITHSUNDEEP
android
user2164685
user2164685

Reputation:

Android SimpleCursorAdapter for generating ListView

I am using ListView in android

My data is coming from database

I Have learned SimpleCursorAdapter and this is the code from official docs

SimpleCursorAdapter adapter = new SimpleCursorAdapter(this, 
        R.layout.person_name_and_number, cursor, fromColumns, toViews, 0);
ListView listView = getListView();
listView.setAdapter(adapter);

All the thing i have understand successfully created the list view also but there is one doubt what the use of last argument 0 in the constructor they have not explained. Please tell me what this last argument is doing here.

Upvotes: 0

Views: 372

Answers (2)

user2060635
user2060635

Reputation: 261

Listview from Cursor (without Loaders)

SimpleCursorAdapter adapter = new SimpleCursorAdapter(

    this,                // The Activity context
    R.layout.list_item,  // Points to the XML for a list item
    cursor,              // Cursor that contains the data to display
    dataColumns,         // Bind the data in column "text_column"...
    viewIDs              // ...to the TextView with id "R.id.text_view"

    );

Listview from Cursor (Using Loaders)

To Asynchronously load data to the Containers(Listview or Fragments) Loaders are best approach. 

// Initialize the adapter. Note that we pass a "null" Cursor as the
// third argument. We will pass the adapter a Cursor only when the
// data has finished loading for the first time (i.e. when the
// LoaderManager delivers the data to onLoadFinished). Also note
// that we have passed the "0" flag as the last argument. This
// prevents the adapter from registering a ContentObserver for the
// Cursor (the CursorLoader will do this for us!).
mAdapter = new SimpleCursorAdapter(this, R.layout.list_item,
    null, dataColumns, viewIDs, 0);

The following URL describes above. http://www.androiddesignpatterns.com/2012/07/understanding-loadermanager.html

Upvotes: 0

Shade
Shade

Reputation: 10011

The SimpleCursorAdapter documentation explains that these are flags used to determine the behavior of the adapter:

Flags used to determine the behavior of the adapter, as per CursorAdapter(Context, Cursor, int).

See the CursorAdapter docs for more information.

Upvotes: 1

Related Questions