Filling an adapter view with data in android have two methods.
You can populate an
Android provides several subclasses of
2. SimpleCursorAdapter
1. ArrayAdapter
Use this adapter when your data source is an array. By default,
For example, if you have an array of strings you want to display in a
Then simply call
To customize the appearance of each item you can override the
Example 1 Example 2 Example 3
2. SimpleCursorAdapter
Example 1 Example 2 Example 3
You can populate an
AdapterView such as ListView or GridView by binding the AdapterView instance to an Adapter, which retrieves data from an external source and creates a View that represents each data entry.Android provides several subclasses of
Adapter that are useful for retrieving different kinds of data and building views for an AdapterView. T1. ArrayAdapter2. SimpleCursorAdapter
1. ArrayAdapter
Use this adapter when your data source is an array. By default,
ArrayAdapter creates a view for each array item by calling toString() on each item and placing the contents in a TextView. For example, if you have an array of strings you want to display in a
ListView, initialize a new ArrayAdapter using a constructor to specify the layout for each string and the string array:ArrayAdapter adapter = new ArrayAdapter<String>(this,The arguments for this constructor are:
android.R.layout.simple_list_item_1, myStringArray);
Then simply call
setAdapter() on your ListView:ListView listView = (ListView) findViewById(R.id.listview);
listView.setAdapter(adapter);
To customize the appearance of each item you can override the
toString() method for the objects in your array. Or, to create a view for each item that's something other than a TextView (for example, if you want an ImageView for each array item), extend the ArrayAdapter class and override getView() to return the type of view you want for each item.Example 1 Example 2 Example 3
2. SimpleCursorAdapter
- Use this adapter when your data comes from a
Cursor. When usingSimpleCursorAdapter, you must specify a layout to use for each row in theCursorand which columns in theCursorshould be inserted into which views of the layout. For example, if you want to create a list of people's names and phone numbers, you can perform a query that returns aCursorcontaining a row for each person and columns for the names and numbers. You then create a string array specifying which columns from theCursoryou want in the layout for each result and an integer array specifying the corresponding views that each column should be placed:String[] fromColumns = {ContactsContract.Data.DISPLAY_NAME,
When you instantiate the
ContactsContract.CommonDataKinds.Phone.NUMBER};
int[] toViews = {R.id.display_name, R.id.phone_number};SimpleCursorAdapter, pass the layout to use for each result, theCursorcontaining the results, and these two arrays:SimpleCursorAdapter adapter = new SimpleCursorAdapter(this,
The
R.layout.person_name_and_number, cursor, fromColumns, toViews, 0);
ListView listView = getListView();
listView.setAdapter(adapter);SimpleCursorAdapterthen creates a view for each row in theCursorusing the provided layout by inserting eachfromColumnsitem into the correspondingtoViewsview.
.
notifyDataSetChanged(). This will notify the attached view that the data has been changed and it should refresh itself.Example 1 Example 2 Example 3
Handling click events
You can respond to click events on each item in anAdapterView by implementing the AdapterView.OnItemClickListener interface. For example:// Create a message handling object as an anonymous class.
private OnItemClickListener mMessageClickedHandler = new OnItemClickListener() {
public void onItemClick(AdapterView parent, View v, int position, long id) {
// Do something in response to the click
}
};
listView.setOnItemClickListener(mMessageClickedHandler);
Sources: http://developer.android.com/guide/topics/ui/declaring-layout.html
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