Develop Reference

Resize bitmap images on the fly inside SimpleCursorAdapter

Is it possible to resize/reduce size of photos on the fly inside SimpleCursorAdapter?
Scenario is that im getting the path of the photos that are saved on sdcard via a cursor, and showing them in a listview via SimpleCursorAdapter.
here is part of my code in my Activity's onCreate():
Cursor c = mydb.rawQuery("select * from events;", null);
if (c != null ) {
c.moveToFirst();
}
String[] from = new String[]{DbHandler.column_id, DbHandler.column_name, DbHandler.column_location, DbHandler.column_date, DbHandler.img_loc};
int[] to = new int[] {R.id.textView1, R.id.textView2, R.id.textView3, R.id.textView4, R.id.photoInDb};
SimpleCursorAdapter simpleCurs = new SimpleCursorAdapter(this, R.layout.listviewfinal, c, from, to);
listView.setAdapter(simpleCurs);
If its possible, please tell me how? also do i need to define setViewValue?

SimpleCursorAdapter returns empty data

When I am trying to put data from Database to ListView via SimpleCursorAdapter, the rows of the ListView are shown but they are empty.
Like:
[___________]
[___________]
[___________]
Instead of:
[TEXT]
[TEXT]
[TEXT]
My code:
db = provider.getReadableDatabase();
String[] columns = {"_id", "Title"};
Cursor cursor = db.query(NotificationsProvider.TABLE_NAME, columns, null, null, null, null, null);
Log.d(TAG, "COUNT: "+cursor.getCount());
String[] clm = {"Title"};
int[] to = {android.R.id.list};
cursorAdapter = new SimpleCursorAdapter(this,
android.R.layout.simple_list_item_1,
cursor, clm, to, 0);
setListAdapter(cursorAdapter);
Thanks!

You are simply using the wrong id, try:
int[] to = {android.R.id.text1};
(You can check out simple_list_item_1.xml yourself to verify the appropriate id.)

Android Binding SQLite to GridView in Eclipse

I have made the following code to retrive data from SQLite database.
public Cursor fetchAllScores() {
return database.query(DATABASE_TABLE, new String[] { KEY_ROWID,
KEY_PLAYDATE, KEY_NUMVALA, KEY_NUMVALB }, null, null, null,
null, null);
}
Then I call this function in my main.java file using the following
cursor = dbHelper.fetchAllScores();
startManagingCursor(cursor);
After having cursor I manage to populate myGridView with some data using following code
GridView myGV = (GridView)findViewById(R.id.gridView1);
String[] cols = new String[] { scoreDbAdapter.KEY_PLAYDATE, scoreDbAdapter.KEY_NUMVALA, scoreDbAdapter.KEY_NUMVALB};
int[] views = new int[] { android.R.id.text1, android.R.id.text2, android.R.id.text2 };
SimpleCursorAdapter adapter = new SimpleCursorAdapter(this,
android.R.layout.simple_list_item_1, cursor, cols, views);
Log.w("NumRows",adapter.getCount() + "");
myGV.setAdapter(adapter);
Now the problem is only first row is populated and first two columns, I want data like in forst row (2011-10-27 , 5 , 6 ) and second row like (2011-10-26 , 3 , 2 ) but i m getting is only forst row like (2011-10-27, 2011-10-26 ).
Can this be fixed in GridView?

For your question, take a look here, Binding to Data with AdapterView.
Note: Below decription is just example for how to bind cursor to an adapter.
Filling the Layout with Data
Inserting data into the layout is typically done by binding the AdapterView class to an Adapter, which retrieves data from an external source (perhaps a list that the code supplies or query results from the device's database).
The following code sample does the following:
1.Creates a Spinner with an existing View and binds it to a new ArrayAdapter that reads an array of colors from the local resources.
2.Creates another Spinner object from a View and binds it to a new SimpleCursorAdapter that will read people's names from the device contacts (see Contacts.People).
// Get a Spinner and bind it to an ArrayAdapter that
// references a String array.
Spinner s1 = (Spinner) findViewById(R.id.spinner1);
ArrayAdapter adapter = ArrayAdapter.createFromResource( this, R.array.colors,
android.R.layout.simple_spinner_item);
adapter.setDropDownViewResource(android.R.layout.simple_spinner_dropdown_item);
s1.setAdapter(adapter);
// Load a Spinner and bind it to a data query.
private static String[] PROJECTION = new String[] { People._ID, People.NAME};
Spinner s2 = (Spinner) findViewById(R.id.spinner2);
Cursor cur = managedQuery(People.CONTENT_URI, PROJECTION, null, null);
SimpleCursorAdapter adapter2 = new SimpleCursorAdapter(this,android.R.layout.simple_spinner_item,cur,new String[] {People.NAME}, new int[] {android.R.id.text1});
adapter2.setDropDownViewResource(android.R.layout.simple_spinner_dropdown_item);
s2.setAdapter(adapter2);
Note that it is necessary to have the People._ID column in projection used with CursorAdapter or else you will get an exception.
If, during the course of your application's life, you change the underlying data that is read by your Adapter, you should call notifyDataSetChanged(). This will notify the attached View that the data has been changed and it should refresh itself.
For more info look at this,
Custom CursorAdapters.
Thanks.

Make a new layout which contains textViews. Find the layout as shown in first line of the code below and attach your data to the listView. ListView loads the layout containing textView.
private void populateGrid()
{
ListView lv = (ListView)findViewById(R.id.listView1);
Cursor c = dbHelper.fetchAllScores();
startManagingCursor(cursor);
String[] cols = new String[] { TodoDbAdapter.KEY_PLAYDATE, TodoDbAdapter.KEY_NUMVALA, TodoDbAdapter.KEY_NUMVALB};
int[] views = new int[] { R.id.txt_date, R.id.txt_no, R.id.txt_yes};
// Now create an array adapter and set it to display using our row
SimpleCursorAdapter adapter = new SimpleCursorAdapter(this,
R.layout.listviewtemp, c, cols, views);
Log.w("NumRows",adapter.getCount() + "");
lv.setAdapter(adapter);
}
R.layout.listviewtemp is the listView template layout (separate xml), lv is the listview found in the mainlayout.xml.
public Cursor fetchAllScores() {
return database.query(DATABASE_TABLE, new String[] { KEY_ROWID,
KEY_PLAYDATE, KEY_NUMVALA, KEY_NUMVALB }, null, null, null,
null, null);
}

TextView with Database

I'd like to put some data in a TextView. My Code so far:
myDataBase = myDbHelper.getReadableDatabase();
Cursor cursor = myDataBase.rawQuery(KLASSEN_SELECT_RAW, null);
startManagingCursor(cursor);
SimpleCursorAdapter sca =
new SimpleCursorAdapter(this, R.layout.barinfo_layout, cursor, new String[]
{"name"}, new int[] {R.id.barinfo_barinfo});
barinfo.setText((CharSequence) sca);
Eclipse doesn't show errors but the programm chrashes when I execute it.
What do I have to change?

How to retrieve contacts from emulator to my application in android?

I want to create a contact list application in my android phone. I want to retrieve all the contact list from emulator and the contacts should be listed.

Even API Demo samples has a similar program
Cursor c = getContentResolver().query(Phones.CONTENT_URI, null, null, null, null);
startManagingCursor(c);
// Map Cursor columns to views defined in simple_list_item_2.xml
ListAdapter adapter = new SimpleCursorAdapter(this,
android.R.layout.simple_list_item_2, c,
new String[] { Phones.NAME, Phones.NUMBER },
new int[] { android.R.id.text1, android.R.id.text2 });
setListAdapter(adapter);