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);
}
Related
I query database and show in list view like this.
public void onResume() {
super.onResume();
db = dbHelper.getWritableDatabase();
String[] queryColumns = new String[]{"_id", DBHelper.COL_VEHICLE_TYPE, DBHelper.COL_OPTION_NAME,DBHelper.COL_DATE };
cursor = db.query(DBHelper.TABLE_NAME, queryColumns,null,null,
null,null,null);
String[] showColumns = new String[]{DBHelper.COL_VEHICLE_TYPE, DBHelper.COL_DATE};
int[] views = new int[] {android.R.id.text1, android.R.id.text2};
adapter = new SimpleCursorAdapter(this, android.R.layout.two_line_list_item, cursor, showColumns, views);
lv_driver.setAdapter(adapter);
}
I keep data 0, 1 in DBHelper.COL_VEHICLE_TYPE. If data equal 0 I want to show string "car" if equal 1 show string "motobike".
How to write condition (if, else) for change integer to string and show in list view id lv_driver.
instead of using SimpleCursorAdapter, you can use extends CursorRecyclerAdapter for recyclerView, this CursorRecyclerAdapter extended RecyclerView.Adapter, you can create your cursor fetch logic on CursorRecyclerAdapter class.
this website will help you to customized each view item:
https://developer.android.com/reference/android/support/v7/widget/RecyclerView.Adapter
I would like to get a String Array from my database of all contacts (TABLE_CONTACTS) to display them in a MultiSelectionSpinner.
Is there a way to change this code easy for my purpose?
String[] array = { "one", "two", "three" };
spinner = (MultiSelectionSpinner) findViewById(R.id.mySpinner1);
spinner.setItems(array);
The MultiSelectionSpinner is working with the three numbers, but I fall into despair while trying to get the contacts from my database.
First of all, you must make sure that TABLE_CONTACTS has an id column named "_id".
If you have this, then its very simple:
Cursor cur= db.rawQuery("select _id, column_to_get_data_from FROM TABLE_CONTACTS", null);
String[] from = new String[]{"column_to_get_data_from"};
int[] to = new int[]{android.R.id.textview_to_put_data_into};
SimpleCursorAdapter mAdapter = new SimpleCursorAdapter(this, android.R.layout.simple_spinner_item, cur, from, to);
If you need to bind more fields, you must create your own item.xml spinner item layout xml file to use instead of android.R.layout.simple_spinner_item and put the corresponding values on the from and to arrays.
Then you just add the adapter to the spinner:
mAdapter.setDropDownViewResource(android.R.layout.simple_spinner_dropdown_item);
spinner.setAdapter(mAdapter);
I've populated my spinner as this:
DatabaseConnector dbConnector = new DatabaseConnector(this);
dbConnector.open();
Cursor c = dbConnector.raw("SELECT _id, nombrecasa FROM casa");
startManagingCursor(c);
String[] from = new String[]{"nombrecasa"};
int[] to = new int[]{android.R.id.text1};
SimpleCursorAdapter adapter =
new SimpleCursorAdapter(this, android.R.layout.simple_spinner_item, c, from, to );
adapter.setDropDownViewResource( android.R.layout.simple_spinner_dropdown_item );
casaSpinner = (Spinner) findViewById( R.id.casaspinner);
casaSpinner.setAdapter(adapter);
dbConnector.close();
}
And when I try to get the value as:
String idcasa = casaSpinner.getSelectedItem().toString();
it only returns this:
android.database.sqlite.SQLiteCursor#40539880
Your spinner has taken a SimpleCursorAdapter as an adapter, of which its dataset is a Cursor. When you select an item on the spinner, you've only moved the cursor to a specific row and when you call getSelectedItem() you're still requesting for the dataset object - which is still a cursor object. to do what you're trying you can simply call:
c.getString(1);
once your selection has been made. For something a little more fundamentary illustrative of what i said.
((Cursor) casaSpinner.getSelectedItem()).getString(1);
I get some data from the database and try to fill them in a listview.
i have checked through cursor.count() there is data exist but the listview show anything :/
I use a simpleCursorAdapter:
rubDb.open();
cur = rubDb.getRubParent();
startManagingCursor(cur);
Log.d("cursor length",Integer.toString(cur.getCount()));
String[] from = new String[] { RubriqueDbAdapter.RUB_NOM, RubriqueDbAdapter.RUB_VISUEL };
int[] to = new int[] {R.id.title, R.id.icon};
listAdapter = new SimpleCursorAdapter(this, R.layout.itemgauche, cur, from, to);
listeGauche.setAdapter(listAdapter);
public Cursor getRubParent() {
Cursor cursorResults = mDb.rawQuery("SELECT * FROM " + TABLE_RUBRIQUE + " WHERE rub_id_parent = 0 ORDER BY rub_ordre ASC", null);
return cursorResults;
}
how can I get a picture from the sdcard and put it on the ImageView in the listview ?
Thanks for your help !
First, you should be using a CursorAdapter, perhaps a SimpleCursorAdapter, instead of manually copying all of the data into objects in an array, just to use ArrayAdapter.
Second, if your list will be anything other than a simple piece of text, you must teach the adapter how to do whatever else you want. With SimpleCursorAdapter, you could associate a ViewBinder with it, or subclass SimpleCursorAdapter and override setViewImage(), or subclass SimpleCursorAdapter and override bindView().
I'm trying to populate a listview with products. I can do it, but I need them to have custom id's (the ones from the SQLite database). How can I do this? This is my code without the id implementation so far:
ArrayList<String> productNameList = new ArrayList<String>();
ArrayList<String> productIdList = new ArrayList<String>();
Cursor results = myDbHelper.getProducts();
ListView lv = (ListView) findViewById(R.id.productlist);
while (results.moveToNext()){
productNameList.add(results.getString(results.getColumnIndex("name")));
productIdList.add(results.getString(results.getColumnIndex("id")));
}
lv.setAdapter(new ArrayAdapter<String>(this,android.R.layout.simple_list_item_1 , productNameList));
You should use a SimpleCursorAdapter:
String[] columns = new String[] { "_id", "name" };
int[] to = new int[] { android.R.id.text1, android.R.id.text2 };
SimpleCursorAdapter mAdapter = new SimpleCursorAdapter(this, android.R.layout.simple_list_item_2, cursor, columns, to);
lv.setAdapter(mAdapter));
"to" and "columns" define a mapping:
"colums" is a list of the database column names you want the SimpleCursorAdapter to read. And "to" is a list of android ids specifying on which widget the values from the cursor are set.
In the latter code this means that the value of "_id" will be displayed in the textfield with the android id "android.R.id.text1" and the value of the column "name" will go into textfield "android.R.id.text2".