I have been developing for over 10 years in languages other than Java. I am new to the Android world, but I'm trying to dive right in. I am trying to make a draggable list and I found the wonderful repos https://github.com/commonsguy/cwac-touchlist to do the dragging and dropping of the list items. However, I am getting an error when I am trying to @Override the drop method for the DropListener interface. It states that: "The method drop(int, int) of type new TouchListView.DropListener(){} must override a superclass method"
I tried to implement the way the demo utilizes the TouchList into my application, and I also copied the code exactly in another Action, and I'm getting the same error.
My code:
package bu.homework.shoppinglist;
import android.app.ListActivity;
import android.content.Intent;
import android.database.Cursor;
import android.os.Bundle;
import android.view.ContextMenu;
import android.view.ContextMenu.ContextMenuInfo;
import android.view.Menu;
import android.view.MenuItem;
import android.view.View;
import android.widget.AdapterView.AdapterContextMenuInfo;
import android.widget.ListView;
import android.widget.SimpleCursorAdapter;
import com.commonsware.cwac.tlv.TouchListView;
public class ItemListActivity extends ListActivity {
private static final int ACTIVITY_CREATE=0;
private static final int ACTIVITY_EDIT=1;
private static final int INSERT_ID = Menu.FIRST;
private static final int DELETE_ID = Menu.FIRST + 1;
private ItemsModel mDbHelper;
/** Called when the activity is first created. */
@Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.item_list);
mDbHelper = new ItemsModel(this);
mDbHelper.open();
fillList();
TouchListView itemListView = (TouchListView) getListView();
itemListView.setDropListener(onDrop);
System.out.print("On Drop");
// itemListView.setRemoveListener(onRemove);
// registerForContextMenu(itemListView);
}
private TouchListView.DropListener onDrop = new TouchListView.DropListener() {
@Override
public void drop(int from, int to) {
System.out.print(from);
System.out.print(to);
}
};
private TouchListView.RemoveListener onRemove = new TouchListView.RemoveListener() {
public void remove(int which) {
}
};
@Override
public boolean onCreateOptionsMenu(Menu menu) {
boolean result = super.onCreateOptionsMenu(menu);
menu.add(0, INSERT_ID, 0, R.string.menu_insert);
return result;
}
@Override
public boolean onMenuItemSelected(int featureId, MenuItem item) {
switch(item.getItemId()) {
case INSERT_ID:
createItem();
return true;
}
return super.onMenuItemSelected(featureId, item);
}
@Override
public boolean onOptionsItemSelected(MenuItem item) {
switch (item.getItemId()) {
case INSERT_ID:
createItem();
return true;
}
return super.onOptionsItemSelected(item);
}
@Override
public void onCreateContextMenu(ContextMenu menu, View v,
ContextMenuInfo menuInfo) {
super.onCreateContextMenu(menu, v, menuInfo);
menu.add(0, DELETE_ID, 0, R.string.menu_delete);
}
@Override
public boolean onContextItemSelected(MenuItem item) {
switch(item.getItemId()) {
case DELETE_ID:
AdapterContextMenuInfo info = (AdapterContextMenuInfo) item.getMenuInfo();
mDbHelper.deleteItem(info.id);
fillList();
return true;
}
return super.onContextItemSelected(item);
}
@Override
protected void onListItemClick(ListView l, View v, int position, long id) {
super.onListItemClick(l, v, position, id);
Intent i = new Intent(this, ItemEditActivity.class);
i.putExtra(ItemsModel.KEY_ROWID, id);
startActivityForResult(i, ACTIVITY_EDIT);
}
@Override
protected void onActivityResult(int requestCode, int resultCode, Intent intent) {
super.onActivityResult(requestCode, resultCode, intent);
fillList();
}
private void createItem() {
Intent i = new Intent(this, ItemEditActivity.class);
startActivityForResult(i, ACTIVITY_CREATE);
}
private void fillList() {
// Get all of the notes from the database and create the item list
Cursor itemCursor = mDbHelper.fetchAllItems();
startManagingCursor(itemCursor);
// Create an array to specify the fields we want to display in the list (only NAME)
String[] from = new String[] { ItemsModel.KEY_NAME };
// and an array of the fields we want to bind those fields to (in this case just item_row)
int[] to = new int[] { R.id.item_row };
// Now create an array adapter and set it to display using our row
SimpleCursorAdapter notes =
new SimpleCursorAdapter(this, R.layout.item_row, itemCursor, from, to);
setListAdapter(notes);
}
}
The code isn't near complete, but my goal is to combine the functionality of the android tutorial for the notepad with the touchlist.
My question is, what am I doing wrong. Also is there a better way to do drag and drop lists.
Thanks, Chris Swenor
