6
Mam listView, który jest wypełniany kursorem z modułu ładującego kursor i przy użyciu dostawcy zawartości. Chcę posortować listView tak, aby było ustawione na przykład najnowsze elementy są dodawane na górze listyViewView. ListView zawsze pojawia się w tej samej kolejności i nie mogę zmienić tej kolejności.Porządek sortowania nie działa z listViewView i programem ładującym kursor
Próbowałem używać kolejności sortowania i zmieniając go i bez względu na to, co jest ustawione na liście zawsze pokazuje pozycje w tych samych pozycjach. Używanie porządek tak,
CursorLoader loader = new CursorLoader
(List.this, Database.CONTENT_URI, projection,
null, null, LocationsTable.TIME_STAMP + " ASC");
Próbowałem sortować według innych kolumn oprócz datownik, ale wynik jest zawsze taki sam. kolejność pozycji na liście nigdy się nie zmienia. nawet zmiana ASC na DESC nie ma żadnego efektu.
Jak ustawić kolejność lub pozycje elementów wyświetlanych na liścieZapytana przez kursorAdapter?
kilka próbki kodu z klasy listview
z metody onCreate
adapter = new ViewAdapter(this, null, 0);
// sets array adapter to listview
listViewOne.setAdapter(adapter);
getLoaderManager().initLoader(LOADER_ID_ONE, null, this);
Trzy metody wywołania zwrotnego z LoaderCallbacks<Cursor>
@Override
public Loader<Cursor> onCreateLoader(int id, Bundle args) {
String projection[] = new String[]{LocationsTable._ID,
LocationsTable.LATITUDE, LocationsTable.LONGITUDE,
LocationsTable.LAND_ADDRESS, LocationsTable.LAST_NAME,
LocationsTable.FIRST_NAME, LocationsTable.LOCATION_IMAGE,
LocationsTable.TIME_STAMP };
CursorLoader loader = new CursorLoader
(List.this, Database.CONTENT_URI, projection, null, null,
LocationsTable.TIME_STAMP + " ASC");
return loader;
} // onCreateLoader
@Override
public void onLoadFinished(Loader<Cursor> loader, Cursor cursor) {
adapter.swapCursor(cursor);
} // onLoadFinished
@Override
public void onLoaderReset(Loader<Cursor> arg0) {
adapter.swapCursor(null);
} // onLoaderReset
Jest to ciąg używany do tworzenia tabeli w baza danych rozszerza ContentProvider
private static final String SQL_QUERY_CREATE = "CREATE TABLE "
+ LocationsTable.TABLE_NAME + " (" + LocationsTable._ID + " INTEGER PRIMARY KEY AUTOINCREMENT, " + LocationsTable.LATITUDE + " TEXT NOT NULL, "
+ LocationsTable.LONGITUDE + " TEXT NOT NULL, " + LocationsTable.LAND_ADDRESS + " TEXT, " + LocationsTable.LAST_NAME + " TEXT, "
+ LocationsTable.FIRST_NAME + " TEXT, " + LocationsTable.LAST_NAME_ALT + " TEXT, " + LocationsTable.FIRST_NAME_ALT + " TEXT, "
+ LocationsTable.CONTACT_ADDRESS + " TEXT, " + LocationsTable.PHONE_NUMBER + " TEXT, " + LocationsTable.MOBILE_NUMBER + " TEXT, "
+ LocationsTable.EMAIL + " TEXT, " + LocationsTable.LOCATION_IMAGE + " TEXT, " + LocationsTable.TIME_STAMP_IMAGE + " INTEGER, "
+ LocationsTable.TIME_STAMP + " INTEGER " + ");";
Adapter kursor klasa
public class ViewAdapter extends CursorAdapter {
LayoutInflater inflater;
LatAndLngString latAndLng;
public ViewAdapter(Context context, Cursor cursor, int b) {
super(context, cursor, b);
inflater = LayoutInflater.from(context);
} // ViewAdapter constructor
@Override
public void bindView(View view, final Context context, Cursor cursor) {
TextView textViewOne = (TextView) view.findViewById(R.id.textView1); // address
TextView textViewTwo = (TextView) view.findViewById(R.id.textView2); // last name
TextView textViewThree = (TextView) view.findViewById(R.id.textView3); // first name
final Button buttonOne = (Button) view.findViewById(R.id.button1);
final ImageView imageViewOne = (ImageView) view.findViewById(R.id.imageView1);
final ImageView imageViewTwo = (ImageView) view.findViewById(R.id.imageView2);
textViewOne.setText(cursor.getString(cursor.getColumnIndex(LocationsTable.LAND_ADDRESS)));
textViewTwo.setText(cursor.getString(cursor.getColumnIndex(LocationsTable.LAST_NAME)));
textViewThree.setText(cursor.getString(cursor.getColumnIndex(LocationsTable.FIRST_NAME)));
String latitude = cursor.getString(cursor.getColumnIndex(LocationsTable.LATITUDE));
String longitude = cursor.getString(cursor.getColumnIndex(LocationsTable.LONGITUDE));
String imagePath = cursor.getString(cursor.getColumnIndex(LocationsTable.LOCATION_IMAGE));
long timeStampImage = cursor.getLong(cursor.getColumnIndex(LocationsTable.TIME_STAMP));
if(imagePath != null){
int widthInDP = (int) TypedValue.applyDimension(TypedValue.COMPLEX_UNIT_DIP, 80, getResources().getDisplayMetrics());
int heightInDP = (int) TypedValue.applyDimension(TypedValue.COMPLEX_UNIT_DIP, 50, getResources().getDisplayMetrics());
Bitmap sizedBitmap = ImageUtil.createReducedBitmap(imagePath, widthInDP, heightInDP);
imageViewTwo.setImageBitmap(sizedBitmap);
}
textViewOne.setMaxLines(1);
textViewTwo.setMaxLines(2);
textViewThree.setMaxLines(3);
final LatAndLngString latAndLng = new LatAndLngString(latitude, longitude);
buttonOne.setTag(latAndLng);
imageViewOne.setTag(latAndLng);
imageViewTwo.setTag(latAndLng);
// go to register page to edit fields
buttonOne.setOnTouchListener(new OnTouchListener() {
@Override
public boolean onTouch(View view, MotionEvent event) {
if (event.getAction() == MotionEvent.ACTION_DOWN) {
((Button) view).setAlpha(0.3f);
LatAndLngString latAndLngRow = (LatAndLngString) buttonOne.getTag();
Intent intent = new Intent(List.this, Register.class);
intent.putExtra("latitude", String.valueOf(latAndLngRow.latitude));
intent.putExtra("longitude", String.valueOf(latAndLngRow.longitude));
intent.putExtra("origin", 1);
intent.setFlags(Intent.FLAG_ACTIVITY_CLEAR_TOP);
List.this.startActivity(intent);
return true;
} else if (event.getAction() == MotionEvent.ACTION_UP) {
((Button) view).setAlpha(1.0f);
return true;
}
return false;
}
});
// go to map page to display map
imageViewOne.setOnTouchListener(new OnTouchListener() {
@Override
public boolean onTouch(View view, MotionEvent event) {
if (event.getAction() == MotionEvent.ACTION_DOWN) {
((ImageView) view).setAlpha(0.3f);
LatAndLngString latAndLngRow = (LatAndLngString) buttonOne.getTag();
Intent intent = new Intent(List.this, Map.class);
intent.putExtra("latitude", String.valueOf(latAndLngRow.latitude));
intent.putExtra("longitude", String.valueOf(latAndLngRow.longitude));
intent.setFlags(Intent.FLAG_ACTIVITY_CLEAR_TOP);
intent.putExtra("showMarker", true);
List.this.startActivity(intent);
return true;
} else if (event.getAction() == MotionEvent.ACTION_UP) {
((ImageView) view).setAlpha(1.0f);
return true;
}
return false;
}
});
// set image for button
imageViewTwo.setOnTouchListener(new OnTouchListener() {
@Override
public boolean onTouch(View view, MotionEvent event) {
if (event.getAction() == MotionEvent.ACTION_DOWN) {
((ImageView) view).setAlpha(0.3f);
LatAndLngString latAndLngRow = (LatAndLngString) view.getTag();
Intent intent = new Intent(List.this, ImageSelector.class);
intent.putExtra("latitude", String.valueOf(latAndLngRow.latitude));
intent.putExtra("longitude", String.valueOf(latAndLngRow.longitude));
List.this.startActivity(intent);
return true;
} else if (event.getAction() == MotionEvent.ACTION_UP) {
((ImageView) view).setAlpha(1.0f);
return true;
}
return false;
}
});
}
@Override
public View newView(Context context, Cursor cursor, ViewGroup parent) {
return inflater.inflate(R.layout.listview_row, parent, false);
}
}
dostawcy treści CLASS pełny kod tutaj
// application package name
// import statements
public class Database extends ContentProvider {
private static final UriMatcher sUriMatcher;
private static final int LOCATIONS_ALL = 1;
private static final int LOCATIONS_ONE = 2;
public static final String AUTHORITY = "com.xxx.realestatelocator.Locations";
public static final Uri CONTENT_URI = Uri.parse("content://" + AUTHORITY + "/locations");
public static final String DATABASE_NAME = "locations.db";
public static final int DATABASE_VERSION = 1;
public static final String CONTENT_TYPE_NOTES_ALL = "vnd.android.cursor.dir/vnd.realestate.locations";
public static final String CONTENT_TYPE_NOTES_ONE = "vnd.android.cursor.item/vnd.realestate.locations";
static {
sUriMatcher = new UriMatcher(UriMatcher.NO_MATCH);
sUriMatcher.addURI(AUTHORITY, "locations", LOCATIONS_ALL);
sUriMatcher.addURI(AUTHORITY, "locations/#", LOCATIONS_ONE);
}
// Map table columns
private static final HashMap<String, String> sNotesColumnProjectionMap;
private DatabaseHelper mDbHelper;
static {
sNotesColumnProjectionMap = new HashMap<String, String>();
sNotesColumnProjectionMap.put(LocationsTable._ID, LocationsTable._ID);
sNotesColumnProjectionMap.put(LocationsTable.LATITUDE, LocationsTable.LATITUDE);
sNotesColumnProjectionMap.put(LocationsTable.LONGITUDE, LocationsTable.LONGITUDE);
sNotesColumnProjectionMap.put(LocationsTable.LAND_ADDRESS, LocationsTable.LAND_ADDRESS);
sNotesColumnProjectionMap.put(LocationsTable.LAST_NAME, LocationsTable.LAST_NAME);
sNotesColumnProjectionMap.put(LocationsTable.FIRST_NAME, LocationsTable.FIRST_NAME);
sNotesColumnProjectionMap.put(LocationsTable.LAST_NAME_ALT, LocationsTable.LAST_NAME_ALT);
sNotesColumnProjectionMap.put(LocationsTable.FIRST_NAME_ALT, LocationsTable.FIRST_NAME_ALT);
sNotesColumnProjectionMap.put(LocationsTable.CONTACT_ADDRESS, LocationsTable.CONTACT_ADDRESS);
sNotesColumnProjectionMap.put(LocationsTable.PHONE_NUMBER, LocationsTable.PHONE_NUMBER);
sNotesColumnProjectionMap.put(LocationsTable.MOBILE_NUMBER, LocationsTable.MOBILE_NUMBER);
sNotesColumnProjectionMap.put(LocationsTable.EMAIL, LocationsTable.EMAIL);
sNotesColumnProjectionMap.put(LocationsTable.LOCATION_IMAGE, LocationsTable.LOCATION_IMAGE);
sNotesColumnProjectionMap.put(LocationsTable.TIME_STAMP_IMAGE, LocationsTable.TIME_STAMP_IMAGE);
sNotesColumnProjectionMap.put(LocationsTable.TIME_STAMP, LocationsTable.TIME_STAMP);
}
public class LocationsTable implements BaseColumns {
public static final String TABLE_NAME = "tbl_locations";
public static final String _ID = "_id";
public static final String LATITUDE = "latitude";
public static final String LONGITUDE = "longitude";
public static final String LAND_ADDRESS = "land_address";
public static final String LAST_NAME = "last_name";
public static final String FIRST_NAME = "first_name";
public static final String LAST_NAME_ALT = "last_name_alt";
public static final String FIRST_NAME_ALT = "first_name_alt";
public static final String CONTACT_ADDRESS = "contact_address";
public static final String PHONE_NUMBER = "phone_number";
public static final String MOBILE_NUMBER = "mobile_number";
public static final String EMAIL = "email_address";
public static final String LOCATION_IMAGE = "location_image";
public static final String TIME_STAMP_IMAGE = "time_stamp_image";
public static final String TIME_STAMP = "time_stamp";
} // LocationsTable inner class
private static class DatabaseHelper extends SQLiteOpenHelper {
public DatabaseHelper(Context context) {
super(context, DATABASE_NAME, null, DATABASE_VERSION);
}
private static final String SQL_QUERY_CREATE = "CREATE TABLE "
+ LocationsTable.TABLE_NAME + " (" + LocationsTable._ID + " INTEGER PRIMARY KEY AUTOINCREMENT, " + LocationsTable.LATITUDE + " TEXT NOT NULL, "
+ LocationsTable.LONGITUDE + " TEXT NOT NULL, " + LocationsTable.LAND_ADDRESS + " TEXT, " + LocationsTable.LAST_NAME + " TEXT, "
+ LocationsTable.FIRST_NAME + " TEXT, " + LocationsTable.LAST_NAME_ALT + " TEXT, " + LocationsTable.FIRST_NAME_ALT + " TEXT, "
+ LocationsTable.CONTACT_ADDRESS + " TEXT, " + LocationsTable.PHONE_NUMBER + " TEXT, " + LocationsTable.MOBILE_NUMBER + " TEXT, "
+ LocationsTable.EMAIL + " TEXT, " + LocationsTable.LOCATION_IMAGE + " TEXT, " + LocationsTable.TIME_STAMP_IMAGE + " INTEGER, "
+ LocationsTable.TIME_STAMP + " INTEGER " + ");";
private static final String SQL_QUERY_DROP = "DROP TABLE IF EXISTS " + LocationsTable.TABLE_NAME + ";";
@Override
public void onCreate(SQLiteDatabase db) {
db.execSQL(SQL_QUERY_CREATE);
} // onCreate
@Override
public void onUpgrade(SQLiteDatabase db, int oldVer, int newVer) {
db.execSQL(SQL_QUERY_DROP);
onCreate(db);
} // onUpgrade
} // DatabaseHelper inner class
@Override
public boolean onCreate() {
if(mDbHelper == null) {
mDbHelper = new DatabaseHelper(getContext());
}
return false;
}
@Override
public String getType(Uri arg0) {
return null;
} // getType
// insert one new row, full row
@Override
public Uri insert(Uri uri, ContentValues values) {
if (sUriMatcher.match(uri) != LOCATIONS_ALL) {
throw new IllegalArgumentException(" Unknown URI: " + uri);
}
SQLiteDatabase db = mDbHelper.getWritableDatabase();
long rowId = db.insert(LocationsTable.TABLE_NAME, null, values);
if (rowId > 0) {
Uri notesUri = ContentUris.withAppendedId(CONTENT_URI, rowId);
getContext().getContentResolver().notifyChange(notesUri, null);
return notesUri;
}
throw new IllegalArgumentException("<Illegal>Unknown URI: " + uri);
} // insert
@Override
public Cursor query(Uri uri, String[] projection, String selection, String[] selectionArgs, String sortOrder) {
SQLiteQueryBuilder builder = new SQLiteQueryBuilder();
switch (sUriMatcher.match(uri)) {
case LOCATIONS_ALL:
builder.setTables(LocationsTable.TABLE_NAME);
builder.setProjectionMap(sNotesColumnProjectionMap);
break;
case LOCATIONS_ONE:
builder.setTables(LocationsTable.TABLE_NAME);
builder.setProjectionMap(sNotesColumnProjectionMap);
builder.appendWhere(LocationsTable._ID + " = " + uri.getLastPathSegment());
break;
default:
throw new IllegalArgumentException("Unknown URI: " + uri);
}
SQLiteDatabase db = mDbHelper.getReadableDatabase();
Cursor queryCursor = builder.query(db, projection, selection, selectionArgs, null, null, null);
queryCursor.setNotificationUri(getContext().getContentResolver(), uri);
return queryCursor;
} // query
@Override
public int update(Uri uri, ContentValues values, String where, String[] whereArgs) {
SQLiteDatabase db = mDbHelper.getWritableDatabase();
int count = 0;
switch (sUriMatcher.match(uri)) {
case LOCATIONS_ALL:
count = db.update(LocationsTable.TABLE_NAME, values, where, whereArgs);
break;
case LOCATIONS_ONE:
String rowId = uri.getLastPathSegment();
count = db.update(LocationsTable.TABLE_NAME, values, LocationsTable._ID
+ " = " + rowId + (!TextUtils.isEmpty(where) ? " AND (" + ")" : ""), whereArgs);
default:
throw new IllegalArgumentException("Unknown URI: " + uri);
}
getContext().getContentResolver().notifyChange(uri, null);
return count;
} // update
// delete
@Override
public int delete(Uri uri, String where, String[] whereArgs) {
SQLiteDatabase db = mDbHelper.getWritableDatabase();
int count = 0;
switch (sUriMatcher.match(uri)) {
case LOCATIONS_ALL:
count = db.delete(LocationsTable.TABLE_NAME, where, whereArgs);
break;
case LOCATIONS_ONE:
String rowId = uri.getPathSegments().get(1);
count = db.delete(LocationsTable.TABLE_NAME, LocationsTable._ID + " = "
+ rowId + (!TextUtils.isEmpty(where) ? " AND (" + where + ")" : ""), whereArgs);
break;
default:
throw new IllegalArgumentException("Unknown URI: " + uri);
}
getContext().getContentResolver().notifyChange(uri, null);
return count;
} // delete
} // Database
wszelki wypadek - aby uzyskać Aktualne pozycje użyć 'DESC' zamiast' ASC' –
Także, proszę podać swój kod 'ContentProvider' –
Właśnie dodałem kod dla klasy dostawcy zawartości, Baza danych, która rozszerza ContentProvider – Kevik