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NotePadProvider.javaAPI DocAndroid 1.5 API8506Wed May 06 22:41:08 BST 2009com.example.android.notepad

NotePadProvider

public class NotePadProvider extends android.content.ContentProvider
Provides access to a database of notes. Each note has a title, the note itself, a creation date and a modified data.

Fields Summary
private static final String
TAG
private static final String
DATABASE_NAME
private static final int
DATABASE_VERSION
private static final String
NOTES_TABLE_NAME
private static HashMap
sNotesProjectionMap
private static final int
NOTES
private static final int
NOTE_ID
private static final android.content.UriMatcher
sUriMatcher
private DatabaseHelper
mOpenHelper
Constructors Summary
Methods Summary
public intdelete(android.net.Uri uri, java.lang.String where, java.lang.String[] whereArgs)

        SQLiteDatabase db = mOpenHelper.getWritableDatabase();
        int count;
        switch (sUriMatcher.match(uri)) {
        case NOTES:
            count = db.delete(NOTES_TABLE_NAME, where, whereArgs);
            break;

        case NOTE_ID:
            String noteId = uri.getPathSegments().get(1);
            count = db.delete(NOTES_TABLE_NAME, Notes._ID + "=" + noteId
                    + (!TextUtils.isEmpty(where) ? " AND (" + where + ')" : ""), whereArgs);
            break;

        default:
            throw new IllegalArgumentException("Unknown URI " + uri);
        }

        getContext().getContentResolver().notifyChange(uri, null);
        return count;
public java.lang.StringgetType(android.net.Uri uri)

        switch (sUriMatcher.match(uri)) {
        case NOTES:
            return Notes.CONTENT_TYPE;

        case NOTE_ID:
            return Notes.CONTENT_ITEM_TYPE;

        default:
            throw new IllegalArgumentException("Unknown URI " + uri);
        }
public android.net.Uriinsert(android.net.Uri uri, android.content.ContentValues initialValues)

        // Validate the requested uri
        if (sUriMatcher.match(uri) != NOTES) {
            throw new IllegalArgumentException("Unknown URI " + uri);
        }

        ContentValues values;
        if (initialValues != null) {
            values = new ContentValues(initialValues);
        } else {
            values = new ContentValues();
        }

        Long now = Long.valueOf(System.currentTimeMillis());

        // Make sure that the fields are all set
        if (values.containsKey(NotePad.Notes.CREATED_DATE) == false) {
            values.put(NotePad.Notes.CREATED_DATE, now);
        }

        if (values.containsKey(NotePad.Notes.MODIFIED_DATE) == false) {
            values.put(NotePad.Notes.MODIFIED_DATE, now);
        }

        if (values.containsKey(NotePad.Notes.TITLE) == false) {
            Resources r = Resources.getSystem();
            values.put(NotePad.Notes.TITLE, r.getString(android.R.string.untitled));
        }

        if (values.containsKey(NotePad.Notes.NOTE) == false) {
            values.put(NotePad.Notes.NOTE, "");
        }

        SQLiteDatabase db = mOpenHelper.getWritableDatabase();
        long rowId = db.insert(NOTES_TABLE_NAME, Notes.NOTE, values);
        if (rowId > 0) {
            Uri noteUri = ContentUris.withAppendedId(NotePad.Notes.CONTENT_URI, rowId);
            getContext().getContentResolver().notifyChange(noteUri, null);
            return noteUri;
        }

        throw new SQLException("Failed to insert row into " + uri);
public booleanonCreate()

        mOpenHelper = new DatabaseHelper(getContext());
        return true;
public android.database.Cursorquery(android.net.Uri uri, java.lang.String[] projection, java.lang.String selection, java.lang.String[] selectionArgs, java.lang.String sortOrder)

        SQLiteQueryBuilder qb = new SQLiteQueryBuilder();

        switch (sUriMatcher.match(uri)) {
        case NOTES:
            qb.setTables(NOTES_TABLE_NAME);
            qb.setProjectionMap(sNotesProjectionMap);
            break;

        case NOTE_ID:
            qb.setTables(NOTES_TABLE_NAME);
            qb.setProjectionMap(sNotesProjectionMap);
            qb.appendWhere(Notes._ID + "=" + uri.getPathSegments().get(1));
            break;

        default:
            throw new IllegalArgumentException("Unknown URI " + uri);
        }

        // If no sort order is specified use the default
        String orderBy;
        if (TextUtils.isEmpty(sortOrder)) {
            orderBy = NotePad.Notes.DEFAULT_SORT_ORDER;
        } else {
            orderBy = sortOrder;
        }

        // Get the database and run the query
        SQLiteDatabase db = mOpenHelper.getReadableDatabase();
        Cursor c = qb.query(db, projection, selection, selectionArgs, null, null, orderBy);

        // Tell the cursor what uri to watch, so it knows when its source data changes
        c.setNotificationUri(getContext().getContentResolver(), uri);
        return c;
public intupdate(android.net.Uri uri, android.content.ContentValues values, java.lang.String where, java.lang.String[] whereArgs)

        SQLiteDatabase db = mOpenHelper.getWritableDatabase();
        int count;
        switch (sUriMatcher.match(uri)) {
        case NOTES:
            count = db.update(NOTES_TABLE_NAME, values, where, whereArgs);
            break;

        case NOTE_ID:
            String noteId = uri.getPathSegments().get(1);
            count = db.update(NOTES_TABLE_NAME, values, Notes._ID + "=" + noteId
                    + (!TextUtils.isEmpty(where) ? " AND (" + where + ')" : ""), whereArgs);
            break;

        default:
            throw new IllegalArgumentException("Unknown URI " + uri);
        }

        getContext().getContentResolver().notifyChange(uri, null);
        return count;