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RssContentProvider.javaAPI DocAndroid 1.5 API8099Wed May 06 22:41:08 BST 2009com.example.codelab.rssexample

RssContentProvider

public class RssContentProvider extends android.content.ContentProvider

Fields Summary
private Logger
mLogger
private android.database.sqlite.SQLiteDatabase
mDb
private DatabaseHelper
mDbHelper
private static final String
DATABASE_NAME
private static final String
DATABASE_TABLE_NAME
private static final int
DB_VERSION
private static final int
ALL_MESSAGES
private static final int
SPECIFIC_MESSAGE
private static final android.content.UriMatcher
URI_MATCHER
public static final android.net.Uri
CONTENT_URI
public static final String
ID
public static final String
URL
public static final String
TITLE
public static final String
HAS_BEEN_READ
public static final String
CONTENT
public static final String
LAST_UPDATED
public static final String
DEFAULT_SORT_ORDER
Constructors Summary
Methods Summary
public intdelete(android.net.Uri uri, java.lang.String where)

        // NOTE Argument checking code omitted. Check your parameters!
        int rowCount = mDb.delete(DATABASE_TABLE_NAME, ID + " = " + uri.getPathLeafId());

        // Notify any listeners and return the deleted row count.
        getContext().getContentResolver().notifyDelete(uri, null);
        return rowCount;
public java.lang.StringgetType(android.net.Uri uri)

        switch (URI_MATCHER.match(uri)){
            case ALL_MESSAGES:
                return "vnd.android.cursor.dir/rssitem"; // List of items.
            case SPECIFIC_MESSAGE:
                return "vnd.android.cursor.item/rssitem";     // Specific item.
            default:
                return null;
        }
public android.net.Uriinsert(android.net.Uri requestUri, android.content.ContentValues initialValues)

        // NOTE Argument checking code omitted. Check your parameters! Check that
        // your row addition request succeeded!

       long rowId = -1;
       rowId = mDb.insert(DATABASE_TABLE_NAME, "rawcontent", initialValues);
       Uri newUri = CONTENT_URI.addId(rowId);

       // Notify any listeners and return the URI of the new row.
       getContext().getContentResolver().notifyInsert(CONTENT_URI, null);
       return newUri;
public booleanonCreate()

        // First we need to open the database. If this is our first time,
        // the attempt to retrieve a database will throw
        // FileNotFoundException, and we will then create the database.
        final Context con = getContext();
        try{
            mDb = mDbHelper.openDatabase(getContext(), DATABASE_NAME, null, DB_VERSION);
            mLogger.info("RssContentProvider.onCreate(): Opened a database");
        } catch (Exception ex) {
              return false;
        }
        if(mDb == null){
            return false;
        } else {
            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 groupBy, java.lang.String having, java.lang.String sortOrder)

        // We won't bother checking the validity of params here, but you should!

        // SQLiteQueryBuilder is the helper class that creates the
        // proper SQL syntax for us.
        SQLiteQueryBuilder qBuilder = new SQLiteQueryBuilder();

        // Set the table we're querying.
        qBuilder.setTables(DATABASE_TABLE_NAME);

        // If the query ends in a specific record number, we're
        // being asked for a specific record, so set the
        // WHERE clause in our query.
        if((URI_MATCHER.match(uri)) == SPECIFIC_MESSAGE){
            qBuilder.appendWhere("_id=" + uri.getPathLeafId());
        }

        // Set sort order. If none specified, use default.
        if(TextUtils.isEmpty(sortOrder)){
            sortOrder = DEFAULT_SORT_ORDER;
        }

        // Make the query.
        Cursor c = qBuilder.query(mDb,
                projection,
                selection,
                selectionArgs,
                groupBy,
                having,
                sortOrder);
        c.setNotificationUri(getContext().getContentResolver(), uri);
        return c;
public intupdate(android.net.Uri uri, android.content.ContentValues values, java.lang.String whereClause)

        // NOTE Argument checking code omitted. Check your parameters!
        int updateCount = mDb.update(DATABASE_TABLE_NAME, values, whereClause);

        // Notify any listeners and return the updated row count.
        getContext().getContentResolver().notifyUpdate(uri, null);
        return updateCount;