ItemProvider.java

package com.nononsenseapps.notepad.database;

import android.content.ContentProvider;
import android.content.ContentValues;
import android.content.UriMatcher;
import android.database.Cursor;
import android.net.Uri;

public class ItemProvider extends ContentProvider {
    public static final String AUTHORITY = "com.nononsenseapps.notepad.database.AUTHORITY";
    public static final String SCHEME = "content://";

    private static final UriMatcher sURIMatcher = new UriMatcher(
            UriMatcher.NO_MATCH);
    static {
        taskviewItem.addMatcherUris(sURIMatcher);
    }

    @Override
    public boolean onCreate() {
        return true;
    }


    @Override
    public int delete(Uri uri, String selection, String[] selectionArgs) {
        // Setup some common parsing and stuff
        final String table;
        final ContentValues values = new ContentValues();
        final ArrayList<String> args = new ArrayList<String>();
        if (selectionArgs != null) {
            for (String arg : selectionArgs) {
                args.add(arg);
            }
        }
        final StringBuilder sb = new StringBuilder();
        if (selection != null && !selection.isEmpty()) {
            sb.append("(").append(selection).append(")");
        }

        // Configure table and args depending on uri
        switch (sURIMatcher.match(uri)) {
        
        case taskviewItem.BASEITEMCODE:
            table = taskviewItem.TABLE_NAME;
            if (selection != null && !selection.isEmpty()) {
                sb.append(" AND ");
            }
            sb.append(taskviewItem.COL_ID + " IS ?");
            args.add(uri.getLastPathSegment());
            // Alternative is this
            // values.put(taskviewItem.COL_DELETED, 1);
            break;

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

        // Write to DB
        final SQLiteDatabase db = DatabaseHandler.getInstance(getContext())
                .getWritableDatabase();
        final String[] argArray = new String[args.size()];
        final int result = db.delete(table, sb.toString(),
                args.toArray(argArray));
        // Or alternatively
        //final int result = db.update(table, values, sb.toString(),
        //        args.toArray(argArray));

        if (result > 0) {
            // Support upload sync
            getContext().getContentResolver().notifyChange(uri, null, true);
        }
        return result;
    }

    @Override
    public Uri insert(Uri uri, ContentValues values) {
        // TODO: Implement this to handle requests to insert a new row.
        throw new UnsupportedOperationException("Not yet implemented");
    }

    @Override
    public int update(Uri uri, ContentValues values, String selection,
            String[] selectionArgs) {
        // TODO: Implement this to handle requests to update one or more rows.
        throw new UnsupportedOperationException("Not yet implemented");
    }

    @Override
    public String getType(Uri uri) {
        switch (sURIMatcher.match(uri)) {
        
        case taskviewItem.BASEITEMCODE:
            return taskviewItem.TYPE_ITEM;
        case taskviewItem.BASEURICODE:
            return taskviewItem.TYPE_DIR;
        default:
            throw new IllegalArgumentException("Unknown URI " + uri);
        }
    }

    @Override
    public Cursor query(Uri uri, String[] projection, String selection,
            String[] args, String sortOrder) {
        Cursor result = null;
        final long id;
        final DatabaseHandler handler = DatabaseHandler.getInstance(getContext());

        switch (sURIMatcher.match(uri)) {
        
        case taskviewItem.BASEITEMCODE:
            id = Long.parseLong(uri.getLastPathSegment());
            result = handler.gettaskviewItemCursor(id);
            result.setNotificationUri(getContext().getContentResolver(), uri);
            break;
        case taskviewItem.BASEURICODE:
            result = handler.getAlltaskviewItemsCursor(selection, args, sortOrder);
            result.setNotificationUri(getContext().getContentResolver(), uri);
            break;

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

        return result;
    }
}