get Entity Id Set from Context - Android App

Android examples for App:Context

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  4. Context

Description

get Entity Id Set from Context

Demo Code

/* /* w w w  .  j a v  a 2s.c o m*/
 * Copyright (C) 2013 The Drycake Project
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *      http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */
//package com.java2s;

import java.util.HashSet;

import java.util.Set;
import android.content.ContentResolver;

import android.content.Context;
import android.database.Cursor;

import android.net.Uri;
import android.provider.BaseColumns;

public class Main {
    private static final String[] PROJECTION_ID = new String[] { BaseColumns._ID };

    public static Set<Long> getEntityIdSet(Context context, Uri uri) {
        return getEntityIdSet(context.getContentResolver(), uri);
    }

    public static Set<Long> getEntityIdSet(ContentResolver cr, Uri uri) {
        return getEntityIdSet(cr, uri, null, null);
    }

    public static Set<Long> getEntityIdSet(Context context, Uri uri,
            String selection, String[] selectionArgs) {
        return getEntityIdSet(context.getContentResolver(), uri, selection,
                selectionArgs);
    }

    public static Set<Long> getEntityIdSet(ContentResolver cr, Uri uri,
            String selection, String[] selectionArgs) {
        Set<Long> result = new HashSet<Long>();
        Cursor cursor = null;
        try {
            cursor = cr.query(uri, PROJECTION_ID, selection, selectionArgs,
                    null);
            while (cursor.moveToNext()) {
                result.add(cursor.getLong(0));
            }
        } finally {
            if (cursor != null) {
                cursor.close();
            }
        }
        return result;
    }
}

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