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Android example source code file (ContentObservable.java)

This example Android source code file (ContentObservable.java) is included in the DevDaily.com "Java Source Code Warehouse" project. The intent of this project is to help you "Learn Android by Example" TM.

Java - Android tags/keywords

contentobservable, contentobserver, observable, override

The ContentObservable.java Android example source code

/*
 * Copyright (C) 2007 The Android Open Source 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 android.database;

/**
 * A specialization of Observable for ContentObserver that provides methods for
 * invoking the various callback methods of ContentObserver.
 */
public class ContentObservable extends Observable<ContentObserver> {

    @Override
    public void registerObserver(ContentObserver observer) {
        super.registerObserver(observer);
    }

    /**
     * invokes dispatchUpdate on each observer, unless the observer doesn't want
     * self-notifications and the update is from a self-notification
     * @param selfChange
     */
    public void dispatchChange(boolean selfChange) {
        synchronized(mObservers) {
            for (ContentObserver observer : mObservers) {
                if (!selfChange || observer.deliverSelfNotifications()) {
                    observer.dispatchChange(selfChange);
                }
            }
        }
    }

    /**
     * invokes onChange on each observer
     * @param selfChange
     */
    public void notifyChange(boolean selfChange) {
        synchronized(mObservers) {
            for (ContentObserver observer : mObservers) {
                observer.onChange(selfChange);
            }
        }
    }
}

Other Android examples (source code examples)

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