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Android example source code file (UrlRendererService.java)

This example Android source code file (UrlRendererService.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

android, annotate, annotations, app, internalcallback, iurlrenderercallback, os, override, parcelfiledescriptor, remoteexception, service_interface, string, tag, urlrendererservice, util

The UrlRendererService.java Android example source code

/*
 * Copyright (C) 2010 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.service.urlrenderer;

import android.annotation.SdkConstant;
import android.annotation.SdkConstant.SdkConstantType;
import android.app.Service;
import android.os.ParcelFileDescriptor;
import android.os.RemoteException;

import java.util.List;

/**
 * TODO(phanna): Complete documentation.
 * {@hide} while developing
 */
public abstract class UrlRendererService extends Service {
    /**
     * The {@link Intent} that must be declared as handled by the service.
     */
    @SdkConstant(SdkConstantType.SERVICE_ACTION)
    public static final String SERVICE_INTERFACE =
            "android.service.urlrenderer.UrlRendererService";

    static final String TAG = "UrlRendererService";

    private static class InternalCallback implements UrlRenderer.Callback {
        private final IUrlRendererCallback mCallback;
        InternalCallback(IUrlRendererCallback cb) {
            mCallback = cb;
        }

        public void complete(String url, ParcelFileDescriptor result) {
            try {
                mCallback.complete(url, result);
            } catch (RemoteException ex) {
            }
        }
    }

    private final IUrlRendererService.Stub mBinderInterface =
            new IUrlRendererService.Stub() {
                public void render(List<String> urls, int width, int height,
                        IUrlRendererCallback cb) {
                    processRequest(urls, width, height,
                            new InternalCallback(cb));
                }
            };

    /**
     * Implement to return the implementation of the internal accessibility
     * service interface.  Subclasses should not override.
     */
    @Override
    public final android.os.IBinder onBind(android.content.Intent intent) {
        return mBinderInterface;
    }

    /**
     * When all clients unbind from the service, stop the service.  Subclasses
     * should not override.
     */
    @Override
    public final boolean onUnbind(android.content.Intent intent) {
        stopSelf();
        return false;
    }

    /**
     * Subclasses implement this function to process the given urls.  When each
     * url is complete, the subclass must invoke the callback with the result.
     * @param urls  A list of urls to render at the given dimensions.
     * @param width  The desired width of the result.
     * @param height  The desired height of the result.
     * @param cb  The callback to invoke when each url is complete.
     */
    public abstract void processRequest(List<String> urls, int width,
            int height, UrlRenderer.Callback cb);
}

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