remoteservicecontroller.java

Google s android SDK

/* 
 * Copyright (C) 2007 Google Inc.
 *
 * 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.google.android.samples.app;

// Need the following import to get access to the app resources, since this
// class is in a sub-package.
import com.google.android.samples.R;

import android.app.Activity;
import android.content.ComponentName;
import android.content.Intent;
import android.os.Bundle;
import android.view.View;
import android.view.View.OnClickListener;
import android.widget.Button;


/**
 * <p>Example of explicitly starting and stopping the {@link RemoteService}.
 * This demonstrates the implementation of a service that runs in a separate
process from the rest of the application, which is explicitly started and stopped
as desired.</p>

<h4>Demo</h4>
App/Service/Remote Service Controller
 
<h4>Source files</h4>
<table class="LinkTable">
        <tr>
            <td class="LinkColumn">src/com/google/android/samples/app/RemoteServiceController.java</td>
            <td class="DescrColumn">The Remote Service Controller implementation</td>
        </tr>
        <tr>
            <td class="LinkColumn">src/com/google/android/samples/app/RemoteService.java</td>
            <td class="DescrColumn">The implementation of the service itself</td>
        </tr>
        <tr>
            <td class="LinkColumn">/res/any/layout/local_service_controller.xml</td>
            <td class="DescrColumn">Defines contents of the screen</td>
        </tr>
</table>

 */
public class RemoteServiceController extends Activity
{
    @Override
	protected void onCreate(Bundle icicle)
    {
        super.onCreate(icicle);

        setContentView(R.layout.remote_service_controller);

        // Watch for button clicks.
        Button button = (Button)findViewById(R.id.start);
        button.setOnClickListener(mStartListener);
        button = (Button)findViewById(R.id.stop);
        button.setOnClickListener(mStopListener);
    }

    private OnClickListener mStartListener = new OnClickListener()
    {
        public void onClick(View v)
        {
            // Make sure the service is started.  It will continue running
            // until someone calls stopService().
            startService(new Intent(RemoteServiceController.this, 
                    RemoteService.class), null);
        }
    };

    private OnClickListener mStopListener = new OnClickListener()
    {
        public void onClick(View v)
        {
            // Cancel a previous call to startService().  Note that the
            // service will not actually stop at this point if there are
            // still bound clients.
            stopService(new Intent(RemoteServiceController.this, 
                    RemoteService.class));
        }
    };
}