Android Open Source - Fall_Prevention_2013 Launch Activity

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The source code is released under:

Apache License

Java Source Code

/*******************************************************************************
 * Licensed to UbiCollab.org under one or more contributor
 * license agreements.  See the NOTICE file distributed 
 * with this work for additional information regarding
 * copyright ownership. UbiCollab.org licenses this file
 * to you 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
 * /*from   w w  w .  j a  va2 s  . c om*/
 *     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 ntnu.stud.valens.stepdetector;

import ntnu.stud.valens.stepdetector.R;
import ntnu.stud.valens.stepdetector.calibration.CalibrationActivity;
import android.app.Activity;
import android.app.ActivityManager;
import android.app.ActivityManager.RunningServiceInfo;
import android.content.Context;
import android.content.Intent;
import android.os.Bundle;
import android.view.View;
import android.widget.Button;


/**
 * The Launch activity for the service app. Started when the app is run,
 * provides a basic interface for starting and stopping the service.
 * 
 * @author Elias
 * 
 */
public class LaunchActivity extends Activity {

  @Override
  protected void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    setContentView(R.layout.activity_launch);
  }

  @Override
  protected void onResume() {
    super.onResume();
    
    // Enables only the correct button    
    Button startButton = (Button)findViewById(R.id.btnStoreData);
    Button stopButton = (Button)findViewById(R.id.btnStopData);
    
    if (isMyServiceRunning()) {
      startButton.setEnabled(false);
      stopButton.setEnabled(true);
    } else {
      startButton.setEnabled(true);
      stopButton.setEnabled(false);
    }
    
  }
  
  /**
   * Called when the "start"-button is pressed. Makes an intent, and starts
   * the service wit parameter "stop" = false, so that the service knows that
   * it should start, not stop.
   * 
   * @param View
   *            - Provided by the code that calls onClick-events
   */
  public void startMain(View view) {
    Intent intent = new Intent(this, StepMainService.class);
    intent.putExtra("stop", false);
    startService(intent);
    
    Button startButton = (Button)findViewById(R.id.btnStoreData);
    Button stopButton = (Button)findViewById(R.id.btnStopData);
    
    startButton.setEnabled(false);
    stopButton.setEnabled(true);
  }

  /**
   * Called when the "stop"-button is pressed. Builds an intent to send the
   * message "stop" = true to the service. The intent then calls the
   * onStartCommand()-method of the StepMainService
   * 
   * @param View
   *            - Provided by the code that calls onClick-events
   */
  public void stopMain(View view) {
    Intent intent = new Intent(this, StepMainService.class);
    intent.putExtra("stop", true);
    startService(intent);
    
    Button startButton = (Button)findViewById(R.id.btnStoreData);
    Button stopButton = (Button)findViewById(R.id.btnStopData);
    
    startButton.setEnabled(true);
    stopButton.setEnabled(false);
  }

  /**
   * Called when the "calibrate"-button is pressed. Starts the calibrate activity.
   * 
   * @param View
   *            - Provided by the code that calls onClick-events
   */
  public void calibrate(View view) {
    Intent intent = new Intent(this, CalibrationActivity.class);
    startActivity(intent);
  }
  
  /**
   * A method to see if a Valens Step Detector Service is running or not.
   * 
   * @return A boolean that is true if there is a service running, false otherwise.
   */
  private boolean isMyServiceRunning() {
      ActivityManager manager = (ActivityManager) getSystemService(Context.ACTIVITY_SERVICE);
      for (RunningServiceInfo service : manager.getRunningServices(Integer.MAX_VALUE)) {
          if (StepMainService.class.getName().equals(service.service.getClassName())) {
              return true;
          }
      }
      return false;
  }
}

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