Android Open Source - WAIDProfiler Listener Fragment

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License

The source code is released under:

GNU General Public License

Java Source Code

/**
 * /*from  w  w  w.jav  a  2s.  c  om*/
 */
package it.unibo.cs.jonus.waidprof;

import it.unibo.cs.jonus.waidprof.ListenerService.ListenerServiceBinder;
import android.content.ComponentName;
import android.content.Context;
import android.content.Intent;
import android.content.ServiceConnection;
import android.content.SharedPreferences;
import android.os.Bundle;
import android.os.IBinder;
import android.preference.PreferenceManager;
import android.app.Fragment;
import android.util.Log;
import android.view.LayoutInflater;
import android.view.View;
import android.view.View.OnClickListener;
import android.view.ViewGroup;
import android.widget.ImageView;

/**
 * @author jei
 * 
 */
public class ListenerFragment extends Fragment {

  private static final int MODE_IDLE = 0;
  private static final int MODE_RUNNING = 1;

  // UI elements
  private ImageView onoffView;
  private ImageView vehicleView;
  // UI variables
  private String currentClassification;

  // Service variables
  private boolean mBound = false;

  private SharedPreferences sharedPrefs;

  private ListenerServiceListener mListener = new ListenerServiceListener() {

    @Override
    public void sendCurrentEvaluation(VehicleInstance evaluation) {
      // TODO add this classification to the listview?
    }

    @Override
    public void sendPredictedVehicle(String vehicle) {
      // Update image only if needed
      if (!vehicle.equals(currentClassification)) {
        if (ProfilerActivity.sVehiclesMap.containsKey(vehicle)) {
          vehicleView.setImageBitmap(ProfilerActivity.sVehiclesMap
              .get(vehicle));
          currentClassification = vehicle;
        } else {
          vehicleView.setImageBitmap(ProfilerActivity.sVehiclesMap
              .get("none"));
          currentClassification = vehicle;
        }
      }
    }

  };

  /** Defines callbacks for service binding, passed to bindService() */
  private ServiceConnection mConnection = new ServiceConnection() {

    @Override
    public void onServiceDisconnected(ComponentName arg0) {
      mBound = false;
    }

    @Override
    public void onServiceConnected(ComponentName name, IBinder service) {
      ListenerServiceBinder binder = (ListenerServiceBinder) service;
      binder.setListener(mListener);
      mBound = true;

    }
  };

  public ListenerFragment() {

  }

  @Override
  public void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);

    // Get shared preferences
    sharedPrefs = PreferenceManager.getDefaultSharedPreferences(this
        .getActivity());

    // Set initial classification
    currentClassification = "none";
  }

  @Override
  public View onCreateView(LayoutInflater inflater, ViewGroup container,
      Bundle savedInstanceState) {
    View rootView = inflater.inflate(R.layout.fragment_listener, container,
        false);

    // Set service start/stop buttons and callbacks
    onoffView = (ImageView) rootView.findViewById(R.id.onoffView);
    vehicleView = (ImageView) rootView.findViewById(R.id.vehicleView);
    onoffView.setOnClickListener(new OnClickListener() {
      @Override
      public void onClick(View v) {
        startListenerService(v);
      }
    });
    vehicleView.setOnClickListener(new OnClickListener() {
      @Override
      public void onClick(View v) {
        stopListenerService(v);
      }
    });

    return rootView;
  }

  @Override
  public void onResume() {
    super.onResume();

    // Check ListenerService status
    boolean isServiceRunning = sharedPrefs.getBoolean(
        ListenerService.KEY_SERVICE_ISRUNNING, false);

    if (isServiceRunning && !mBound) {
      Log.v("ListenerFragment", "Reconnecting to service");
      // Bind to the running service
      Intent intent = new Intent(getActivity(), ListenerService.class);
      getActivity().bindService(intent, mConnection,
          Context.BIND_AUTO_CREATE);

      setUIMode(MODE_RUNNING);
    } else {
      setUIMode(MODE_IDLE);
    }
  }

  @Override
  public void onPause() {
    // Unbind from the service
    if (mBound) {
      getActivity().unbindService(mConnection);
      mBound = false;
    }

    super.onPause();
  }

  /**
   * Launches ListenerService and binds the fragment to it
   * 
   * @param view
   */
  public void startListenerService(View view) {
    // Check ListenerService status
    boolean isServiceRunning = sharedPrefs.getBoolean(
        ListenerService.KEY_SERVICE_ISRUNNING, false);

    if (!isServiceRunning) {
      // Start the service and bind to it
      Intent intent = new Intent(getActivity(), ListenerService.class);
      getActivity().startService(intent);
      getActivity().bindService(intent, mConnection,
          Context.BIND_AUTO_CREATE);

      // Change the UI mode
      setUIMode(MODE_RUNNING);
    }
  }

  /**
   * Unbinds from ListenerService and stops it
   * 
   * @param view
   */
  public void stopListenerService(View view) {
    // Check ListenerService status
    boolean isServiceRunning = sharedPrefs.getBoolean(
        ListenerService.KEY_SERVICE_ISRUNNING, false);

    if (isServiceRunning) {
      // Unbind from the service and stop it
      getActivity().unbindService(mConnection);
      mBound = false;
      Intent intent = new Intent(getActivity(), ListenerService.class);
      getActivity().stopService(intent);

      // XXX Set the service state in the shared prefs
      sharedPrefs.edit().putBoolean(
          ListenerService.KEY_SERVICE_ISRUNNING, false);

      // Change the UI mode
      setUIMode(MODE_IDLE);

      currentClassification = "none";
    }
  }

  /**
   * Sets the UI elements according to the specified mode
   * 
   * @param mode
   */
  private void setUIMode(int mode) {
    switch (mode) {
    case MODE_IDLE:
      onoffView.setVisibility(View.VISIBLE);
      vehicleView.setVisibility(View.INVISIBLE);
      vehicleView.setImageResource(R.drawable.none_00b0b0);
      break;
    case MODE_RUNNING:
      onoffView.setVisibility(View.INVISIBLE);
      vehicleView.setVisibility(View.VISIBLE);
      break;
    }
  }

}

Java Source Code List

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