DeviceDiscovery.java :  » UnTagged » amarino » at » abraxas » amarino » Android Open Source

/*
  Amarino - A prototyping software toolkit for Android and Arduino
  Copyright (c) 2010 Bonifaz Kaufmann.  All right reserved.
  
  This application and its library is free software; you can redistribute
  it and/or modify it under the terms of the GNU Lesser General Public
  License as published by the Free Software Foundation; either
  version 3 of the License, or (at your option) any later version.

  This library is distributed in the hope that it will be useful,
  but WITHOUT ANY WARRANTY; without even the implied warranty of
  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  Lesser General Public License for more details.

  You should have received a copy of the GNU Lesser General Public
  License along with this library; if not, write to the Free Software
  Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA  02110-1301  USA
*/
package at.abraxas.amarino;

import it.gerdavax.easybluetooth.LocalDevice;
import it.gerdavax.easybluetooth.ReadyListener;
import it.gerdavax.easybluetooth.RemoteDevice;
import it.gerdavax.easybluetooth.ScanListener;

import java.util.Vector;

import android.app.ListActivity;
import android.content.Context;
import android.content.Intent;
import android.os.Bundle;
import android.util.Log;
import android.view.LayoutInflater;
import android.view.View;
import android.view.ViewGroup;
import android.view.Window;
import android.widget.BaseAdapter;
import android.widget.LinearLayout;
import android.widget.ListView;
import android.widget.TextView;

/**
 * This ListActivity initiates a Bluetooth device discovery
 * and shows a list of all discovered devices. 
 * 
 * 
 * Call this Activity using startActivityForResult, 
 * and it will returns the selected device address. 
 * Attached to the intent as an extra called ADDRESS_EXTRA.
 * 
 * @author Bonifaz Kaufmann
 * 
 * $Id: DeviceDiscovery.java 444 2010-06-10 13:11:59Z abraxas $
 * 
 */
public class DeviceDiscovery extends ListActivity {
  
  protected static String ADDRESS_EXTRA = "device_address";
  
  @SuppressWarnings("unused")
  private static final String TAG = "DeviceDiscovery";
  
  private DeviceAdapter adapter;
  private LocalDevice localDevice;

  @Override
  protected void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    setTitle("Discovered Devices");
    requestWindowFeature(Window.FEATURE_INDETERMINATE_PROGRESS);
    setContentView(R.layout.discovered_devices_list);

    adapter = new DeviceAdapter();
    setListAdapter(adapter);
    
    setProgressBarIndeterminateVisibility(true);
    localDevice = LocalDevice.getInstance();
  }

  @Override
  protected void onStart() {
    super.onStart();

        localDevice.init(this, new ReadyListener(){

          @Override
      public void ready() {
        localDevice.scan(new ScanListener(){
          
          @Override
          public void deviceFound(RemoteDevice device) {
            
            synchronized(adapter.discoveredDevices){
              Vector<RemoteDevice> addedDevices = adapter.discoveredDevices;
              for (RemoteDevice rd : addedDevices){
                if (rd.getAddress().equals(device.getAddress())){
                  Log.d(TAG, "device already in list -> renew");
                  adapter.discoveredDevices.remove(rd);
                }
              }
              adapter.discoveredDevices.add(device);
            }
            adapter.notifyDataSetChanged();
          }

          @Override
          public void scanCompleted() {
            setProgressBarIndeterminateVisibility(false);
          }
        });
      } // end ready()
        });
        
  }

  
  @Override
  protected void onStop() {
    super.onStop();
    // TODO change source of AndroidBluetoothLibrary to fix the bug
    // this might run in an exception, because of a race condition
    // see issue 22 at http://code.google.com/p/android-bluetooth/issues/detail?id=22
    localDevice.destroy();
  }


  @Override
  protected void onListItemClick(ListView lv, View view, int position, long id) {
    super.onListItemClick(lv, view, position, id);
    // since user selected already a device we do not need to scan for more devices
    localDevice.stopScan();
    
    final String address = ((RemoteDevice)adapter.getItem(position)).getAddress();
    Intent i = new Intent();
    i.putExtra(ADDRESS_EXTRA, address);
    setResult(RESULT_OK, i);
    finish();
  }
  

  private class DeviceAdapter extends BaseAdapter {
    
    Vector<RemoteDevice> discoveredDevices = new Vector<RemoteDevice>();

    public int getCount() {
      if (discoveredDevices != null) {
        return discoveredDevices.size();
      }
      return 0;
    }

    public Object getItem(int position) {
      return discoveredDevices.get(position);
    }

    public long getItemId(int position) {
      return 0;
    }

    public View getView(int position, View convertView, ViewGroup parent) {
      LinearLayout view = null;

      if (convertView == null) {
        view = new LinearLayout(DeviceDiscovery.this);
        String inflater = Context.LAYOUT_INFLATER_SERVICE;
        LayoutInflater vi = (LayoutInflater) DeviceDiscovery.this.getSystemService(inflater);
        vi.inflate(R.layout.discovered_devices_list_item, view, true);
      } else {
        view = (LinearLayout) convertView;
      }

      TextView addressTextView = (TextView) view.findViewById(R.id.device_address);
      TextView nameTextView = (TextView) view.findViewById(R.id.device_name);
      
      RemoteDevice device = discoveredDevices.get(position);
      String address = device.getAddress();
      String name = device.getFriendlyName();
      
      addressTextView.setText(address);
      nameTextView.setText((name==null) ? "NONAME" : name);

      return view;
    }
  }
  
}