Android Open Source - NXTControl Activity Device List

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License

The source code is released under:

GNU General Public License

Java Source Code

//
//    NXT Control
//    Copyright (c) 2013 Carlos Rafael Gimenes das Neves
///*from  ww  w  .j av  a 2s . co  m*/
//    This program is free software: you can redistribute it and/or modify
//    it under the terms of the GNU General Public License as published by
//    the Free Software Foundation, either version 3 of the License, or
//    (at your option) any later version.
//
//    This program 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 General Public License for more details.
//
//    You should have received a copy of the GNU General Public License
//    along with this program. If not, see {http://www.gnu.org/licenses/}.
//
//    https://github.com/BandTec/NXTControl
//
package br.com.bandtec.nxtcontrol;

import java.util.Set;

import android.bluetooth.BluetoothAdapter;
import android.bluetooth.BluetoothDevice;
import android.content.BroadcastReceiver;
import android.content.Context;
import android.content.Intent;
import android.content.IntentFilter;
import android.os.Bundle;
import android.view.View;
import android.widget.AdapterView;
import br.com.bandtec.nxtcontrol.activity.ClientActivity;
import br.com.bandtec.nxtcontrol.list.BaseList;
import br.com.bandtec.nxtcontrol.list.DeviceItem;
import br.com.bandtec.nxtcontrol.ui.BgButton;
import br.com.bandtec.nxtcontrol.ui.BgListView;
import br.com.bandtec.nxtcontrol.ui.BgTextView;
import br.com.bandtec.nxtcontrol.ui.UI;

public class ActivityDeviceList extends ClientActivity implements AdapterView.OnItemClickListener, View.OnClickListener {
  public static final String PAIRING = "pairing";
  public static final String DEVICE_NAME_AND_ADDRESS = "device_infos";
  public static final String EXTRA_DEVICE_ADDRESS = "device_address";
  private BluetoothAdapter btAdapter;
  private BgButton btnRefresh;
  private BaseList<DeviceItem> deviceList;
  private BroadcastReceiver receiver;
  
  @Override
  protected void onCreate() {
    setContentView(R.layout.activity_device_list);
    
    ((BgTextView)findViewById(R.id.txtDevices)).setTextColor(UI.colorState_current);
    
    final BgListView list = (BgListView)findViewById(R.id.list);
    deviceList = new BaseList<DeviceItem>(DeviceItem.class);
    deviceList.setObserver(list);
    list.setOnItemClickListener(this);
    btnRefresh = (BgButton)findViewById(R.id.btnRefresh);
    btnRefresh.setOnClickListener(this);
    btnRefresh.setIcon(UI.ICON_REFRESH);
    if (UI.isLowDpiScreen) {
      findViewById(R.id.panelControls).setPadding(UI._8dp, 0, 0, 0);
      findViewById(R.id.panelScanning).setPadding(UI._8dp, UI._8dp, UI._8dp, UI._8dp);
    }
    
    receiver = new BroadcastReceiver() {
      @Override
      public void onReceive(Context context, Intent intent) {
        if (deviceList == null)
          return;
        final String action = intent.getAction();
        if (BluetoothDevice.ACTION_FOUND.equals(action)) {
          final BluetoothDevice device = intent.getParcelableExtra(BluetoothDevice.EXTRA_DEVICE);
          final String address = device.getAddress();
          if (address.startsWith(BTCommunicator.OUI_LEGO)) {
            boolean paired = false;
            for (int i = deviceList.getCount() - 1; i >= 0; i--) {
              if (deviceList.getItemT(i).address.equals(address)) {
                paired = deviceList.getItemT(i).paired;
                deviceList.setSelection(i, false);
                deviceList.removeSelection();
                break;
              }
            }
            final String name = device.getName();
            deviceList.add(new DeviceItem(((name == null || name.length() == 0) ? getText(R.string.null_device_name).toString() : name) + " - " + address, address, paired), -1);
          }
        } else if (BluetoothAdapter.ACTION_DISCOVERY_FINISHED.equals(action)) {
          if (btnRefresh != null)
            btnRefresh.setVisibility(View.VISIBLE);
          findViewById(R.id.panelScanning).setVisibility(View.GONE);
          if (deviceList.getCount() == 0)
            deviceList.add(new DeviceItem(getText(R.string.none_found).toString(), null, false), -1);
        }
      }
    };
    
    IntentFilter filter = new IntentFilter(BluetoothDevice.ACTION_FOUND);
    getHostActivity().registerReceiver(receiver, filter);
    filter = new IntentFilter(BluetoothAdapter.ACTION_DISCOVERY_FINISHED);
    getHostActivity().registerReceiver(receiver, filter);
    
    btAdapter = BluetoothAdapter.getDefaultAdapter();
    final Set<BluetoothDevice> pairedDevices = btAdapter.getBondedDevices();
    if (pairedDevices.size() > 0) {
      for (BluetoothDevice device : pairedDevices) {
        if (device.getAddress().startsWith(BTCommunicator.OUI_LEGO))
          deviceList.add(new DeviceItem(device.getName() + " - " + device.getAddress(), device.getAddress(), true), -1);
      }
    }
        if (btAdapter.isDiscovering())
          btAdapter.cancelDiscovery();
        btAdapter.startDiscovery();
  }
  
  @Override
  protected void onDestroy() {
    btnRefresh = null;
    if (btAdapter != null) {
      btAdapter.cancelDiscovery();
      btAdapter = null;
    }
    if (receiver != null) {
      getHostActivity().unregisterReceiver(receiver);
      receiver = null;
    }
    if (deviceList != null) {
      deviceList.setObserver(null);
      deviceList = null;
    }
  }
  
  @Override
  public void onClick(View view) {
    if (view == btnRefresh) {
          if (btAdapter == null)
            return;
      if (btAdapter.isDiscovering())
            btAdapter.cancelDiscovery();
          btAdapter.startDiscovery();
      btnRefresh.setVisibility(View.GONE);
      findViewById(R.id.panelScanning).setVisibility(View.VISIBLE);
    }
  }
  
  @Override
  public void onItemClick(AdapterView<?> parentView, View childView, int position, long id) {
    if (position < 0)
      return;
    if (btAdapter != null) {
      btAdapter.cancelDiscovery();
      btAdapter = null;
    }
    final DeviceItem item = deviceList.getItemT(position);
    if (item.address == null || item.address.length() < 17)
      return;
    final Intent intent = new Intent();
    final Bundle data = new Bundle();
    data.putString(DEVICE_NAME_AND_ADDRESS, item.description);
    data.putString(EXTRA_DEVICE_ADDRESS, item.address);
    data.putBoolean(PAIRING, !item.paired);
    intent.putExtras(data);
    finish(1, intent);
  }
}

Java Source Code List

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