Android Open Source - ardusonar List Devices

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License

The source code is released under:

GNU Lesser General Public License

Java Source Code

/**
Copyright (C) 2014  Inversebit// w w  w  .j  a v  a  2s  .c  o 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/>.
 */
package org.inversebit.ardusonar;


import java.util.ArrayList;
import java.util.Iterator;

import android.app.AlertDialog;
import android.app.ListActivity;
import android.bluetooth.BluetoothAdapter;
import android.bluetooth.BluetoothDevice;
import android.content.DialogInterface;
import android.content.DialogInterface.OnClickListener;
import android.content.Intent;
import android.graphics.Color;
import android.os.Bundle;
import android.view.Menu;
import android.view.View;
import android.widget.ArrayAdapter;
import android.widget.ListView;
import android.widget.Toast;


public class ListDevices extends ListActivity
{  
  private BluetoothAdapter mBluetoothAdapter;
  private ArrayList<BluetoothDevice> devicesList;
  private String[] devicesNames;

  @Override
  protected void onCreate(Bundle savedInstanceState)
  {
    super.onCreate(savedInstanceState);
    getListView().setBackgroundColor(Color.WHITE);
  }  
  
  @Override
  protected void onStart()
  {
    super.onStart();
    getBTDevices();
  }

  @Override
  protected void onResume()
  {
    super.onResume();
    
    createSetShowDevicesList();        
  }

  private void createSetShowDevicesList()
  {
    extractDevicesNames();
    setListAdapter(createAdapter());
    setContentView(R.layout.activity_list_devices);
  }

  private void extractDevicesNames()
  {
    int i = 0;
    devicesNames = new String[devicesList.size()];
    
    Iterator<BluetoothDevice> btDeviceIterator = devicesList.iterator();
    while(btDeviceIterator.hasNext()){
      devicesNames[i] = btDeviceIterator.next().getName();
      i++;
    }
  }

  private ArrayAdapter<String> createAdapter()
  {    
    return new ArrayAdapter<String>(this,
                    android.R.layout.simple_list_item_1,
                    devicesNames);
  }


  private void getBTDevices()
  {
    mBluetoothAdapter = BluetoothAdapter.getDefaultAdapter();
    
    if (mBluetoothAdapter == null) 
    {
        showNoBTAlertAndFinish();
    }
    else
    {
      if (!mBluetoothAdapter.isEnabled()) 
      {
        enableBluetooth();
      }

      getPairedDevices();
    }      
  }

  private void enableBluetooth()
  {
    Intent enableBtIntent = new Intent(BluetoothAdapter.ACTION_REQUEST_ENABLE);
    startActivityForResult(enableBtIntent, Constants.REQUEST_ENABLE_BT);
  }
  
  private void getPairedDevices()
  {  
    devicesList = new ArrayList<BluetoothDevice>();
    devicesList.addAll(mBluetoothAdapter.getBondedDevices());
  }

  private void showNoBTAlertAndFinish()
  {
    AlertDialog alertDialog = new AlertDialog.Builder(ListDevices.this).create();  
    alertDialog.setCancelable(false);
        alertDialog.setTitle("Transformers");
        alertDialog.setMessage("Optimus Prime");
        alertDialog.setButton(  DialogInterface.BUTTON_NEUTRAL, 
                    getString(android.R.string.cancel), 
                    new OnClickListener() {                  
                  @Override
                  public void onClick(DialogInterface dialog, int which)
                  {    
                    finish();
                  }
                });
        alertDialog.show();
       
        
  }
  
  private void showCannotEnableBTAlert()
  {
    AlertDialog alertDialog = new AlertDialog.Builder(this).create();  
    alertDialog.setCancelable(false);
        alertDialog.setTitle(getString(R.string.app_needs_bt_title));
        alertDialog.setMessage(getString(R.string.app_needs_bt_text));
        alertDialog.setButton(  DialogInterface.BUTTON_POSITIVE, 
                    getString(R.string.app_needs_bt_yes), 
                    new OnClickListener() {                  
                  @Override
                  public void onClick(DialogInterface dialog, int which)
                  {    
                    getBTDevices();
                  }
                });
        alertDialog.setButton(  DialogInterface.BUTTON_NEGATIVE, 
                getString(R.string.app_needs_bt_no), 
                new OnClickListener() {                  
                  @Override
                  public void onClick(DialogInterface dialog, int which)
                  {  
                    finish();
                  }
                });
        alertDialog.show();
  }

  @Override
  protected void onListItemClick(ListView l, View v, int position, long id)
  {
    super.onListItemClick(l, v, position, id);
    
    getDeviceSocketAndAttempConnection(position);
  }

  private void getDeviceSocketAndAttempConnection(int position)
  {  
    Intent intent = new Intent(getBaseContext(), SocketGetter.class);
    intent.putExtra(Constants.deviceExtra, devicesList.get(position));
    startActivityForResult(intent, Constants.REQUEST_SOCKET_CONNECTION);
  }

  private boolean deviceIsConnectable()
  {
    return SocketHolder.getMySH().getBluetoothSocket() != null;
  }

  private void showNotConnectableToast()
  {
    Toast.makeText(
          getApplicationContext(), 
          getString(R.string.device_not_available), 
          Toast.LENGTH_SHORT).show();    
  }
  
  private void launchTransmissionActivity()
  {
    Intent intent = new Intent(getBaseContext(), TransmissionActivity.class);
    startActivity(intent);
  }


  @Override
  public boolean onCreateOptionsMenu(Menu menu)
  {
    // Inflate the menu; this adds items to the action bar if it is present.
    getMenuInflater().inflate(R.menu.list_devices, menu);
    return true;
  }
  
  protected void onActivityResult(int requestCode, int resultCode, Intent data) {
      switch(requestCode){    
        case Constants.REQUEST_ENABLE_BT: 
            dealWithEnableBTRequest(resultCode);
            break;
            
      case Constants.REQUEST_SOCKET_CONNECTION:        
        dealWithSocketConnectionRequest();
        break;
      }
  }

  private void dealWithSocketConnectionRequest()
  {
    if(deviceIsConnectable()){
      showConnectedToDeviceToast();
      launchTransmissionActivity();
    }
    else{
      showNotConnectableToast();
    }
  }

  private void dealWithEnableBTRequest(int resultCode)
  {
    if (resultCode != RESULT_OK) 
    {
      showCannotEnableBTAlert();
    }
    else
    {
      getPairedDevices();
    }
  }

  private void showConnectedToDeviceToast()
  {
    Toast.makeText(
        getApplicationContext(), 
        getString(R.string.connected_to_device), 
        Toast.LENGTH_SHORT).show();    
  }
  
}

Java Source Code List

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