Android Open Source - BluetoothPulseMeter Main Activity

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From Project

Back to project page BluetoothPulseMeter.

License

The source code is released under:

GNU General Public License

Java Source Code

package se.kth.anderssonljung.bluetoothpulsemeter;
/*from   w w w . j a va 2  s . co  m*/
import java.io.File;
import java.io.FileInputStream;
import java.io.FileNotFoundException;
import java.io.IOException;
import java.io.OutputStream;
import java.net.Socket;
import java.net.UnknownHostException;
import java.util.Set;
import java.util.UUID;

import android.app.Activity;
import android.app.AlertDialog;
import android.bluetooth.BluetoothAdapter;
import android.bluetooth.BluetoothDevice;
import android.bluetooth.BluetoothSocket;
import android.content.DialogInterface;
import android.os.AsyncTask;
import android.os.Bundle;
import android.os.Handler;
import android.os.Message;
import android.util.Log;
import android.view.Menu;
import android.view.MenuItem;
import android.view.View;
import android.widget.Button;
import android.widget.TextView;
import android.widget.Toast;

/**
 * Application that displays bluetooth pulse meter data, saves it to file and
 * uploads it to server
 * 
 * @author Jonas Andersson, Fredrik Ljung
 * 
 */
public class MainActivity extends Activity {
  private static final UUID uuid = UUID
      .fromString("00001101-0000-1000-8000-00805f9b34fb");
  private BluetoothAdapter bluetoothAdapter;
  public TextView textview;
  private Button button;
  private BluetoothDevice device;
  private boolean bluetoothsuccess = false;
  UploadTask uploadTask;
  BluetoothThread bThread;

  Handler handler = new Handler() {
    @Override
    public void handleMessage(Message msg) {
      Bundle b = msg.getData();
      String pulse = b.getString("pulse");
      textview.setText(pulse);
    }
  };

  @Override
  protected void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    setContentView(R.layout.activity_main);
    Log.d("onCreate", "Application started");

    bluetoothsuccess = setupBlueTooth();
    button = (Button) findViewById(R.id.button1);
    textview = (TextView) findViewById(R.id.textView1);

    button.setText("Start");
    textview.setText("-");
  }

  private boolean setupBlueTooth() {
    bluetoothAdapter = BluetoothAdapter.getDefaultAdapter();
    if (bluetoothAdapter == null) {

      AlertDialog.Builder builder = new AlertDialog.Builder(this);
      builder.setMessage("Bluetooth not enabled")
          .setCancelable(false)
          .setPositiveButton("OK",
              new DialogInterface.OnClickListener() {
                public void onClick(DialogInterface dialog,
                    int id) {
                }
              });
      AlertDialog alert = builder.create();
      alert.show();
      return false;
    }

    Set<BluetoothDevice> devices = bluetoothAdapter.getBondedDevices();

    if (devices.isEmpty()) {
      AlertDialog.Builder builder = new AlertDialog.Builder(this);
      builder.setMessage("No paired devices available")
          .setCancelable(false)
          .setPositiveButton("OK",
              new DialogInterface.OnClickListener() {
                public void onClick(DialogInterface dialog,
                    int id) {
                }
              });
      AlertDialog alert = builder.create();
      alert.show();
      return false;
    }
    for (BluetoothDevice device : devices) {
      this.device = device;
      break;
    }
    return true;

  }

  @Override
  protected void onDestroy() {
    super.onDestroy();
    if (uploadTask != null) {
      uploadTask.cancel(true);
    }
    if (bThread != null) {
      bThread.setCancelled(true);
    }
  }

  /**
   * Starts or stops bluetooth data gathering
   * 
   * @param view
   */
  public void onButtonClick(View view) {
    Log.d("Button", "Button Clicked");

    if (!bluetoothsuccess) {
      showToast("Bluetooth is not setup");
      return;
    }

    if (button.getText().toString().equalsIgnoreCase("START")) {
      button.setText("Stop");
      Log.d("Button", "Button said start -> Now starting");
      // Start measuring
      try {
        BluetoothSocket socket = device
            .createInsecureRfcommSocketToServiceRecord(uuid);
        bThread = new BluetoothThread(socket, textview,
            getExternalFilesDir(null), handler);
        new Thread(bThread).start();
      } catch (IOException e) {
        // TODO Auto-generated catch block
        e.printStackTrace();
      }
    } else {
      File mostRecentFile = bThread.getFile();
      bThread.setRunning(false);
      button.setText("Start");
      UploadTask task = new UploadTask(mostRecentFile);
      task.execute();
      Log.d("Button", "Button did not say start -> Now stopping");
    }
  }

  @Override
  public boolean onCreateOptionsMenu(Menu menu) {
    // Inflate the menu; this adds items to the action bar if it is present.
    getMenuInflater().inflate(R.menu.main, menu);
    return true;
  }

  @Override
  public boolean onOptionsItemSelected(MenuItem item) {
    // Handle action bar item clicks here. The action bar will
    // automatically handle clicks on the Home/Up button, so long
    // as you specify a parent activity in AndroidManifest.xml.
    int id = item.getItemId();
    if (id == R.id.action_settings) {
      return true;
    }
    return super.onOptionsItemSelected(item);
  }

  /**
   * Uploads file to server
   * 
   * @author Fredrik
   * 
   */
  private class UploadTask extends AsyncTask<Void, Void, Void> {
    File file;

    public UploadTask(File file) {
      this.file = file;
    }

    @Override
    protected Void doInBackground(Void... params) {
      FileInputStream fis = null;
      OutputStream os = null;
      Socket socket = null;
      Log.d("UploadTask", "Reached doInBackground");
      try {
        fis = new FileInputStream(file);
        Log.d("UploadTask", "FileInputstream opened");
        socket = new Socket("193.10.37.92", 1337);
        Log.d("UploadTask", "Socket defined");
        byte[] buffer = new byte[1024];

        int bytesRead;
        os = socket.getOutputStream();
        Log.d("UploadTask", "outputstream opened");
        int loopcounter = 0;
        while ((bytesRead = fis.read(buffer)) != -1) {
          loopcounter++;
          if (isCancelled()) {
            break;
          }
          os.write(buffer);
        }
        Log.d("UploadTask", "Finished reading after # of loops: "
            + loopcounter);

      } catch (FileNotFoundException e) {
        // TODO Auto-generated catch block
        e.printStackTrace();
      } catch (UnknownHostException e) {
        // TODO Auto-generated catch block
        e.printStackTrace();
      } catch (IOException e) {
        // TODO Auto-generated catch block
        e.printStackTrace();
      } finally {
        if (fis != null) {
          try {
            fis.close();
          } catch (IOException e) {
            // TODO Auto-generated catch block
            e.printStackTrace();
          }
          if (os != null) {
            try {
              os.close();
            } catch (IOException e) {
              // TODO Auto-generated catch block
              e.printStackTrace();
            }
          }
          if (socket != null) {
            try {
              socket.close();
            } catch (IOException e) {
              // TODO Auto-generated catch block
              e.printStackTrace();
            }
          }

        }
      }

      Log.d("UploadTask", "Finished do in background");
      return null;
    }

    @Override
    protected void onPostExecute(Void result) {
      showToast("Upload completed");
      Log.d("UploadTask", "Reached onPostExecute");
    }

  }

  /**
   * Shows a short toast message
   * 
   * @param message
   */
  private void showToast(String message) {
    Toast.makeText(getApplicationContext(), message, Toast.LENGTH_SHORT)
        .show();

  }

}

Java Source Code List

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