Android Open Source - Android-Data-Logger Main Activity

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From Project

Back to project page Android-Data-Logger.

License

The source code is released under:

Apache License

Java Source Code

package com.abhinav.androiddatalogger;
//from w w  w.  j a  va 2s  .  co  m

import java.io.BufferedWriter;
import java.io.File;
import java.io.FileWriter;
import java.io.IOException;
import java.util.HashMap;
import java.util.Map;

import android.app.Activity;
import android.content.Context;
import android.hardware.Sensor;
import android.hardware.SensorEvent;
import android.hardware.SensorEventListener;
import android.hardware.SensorManager;
import android.location.Location;
import android.location.LocationListener;
import android.location.LocationManager;
import android.os.Bundle;
import android.os.Environment;
import android.view.Menu;
import android.view.View;
import android.view.View.OnClickListener;
import android.widget.TextView;
import android.widget.ToggleButton;

public class MainActivity extends Activity {

  private SensorManager sensorManager;
  private BufferedWriter file;
  private LocationManager locationManager;
  private Map<Integer, String> sensorTypes = new HashMap<Integer, String>();
  private Map<Integer, Sensor> sensors = new HashMap<Integer, Sensor>();
  private TextView filenameDisplay;
  private TextView logDisplay;

  @Override
  protected void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    setContentView(R.layout.activity_main);

    // Get sensors to be captured
    sensorTypes.put(Sensor.TYPE_ACCELEROMETER, "ACCEL");
    sensorTypes.put(Sensor.TYPE_GYROSCOPE, "GYRO");
    sensorTypes.put(Sensor.TYPE_LINEAR_ACCELERATION, "LINEAR");
    sensorTypes.put(Sensor.TYPE_MAGNETIC_FIELD, "MAG");
    sensorTypes.put(Sensor.TYPE_GRAVITY, "GRAV");
    sensorTypes.put(Sensor.TYPE_ROTATION_VECTOR, "ROTATION");

    sensorManager = (SensorManager) getSystemService(Context.SENSOR_SERVICE);
    for (Integer type : sensorTypes.keySet()) {
      sensors.put(type, sensorManager.getDefaultSensor(type));
    }

    locationManager = (LocationManager) this
        .getSystemService(Context.LOCATION_SERVICE);

    // Register click listeners for buttons
    findViewById(R.id.toggle).setOnClickListener(clickListener);
    findViewById(R.id.btnEnter).setOnClickListener(clickListener);
    findViewById(R.id.btnExit).setOnClickListener(clickListener);

    filenameDisplay = (TextView) findViewById(R.id.filename);
    logDisplay = (TextView) findViewById(R.id.log);
  }

  @Override
  protected void onDestroy() {
    super.onDestroy();
    stopRecording();
  }

  private void startRecording() {
    // Prepare data storage
    File directory = Environment
        .getExternalStoragePublicDirectory(Environment.DIRECTORY_DOWNLOADS);
    String name = "AllData_" + System.currentTimeMillis() + ".csv";
    File filename = new File(directory, name);
    try {
      file = new BufferedWriter(new FileWriter(filename));
    } catch (IOException e) {
      e.printStackTrace();
    }
    filenameDisplay.setText(name);

    // Register sensor listeners
    for (Sensor sensor : sensors.values()) {
      sensorManager.registerListener(sensorListener, sensor,
          SensorManager.SENSOR_DELAY_NORMAL);
    }
    locationManager.requestLocationUpdates(LocationManager.GPS_PROVIDER, 0,
        0, locationListener);
  }

  private void stopRecording() {
    sensorManager.unregisterListener(sensorListener);
    locationManager.removeUpdates(locationListener);
    filenameDisplay.setText("");
    try {
      file.close();
    } catch (IOException e) {
      // TODO Auto-generated catch block
      e.printStackTrace();
    }
  }

  private OnClickListener clickListener = new OnClickListener() {

    @Override
    public void onClick(View v) {
      switch (v.getId()) {
      case R.id.toggle:
        if (((ToggleButton) v).isChecked()) {
          startRecording();
        } else {
          stopRecording();
        }
        break;
      case R.id.btnEnter:
        write("ENTER");
        break;
      case R.id.btnExit:
        write("EXIT");
        break;
      }
    }

  };

  private SensorEventListener sensorListener = new SensorEventListener() {

    @Override
    public void onAccuracyChanged(Sensor sensor, int accuracy) {
    }

    @Override
    public void onSensorChanged(SensorEvent event) {
      write(sensorTypes.get(event.sensor.getType()), event.values);
    }

  };

  private LocationListener locationListener = new LocationListener() {

    @Override
    public void onLocationChanged(Location location) {
      write("GPS",
          new double[] { location.getLatitude(),
              location.getLongitude() });
    }

    @Override
    public void onProviderDisabled(String provider) {
    }

    @Override
    public void onProviderEnabled(String provider) {
    }

    @Override
    public void onStatusChanged(String provider, int status, Bundle extras) {
    }

  };

  @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;
  }

  private void write(String tag, String[] values) {
    if (file == null) {
      return;
    }

    String line = "";
    if (values != null) {
      for (String value : values) {
        line += "," + value;
      }
    }
    line = Long.toString(System.currentTimeMillis()) + "," + tag + line
        + "\n";

    try {
      file.write(line);
    } catch (IOException e) {
      // TODO Auto-generated catch block
      e.printStackTrace();
    }

    logDisplay.setText(line);
  }

  private void write(String tag, float[] values) {
    String[] array = new String[values.length];
    for (int i = 0; i < values.length; i++) {
      array[i] = Float.toString(values[i]);
    }
    write(tag, array);
  }

  private void write(String tag, double[] values) {
    String[] array = new String[values.length];
    for (int i = 0; i < values.length; i++) {
      array[i] = Double.toString(values[i]);
    }
    write(tag, array);
  }

  private void write(String tag) {
    write(tag, (String[]) null);
  }

}

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