Android Open Source - a-sound-wave Main

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From Project

Back to project page a-sound-wave.

License

The source code is released under:

GNU Lesser General Public License

Java Source Code

package com.bhatworks.sound.wave;
/*w ww  .j a  v  a 2  s.co m*/
import static java.lang.Integer.parseInt;

import java.util.Timer;
import java.util.TimerTask;

import android.app.Activity;
import android.content.SharedPreferences;
import android.content.SharedPreferences.Editor;
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.View;
import android.widget.EditText;
import android.widget.ToggleButton;

import com.bhatworks.sound.wave.SoundPlayer.Properties;

public class Main extends Activity {
  
  // for logging
  public static final String CLASS = Main.class.getSimpleName();
  public static final String PREFERENCE_FILE = "com.bhatworks.sound.wave.frequency";
  
  private SoundPlayer player;
  private ToggleButton btnMedia;
  private EditText txtFrequency;
  
  private Timer timer;
  private int frequency;
  
  @Override
  public void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    setContentView(R.layout.activity_main);
    
    btnMedia = (ToggleButton) findViewById(R.id.btn_media);
    txtFrequency = (EditText) findViewById(R.id.txt_freq);
    btnMedia.setText(R.string.btn_play);
  }
  
  @Override
  public boolean onCreateOptionsMenu(Menu menu) {
    getMenuInflater().inflate(R.menu.activity_main, menu);
    return true;
  }
  
  @Override
  protected void onStart() {
    super.onStart();
    Log.i(CLASS, "loading preferences");
    SharedPreferences preferences = getSharedPreferences(PREFERENCE_FILE, MODE_PRIVATE);
    frequency = preferences.getInt("frequency", 1000);
    txtFrequency.setText(String.valueOf(frequency));
    Log.d(CLASS, "frequency:" + frequency);
  }
  
  @Override
  protected void onStop() {
    super.onStop();
    try {
      frequency = parseInt(txtFrequency.getText().toString());
    } catch (NumberFormatException e) {
    }
    Log.i(CLASS, "frequency:" + frequency);
    Editor editor = getSharedPreferences(PREFERENCE_FILE, MODE_PRIVATE).edit();
    editor.putInt("frequency", frequency);
    editor.commit();
    Log.i(CLASS, "saved preferences");
  }
  
  public void onMediaClick(View v) {
    if (player == null) {
      try {
        frequency = parseInt(txtFrequency.getText().toString());
        player = new SoundPlayer();
        player.execute(new Properties[] { new SoundPlayer.Properties(frequency, 0, 200) });
        Log.i(CLASS, "Player started");
        btnMedia.setText(R.string.btn_stop);
        timer = new Timer();
        timer.schedule(new TimerTask() {
          
          @Override
          public void run() {
            if (!player.getStatus().equals(AsyncTask.Status.FINISHED)) {
              player.cancel(true);
            }
            Log.i(CLASS, "Timer expired, stopped player");
          }
        }, 5000);
        player.setHandler(new Handler(new Handler.Callback() {
          
          @Override
          public boolean handleMessage(Message msg) {
            if (msg == SoundPlayer.STOP_MESSAGE) {
              btnMedia.setText(R.string.btn_play);
            }
            return true;
          }
        }));
      } catch (NumberFormatException e) {
        Log.e(CLASS, "problem caused by user", e);
      }
    } else {
      player.cancel(true);
      Log.i(CLASS, "Player stopped");
      timer.cancel();
      timer.purge();
      player = null;
      btnMedia.setText(R.string.btn_play);
    }
  }
}

Java Source Code List

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