Android Open Source - note-trainer Note Trainer Activity

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Back to project page note-trainer.

License

The source code is released under:

Apache License

Java Source Code

package org.programmerplanet.notetrainer.android;
//from   ww w .  ja  va2  s.co m
import android.app.Activity;
import android.graphics.Color;
import android.os.Bundle;
import android.view.View;
import android.view.ViewGroup;
import android.widget.Button;
import android.widget.LinearLayout;
import android.widget.TextView;

/**
 * @author <a href="jfifield@programmerplanet.org">Joseph Fifield</a>
 * 
 * Copyright (c) 2011 Joseph Fifield
 */
public class NoteTrainerActivity extends Activity {

  private static final String INSTANCE_STATE_NOTE = "note";
  private static final String INSTANCE_STATE_STATUS_TEXT = "status_text";
  private static final String INSTANCE_STATE_STATUS_COLOR = "status_color";
  private static final String INSTANCE_STATE_ATTEMPTS = "attempts";
  private static final String INSTANCE_STATE_CORRECT = "correct";

  private MusicStaffView musicStaff;
  private TextView statusTextView;
  private TextView progressTextView;
  private int attempts = 0;
  private int correct = 0;

  public void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    setContentView(R.layout.main);
    musicStaff = (MusicStaffView)findViewById(R.id.MusicStaff);
    statusTextView = (TextView)findViewById(R.id.StatusTextView);
    progressTextView = (TextView)findViewById(R.id.ProgressTextView);

    LinearLayout noteButtonBar = (LinearLayout)findViewById(R.id.NoteButtonBar);

    View.OnClickListener listener = new View.OnClickListener() {
      public void onClick(View v) {
        Button button = (Button)v;
        CharSequence text = button.getText();
        char answer = text.charAt(0);
        answered(answer);
      }
    };

    LinearLayout.LayoutParams layoutParams = new LinearLayout.LayoutParams(ViewGroup.LayoutParams.FILL_PARENT, ViewGroup.LayoutParams.WRAP_CONTENT, 1);
    for (char note = Note.FIRST_NOTE; note <= Note.LAST_NOTE; note++) {
      Button button = new Button(this);
      button.setLayoutParams(layoutParams);
      button.setText(Character.toString(note));
      button.setOnClickListener(listener);
      noteButtonBar.addView(button);
    }

    setRandomNote();
  }

  protected void onSaveInstanceState(Bundle outState) {
    super.onSaveInstanceState(outState);
    outState.putSerializable(INSTANCE_STATE_NOTE, musicStaff.getNote());
    outState.putString(INSTANCE_STATE_STATUS_TEXT, statusTextView.getText().toString());
    outState.putInt(INSTANCE_STATE_STATUS_COLOR, statusTextView.getTextColors().getDefaultColor());
    outState.putInt(INSTANCE_STATE_ATTEMPTS, attempts);
    outState.putInt(INSTANCE_STATE_CORRECT, correct);
  }

  protected void onRestoreInstanceState(Bundle savedInstanceState) {
    super.onRestoreInstanceState(savedInstanceState);
    musicStaff.setNote((Note)savedInstanceState.getSerializable(INSTANCE_STATE_NOTE));
    statusTextView.setText(savedInstanceState.getString(INSTANCE_STATE_STATUS_TEXT));
    statusTextView.setTextColor(savedInstanceState.getInt(INSTANCE_STATE_STATUS_COLOR));
    attempts = savedInstanceState.getInt(INSTANCE_STATE_ATTEMPTS);
    correct = savedInstanceState.getInt(INSTANCE_STATE_CORRECT);
    setProgressText();
  }

  private void answered(char answer) {
    attempts++;
    if (answer == musicStaff.getNote().getName()) {
      correct++;
      setStatusTextCorrect();
      setRandomNote();
    } else {
      setStatusTextIncorrect();
    }
    setProgressText();
  }

  private void setStatusTextCorrect() {
    statusTextView.setText(R.string.correct);
    statusTextView.setTextColor(Color.GREEN);
  }

  private void setStatusTextIncorrect() {
    statusTextView.setText(R.string.incorrect);
    statusTextView.setTextColor(Color.RED);
  }

  private void setProgressText() {
    progressTextView.setText(correct + "/" + attempts);
  }

  private void setRandomNote() {
    Note note = musicStaff.getNote();
    while (note.equals(musicStaff.getNote())) {
      note = Note.getRandomNote();
    }
    musicStaff.setNote(note);
  }

}

Java Source Code List

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