Android Open Source - Handalfabet Level Chooser Activity

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License

The source code is released under:
GNU General Public License
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Java Source Code

package com.example.android;
//from w w w  .  j av  a2s. c  o  m
import android.app.Activity;
import android.content.Intent;
import android.graphics.Bitmap;
import android.media.MediaPlayer;
import android.os.Build;
import android.os.Bundle;
import android.support.v4.app.NavUtils;
import android.view.KeyEvent;
import android.view.Menu;
import android.view.MenuItem;
import android.view.View;
import android.widget.Button;
import android.widget.ImageView;
import android.widget.RadioGroup;
import android.widget.TextView;

/**
 *    Copyright? 2012, Grupp02
 * 
 *     This file is part of Handalfabetet.
 *
 *   Handalfabetet 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.
 *
 *   Handalfabetet 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 Handalfabetet.  If not, see <http://www.gnu.org/licenses/>.
 */

/**
 * The LevelChooserActivity class.
 * 
 * @author : Grupp02
 * @version : 2012-10-21, v1.0
 * 
 */
public class LevelChooserActivity extends Activity {

    // Audio Focus helper
    private AudioFocusHelper focusHelper;

    // DifficultyLevel
    private int difficulty = 1;
    private int numLetters;

    private Button firstLevelButton;
    private Button secondLevelButton;
    private Button thirdLevelButton;
    private RadioGroup radialDifficulty;

    private TextView userName;
    private TextView userStatus;
    private Bitmap img;
    private ImageView userImg;

    private final int zero = 0;
    private final int oneLetter = 1;
    private final int twoLetters = 2;
    private final int threeLetters = 3;
    private final int difficultyOne = 1;
    private final int difficultyTwo = 2;
    private final int difficultyThree = 3;

    @Override
    public void onCreate(Bundle savedInstanceState) {
  super.onCreate(savedInstanceState);
  setContentView(R.layout.activity_level_chooser);

  // Make sure we're running on Honeycomb or higher to use ActionBar APIs
  if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.HONEYCOMB) {
      // getActionBar().setDisplayHomeAsUpEnabled( true );
  }

  if (android.os.Build.VERSION.SDK_INT >= Build.VERSION_CODES.FROYO) {
      focusHelper = new AudioFocusHelper(this);
  } else {
      focusHelper = null;
  }

  // User Image
  userImg = (ImageView) findViewById(R.id.userpic);
  img = (Bitmap) (getIntent().getExtras().getParcelable("userImg"));
  userImg.setImageBitmap(img);

  userStatus = (TextView) findViewById(R.id.textView1);
  // Since a user must be logged in at this point, this status does not
  // need
  // retrieved
  userStatus.setText(R.string.logged_in);
  // Displays the username
  userName = (TextView) findViewById(R.id.textView2);
  userName.setText(getIntent().getStringExtra("Name"));

  firstLevelButton = (Button) findViewById(R.id.firstLevelButton);
  secondLevelButton = (Button) findViewById(R.id.secondLevelButton);
  thirdLevelButton = (Button) findViewById(R.id.thirdLevelButton);
  radialDifficulty = (RadioGroup) findViewById(R.id.radialDifficulty);

  firstLevelButton.setOnClickListener(new View.OnClickListener() {
      public void onClick(View v) {
    playButton();
    numLetters = oneLetter;
    chooseDifficulty(v);
      }
  });

  secondLevelButton.setOnClickListener(new View.OnClickListener() {
      public void onClick(View v) {
    playButton();
    numLetters = twoLetters;
    chooseDifficulty(v);
      }
  });

  thirdLevelButton.setOnClickListener(new View.OnClickListener() {
      public void onClick(View v) {
    playButton();
    numLetters = threeLetters;
    chooseDifficulty(v);
      }
  });
    }

    @Override
    /**
     * onResume is overridden in order to utterly abandon sound focus if
     * sound has been turned off, or resume sound if on.
     * 
     */
    public void onResume() {
  super.onResume();

  if (SoundPlayer.getSoundEnabled() == false) {
      if (focusHelper != null) {
    focusHelper.abandonFocus();
      }
      SoundPlayer.stop();
  } else {
      SoundPlayer.resume();
  }
    }

    @Override
    public void onPause() {
  super.onPause(); // Always call the superclass method first

  // Pause sound when paused
  if (SoundPlayer.getSoundEnabled()) {
      SoundPlayer.pause();
  }
    }

    public void onRadioButtonClicked(View v) {
  int selectedId = radialDifficulty.getCheckedRadioButtonId();

  if (selectedId == R.id.difficulty1Radial) {
      difficulty = difficultyOne;
  }
  if (selectedId == R.id.difficulty2Radial) {
      difficulty = difficultyTwo;
  }
  if (selectedId == R.id.difficulty3Radial) {
      difficulty = difficultyThree;
  }
    }

    /**
     * The getAudioFocus method attempts to gain focus for playing audio. If
     * full access can't be gained, transitive access at a quiet volume is
     * attempted. If that can't be granted, false is returned.
     * 
     * @return : true if focus in some form is granted, otherwise false
     */
    private boolean getAudioFocus() {

  if (focusHelper != null) {
      if (!focusHelper.requestFocus()) {
    if (!focusHelper.requestQuietFocus()) {
        return false;
    } else {
        return true;
    }
      } else {
    return true;
      }
  }

  return false;
    }

    /**
     * playButton plays the button sound
     * 
     * If there is an AudioFocusHelper (api >= 8) use it, otherwise default to
     * SoundPlayer
     */
    public void playButton() {
  if (SoundPlayer.getSoundEnabled()) {
      if (focusHelper != null) {
    if (getAudioFocus()) {
        focusHelper.playButton();
    }
      } else {
    SoundPlayer.playButton(this);
      }
  }
    }

    @Override
    public boolean onCreateOptionsMenu(Menu menu) {
  getMenuInflater().inflate(R.menu.activity_level_chooser, menu);
  return true;
    }

    @Override
    public boolean onOptionsItemSelected(MenuItem item) {
  switch (item.getItemId()) {
  case android.R.id.home:
      NavUtils.navigateUpFromSameTask(this);
      return true;
  }
  return super.onOptionsItemSelected(item);
    }

    @Override
    public void onSaveInstanceState(Bundle savedInstanceState) {
  // Save name, user status, and user picture
  savedInstanceState.putString("Name", userName.getText().toString());
  savedInstanceState.putString("status", userStatus.getText().toString());
  savedInstanceState.putParcelable("picture", img);
  savedInstanceState.putInt("difficulty", difficulty);
  savedInstanceState.putInt("letters", numLetters);

  // Always call the superclass so it can save the view hierarchy state
  super.onSaveInstanceState(savedInstanceState);
    }

    @Override
    public void onRestoreInstanceState(Bundle savedInstanceState) {
  // Always call the superclass so it can restore the view hierarchy
  super.onRestoreInstanceState(savedInstanceState);

  // Restore name, user status, and user picture
  userName.setText(savedInstanceState.getString("Name"));
  userStatus.setText(savedInstanceState.getString("status"));
  img = savedInstanceState.getParcelable("picture");
  userImg.setImageBitmap(img);
  difficulty = savedInstanceState.getInt("difficulty");
  numLetters = savedInstanceState.getInt("letters ");
    }

    /** Called when the user clicks a difficulty button */
    public void chooseDifficulty(View v) {
  Intent intent = new Intent("android.intent.action.GAME");
  intent.putExtra("Difficulty", difficulty);
  intent.putExtra("Letters", numLetters);
  intent.putExtra("Name", userName.getText().toString());
  intent.putExtra("userImg", img);
  startActivity(intent);

  // kills current activity
  finish();
    }

    /**
     * onKeyDown overrides onKeyDown and allows code to be executed when the
     * back button is pushed in the simulator / on the mobile phone Since
     * pushing "back" won't necessarily call the destroy method as far as I
     * understand it.
     * 
     * @param keyCode
     *            : code of the key pressed
     * @param event
     *            : the event for the key pressed
     */
    @Override
    public boolean onKeyDown(int keyCode, KeyEvent event) {
  if (keyCode == KeyEvent.KEYCODE_BACK && event.getRepeatCount() == zero) {

    //This code cannot be in onStop in LevelChooserActivity because
    //it also kills the ticking noise as Game begins
      //cancel any noises and abandon focus
      SoundPlayer.stop();
    if (focusHelper != null) {
        focusHelper.abandonFocus();
    }
      
      // continue backwards (kills current activity calling onDestroy)
      finish();

      return true;
  }

  return super.onKeyDown(keyCode, event);
    }
}
Java Source Code List
