Android Open Source - WordZap Start Screen

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License

The source code is released under:
Copyright (c) 2010 Kowshik Prakasam Permission is hereby granted, free of charge, to any person obtaining a copy of this software and associated documentation files (the "Software"), to deal ...
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Java Source Code

/**
 * /*  ww w .  j  a va2s  .  c o  m*/
 * The MIT License : http://www.opensource.org/licenses/mit-license.php

 * Copyright (c) 2010 Kowshik Prakasam

 * Permission is hereby granted, free of charge, to any person obtaining a copy
 * of this software and associated documentation files (the "Software"), to deal
 * in the Software without restriction, including without limitation the rights
 * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
 * copies of the Software, and to permit persons to whom the Software is
 * furnished to do so, subject to the following conditions:

 * The above copyright notice and this permission notice shall be included in
 * all copies or substantial portions of the Software.

 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
 * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
 * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
 * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
 * THE SOFTWARE.
 *
 */

package com.android.wordzap;

import android.app.Activity;
import android.app.AlertDialog;
import android.app.Dialog;
import android.content.DialogInterface;
import android.content.Intent;
import android.os.Bundle;
import android.view.View;
import android.view.View.OnClickListener;
import android.widget.TextView;

/* 
 * Activity class for the start screen of WordZap
 * Contains a simple banner with the text WordZap, which when clicked takes the user to activity : GameScreen
 * The user can also set the difficulty level using "+" and "-" buttons
 * 
 */

public class StartScreen extends Activity implements OnClickListener {

  /** Called when the activity is first created. */
  private TextView txtPlus;
  private TextView txtMinus;
  private TextView txtLevel;
  private TextView txtTitle;
  private TextView txtHelp;
  private TextView txtCredits;

  private String helpText;
  private String creditsText;

  private static final int HELP_DIALOG = 1;
  private static final int CREDITS_DIALOG = 2;
  private static final int GAMEOVER_DIALOG = 3;
  private static final int START_GAME = 0;

  @Override
  public void onCreate(Bundle savedInstanceState) {

    super.onCreate(savedInstanceState);
    this.setRequestedOrientation(WordZapConstants.DEFAULT_ORIENTATION);
    setContentView(R.layout.start_screen);

    // Retrieving on-screen text views
    this.txtTitle = (TextView) findViewById(R.id.txtViewTitle);
    this.txtPlus = (TextView) findViewById(R.id.txtViewPlus);
    this.txtMinus = (TextView) findViewById(R.id.txtViewMinus);
    this.txtLevel = (TextView) findViewById(R.id.txtViewLevel);
    this.txtHelp = (TextView) findViewById(R.id.txtViewHelp);
    this.txtCredits = (TextView) findViewById(R.id.txtViewCredits);

    // Adding listeners
    txtTitle.setOnClickListener(this);
    txtPlus.setOnClickListener(this);
    txtMinus.setOnClickListener(this);
    txtHelp.setOnClickListener(this);
    txtCredits.setOnClickListener(this);

    // Retrieving help text
    this.helpText = this.getResources().getString(R.string.help_text);
    this.creditsText = this.getResources().getString(R.string.credits);

  }

  public void onClick(View v) {
    TextView clickedTxtView = (TextView) v;
    if (clickedTxtView.equals(this.txtTitle)) {
      int chosenLevel = Integer.parseInt(this.txtLevel.getText()
          .toString());
      this.startGame(chosenLevel);
    }
    // User has selected the previous level by clicking on the TextView with
    // the text : "+"
    if (clickedTxtView.equals(this.txtPlus)) {
      int currLevel = Integer
          .parseInt(this.txtLevel.getText().toString());
      int nextLevel;
      if (currLevel < LevelGenerator.MAX_LEVEL) {
        nextLevel = currLevel + 1;
      } else {
        nextLevel = LevelGenerator.MIN_LEVEL;
      }
      txtLevel.setText("" + nextLevel);
    }
    // User has selected the previous level by clicking on the TextView with
    // the text : "-"
    if (clickedTxtView.equals(this.txtMinus)) {
      int currLevel = Integer
          .parseInt(this.txtLevel.getText().toString());
      int nextLevel;
      if (currLevel > LevelGenerator.MIN_LEVEL) {
        nextLevel = currLevel - 1;
      } else {
        nextLevel = LevelGenerator.MAX_LEVEL;
      }

      txtLevel.setText("" + nextLevel);
    }
    // User wants help on how to use WordZap
    if (clickedTxtView.equals(this.txtHelp)) {
      this.showDialog(StartScreen.HELP_DIALOG);
    }
    // User wants see credits
    if (clickedTxtView.equals(this.txtCredits)) {
      this.showDialog(StartScreen.CREDITS_DIALOG);
    }
  }

  @Override
  protected Dialog onCreateDialog(int id) {
    Dialog dialog = null;
    AlertDialog.Builder builder = null;
    switch (id) {
    case StartScreen.HELP_DIALOG:
      builder = new AlertDialog.Builder(this);
      builder.setMessage(this.helpText)
          .setCancelable(false)
          .setPositiveButton("Okay",
              new DialogInterface.OnClickListener() {
                public void onClick(DialogInterface dialog,
                    int id) {
                  dialog.cancel();
                }
              });
      dialog = builder.create();
      break;
    case StartScreen.CREDITS_DIALOG:
      builder = new AlertDialog.Builder(this);
      builder.setMessage(this.creditsText)
          .setCancelable(false)
          .setPositiveButton("Okay",
              new DialogInterface.OnClickListener() {
                public void onClick(DialogInterface dialog,
                    int id) {
                  dialog.cancel();
                }
              });
      dialog = builder.create();
      break;
    case StartScreen.GAMEOVER_DIALOG:
      builder = new AlertDialog.Builder(this);
      builder.setMessage(
          "Congratulations ! You have completed all the levels !")
          .setCancelable(false)
          .setPositiveButton("Okay",
              new DialogInterface.OnClickListener() {
                public void onClick(DialogInterface dialog,
                    int id) {
                  dialog.cancel();
                }
              });
      dialog = builder.create();
      break;
    }
    return dialog;
  }

  /*
   * (non-Javadoc)
   * 
   * @see android.app.Activity#onActivityResult(int, int,
   * android.content.Intent)
   * 
   * Gets the next level to be started, and starts it using startGame(...)
   * method
   */
  @Override
  protected void onActivityResult(int requestCode, int resultCode, Intent data) {
    if (requestCode == StartScreen.START_GAME
        && resultCode == Activity.RESULT_OK) {
      int nextLevel = data.getIntExtra(
          WordZapConstants.NEXT_LEVEL_PARAM_KEYNAME,
          WordZapConstants.START_LEVEL);
       if(nextLevel < LevelGenerator.MIN_LEVEL) {
         this.startGame(LevelGenerator.MIN_LEVEL);
       }
       else if (nextLevel <= LevelGenerator.MAX_LEVEL) {
        this.startGame(nextLevel);
      }else{
        this.showDialog(StartScreen.GAMEOVER_DIALOG);
      }
    }
  }

  /*
   * Starts the GameScreen activity for any particualar level
   */

  private void startGame(int level) {
    Intent i = new Intent(this, GameScreen.class);

    /*
     * Pass this parameter to GameScreen activity for loading the initial
     * level
     */
    i.putExtra(WordZapConstants.DIFFICULTY_PARAM_KEYNAME, level);
    startActivityForResult(i, StartScreen.START_GAME);
  }
}
Java Source Code List
