blitzmidlet.java

一个关于沉船的J2ME小游戏

/* This file was created by Nokia Developer's Suite for J2ME(TM) */

import javax.microedition.lcdui.*;
import javax.microedition.midlet.*;
import java.io.DataOutputStream;
import java.io.DataInputStream;
import java.io.ByteArrayOutputStream;
import java.io.ByteArrayInputStream;

public class BlitzMIDlet extends MIDlet
{
	private final Dictionary dictionary;
	private final MainMenu mainMenu;
	private final GameEffects gameEffects;

	private GameManager gameManager = null;
	private SettingsScreen settingsScreen = null;

	private int	hiScore = 0;
	private int hiLevel = 1;


	public BlitzMIDlet()
	{
		boolean bCont;
		ByteArrayInputStream gameBais;
		int iDummy;

        	dictionary =
            	new Dictionary(System.getProperty("microedition.locale"),
                           		System.getProperty("microedition.encoding"));

        	gameEffects = makeGameEffects();
		bCont = Settings.getContinue();
		try
		{
			gameBais	= Settings.getArrayValue(Settings.GM_MAIN_DATA);
			DataInputStream inputStream = new DataInputStream(gameBais);
			hiLevel	= inputStream.readInt();
			hiScore	= inputStream.readInt();
		}
		catch (Exception e)
		{
			throw new IllegalArgumentException("Error in mainMenuNewGame:try setGameData(2)");
		}

        	mainMenu = new MainMenu(this, dictionary, gameEffects, bCont);
		
	}


	protected void startApp(  ) throws MIDletStateChangeException
	{
	        Displayable current = Display.getDisplay(this).getCurrent();

	        if (current == null)
        	{
	            // Use a splash screen, the first time we are called.
			// The main menu screen will be shown after the splash.
			// First show the company splash screen
	            SplashScreen splashScreen = new SplashScreen(this, mainMenu);
	            Display.getDisplay(this).setCurrent(splashScreen);
        	    	splashScreen.start(); // disappear after a fixed time
	        }
        	else
	        {
        	  	Display.getDisplay(this).setCurrent(current);
                	if ((gameManager != null) && (current == gameManager.getCanvas()))
	          	{
        	    		gameManager.resume();
	          	}
        	}
	}

	protected void pauseApp(  )
	{
	}

	protected void destroyApp( boolean p1 ) throws MIDletStateChangeException
	{
		storeGame();
	}

	// SplashScreen callback
	void splashScreenDone(Displayable next)
	{
      	Display.getDisplay(this).setCurrent(next);
	}

	//**********************//
	// GameManager callback //
	//**********************//
	void gameManagerMainMenu(boolean isGameOver, int currentHiScore)
    	{
		ByteArrayOutputStream gameBaos = new ByteArrayOutputStream();

        	// If the game is over, remove the
        	// 'Continue' command from the MainMenu.
        	if (isGameOver)
        	{
			Settings.setContinue(false);
            	mainMenu.deleteContinue();
			try
			{
				gameBaos = gameManager.getGameData();
				Settings.setValue(Settings.GM_MAIN_DATA, gameBaos);
			}
			catch(Exception e)
			{
				// We can not do anything to recover from this error,
				// let the game proceed without using saved settings.
				throw new IllegalArgumentException("Error in gameManagerMainMenu:try setValue (1)");
			}
			hiScore = currentHiScore;
        	}
        	else
        	{
			Settings.setContinue(true);
            	// highlight 'Continue' in the main menu
            	mainMenu.selectContinue();
        	}

        	Display.getDisplay(this).setCurrent(mainMenu);
    	}


	//********************//
    	// MainMenu callbacks //
	//********************//
	void mainMenuContinue()
    	{
		if (gameManager != null)
		    	Display.getDisplay(this).setCurrent(gameManager.getCanvas());
		else
		{
			mainMenuNewGame(true);
		}
    	}


	void mainMenuNewGame(boolean getData)
    	{
        	// gameManager uses the canvas for repaints,
        	// determining canvas width, height, etc.

		// Create a new game manager if one does not exist
		if (gameManager == null)
		{
	        	Canvas closeableCanvas = makeCloseableCanvas();
     		  	gameManager = new GameManager(this, dictionary,
           			                          gameEffects, closeableCanvas);

	        	// The canvas delegates drawing of the game and handling of
     		  	// keyPressed, keyReleased or 'closePressed' events to gameManager.
     			((SettableDelegate)closeableCanvas).setDelegate(gameManager);
		}
		else gameManager.init();

		// If a saved game has been continued hen we need to upload the stored data
		if (getData)
		{
			try
			{
				ByteArrayInputStream gameBais  = Settings.getArrayValue(Settings.GM_MAIN_DATA);
				ByteArrayInputStream planeBais = Settings.getArrayValue(Settings.GM_PLANE_DATA);
				ByteArrayInputStream bombBais  = Settings.getArrayValue(Settings.GM_BOMB_DATA);
				ByteArrayInputStream buildingBais = Settings.getArrayValue(Settings.GM_BUILD_DATA);
				gameManager.setGameData(gameBais);
				gameManager.setPlaneData(planeBais);
				gameManager.setBombData(bombBais);
				gameManager.setBuildingData(buildingBais);
			}
			catch (Exception e)
			{
				throw new IllegalArgumentException("Error in mainMenuNewGame:try setGameData(1)");
			}
		}
		else
		{
			// Just set the HiScore & HiLevel
			try
			{
				ByteArrayInputStream gameBais  = Settings.getArrayValue(Settings.GM_MAIN_DATA);
				gameManager.setGameHi(gameBais);
			}
			catch (Exception e)
			{
				throw new IllegalArgumentException("Error in mainMenuNewGame:try setGameData(2)");
			}
		}
        	gameManager.start(getData);

     	  	// Set the display to be the game manager's canvas.
	    	Display.getDisplay(this).setCurrent(gameManager.getCanvas());

        	// After the game manager's canvas is displayed and
     	  	// the game is running, the 'Continue' option will be
     		// needed from the main menu.
     		mainMenu.addContinue();
    	}


    	void mainMenuSettings()
    	{
        if (settingsScreen == null)
        {
            settingsScreen = new SettingsScreen(this, dictionary, mainMenu);
        }
        Display.getDisplay(this).setCurrent(settingsScreen);
    	}


    	void mainMenuInstructions()
    	{
        String title = dictionary.getString(Dictionary.LABEL_INSTRUCTIONS);
        String back  = dictionary.getString(Dictionary.LABEL_BACK);
        String text = dictionary.getString(Dictionary.TEXT_INSTRUCTIONS);
        TextScreen screen = new TextScreen(this, title, text, back);
        Display.getDisplay(this).setCurrent(screen);
    	}


    	void mainMenuHiScore()
    	{
	  StringBuffer buff = new StringBuffer("");
	  buff.append(hiScore);
        String score	= new String(buff);
        String title	= dictionary.getString(Dictionary.LABEL_HISCORE);
	  String back	= dictionary.getString(Dictionary.LABEL_BACK);
        TextScreen aboutScreen = new TextScreen(this, title, score, back);
        Display.getDisplay(this).setCurrent(aboutScreen);
    	}


    	void mainMenuExit()
    	{
        	// destroyApp(false);
		storeGame();
        	notifyDestroyed();
    	}

    // SettingEditor callbacks

    void settingEditorSave(String name, boolean isOn)
    {
        // update game setting and settings screen
        if (name.equals(dictionary.getString(Dictionary.LABEL_VIBRATION)))
        {
            Settings.setUseVibration(isOn);
            settingsScreen.setUseVibration(isOn);
        }
        else if (name.equals(dictionary.getString(Dictionary.LABEL_SOUND)))
        {
            Settings.setUseSound(isOn);
            settingsScreen.setUseSound(isOn);
        }

        Alert confirm = new Alert(null,
            (name + " " + settingsScreen.onOffString(isOn)),
            null, AlertType.INFO); // no title
        confirm.setTimeout(4000); // show Alert for 4 seconds

        Display.getDisplay(this).setCurrent(confirm, settingsScreen);
    }


    void settingEditorBack()
    {
        Display.getDisplay(this).setCurrent(settingsScreen);
    }


    // SettingsScreen callbacks

    void settingsScreenBack(Displayable last)
    {
        settingsScreen = null; // It can be garbage collected now.

        if ((gameManager != null) && (last == gameManager.getCanvas()))
        {
            gameManager.resume();
        }
        Display.getDisplay(this).setCurrent(last);
    }


    void settingsScreenEdit(String name, boolean isOn)
    {
        Display.getDisplay(this).setCurrent(
            new SettingEditor(this, dictionary, name, isOn));
    }


    	// TextScreen callbacks (i.e. About + Instructions)
    	void textScreenClosed()
    	{
        	Display.getDisplay(this).setCurrent(mainMenu);
    	}

	// Factory-like methods
    	//
    	// The Nokia vendor-specific APIs FullCanvas, Sound, and DeviceControl
    	// are used if available. If not, use an alternative based on
    	// the capabilities of standard MIDP instead.
    	private GameEffects makeGameEffects()
    	{
        	try
        	{
            	Class.forName("com.nokia.mid.sound.Sound");
            	Class.forName("com.nokia.mid.ui.DeviceControl");
			Class.forName("com.nokia.mid.ui.DirectUtils");

            	// If no exception was thrown, use the vendor-specific APIs.
            	Class clas = Class.forName("NokiaGameEffects");
            	return (GameEffects) clas.newInstance();
        	}
        	catch (Exception e)
        	{
        	    // The vendor-specific APIs are not available,
            	// so use the 'stub' GameEffects instead.
            	return new GameEffects();
        	}
    	}

    	private Canvas makeCloseableCanvas()
    	{
        	try
        	{
            	Class.forName("com.nokia.mid.ui.FullCanvas");

            	// If no exception was thrown, use a 'closeable Canvas'
            	// based on the vendor-specific FullCanvas class.
            	Class clas = Class.forName("NokiaCloseableCanvas");
            	return (Canvas) clas.newInstance();
        	}
        	catch (Exception e)
        	{
            	// If the vendor-specific FullCanvas API isn't available,
            	// use the default CloseableCanvas (derived from Canvas).
            	String closeLabel = dictionary.getString(dictionary.LABEL_BACK);
            	return new CloseableCanvas(closeLabel);
        	}
    	}

	void storeGame()
	{
		ByteArrayOutputStream gameBaos = new ByteArrayOutputStream();
		ByteArrayOutputStream planeBaos = new ByteArrayOutputStream();
		ByteArrayOutputStream bombBaos = new ByteArrayOutputStream();
		ByteArrayOutputStream buildingBaos = new ByteArrayOutputStream();

        	if (gameManager != null)
        	{
			// Set the continue flag depending on the game status
			if (gameManager.getStatus() == 3 || gameManager.getStatus() == 6)
				// Game was over so kill the continue flag
				Settings.setContinue(false);
			else
				// A game was in progress so save the continue flag
				Settings.setContinue(true);

			try
			{
				gameBaos = gameManager.getGameData();
				Settings.setValue(Settings.GM_MAIN_DATA, gameBaos);
			}
			catch(Exception e)
			{
				// We can not do anything to recover from this error,
				// let the game proceed without using saved settings.
				throw new IllegalArgumentException("Error in DestroyApp:try setValue (1)");
			}
			try
			{
				planeBaos = gameManager.getPlaneData();
				Settings.setValue(Settings.GM_PLANE_DATA, planeBaos);
			}
			catch(Exception e)
			{
				// We can not do anything to recover from this error,
				// let the game proceed without using saved settings.
				throw new IllegalArgumentException("Error in DestroyApp:try setValue (2)");
			}
			try
			{
				bombBaos = gameManager.getBombData();
				Settings.setValue(Settings.GM_BOMB_DATA, bombBaos);
			}
			catch(Exception e)
			{
				// We can not do anything to recover from this error,
				// let the game proceed without using saved settings.
				throw new IllegalArgumentException("Error in DestroyApp:try setValue (3)");
			}
			try
			{
				buildingBaos = gameManager.getBuildingData();
				Settings.setValue(Settings.GM_BUILD_DATA, buildingBaos);
			}
			catch(Exception e)
			{
				// We can not do anything to recover from this error,
				// let the game proceed without using saved settings.
				throw new IllegalArgumentException("Error in DestroyApp:try setValue (3)");
			}
			gameManager.stop();
        	}
	}
}