Wednesday, November 18, 2009
Can N900 and Maemo save nokia?
1. Abandon Symbian series 60 models in favor of Maemo.
2. Keep its series 40 line for dirt cheap mobile phones.
3. Develop a series 60 emulator that can run series 60 apps on Maemo phones.
4. Radically improve Maemo development tools. Let me elaborate on this. Compared to android and iPhone developer tools, Symbian series 60 tools have been really difficult to use. An entirely different sdk should be downloaded in order to support specific features found in specific models. And the SDK's were practically running only on Windows (and very specific versions of windows that is). Now, the new Maemo SDK is linux only, and it requires a lot of setup steps compared to android. So Nokia developers should make a move from windows to linux and from symbian to maemo. Whoa, that seems like a lot of work!
On the other hand the android SDK runs on windows, linux and MacosX, is simple to setup (at least compared to symbian and Maemo) and the emulator and the IDE are really simple to use and quite fast. In only one year android has 10,000+ apps and a lot of them are very good. Of course Nokia is starting to make some moves on the right direction. One of those moves is QT Creator, a very good cross - platform IDE, that can create QT apps that can be compiled for mobile platforms like Maemo, in good, old, speedy C++. But until Nokia bundles a simple to use QT Creator and Maemo SDK combo, I don't see developers fleeing their way.
However, N900, the first Maemo smartphone device, looks cool and packs a lot of power. But as we all know, the apps count, so Nokia should help developers write some cooool apps or it may be heading palm's way.
Friday, May 22, 2009
Robotic Space Rock 1.0.10 for android 1.5 (cupcake)
getHolder().setType(android.view.SurfaceHolder.
SURFACE_TYPE_GPU
);
Friday, May 1, 2009
New! Improved! The 1.5 android SDK is here.
Saturday, April 4, 2009
Robotic Space Rock and other games fell victims of the DMCA
For more information, or to contact us, please reply to this email, or visit the Android Market Help Center.
Thanks,
The Android Market Team
Now my application looks like this in the developer console:
Additionaly they forwarded me a four page fax they received from Norris, McNaughlin &
Marcus P.A. who represent the Tetris Company.
Here's the fax:
As you can see there are six applications listed for infringement:
Blocks, Cubik, Net Tetris, Netblocks, Robotics Space Rock, Tetroid
Actually, my application is called "Robotic Space Rock", not Robotics Space Rock. However I do not use the tetris name anywhere in my application, and I do not copy or reuse tetris related art or sound. The game mechanics are also quite different. And the application is free.
Thursday, February 26, 2009
Some lessons learned from the android market
So what are my conclusions for now:
1. Never, ever release an app, unless you thoroughly test it on a real device. If you don't get it passably right the first time, your app will be buried.
2. The phone memory limit is a severe limitation. My application has some original music. I wanted to add a couple of songs or more but I do not want to, because that would make it bigger and big apps, especially games are not going to stay on the phone for long. So keep your app small (under 1 MB) in order to maximize the chance of your application staying on the phone. Google should permit program installation on the SD card, increase the APK size limit and maybe increase the amount of internal storage to 1 GB or more.
3. Games are not that popular on the G1. It seems that geeks don't like gaming so much, or the games currently available are not so hot. So focus on applications, especially if you want to make some $$$.
4. Sound support for android is not good yet. If you use SoundPool, you increase the chance of your application hanging, making the user unhappy. I think that sound problems should be corrected immediately, because that affects all kinds of applications and especially games.
In my next blog entry I will try to compare android to iphone and symbian developer tools and market publishing. Stay tuned!
Saturday, February 7, 2009
Robotic Space Rock 1.0.8 beta released!
1. Added easy mode. Now the screen spins in Normal and Expert Difficulty. The screen does not move in Easy Difficulty.
2. Changed texture size to 32x32 from 64x64 in order to improve performance.
3. Changed the way explosions are drawn.
4. Added a game over sound effect.
5. Changed the way that playfield rotation is calculated by introducing a new LinearInterpolator class.
As always your remarks, bug reports and suggestions are welcome!
Thursday, February 5, 2009
A class for playing music and sound effects revisited
This is the Sound interface used to abstract soundplaying functions.
package org.teacake.monolith.apk;
public interface Sound {
public void addSound(int resid, boolean isLooping);
public void startSound();
public void stopSound();
public void stopSound(int resid);
public void playSound(int resid);
public void startMusic(int resid);
public void stopMusic(int resid);
public void pauseMusic(int resid);
public void resumeMusic(int resid);
}
And now for the main dish, SoundPoolManager class
package org.teacake.monolith.apk;
import android.media.SoundPool;
import android.util.Log;
class SoundPoolEvent
{
public SoundPoolEvent(int eventType,int eventSound)
{
this.eventType = eventType;
this.eventSound = eventSound;
}
public int eventType;
public int eventSound;
public static final int SOUND_PLAY=0;
public static final int SOUND_STOP=1;
public static final int SOUND_MUSIC_PLAY=2;
public static final int SOUND_MUSIC_PAUSE=3;
public static final int SOUND_MUSIC_STOP=4;
public static final int SOUND_MUSIC_RESUME=5;
}
class SoundStatus
{
public SoundStatus()
{
}
public static final int STATUS_LOOPING_NOT_STARTED=0;
public static final int STATUS_LOOPING_PAUSED=1;
public static final int STATUS_LOOPING_PLAYING=2;
}
public class SoundPoolManager extends Thread implements Sound
{
SoundPoolManager(android.content.Context context)
{
this.context = context;
soundEvents = new java.util.LinkedList();
sounds = new java.util.HashMap();
handles = new java.util.HashMap();
mediaPlayers = new java.util.HashMap();
isRunning = false;
}
public void addSound(int resid, boolean isLooping)
{
sounds.put(resid, new Boolean(isLooping));
if(isLooping)
{
try
{
android.media.MediaPlayer mp = android.media.MediaPlayer.create(context, resid);
mp.setLooping(true);
mp.seekTo(0);
//mp.prepare();
mediaPlayers.put(resid, mp);
//mp.seekTo(0);
//mp.setAudioStreamType(android.media.AudioManager.STREAM_MUSIC);
}
catch(Exception e)
{
Log.d("ERROR",e.getMessage());
}
}
}
public void run()
{
android.media.MediaPlayer mp = null;
while(isRunning)
{
try
{
while(soundEvents.size()>0)
{
SoundPoolEvent event = soundEvents.remove();
if(event!=null)
{
switch(event.eventType)
{
case SoundPoolEvent.SOUND_PLAY:
android.media.AudioManager mgr = (android.media.AudioManager) context.getSystemService(android.content.Context.AUDIO_SERVICE);
int streamVolume = mgr.getStreamVolume(android.media.AudioManager.STREAM_MUSIC);
soundPool.play(handles.get( event.eventSound).intValue(), streamVolume, streamVolume, 1, 0, 1.0f);
break;
case SoundPoolEvent.SOUND_STOP:
break;
case SoundPoolEvent.SOUND_MUSIC_PLAY:
currentPlayer = event.eventSound;
if(sounds.get(currentPlayer)!=null)
{
mp = mediaPlayers.get(currentPlayer);
if(!mp.isPlaying())
{
mp.seekTo(0);
mp.start();
}
}
break;
case SoundPoolEvent.SOUND_MUSIC_STOP:
currentPlayer = event.eventSound;
mp = mediaPlayers.get(currentPlayer);
mp.pause();
break;
case SoundPoolEvent.SOUND_MUSIC_PAUSE:
currentPlayer = event.eventSound;
mp = mediaPlayers.get(currentPlayer);
mp.pause();
break;
case SoundPoolEvent.SOUND_MUSIC_RESUME:
currentPlayer = event.eventSound;
mp = mediaPlayers.get(currentPlayer);
mp.start();
break;
}
}
}
}
catch(Exception e)
{
//Log.d("Error",e.getMessage());
}
try
{
this.wait(100);
//java.lang.Thread.currentThread().sleep(100);
}
catch(Exception e)
{
}
}
}
public void startSound()
{
this.soundPool = new android.media.SoundPool(this.sounds.size(),android.media.AudioManager.STREAM_MUSIC,100);
java.util.Iterator iterator = sounds.keySet().iterator();
while(iterator.hasNext())
{
int soundid = iterator.next().intValue();
int soundhandle = this.soundPool.load(this.context, soundid, 1);
handles.put(new Integer(soundid), new Integer(soundhandle));
}
isRunning=true;
this.start();
}
public void stopSound()
{
java.util.Iterator iterator = sounds.keySet().iterator();
while(iterator.hasNext())
{
int soundid = iterator.next().intValue();
if(this.sounds.get(soundid).booleanValue())
{
android.media.MediaPlayer mp = mediaPlayers.get(soundid);
mp.stop();
mp.release();
mp=null;
}
else
{
this.soundPool.pause( this.handles.get(soundid).intValue());
this.soundPool.stop(this.handles.get(soundid).intValue());
}
}
isRunning=false;
this.soundPool.release();
}
public int currentPlayer;
private boolean isRunning;
private java.util.HashMap sounds;
private java.util.HashMap handles;
private android.content.Context context;
private java.util.LinkedList soundEvents;
private java.util.HashMap mediaPlayers;
public void stopSound(int resid)
{
if(soundEvents!=null)
{
try
{
soundEvents.add(new SoundPoolEvent(SoundPoolEvent.SOUND_STOP,resid));
}
catch(Exception e)
{
}
}
}
public void playSound(int resid)
{
if(soundEvents!=null)
{
try
{
soundEvents.add(new SoundPoolEvent(SoundPoolEvent.SOUND_PLAY,resid));
this.notify();
}
catch(Exception e)
{
}
}
}
public void startMusic(int resid)
{
if(soundEvents!=null)
{
try
{
soundEvents.add(new SoundPoolEvent(SoundPoolEvent.SOUND_MUSIC_PLAY,resid));
this.notify();
}
catch(Exception e)
{
}
}
}
public void stopMusic(int resid)
{
if(soundEvents!=null)
{
try
{
soundEvents.add(new SoundPoolEvent(SoundPoolEvent.SOUND_MUSIC_STOP,resid));
this.notify();
}
catch(Exception e)
{
}
}
}
public void pauseMusic(int resid)
{
if(soundEvents!=null)
{
try
{
soundEvents.add(new SoundPoolEvent(SoundPoolEvent.SOUND_MUSIC_PAUSE,resid));
this.notify();
}
catch(Exception e)
{
}
}
}
public void resumeMusic(int resid)
{
if(soundEvents!=null)
{
try
{
soundEvents.add(new SoundPoolEvent(SoundPoolEvent.SOUND_MUSIC_RESUME,resid));
this.notify();
}
catch(Exception e)
{
}
}
}
SoundPool soundPool;
}
How do you use it?
First create an instance of the class.
Then add the resources to the SoundPoolManager (Sounds and music tracks)
Then start the SoundManager thread.
Then use the playSound() method to play a sound effect or playMusic() to play a song.
SoundPoolManager m = new SoundPoolManager(context);
m.addSound(R.raw.bang, false);
m.addSound(R.raw.mysong,true);
m.startSound();
m.playSound(R.raw.bang);
m.playMusic(R.raw.mysong);
If you want to pause the music use the pause call.
Use the stopSound() method to stop the sound thread.
The code is crude and the method names are not quite appropriate but it is published under the assumption that you may find it useful. You can take a look at the Robotic Space Rock code found at http://code.google.com/p/monolithandroid for actual examples.
Wednesday, January 28, 2009
MonolithAndroid renamed to Robotic Space Rock
Thursday, January 22, 2009
How to display a license agreement on your android application.
We can use the shared preference mechanism to check if the user has agreed to the license agreement during the activity. If the user has previously agreed to the license then we proceed as normal. Otherwise, we show him the EULA. If the user checks the "I accept the license agreement" checkbox and presses OK, then we write to the preferences that the user accepted the license. If the user presses Cancel, we exit the app. You can see this in the following code excerpt
private android.widget.CheckBox checkboxAcceptLicense;
private android.widget.Button buttonOK;
private android.widget.Button buttonCancel;
private android.widget.TextView textviewLicense;
public SharedPreferences.Editor prefsEditor;
public SharedPreferences prefs;
public android.view.View licenseView;
private boolean soundInitialized;
/** Called when the activity is first created. */
@Override
public void onCreate(Bundle icicle) {
super.onCreate(icicle);
soundInitialized = false;
prefs = this.getPreferences(android.content.Context.MODE_PRIVATE);
prefsEditor = prefs.edit();
if(!prefs.getBoolean("LicenseAccepted", false))
{
//this.licenseView = this.findViewById(R.layout.licenseagreement);
this.licenseView = View.inflate(this, R.layout.licenseagreement, null);
this.setContentView(licenseView);
this.checkboxAcceptLicense = (android.widget.CheckBox)this.findViewById(R.id.checkLicenseAgreement);
this.textviewLicense = (android.widget.TextView)this.findViewById(R.id.textviewLicenseAgreement);
this.buttonOK= (android.widget.Button)this.findViewById(R.id.buttonOK);
this.buttonCancel = (android.widget.Button)this.findViewById(R.id.buttonCancel);
this.buttonCancel.setOnClickListener(
new View.OnClickListener()
{
public void onClick(View view)
{
exitNotAcceptedApplication();
}
}
);
this.buttonOK.setOnClickListener(
new View.OnClickListener()
{
public void onClick(View view)
{
if(checkboxAcceptLicense.isChecked())
{
prefsEditor.putBoolean("LicenseAccepted", true);
prefsEditor.commit();
licenseView.setVisibility(View.INVISIBLE);
initActivity();
}
}
}
);
}
else
{
initActivity();
}
}
the initActivity() method contains the actual code that you would normally execute on the onCreate() method of your Activity. The layout file for the license agreement is the following (licenseagreement.xml):
xml version="1.0" encoding="utf-8"?>
<LinearLayout
android:id="@+id/widget24"
android:layout_width="fill_parent"
android:layout_height="fill_parent"
android:background="#ffffffff"
android:padding="0px"
xmlns:android="http://schemas.android.com/apk/res/android"
android:orientation="vertical"
>
<TextView
android:id="@+id/textviewLicenseAgreement"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:padding="0px"
android:text="Monolith Android Licence Agreement. This software package is provided to you, the end user, by the sofware package creator, Tasos Kleisas, as is. The software package is provided free of charge by the developer. However, the means of delivering the software to your device, (mobile phone, computer or other) may induce a service fee. The developer cannot be held responsible for any damage or loss that you may suffer by the use or installation of this application package to your device. Use at your own risk. The code, sound effects, and music are copyrighted by Tasos Kleisas (C) 2007-2009."
android:textSize="14sp"
android:textColor="#000000"
android:typeface="normal"
android:textStyle="normal"
android:layout_weight="0"
android:layout_gravity="left"
>
TextView>
<CheckBox
android:id="@+id/checkLicenseAgreement"
android:layout_width="fill_parent"
android:layout_height="wrap_content"
android:text="I accept the license agreement"
android:textColor="#000000"
android:textSize="12sp"
android:typeface="normal"
android:textStyle="normal"
android:checked="false"
android:orientation="horizontal"
>
CheckBox>
<TableRow
android:id="@+id/widget32"
android:layout_width="fill_parent"
android:layout_height="wrap_content"
android:orientation="horizontal"
>
<Button
android:id="@+id/buttonOK"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:padding="10px"
android:text="OK"
android:textSize="14sp"
android:typeface="normal"
android:textStyle="normal"
android:layout_weight="0"
android:layout_gravity="left"
>
Button>
<Button
android:id="@+id/buttonCancel"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:padding="10px"
android:text="Cancel"
android:textSize="14sp"
android:typeface="normal"
android:textStyle="normal"
android:layout_weight="0"
android:layout_gravity="left"
>
Button>
TableRow>
LinearLayout>
Unfortunately, as you can see the server messed up the xml layout a bit. But you can find the full code at http://code.google.com/p/monolithandroid/source/browse/
Android 3D graphics and SurfaceView
getHolder().setType(android.view.SurfaceHolder.SURFACE_TYPE_NORMAL);
on a real device, however, you may get a blank screen, or very slow redraws, so you should use this:
getHolder().setType(android.view.SurfaceHolder.
SURFACE_TYPE_GPU
);
or even this:
getHolder().setType(android.view.SurfaceHolder.
SURFACE_TYPE_HARDWARE
);
So i came up with this solution for the SurfaceView initialization:
public GameSurfaceView(Context context,GameOverlay overlay,Sound soundManager)
{
super(context);
this.soundManager = soundManager;
this.context = context;
this.overlay = overlay;
this.viewType = GLThread.VIEW_INTRO;
this.gameType = Game.GAME_MONOLITH;
getHolder().addCallback(this);
try
{
getHolder().setType(android.view.SurfaceHolder.
SURFACE_TYPE_GPU
);
}
catch(Exception e)
{
try
{
getHolder().setType(android.view.SurfaceHolder.
SURFACE_TYPE_HARDWARE
);
}
catch(Exception e2)
{
try
{
getHolder().setType(android.view.SurfaceHolder.SURFACE_TYPE_NORMAL);
}
catch(Exception e3)
{
}
}
}
}
So in the code above, we first try to get a hardware accelerated surface (fastest), if that fails a gpu memory surface(still fast) and if that fails a normal software surface.
Tuesday, January 20, 2009
MonolithAndroid 1.0.4 beta is out
1. Switched from using media player for sound effects and music to a hybrid SoundPool / MediaPlayer implementation. Now the sounds are played using SoundPool and the music is played with MediaPlayer. Of course some problems remain. The most important problem is that the music cannot reliably be stopped.
2. Added a highscore table. Now you can find out who is the best player. The highscore table persists, so if you restart the game, your highscore is still there.
3. Added an options menu. Now you can select the type of game you want to play, the level and the difficulty. Two types of game are provided: Classic, which resembles a well known 6 letter game, and Monolith. Monolith introduces special white blocks. If you complete a line with a white block in it, the game grid evolves according to Conway's game of life. The difficulty setting enables you to choose between two settings. Normal is your meat and potatoes game. You can drag the touch screen to rotate the playfield. That may be useful practice for the expert difficulty mode. In Expert, the playfield rotates in various axes (depending on the level you currently play) so if you suffer from motion sickness do not play this mode! Ahhh, you have been warned! The level (1-10) determines the speed of the falling blocks as well as the rotation of the screen in expert mode. In the options screen you can enable/disable the music (not currently working) and the sound effects of the game. When you are happy with the game options go to OK, press right and then choose Play to start your game.
4. Changed the music format from mp3 to ogg because it reportedly causes less crashes on the MediaPlayer.
5. The program now exits if you press the back or the home button.
A bit of a warning... I do not currently own an android hardware device, because they are not available yet in Greece where I live. So if you happen to install the game on a real device I would like to hear your comments and bug reports. You can download a signed apk from http://code.google.com/p/monolithandroid/downloads/list. Choose the monolithandroid 1.0.4 beta apk. You can post your comments here, or you can use the issue tracker found on http://code.google.com/p/monolithandroid/issues/list
Here's a grainy video made from the emulator. You can almost hear me talking in the background...
Wednesday, January 7, 2009
Monolithandroid 1.0.3 beta release
Tuesday, January 6, 2009
monolithandroid 1.0.2 beta version update
A new apk is up for grabs. I am referring to the monolithandroid 1.0.2 beta which can be found at http://code.google.com/p/monolithandroid/downloads/list The new apk uses the
setType(SurfaceHolder.SURFACE_TYPE_GPU) parameter during the initialization of the display surface. Maybe the omission of this parameters caused the black screens on the G1 devices in the previous releases. However this change has caused the textures to appear incorrectly in the emulator.Note the picture on the left. The texture is full of black holes. I do not know if this occurs in an actual hardware device however... Can a guy with a real phone try it out and tell us the result?