I am getting an error about 'Source Not Found' for Instrumental.class when '(new Thread(new AnimationLoop())).start();' is executed.


Any ideas?

Hello 2All,

Thanks for this useful tutorial.

I have a question regarding to this.
The question is like this: "If I want to move the box in TOP and DOWN direction, what changes I have to do in this code."

Please suggest me.

~Dhr

Hello 2All,

Thanks for this useful tutorial.

I have a question regarding to this.
The question is like this: "If I want to move the box in TOP and DOWN direction, what changes I have to do in this code."

Please suggest me.

~Dhr

Danuubz wrote:I've got a litte code sample for 2D animating on a simple UI extending View (wich is a little bit different from the SurfaceView approach, more like J2SE).

Red box is moving from one edge to the other. You can stop (and restart) him by pressing DPAD_CENTER.

Syntax: [ Download ] [ Hide ]

Syntax: [ Download ] [ Show ]

Using java Syntax Highlighting

1. // author: Robert Kanzamar
2. package de.testing;
3.  
4. import android.app.Activity;
5. import android.os.Bundle;
6. import android.view.*;
7. import android.graphics.*;
8. import android.content.*;
9.  
10. public class Testing extends Activity
11. {      
12.         public static final int DIRECTION_RIGHT = 0, DIRECTION_LEFT = 1;
13.        
14.         private Panel main;
15.         private Bitmap scratch;
16.         private Canvas offscreen;
17.        
18.         public boolean start = true;
19.         private volatile boolean running = true;
20.         private int direction = DIRECTION_RIGHT;
21.        
22.         private int box = 10;
23.        
24.     @Override
25.     public void onCreate(Bundle savedInstanceState)
26.     {
27.         super.onCreate(savedInstanceState);  
28.        
29.         setOffscreenBitmap();
30.        
31.         main = new Panel(this);        
32.         setContentView(main,new ViewGroup.LayoutParams(320,480));
33.        
34.         (new Thread(new AnimationLoop())).start();
35.     }
36.    
37.     private void setOffscreenBitmap()
38.     {
39.          scratch = Bitmap.createBitmap(30,30,Bitmap.Config.ARGB_8888);
40.          offscreen = new Canvas();
41.          offscreen.setBitmap(scratch);
42.          offscreen.drawColor(Color.RED);
43.     }
44.    
45.     private synchronized void updatePhysics()
46.     {
47.         if(box < 10)
48.         {
49.                 direction = DIRECTION_RIGHT;
50.         }
51.         else if(box > 250)
52.         {
53.                 direction = DIRECTION_LEFT;
54.         }
55.        
56.         if(direction == DIRECTION_RIGHT)
57.         {
58.                 box += 10;
59.         }
60.         else
61.         {
62.                 box -= 10;
63.         }
64.     }
65.    
66.     private synchronized void doDraw(Canvas canvas, Paint paint)
67.     {
68.         if(start)
69.                 {
70.                         canvas.drawColor(Color.BLACK);
71.                         canvas.drawBitmap(scratch,10,10,paint);
72.                         start = false;
73.                 }
74.                 else
75.                 {              
76.                 canvas.save();
77.                 canvas.clipRect(box,8,box+32,40);              
78.                 canvas.drawColor(Color.RED);
79.                 // canvas.drawBitmap(scratch,box,10,paint);
80.                 canvas.restore();              
81.                 }
82.     }
83.    
84.     @Override
85.     public boolean onKeyDown(int keyCode, KeyEvent event)
86.     {
87.         if(keyCode == KeyEvent.KEYCODE_DPAD_CENTER)
88.         {
89.                 if(running)
90.                 {
91.                         running = false;
92.                 }
93.                 else
94.                 {
95.                         running = true;
96.                 }
97.         }
98.         else if (keyCode == KeyEvent.KEYCODE_DPAD_DOWN)
99.         {
100.                 finish();
101.         }
102.        
103.         return true;
104.     }
105.    
106.     class Panel extends View
107.     {
108.         Paint paint;
109.        
110.         public Panel(Context context)
111.         {
112.                 super(context);
113.                 paint = new Paint();
114.         }
115.        
116.         @Override
117.         protected void onDraw(Canvas canvas)
118.         {
119.                 doDraw(canvas,paint);
120.         }
121.     }
122.    
123.     class AnimationLoop implements Runnable
124.     {
125.         public void run()
126.         {
127.                 while(true)
128.                 {
129.                         while(running)
130.                         {                                      
131.                                 try
132.                                 {
133.                                         Thread.sleep(30);
134.                                 }
135.                                 catch(InterruptedException ex) {}
136.                                
137.                                 updatePhysics();
138.                                 main.postInvalidate();
139.                         }
140.                 }
141.         }
142.     }    
143. }

Parsed in 0.041 seconds, using GeSHi 1.0.8.4

I just tried creating a new project with this source code. Eclipse can launch this app without any errors but I get nothing in the emulator! The home screen remains the same. What could I have possibly done wrong?

Looks like everything went smoothly:

[2010-10-22 12:59:04 - test2D] Performing sync
[2010-10-22 12:59:04 - test2D] Automatic Target Mode: Preferred AVD 'AVD1.6' is available on emulator 'emulator-5554'
[2010-10-22 12:59:05 - test2D] Application already deployed. No need to reinstall.
[2010-10-22 12:59:05 - test2D] \test2D\bin\test2D.apk installed on device
[2010-10-22 12:59:05 - test2D] Done!

Thanks.

HI everyone, this is my first time posting here. I'm working on a weather guide app and I don't know what type of graphics would be best to use 2D or 3D? I'm also looking for any tutorials on using graphics in Android. Thanks

Hi guys!, i'm making a word search game right now... I've done with the algorithm and so on, but I'm facing new problem...

I want to paint the characters that are being choosen by user to match a word. actually, I'm using gridview to placed the characters...

Here's the code

Code: Select all

public class GridAlpha extends Activity{
int BOARD=8;
String[]rep = new String[50];
String[]def = new String[64];
String LETTERS = "abcdefghijklmnopqrstuvwxyz";
String[][]square = new String[8][8];

/** Called when the activity is first created. */
@Override
public void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    setContentView(R.layout.main);

    KamusDbAdapter x = new KamusDbAdapter(getApplicationContext());
    x.open();
    rep = x.playWord();
    x.close();


    Random round = new Random();int[]rec=new int[10];int m=0;
    for(int i=0; i<50; i++){
        //algorithm section, used to place the words inside the grid per char
    }
    //additional logic, used to store the char in string that will be use in gridview
    //Log.v("CC",String.valueOf(cc));

    ArrayAdapter<String> ad = new ArrayAdapter<String>(this,R.layout.form,def);
    GridView grid=(GridView)findViewById(R.id.grid);
    grid.setAdapter(ad);

    grid.setOnItemClickListener(new OnItemClickListener(){
        @Override
        public void onItemClick(AdapterView<?> arg0, View arg1, int arg2,
                long arg3) {
            String test = (ad.getItem(arg2)).toString();
            Log.v("CAPTURE",test);
        }
    });

    ListView wordlist = (ListView)findViewById(R.id.wordlist);
    ArrayAdapter<String> showWord = new ArrayAdapter<String>(this,R.layout.form2,store);
    wordlist.setAdapter(showWord);

}

}


I think that's all that I can explain right now... if you are confuse with my question, just go to the screenshot link below

http://stat001.ameba.jp/user_images/201 ... 405137.png

*I just want to paint the selected words inside the gridview, that's all...

Best regards,

Thanks for the template. It's helps make it easier to understand what the basics are compared to lunarlander.

In layout main.xml FILL_PARENT has been renamed MATCH_PARENT in android api level 8 and higher. I'm not sure if this matters but I thought I'd point it out.

Hi!
@ MrSnowflake:
I used your stripped LunarLander template to transform a javascript game I wrote for my SONY PRS500 ebook reader.
All works very fine - much, much nicer than on my old FOUR grayscale display!
Problem is, if I pause the game (home button, starting background app) it crashes upon resume/restart...
Do you think, you can point to the code that's missing now - even update your template?
Thanks, Clemens

EDIT:
I just found out that the original sdk-sample crashes, too ...

Nevermind.. Thanks for the template!

hello,
I was hoping someone here can help me out. I'm trying to use this template but I get an error when the program closes. It seems to be a problem with how the thread is paused and I cant figure out how to fix it. as i said the error seems to be here:
other then adding the error catching, i didnt change anything.

Code: Select all

        /**
         * Pauses the physics update & animation.
         */
        public void pause() {           
           try{             
           synchronized (mSurfaceHolder) {
                   setState(STATE_PAUSE);
            }
           }catch(Exception e){
              Log.d("error pausing" , "error: "  +e.toString());
           }
        }


Code: Select all

public void pause() {           
           try{                  
            synchronized (mSurfaceHolder) {
                   setState(STATE_PAUSE);
            }
           }catch(Exception e){
              Log.d("error pausing" , "error: "  +e.toString());
           }
        }

this error occurs with the app is closed down but clicking the home button. the stack trace is this:

05-17 00:05:08.161: INFO/ActivityManager(52): Starting activity: Intent { act=android.intent.action.MAIN cat=[android.intent.category.HOME] flg=0x10200000 cmp=com.android.launcher/.Launcher }
05-17 00:05:08.191: DEBUG/AndroidRuntime(326): Shutting down VM
05-17 00:05:08.191: WARN/dalvikvm(326): threadid=3: thread exiting with uncaught exception (group=0x4001b188)
05-17 00:05:08.191: ERROR/AndroidRuntime(326): Uncaught handler: thread main exiting due to uncaught exception
05-17 00:05:08.281: ERROR/AndroidRuntime(326): java.lang.RuntimeException: Unable to pause activity {eu.MrSnowflake.android.gametemplate/eu.MrSnowflake.android.gametemplate.GameTemplate}: java.lang.NullPointerException
05-17 00:05:08.281: ERROR/AndroidRuntime(326): at android.app.ActivityThread.performPauseActivity(ActivityThread.java:3162)
05-17 00:05:08.281: ERROR/AndroidRuntime(326): at android.app.ActivityThread.performPauseActivity(ActivityThread.java:3119)
05-17 00:05:08.281: ERROR/AndroidRuntime(326): at android.app.ActivityThread.handlePauseActivity(ActivityThread.java:3102)
05-17 00:05:08.281: ERROR/AndroidRuntime(326): at android.app.ActivityThread.access$2400(ActivityThread.java:119)
05-17 00:05:08.281: ERROR/AndroidRuntime(326): at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1870)
05-17 00:05:08.281: ERROR/AndroidRuntime(326): at android.os.Handler.dispatchMessage(Handler.java:99)
05-17 00:05:08.281: ERROR/AndroidRuntime(326): at android.os.Looper.loop(Looper.java:123)
05-17 00:05:08.281: ERROR/AndroidRuntime(326): at android.app.ActivityThread.main(ActivityThread.java:4363)
05-17 00:05:08.281: ERROR/AndroidRuntime(326): at java.lang.reflect.Method.invokeNative(Native Method)
05-17 00:05:08.281: ERROR/AndroidRuntime(326): at java.lang.reflect.Method.invoke(Method.java:521)
05-17 00:05:08.281: ERROR/AndroidRuntime(326): at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:860)
05-17 00:05:08.281: ERROR/AndroidRuntime(326): at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:618)
05-17 00:05:08.281: ERROR/AndroidRuntime(326): at dalvik.system.NativeStart.main(Native Method)
05-17 00:05:08.281: ERROR/AndroidRuntime(326): Caused by: java.lang.NullPointerException
05-17 00:05:08.281: ERROR/AndroidRuntime(326): at eu.MrSnowflake.android.gametemplate.GameTemplate.onPause(GameTemplate.java:112)
05-17 00:05:08.281: ERROR/AndroidRuntime(326): at android.app.Activity.performPause(Activity.java:3782)
05-17 00:05:08.281: ERROR/AndroidRuntime(326): at android.app.Instrumentation.callActivityOnPause(Instrumentation.java:1190)
05-17 00:05:08.281: ERROR/AndroidRuntime(326): at android.app.ActivityThread.performPauseActivity(ActivityThread.java:3149)
05-17 00:05:08.281: ERROR/AndroidRuntime(326): ... 12 more
05-17 00:05:08.321: INFO/Process(52): Sending signal. PID: 326 SIG: 3
05-17 00:05:08.321: INFO/dalvikvm(326): threadid=7: reacting to signal 3
05-17 00:05:08.321: ERROR/dalvikvm(326): Unable to open stack trace file '/data/anr/traces.txt': Permission denied
05-17 00:05:08.851: WARN/ActivityManager(52): Activity pause timeout for HistoryRecord{43ba7338 eu.MrSnowflake.android.gametemplate/.GameTemplate}
05-17 00:05:08.871: INFO/ARMAssembler(52): generated scanline__00000077:03515104_00000000_00000000 [ 33 ipp] (47 ins) at [0x34ee40:0x34eefc] in 586958 ns
05-17 00:05:14.721: DEBUG/dalvikvm(120): GC freed 495 objects / 19896 bytes in 169ms
05-17 00:05:17.241: ERROR/gralloc(52): [unregister] handle 0x2d2a48 still locked (state=40000001)
05-17 00:05:17.351: INFO/Process(326): Sending signal. PID: 326 SIG: 9
05-17 00:05:17.382: INFO/WindowManager(52): WIN DEATH: Window{43d52c08 eu.MrSnowflake.android.gametemplate/eu.MrSnowflake.android.gametemplate.GameTemplate paused=false}
05-17 00:05:17.382: INFO/WindowManager(52): WIN DEATH: Window{43cc42c8 SurfaceView paused=false}
05-17 00:05:17.391: INFO/ActivityManager(52): Process eu.MrSnowflake.android.gametemplate (pid 326) has died.
05-17 00:08:17.561: DEBUG/dalvikvm(52): threadid=15: bogus mon 1+0>0; adjusting