J2ME Animation using repaint( ) method

In this part of J2ME Image Tutorial, we are going to show you how to create an Image with animation. Here we have create a class called ImageAanimation that extends MIDlet and implements the CommandListner class.

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J2ME Animation using repaint( ) method

     

In this part of J2ME Image Tutorial, we are going to show you how to create an Image with animation. Here we have create a class called ImageAanimation that extends MIDlet and implements the CommandListner class. We have also used the predefined Canvas class to show the animation and image. For this, we have created a ImageCanvas2 class that extends the Canvas class to draw the animation and blink the image for a given period of time. To draw the image we are using the following methods:

  • image = Image.createImage("/cartoondog.png");   
  • frame_width = image.getWidth();   
  • frame_height = image.getHeight();

 

 

 

And when image created then we can appear this image using this methods:

while(run_thread){
 Thread.sleep((frame_index == Frame_Count - 1) ? 
   Last_Frame_Count : Frame_Hold);

 int last_frame_index = frame_index;
 frame_index = (frame_index + 1) % Frame_Count;
 int repaint_left = position[last_frame_index];
 int repaint_right = position[frame_index];
  
 if(position[last_frame_index] > position[frame_index]){
 repaint_left = position[frame_index];
 repaint_right = position[last_frame_index];
 }
 repaint_left = (repaint_left * run_length) >> 10;
 repaint_right = (repaint_right * run_length) >> 10;
 repaint(repaint_left, 0, frame_width + repaint_right - 
   repaint_left, frame_height);

}

The Application is as follows:

Source Code ImageAnimation.java

import javax.microedition.midlet.*;
import javax.microedition.lcdui.*;

public class ImageAnimation extends MIDlet implements CommandListener{
  private Display  display;
  private Command exit;
  
  protected void startApp(){
  display = Display.getDisplay(this);
  ImageCanvas2 canvas = new ImageCanvas2();
  exit = new Command("Exit", Command.EXIT, 1);
  canvas.addCommand(exit);
  canvas.setCommandListener(this);
  display.setCurrent(canvas);
  }
  
  protected void pauseApp(){}
  
  protected void destroyApp(boolean unconditional){
  notifyDestroyed();
  }
  
  public void commandAction(Command c, Displayable d){
  String label = c.getLabel();
  if(label.equals("Exit")) {
  destroyApp(true);
  }
  }
}

class ImageCanvas2 extends Canvas implements Runnable{
  int Frame_Count = 17;
  int Frame_Hold = 70000;
  int Last_Frame_Count = 300;
  int[] position = {
  0, 50, 186, 372, 558, 744, 930, 1024, 1024,
  834, 651, 465, 279, 93, 0, 0, 0};
  
  private Image image;
  int frame_width = 0;
  int frame_height = 0;
  int frame_index = 0;
  int run_length = 0;
  boolean run_thread = false;

  protected void showNotify(){
  try{
  image = Image.createImage("/cartoondog.png");
  frame_width = image.getWidth();
  frame_height = image.getHeight();
  } catch (Exception ioe) {
  return;
  }
  run_length = getWidth() - frame_width;
  run_thread = true;
  frame_index = 0;
  new Thread(this).start();
  }

  protected void hideNotify(){
  run_thread = false;
  }

  public void run(){
  try{
  while(run_thread){
  Thread.sleep((frame_index == Frame_Count - 1) ? 
  Last_Frame_Count : Frame_Hold);
  int last_frame_index = frame_index;
  frame_index = (frame_index + 1) % Frame_Count;
  int repaint_left = position[last_frame_index];
  int repaint_right = position[frame_index];
  
  if(position[last_frame_index] > position[frame_index]){
  repaint_left = position[frame_index];
  repaint_right = position[last_frame_index];
  }
  repaint_left = (repaint_left * run_length) >> 10;
  repaint_right = (repaint_right * run_length) >> 10;
  repaint(repaint_left, 0, frame_width + repaint_right - 
  repaint_left, frame_height);
  }
  }catch(Exception e){}
  }

  public void paint(Graphics g){
  g.setColor(0, 0, 255);
  g.fillRect(0, 0, getWidth(), getHeight());
  g.translate((position[frame_index] * run_length) >> 10, 0);
  g.clipRect(0, 0, frame_width, frame_height);
  g.drawImage(image, 0, -(frame_index * frame_height), 
  Graphics.LEFT + Graphics.TOP);
  }
} 

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Comments:3
menpara bhargavi
February 1, 2013
j2me

i like this subject
Mamta
February 2, 2012
about j2me animatin in tybca lavel

clear all defination at bca lavle i am very happy for your visited website
Subhajit
April 29, 2012
image?

where is the image file

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