package com.jumper.utility;
import net.rim.device.api.ui.UiApplication;
import net.rim.device.api.system.GIFEncodedImage;
import net.rim.device.api.ui.Graphics;
import net.rim.device.api.ui.component.BitmapField;
//A field that displays an animated GIF.
public class AnimatedGIFField extends BitmapField
{
private GIFEncodedImage _image; //The image to draw.
private int _currentFrame; //The current frame in the animation sequence.
private int _width; //The width of the image (background frame).
private int _height; //The height of the image (background frame).
private AnimatorThread _animatorThread;
public AnimatedGIFField(GIFEncodedImage image)
{
this(image, 0);
}
public AnimatedGIFField(GIFEncodedImage image, long style)
{
//Call super to setup the field with the specified style.
//The image is passed in as well for the field to configure its required size.
super(image.getBitmap(), style);
//Store the image and it's dimensions.
_image = image;
_width = image.getWidth();
_height = image.getHeight();
//Start the animation thread.
_animatorThread = new AnimatorThread(this);
_animatorThread.start();
}
protected void paint(Graphics graphics)
{
//Call super.paint. This will draw the first background frame and handle any required focus drawing.
super.paint(graphics);
//Don't redraw the background if this is the first frame.
if (_currentFrame != 0)
{
//Draw the animation frame.
graphics.drawImage(_image.getFrameLeft(_currentFrame), _image.getFrameTop(_currentFrame),
_image.getFrameWidth(_currentFrame), _image.getFrameHeight(_currentFrame), _image, _currentFrame, 0, 0);
}
}
//Stop the animation thread when the screen the field is on is
//popped off of the display stack.
protected void onUndisplay()
{
_animatorThread.stop();
super.onUndisplay();
}
//A thread to handle the animation.
private class AnimatorThread extends Thread
{
private AnimatedGIFField _theField;
private boolean _keepGoing = true;
private int _totalFrames; //The total number of frames in the image.
private int _loopCount; //The number of times the animation has looped (completed).
private int _totalLoops; //The number of times the animation should loop (set in the image).
public AnimatorThread(AnimatedGIFField theField)
{
_theField = theField;
_totalFrames = _image.getFrameCount();
_totalLoops = _image.getIterations();
}
public synchronized void stop()
{
_keepGoing = false;
}
public void run()
{
while(_keepGoing)
{
//Invalidate the field so that it is redrawn.
UiApplication.getUiApplication().invokeAndWait(new Runnable()
{
public void run()
{
_theField.invalidate();
}
});
try
{
//Sleep for the current frame delay before the next frame is drawn.
sleep(_image.getFrameDelay(_currentFrame) * 10);
}
catch (InterruptedException iex)
{} //Couldn't sleep.
//Increment the frame.
++_currentFrame;
if (_currentFrame == _totalFrames)
{
//Reset back to frame 0 if we have reached the end.
_currentFrame = 0;
++_loopCount;
//Check if the animation should continue.
if (_loopCount == _totalLoops)
{
_keepGoing = false;
}
}
}
}
}
}
then use this..
GIFEncodedImage bitmapImage=(GIFEncodedImage)GIFEncodedImage.getEncodedImageResource("img/loader.gif");
AnimatedGIFField image_field=new AnimatedGIFField(bitmapImage);
add(image_field)
