Transparent display of Popup in Blackberry

Hello

I found a work around for a transparent popup on any blackberry screen. I would like to share my code here.

The PopupScreen class is as follows:

/*******************************************************************************************************/

Import net.rim.device.api.system.GIFEncodedImage;
Import net.rim.device.api.ui.Color;
Import net.rim.device.api.ui.Field;
Import net.rim.device.api.ui.Font;
Import net.rim.device.api.ui.Keypad;
Import net.rim.device.api.ui.XYEdges;
Import net.rim.device.api.ui.component.LabelField;
Import net.rim.device.api.ui.container.PopupScreen;
Import net.rim.device.api.ui.container.VerticalFieldManager;
Import net.rim.device.api.ui.decor.Background;
Import net.rim.device.api.ui.decor.BackgroundFactory;
Import net.rim.device.api.ui.decor.Border;
Import net.rim.device.api.ui.decor.BorderFactory;

SerializableAttribute public class PopupLoadingScreen extends PopupScreen {}

Font fntPlain = Font.getDefault () .derive (Font.PLAIN, 20);
private AnimatedGIFField anmtFldCycle = null;
private LabelField lblMessage = null;
Private GIFEncodedImage gifImgCycle;

public PopupLoadingScreen (String text) {}

Super (new VerticalFieldManager (VerticalFieldManager.VERTICAL_SCROLL
| VerticalFieldManager.VERTICAL_SCROLLBAR));

Background bg = BackgroundFactory.createSolidTransparentBackground)
Color.WHITE, 0);
this.setBackground (bg);

Border = BorderFactory.createRoundedBorder (new XYEdges(),
Border.STYLE_TRANSPARENT);
this.setBorder (border);

gifImgCycle = GIFEncodedImage (GIFEncodedImage)
.getEncodedImageResource("LoadingSpinner.gif");// greenloadingspinner.gif
anmtFldCycle = new AnimatedGIFField (gifImgCycle, Field.FIELD_HCENTER);
Add (anmtFldCycle);

lblMessage = new LabelField (text, Field.FIELD_HCENTER);
lblMessage.setFont (Font.getDefault () .derive (Font.PLAIN, 20));
Add (lblMessage);

}

/ / This will overwrite the DOS on a button on the PHONE
{} public boolean keyDown (keycode, int, int status)

If (Keypad.key (keycode) == Keypad.KEY_ESCAPE) {}
Returns true;
}
Return super.keyDown (keycode, status);
}

/**
* This replaces the closing functionality in the default BB menu any
* screen
*/
public boolean onClose() {}
UiApplication.getUiApplication () .requestBackground ();
Returns false;
}
}

/ * GIF ANIME FIELD class * /.

package com.test;

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 image.

SerializableAttribute public class AnimatedGIFField extends BitmapField {}
private GIFEncodedImage _image; The image to draw.
private int _currentFrame; The current image of the animation sequence.
Private AnimatorThread _animatorThread;

public AnimatedGIFField (image GIFEncodedImage) {}
This (image, 0);
}

public AnimatedGIFField (picture of GIFEncodedImage, long style) {}
Call great to set up the field with the specified style.
The image went as well for the domain configure sound
required size.
Super (image.getBitmap (), style);

Store the image.
_image = image;

Start the animation thread.
_animatorThread = new AnimatorThread (this);
_animatorThread.start ();
}

protected void paint (Graphics graphics) {}
Call the super.paint. This will draw the first background image and
manage all necessary development of drawing.
Super.Paint (Graphics);

Do not redraw the background if it comes to the first image.
If (_currentFrame! = 0) {}
Draw the image animation.
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 is the field is
depile display.
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 images in the image.
private int _loopCount; The number of times that the loop animation
(completed).
private int _totalLoops; The number of times that that animation should

loop (defined in the image).

public AnimatorThread (AnimatedGIFField region) {}
_theField = theDomain;
_totalFrames = _image.getFrameCount ();
_totalLoops = _image.getIterations ();

}

public synchronized void stop() {}
_keepGoing = false;
}

public void run() {}
so that {(_keepGoing)
Invalidate the field so that it is redrawn.
UiApplication.getUiApplication () .invokeAndWait (new Runnable() {}
public void run() {}
_theField.Invalidate ();
}
});

try {}
Sleep during the framework period currently before the next image
is drawn.
Sleep (_image.getFrameDelay (_currentFrame) * 10);
} catch (InterruptedException iex) {}
} / / Could not sleep.

Increment the frame.
++ _currentFrame;

If (_currentFrame, _totalFrames)) {}
Reset to 0 if we've reached the end.
_currentFrame = 0;

++ _loopCount;

Check whether the animation should continue.
If (_loopCount == _totalLoops) {}
_keepGoing = false;
}
}
}
}
}
}

/*******************************************************************************************************/

That's how I put the bottom of my main class where I show the Popup screen

Background bg = BackgroundFactory.createSolidTransparentBackground)
Color.WHEAT, 0);
getMainManager () .setBackground (bg);

For the popup and the class screen I put the background color as Color.WHITE, and the GlobalAlpha is set to '0 '.

I press the PopupScreen class at the simple button click. In fact, it's a screen of loading with a GIF image in it. The link to the GIF images is given below

http://www.Google.co.in/imgres?q=loading+spinner&hl=en&SA=X&BIW=1366&BiH=588&TBM=isch&PRMD=imvns&TBN...

You can also try with another image GIF.

Please suggest if changes or improvements are possible in this for best performance

Thank you.

I had added this complete code so that someone can be useful in development. Thanks anyway.

Good day

Tags: BlackBerry Developers

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