I'm trying to create a simple on a black background view with 2 (maybe
3) clickable images which toggle between 2 graphics each depending on
whether they are clicked or not. My code is below, I have the
following issues:
1) Using "StateListDrawable", I can get the buttons to change state
when user navigates up/down, but they do not seem to respond to touch
screen events (standard Button and ImageButtons do).
2) I haven't figured out yet how to handle button click events (but
ignore navigating from one to the other by up/down key presses)
3) The background is not all black
4) I want the buttons to be centered vertically, currently the first
one is right at the top of the screen.
class CustomImageButton extends Button { // View { //ImageButton {
public CustomImageButton(Context context, Bitmap imgSelected, Bitmap
imgInactive ) {
super(context);
Drawable dSelected = new BitmapDrawable(imgSelected);
Drawable dInactive = new BitmapDrawable(imgInactive);
StateListDrawable images = new StateListDrawable();
images.addState(Button.ENABLED_FOCUSED_STATE_SET, dSelected);
//images.addState(Button.PRESSED_SELECTED_STATE_SET, dSelected);
images.addState(Button.PRESSED_ENABLED_SELECTED_STATE_SET,
dSelected);
images.addState(Button.EMPTY_STATE_SET, dInactive);
setBackgroundDrawable( images );
this.setWidth( imgSelected.getWidth() );
this.setHeight( imgSelected.getHeight() );
//setBackgroundColor(0);
//this.setFocusableInTouchMode(true);
}
}
class MyCanvas extends LinearLayout {
public MyCanvas(Context context) { //throws IOException {
super(context);
this.setOrientation(VERTICAL);
setBackgroundColor(0);
Bitmap image =
BitmapFactory.decodeResource(context.getResources(),
R.drawable.combinedImages);
int width = image.getWidth() / 3;
int height = image.getHeight();
splash = Bitmap.createBitmap( image, image.getWidth()-width, 0,
width, height );
height >>= 1;
View button1 = new CustomImageButton(context, true,
Bitmap.createBitmap( image, 0, 0, width, height
),
Bitmap.createBitmap( image, width, 0, width,
height ) );
addView( button1 );
View button2 = new CustomImageButton(context, false,
Bitmap.createBitmap( image, width, height,
width, height ),
Bitmap.createBitmap( image, 0, height, width,
height ) );
addView( button2 );
}
}
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