Вы можете расширить ButtonField :
package org.ci.blackberry.ui;
import net.rim.device.api.system.Bitmap;
import net.rim.device.api.ui.Graphics;
import net.rim.device.api.ui.component.ButtonField;
public class BitmapButtonField45 extends ButtonField {
private static final int STATE_NORMAL = 0;
private static final int STATE_FOCUS = 1;
private static final int STATE_ACTIVE = 2;
Bitmap mNormal;
Bitmap mFocused;
Bitmap mActive;
int mWidth;
int mHeight;
private int mState = STATE_NORMAL;
public BitmapButtonField45(Bitmap normal, Bitmap focused,
Bitmap active) {
super(CONSUME_CLICK);
mNormal = normal;
mFocused = focused;
mActive = active;
mWidth = mNormal.getWidth();
mHeight = mNormal.getHeight();
}
public BitmapButtonField45(Bitmap normal, Bitmap focused) {
this(normal, focused, focused);
}
protected void paint(Graphics graphics) {
Bitmap bitmap = null;
switch (getState()) {
case STATE_NORMAL:
bitmap = mNormal;
break;
case STATE_FOCUS:
bitmap = mFocused;
break;
case STATE_ACTIVE:
bitmap = mActive;
break;
default:
bitmap = mNormal;
}
graphics.drawBitmap(0, 0, bitmap.getWidth(), bitmap.getHeight(),
bitmap, 0, 0);
}
public int getState() {
return mState;
}
protected void applyTheme()
{}
protected void onFocus(int direction) {
mState = STATE_FOCUS;
super.onFocus(direction);
}
protected void onUnfocus() {
mState = STATE_NORMAL;
super.onUnfocus();
}
protected boolean navigationClick(int status, int time) {
mState = STATE_ACTIVE;
return super.navigationClick(status, time);
}
protected boolean navigationUnclick(int status, int time) {
mState = STATE_NORMAL;
return super.navigationUnclick(status, time);
}
public int getPreferredWidth() {
return mWidth;
}
public int getPreferredHeight() {
return mHeight;
}
protected void layout(int width, int height) {
setExtent(getPreferredWidth(), getPreferredHeight());
}
}
Примеры использования: PuzzleApp.java