这很容易表现出一个领域内的一些动画 - BitmapField或屏幕：
[黑莓 - 背景图像/动画RIM OS 4.5.0] [1]
但是，如果你需要的移动领域 ，而不仅仅是图像？
可能用过了：
- 游戏工作流功能，如象棋，拼图等
- 应用用户定义的布局，比如在谷歌小工具
- 增强GUI动画效果
所以，我想兑换这个任务我的expirience，在另一方面，我想知道任何人的可能性和建议。
Answer 1:
这个效果可以用自定义布局很容易achived：
class AnimatedManager extends Manager {
int ANIMATION_NONE = 0;
int ANIMATION_CROSS_FLY = 1;
boolean mAnimationStart = false;
Bitmap mBmpBNormal = Bitmap.getBitmapResource("blue_normal.png");
Bitmap mBmpBFocused = Bitmap.getBitmapResource("blue_focused.png");
Bitmap mBmpRNormal = Bitmap.getBitmapResource("red_normal.png");
Bitmap mBmpRFocused = Bitmap.getBitmapResource("red_focused.png");
Bitmap mBmpYNormal = Bitmap.getBitmapResource("yellow_normal.png");
Bitmap mBmpYFocused = Bitmap.getBitmapResource("yellow_focused.png");
Bitmap mBmpGNormal = Bitmap.getBitmapResource("green_normal.png");
Bitmap mBmpGFocused = Bitmap.getBitmapResource("green_focused.png");
int[] width = null;
int[] height = null;
int[] xPos = null;
int[] yPos = null;
BitmapButtonField mBButton = new BitmapButtonField(mBmpBNormal,
mBmpBFocused);
BitmapButtonField mRButton = new BitmapButtonField(mBmpRNormal,
mBmpRFocused);
BitmapButtonField mYButton = new BitmapButtonField(mBmpYNormal,
mBmpYFocused);
BitmapButtonField mGButton = new BitmapButtonField(mBmpGNormal,
mBmpGFocused);
public AnimatedManager() {
super(USE_ALL_HEIGHT | USE_ALL_WIDTH);
add(mBButton);
add(mRButton);
add(mYButton);
add(mGButton);
width = new int[] { mBButton.getPreferredWidth(),
mRButton.getPreferredWidth(),
mYButton.getPreferredWidth(),
mGButton.getPreferredWidth() };
height = new int[] { mBButton.getPreferredHeight(),
mRButton.getPreferredHeight(),
mYButton.getPreferredHeight(),
mGButton.getPreferredHeight() };
xPos = new int[] { 0, getPreferredWidth() - width[1], 0,
getPreferredWidth() - width[3] };
yPos = new int[] { 0, 0, getPreferredHeight() - height[2],
getPreferredHeight() - height[3] };
Timer timer = new Timer();
timer.schedule(mAnimationTask, 0, 100);
}
TimerTask mAnimationTask = new TimerTask() {
public void run() {
UiApplication.getUiApplication().invokeLater(new Runnable() {
public void run() {
updateLayout();
};
});
};
};
MenuItem mAnimationMenuItem = new MenuItem("Start", 0, 0) {
public void run() {
mAnimationStart = true;
};
};
protected void makeMenu(Menu menu, int instance) {
super.makeMenu(menu, instance);
menu.add(mAnimationMenuItem);
}
public int getPreferredHeight() {
return Display.getHeight();
}
public int getPreferredWidth() {
return Display.getWidth();
}
protected void sublayout(int width, int height) {
width = getPreferredWidth();
height = getPreferredHeight();
if (getFieldCount() > 3) {
Field first = getField(0);
Field second = getField(1);
Field third = getField(2);
Field fourth = getField(3);
layoutChild(first, this.width[0], this.height[0]);
layoutChild(second, this.width[1], this.height[1]);
layoutChild(third, this.width[2], this.height[2]);
layoutChild(fourth, this.width[3], this.height[3]);
if (mAnimationStart) {
boolean anim1 = performLayoutAnimation(0,
width - this.width[0],
height - this.height[0]);
boolean anim2 = performLayoutAnimation(1, 0,
height - this.height[1]);
boolean anim3 = performLayoutAnimation(2,
width - this.width[2], 0);
boolean anim4 = performLayoutAnimation(3, 0, 0);
mAnimationStart = anim1 || anim2 || anim3 || anim4;
}
setPositionChild(first, xPos[0], yPos[0]);
setPositionChild(second, xPos[1], yPos[1]);
setPositionChild(third, xPos[2], yPos[2]);
setPositionChild(fourth, xPos[3], yPos[3]);
}
setExtent(width, height);
}
boolean performLayoutAnimation(int fieldIndex, int x, int y) {
boolean result = false;
if (xPos[fieldIndex] > x) {
xPos[fieldIndex] -= 2;
result = true;
} else if (xPos[fieldIndex] < x) {
xPos[fieldIndex] += 2;
result = true;
}
if (yPos[fieldIndex] > y) {
yPos[fieldIndex] -= 1;
result = true;
} else if (yPos[fieldIndex] < y) {
yPos[fieldIndex] += 1;
result = true;
}
return result;
}
}
BitmapButtonField类我使用：
class BitmapButtonField extends ButtonField {
Bitmap mNormal;
Bitmap mFocused;
int mWidth;
int mHeight;
public BitmapButtonField(Bitmap normal, Bitmap focused) {
super(CONSUME_CLICK);
mNormal = normal;
mFocused = focused;
mWidth = mNormal.getWidth();
mHeight = mNormal.getHeight();
setMargin(0, 0, 0, 0);
setPadding(0, 0, 0, 0);
setBorder(BorderFactory.createSimpleBorder(new XYEdges(0, 0, 0, 0)));
setBorder(VISUAL_STATE_ACTIVE, BorderFactory
.createSimpleBorder(new XYEdges(0, 0, 0, 0)));
}
protected void paint(Graphics graphics) {
Bitmap bitmap = null;
switch (getVisualState()) {
case VISUAL_STATE_NORMAL:
bitmap = mNormal;
break;
case VISUAL_STATE_FOCUS:
bitmap = mFocused;
break;
case VISUAL_STATE_ACTIVE:
bitmap = mFocused;
break;
default:
bitmap = mNormal;
}
graphics.drawBitmap(0, 0, bitmap.getWidth(), bitmap.getHeight(),
bitmap, 0, 0);
}
public int getPreferredWidth() {
return mWidth;
}
public int getPreferredHeight() {
return mHeight;
}
protected void layout(int width, int height) {
setExtent(mWidth, mHeight);
}
protected void applyTheme(Graphics arg0, boolean arg1) {
}
}
文章来源: Blackberry - fields layout animation
