Android图像移动动画问题
我使用以下代码对图像进行动画处理，它工作正常，但是在对图像进行动画处理时，图像看起来很少跳跃，而不是平滑移动。（它看起来像移动，但不太平滑。它在中间停止了一段时间）任何人都可以在代码中找到问题吗？
class AnimationLoop implements Runnable
{
public void run()
{
while(true)
{
while(running)
{
try
{
Thread.sleep(30);
}
catch(InterruptedException ex) {}
}
}
counter+=1;
updatePosition(0);
main.postInvalidate(); //main is type panel
}
private synchronized void updatePosition(int index) {
mYPositions[index]-=2; // animate from bottom to top
mXPositions[index]-=2;
}
@Override
protected void onDraw(Canvas canvas)
{
canvas.drawBitmap(balloonSet.get(0), mXPositions[0], mYPositions[0],null);
}
i used following code to animate a image it works fine but while animating the image looks little jumping rather than smooth moving.(It looks like moving but not quite smooth. it stops a while in between) Can Any one find the problem in code?
class AnimationLoop implements Runnable
{
public void run()
{
while(true)
{
while(running)
{
try
{
Thread.sleep(30);
}
catch(InterruptedException ex) {}
}
}
counter+=1;
updatePosition(0);
main.postInvalidate(); //main is type panel
}
private synchronized void updatePosition(int index) {
mYPositions[index]-=2; // animate from bottom to top
mXPositions[index]-=2;
}
@Override
protected void onDraw(Canvas canvas)
{
canvas.drawBitmap(balloonSet.get(0), mXPositions[0], mYPositions[0],null);
}
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动画的平滑度取决于坐标的变化以及它在单个坐标处停留的时间。如果您想以相同的速度移动动画但更平滑一点，则按相同的比例减少时间和单位变化。
例如：您的案例减少了 50%。这将使 x 和 y 位置减 1，休眠时间为 15ms。
这可能有助于如何制作动画位图
The smoothness of your animation will depend on the change in coordinates and the time it stays at a single coordinate. If you want to move the animation at same speed but a little smooother, then reduce the time and unit change by same ratio.
For example: Your case reduce by 50%. That will make x and y position to be deducted by 1 and the sleep time will be 15ms.
This might help how to animate bitmaps