Question

很长的问题可能是一个简短的答案。

我有一系列图像（在网格视图中显示），当按下按钮时，我会使用 AnimationDrawable 类进行动画制作。
动画代码片段;

AnimationDrawable mAnimation;
view.setImageDrawable(null);

Random randomGenerator = new Random();
int rand = randomGenerator.nextInt(6);

BitmapDrawable frame0 = (BitmapDrawable)context.getResources().getDrawable(spinImages.get(0));
BitmapDrawable frame1 = (BitmapDrawable)context.getResources().getDrawable(spinImages.get(1));
BitmapDrawable last = (BitmapDrawable)context.getResources().getDrawable(endImages.get(rand));

mAnimation = new AnimationDrawable();
mAnimation.isOneShot();

for (int i=0; i < spinNumber; i++) {
    mAnimation.addFrame(frame0, spinDuration);
    mAnimation.addFrame(frame1, spinDuration);
}
mAnimation.addFrame(last, spinDuration);

view.setBackgroundDrawable(mAnimation);
view.setTag(rand);

mAnimation.start();

还有一个微调器会根据所选值过滤图像，将其中一些设置为不可见（所有这些都可以正常运行）。

public void onItemSelected(AdapterView<?> arg0, View arg1, int arg2, long arg3) {

    int index = arg0.getSelectedItemPosition();
    String[] filterOptions;
    filterOptions = getResources().getStringArray(R.array.spn_options);

    // hide all below filter value
    GridView gridView = (GridView) findViewById(R.id.grid_view);
    for (int i=0; i < ((ViewGroup)gridView).getChildCount(); ++i) {
        View nextChild = ((ViewGroup)gridView).getChildAt(i);
        nextChild.setVisibility(View.VISIBLE);
        if (nextChild instanceof ImageView) {
            // get tag
            if (Integer.parseInt(nextChild.getTag().toString()) < arg2) {
                nextChild.setVisibility(View.INVISIBLE);
            }
            nextChild.getTag();
        }
    }
}

问题是当选择显示所有的微调器时，我在图像上应用setVisibility(View.VISIBLE);这会使图像重新出现，但会再次激活动画。我希望图像重新出现，只显示动画的最终状态。

有什么想法吗？

Answer 1

我通过在使图像资源不可见之前设置图像资源来破解它。

public void onItemSelected(AdapterView<?> arg0, View arg1, int arg2, long arg3) {

    int index = arg0.getSelectedItemPosition();
    String[] filterOptions;
    filterOptions = getResources().getStringArray(R.array.spn_options);

    // hide all below filter value
    GridView gridView = (GridView) findViewById(R.id.grid_view);
    for (int i=0; i < ((ViewGroup)gridView).getChildCount(); ++i) {
        View nextChild = ((ViewGroup)gridView).getChildAt(i);
        nextChild.setVisibility(View.VISIBLE);
        if (nextChild instanceof ImageView) {
            // get tag
            if (Integer.parseInt(nextChild.getTag().toString()) < arg2) {
                ImageView iv = (ImageView) nextChild;
                iv.setImageResource(R.drawable.one);
                iv.setTag(nextChild.getTag().toString());
                iv.setVisibility(View.INVISIBLE);
            }
            nextChild.getTag();
        }
    }
}

仍然欢迎其他/更好的解决方案，

改变可见性时的Android动画

1 个答案: