Android 如何确保进度条已停止

我知道要“停止”ProgressBar，需要将其可见性设置为

View.GONE

。但是这真的能阻止它吗？背景中有一个动画，可以为视图设置动画。该动画是否在检测到进度条已消失后停止或不可见？我真的不想在不需要的时候让进度条在后台持续运行。这是对处理能力的浪费

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有人知道吗？

看着

ProgressBar.java

我发现：

/**
 * Returns whether the ProgressBar is animating or not. This is essentially the same
 * as whether the ProgressBar is {@link #isIndeterminate() indeterminate} and visible,
 * as indeterminate ProgressBars are always animating, and non-indeterminate
 * ProgressBars are not animating.
 *
 * @return true if the ProgressBar is animating, false otherwise.
 */
public boolean isAnimating() {
    return isIndeterminate() && getWindowVisibility() == VISIBLE && isShown();
}

void startAnimation() {
    if (getVisibility() != VISIBLE || getWindowVisibility() != VISIBLE) {
        return;
    }
    ...


@Override
protected void onDetachedFromWindow() {
    if (mIndeterminate) {
        stopAnimation();
    }
    ...

我认为，

ProgressBar

将在隐藏后停止动画