有时候需要检测视图是否同名,可以使用下面的方法.
private static boolean viewIsOpaque(View v) {
if (v.isOpaque()) {
return true;
}
// View#isOpaque didn't take all valid opaque scrollbar modes into account
// before API 18 (JB-MR2). On newer devices rely solely on isOpaque above and return false
// here. On older devices, check the view's background drawable directly as a fallback.
if (Build.VERSION.SDK_INT >= 18) {
return false;
}
final Drawable bg = v.getBackground();
if (bg != null) {
return bg.getOpacity() == PixelFormat.OPAQUE;
}
return false;
}
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