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这个问题是由于我们想加入的view已经存在parent导致,一般我们只需要调用((ViewGroup)view.getParent()).removeView(view)即可,可是有些时候并不能解决问题。这时候可以参考以下代码。
if (child.getParent() instanceof ViewGroup) {
ViewGroup parent = (ViewGroup) child.getParent();
LayoutTransition layoutTransition = null;
if (parent.getLayoutTransition() != null) {
layoutTransition = parent.getLayoutTransition();
parent.setLayoutTransition(null);
}
parent.removeView(child);
if (layoutTransition != null) {
parent.setLayoutTransition(layoutTransition);
}
if (child.getParent() != null) {
// LayoutTransition 将会造成removeView延迟,取消它
ViewGroupUtils.cancelLayoutTransition(parent);
// 假如view还是由于某些原因存在view
if (child.getParent() != null && FIELD_VIEW_PARENT != null) {
//通过反射直接把parent设为空
ReflectionUtils.setFieldValue(child, ReflectionUtils.getPrivateField(View.class, "mParent"), null);
}
}
//还存在parent,暂时放弃= =
if (child.getParent() != null) {
return;
}
}
public boolean cancelLayoutTransition(ViewGroup group) {
if (group != null) {
final LayoutTransition layoutTransition = group.getLayoutTransition();
if (layoutTransition != null && layoutTransition.isRunning() &&
METHOD_LAYOUT_TRANSITION_CANCEL != null) {
//由于cancel方法是@hide,所以需要反射调用
ReflectionUtils.invoke(group.getLayoutTransition(), null, ReflectionUtils.getPrivateMethod(LayoutTransition.class, "cancel"));
return true;
}
}
return false;
}