View.java
view.bringToFront(); // 将view提高到最顶层显示
/** * Change the view's z order in the tree, so it's on top of other sibling * views. This ordering change may affect layout, if the parent container * uses an order-dependent layout scheme (e.g., LinearLayout). Prior * to {@link android.os.Build.VERSION_CODES#KITKAT} this * method should be followed by calls to {@link #requestLayout()} and * {@link View#invalidate()} on the view's parent to force the parent to redraw * with the new child ordering. * * @see ViewGroup#bringChildToFront(View) */
public void bringToFront() {
if (mParent != null) {
mParent.bringChildToFront(this);
}
}