XMLNS: app="http://schemas.android.com/apk/res-auto"
XMLNS: tools="http://schemas.android.com/tools"
Android: layout_width="match_parent"
Android: layout_height="match_parent"
Tools: context="MainActivity" & gt;Android: layout_width="match_parent"
Android: layout_height="match_parent"/& gt;Android: layout_width="wrap_content"
Android: layout_height="wrap_content"
Android: background="# d6d6d6" & gt;The android: id="@ + id/BTN"
Android: layout_width="wrap_content"
Android: layout_height="wrap_content"
Android: text="button"/& gt;
The android: id="@ + id/scroll_bottom"
Android: layout_width="match_parent"
Android: layout_height="match_parent"
Android: background="# FFFFFF"
App: behavior_hideable="true"
App: behavior_peekHeight="200 dp"
App: layout_behavior="@ string/bottom_sheet_behavior" & gt;The android: id="@ + id/ll_bottom"
Android: layout_width="match_parent"
Android: layout_height="wrap_content"
Android: orientation="vertical" & gt;Android: layout_width="wrap_content"
Android: layout_height="wrap_content"
Android: text="123"/& gt;Android: layout_width="wrap_content"
Android: layout_height="wrap_content"
Android: text="456"/& gt;
The activity set in the
NestedScrollView scroll_bottom=the findViewById (R.i d.s croll_bottom);
BottomSheetBehavior BottomSheetBehavior=BottomSheetBehavior. The from (scroll_bottom);
//the default hidden
BottomSheetBehavior. SetState (bottomSheetBehavior. STATE_HIDDEN);
The Button BTN=the findViewById (R.i db tn);
BTN. SetOnClickListener (new View. An OnClickListener () {
@ Override
Public void onClick (View View) {
If (bottomSheetBehavior getState ()==bottomSheetBehavior. STATE_HIDDEN) {
BottomSheetBehavior. SetState (bottomSheetBehavior. STATE_COLLAPSED);
}
}
});
Click on the button function is BottomSheetBehavior, if you don't use SurfaceView that, according to the normal if using the SurfaceView layout, then click on the button BottomSheetBehavior obscured,, every brother please give directions
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The bringToFront () method can make the control display in the upper,CodePudding user response: