我想创建底部工作表布局,当展开到全屏时应显示工具栏。我使用了以下代码,但即使没有扩展到全屏,它也会显示工具栏。
<?xml version="1.0" encoding="utf-8"?>
<android.support.design.widget.CoordinatorLayout
xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:app="http://schemas.android.com/apk/res-auto"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:layout_gravity="bottom"
app:layout_behavior="@string/bottom_sheet_behavior">
<include
android:id="@+id/search_tab_toolbar"
layout="@layout/search_tablayout"/>
<TextView
android:layout_width="match_parent"
android:layout_height="50dp"
android:id="@+id/search_tab_toolbar"
android:background="@color/accent"/>
<android.support.v7.widget.RecyclerView
android:id="@+id/recyclerView"
android:layout_width="match_parent"
android:layout_height="wrap_content"
/>
</android.support.design.widget.CoordinatorLayout>
答案 0 :(得分:0)
您可以使用setBottomSheetCallback
课程中的BottomSheetBehavior
。
最初将toobar的可见性设置为已消失。然后在您的代码中检测底部工作表的状态,
BottomSheetBehavior sheetBehavior = BottomSheetBehavior.from(layoutBottomSheet); //your bottom sheet layout
sheetBehavior.setBottomSheetCallback(new BottomSheetBehavior.BottomSheetCallback() {
@Override
public void onStateChanged(@NonNull View bottomSheet, int newState) {
switch (newState) {
case BottomSheetBehavior.STATE_HIDDEN:
break;
case BottomSheetBehavior.STATE_EXPANDED:
//make toolbar visible
toolbar.setVisibility(View.VISIBLE);
break;
case BottomSheetBehavior.STATE_COLLAPSED:
//hide toolbar here
toolbar.setVisibility(View.GONE);
break;
case BottomSheetBehavior.STATE_DRAGGING:
break;
case BottomSheetBehavior.STATE_SETTLING:
break;
}
}
@Override
public void onSlide(@NonNull View bottomSheet, float slideOffset) {
}
});
另外,避免在STATE_DRAGGING和STATE_SETTLING中执行操作。这些将被调用很多次,在这些情况下改变可见性可能会降低应用程序在低端设备上的性能。
答案 1 :(得分:0)
sheetBehavior.setBottomSheetCallback(new BottomSheetBehavior.BottomSheetCallback() {
@Override
public void onStateChanged(@NonNull View bottomSheet, int newState) {
switch (newState) {
case BottomSheetBehavior.STATE_HIDDEN:
break;
case BottomSheetBehavior.STATE_EXPANDED: {
//show toolbar
showToolBar(true);
break
}
break;
case BottomSheetBehavior.STATE_COLLAPSED: {
//hide toolbar
showToolBar(false);
break;
}
break;
case BottomSheetBehavior.STATE_DRAGGING:{
//hide toolbar
showToolBar(false);
break;}
case BottomSheetBehavior.STATE_SETTLING:{
showToolBar(false);
break;}
}
}
private void showToolBar(boolean show){
if(show)
appBarLayout.setExpanded(true, false);
else
appBarLayout.setExpanded(false, false);
}