Android 安卓:滚动到最后时如何隐藏按钮
我在屏幕的顶部有scrollview布局,底部有按钮。我想在向下滚动时隐藏此按钮,并在到达滚动视图末尾时显示它。我怎么能意识到这一点 红色-Android 安卓:滚动到最后时如何隐藏按钮,android,layout,android-coordinatorlayout,Android,Layout,Android Coordinatorlayout,我在屏幕的顶部有scrollview布局,底部有按钮。我想在向下滚动时隐藏此按钮,并在到达滚动视图末尾时显示它。我怎么能意识到这一点 红色-按钮,滚动视图-蓝色。 试试这个 main_layout.xml <?xml version="1.0" encoding="utf-8"?> <android.support.design.widget.CoordinatorLayout xmlns:android="http://schemas.android.com/apk/res/
按钮
,滚动视图
-蓝色。
试试这个
main_layout.xml
<?xml version="1.0" encoding="utf-8"?>
<android.support.design.widget.CoordinatorLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="match_parent"
android:layout_height="match_parent">
<android.support.v7.widget.RecyclerView
android:id="@+id/recycler_view"
android:layout_width="match_parent"
android:layout_height="match_parent" />
<Button
android:id="@+id/submit"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:layout_gravity="bottom"
android:text="Submit" />
</android.support.design.widget.CoordinatorLayout>
在活动类中
RecyclerView mRecyclerView = findViewById(R.id.recycler_view);
Button mSubmit = findViewById(R.id.submit);
mRecyclerView .addOnScrollListener(new RecyclerView.OnScrollListener() {
@Override
public void onScrolled(RecyclerView recyclerView, int dx, int dy) {
//dx horizontal distance scrolled in pixels
//dy vertical distance scrolled in pixels
super.onScrolled(recyclerView, dx, dy);
if (dy > 0 && mSubmit.getVisibility() == View.VISIBLE) {
mSubmit.setVisibility(View.GONE);
} else if (dy < 0 && mSubmit.getVisibility() != View.VISIBLE) {
mSubmit.setVisibility(View.VISIBLE);
}
}
});
RecyclerView mRecyclerView=findViewById(R.id.recycler\u视图);
按钮mSubmit=findviewbyd(R.id.submit);
mrecycleView.addOnScrollListener(新的RecycleView.OnScrollListener(){
@凌驾
已填空的公共空间(RecyclerView RecyclerView、int dx、int dy){
//dx水平距离以像素为单位滚动
//dy垂直距离以像素为单位滚动
super.onScrolled(recyclerView、dx、dy);
if(dy>0&&mSubmit.getVisibility()==View.VISIBLE){
mSubmit.setVisibility(View.GONE);
}else if(dy<0&&mSubmit.getVisibility()!=View.VISIBLE){
mSubmit.setVisibility(View.VISIBLE);
}
}
});
在此处添加代码是滚动视图
还是列表/回收视图
?如果不展示你的尝试,回答你就不容易了。