带浮动按钮和listView的android ViewPager

尝试以下操作:

我们将在主活动中添加一个从片段调用的函数,该函数将隐藏/显示浮动操作按钮。

在主活动中

//Make FAB accessible on all function, declare it in MainActivity's class
FloatingActionButton fab;

public void fabShowHide(Boolean hide){
     if(hide)
         fab.hide();
     else
         fab.show();
}

在片段中,将onScrollListner附加到listview

代替 YourActivityClassName 对于主活动类名,这可能是 主要活动 ,检查主活动中类的名称

 listview.setOnScrollListener(new AbsListView.OnScrollListener() {
    @Override
    public void onScrollStateChanged(AbsListView view, int scrollState) {


    }

    @Override
    public void onScroll(AbsListView view, int firstVisibleItem, int visibleItemCount, int totalItemCount) {

        int lastItem = firstVisibleItem + visibleItemCount;
        if (lastItem == totalItemCount && firstVisibleItem > 0) {
        //Calling the function from main activity (hide)
            ((YourActivityClassName)getActivity()).fabShowHide(true);
        }
        else {
        //Calling the function from main activity (show)
            ((YourActivityClassName)getActivity()).fabShowHide(false);
        }
    }
});

主活动中的浮动操作按钮

(删除应用程序行为,您不需要它,我们通过编程创建了它)

<android.support.design.widget.FloatingActionButton
    android:id="@+id/fab"
    android:layout_width="wrap_content"
    android:layout_height="wrap_content"
    android:layout_gravity="bottom|end"
    android:layout_margin="@dimen/fab_margin"
    android:src="@android:drawable/ic_dialog_email" />

祝你好运:)

资料来源:

Call an activity method from a fragment

FloatingActionButton hide on list scroll