PopupMenu click causing RecyclerView to scroll

问题:

I have an overflow button inside a CardView in Recyclerview. Whenever I am clicking the button,I show a popup menu but also RecyclerView is scrolling down one item. Can anyone please help me stop this unwanted scrolling?

Basically I am trying to replicate the same overflow button behavior as in Playstore.

Layout:

<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android" android:layout_width="match_parent" android:layout_height="match_parent" android:layout_margin="5dp">  <android.support.v7.widget.CardView     android:id="@+id/cv_tracks"     android:layout_width="match_parent"     android:layout_height="65dp"     >      <RelativeLayout         android:layout_width="match_parent"         android:layout_height="60dp">          <ImageView             android:id="@+id/ivTracks"             android:layout_width="60dp"             android:layout_height="60dp"             android:background="@drawable/unknown"            />         <Button             android:id="@+id/imgbtn_overflow"             android:layout_width="wrap_content"             android:layout_height="wrap_content"             android:background="@android:color/transparent"             android:drawableTop="@drawable/ic_overflow"             android:paddingLeft="25dp"             android:paddingRight="20dp"             android:layout_alignParentTop="true"             android:layout_centerHorizontal="true" />   </RelativeLayout>  </android.support.v7.widget.CardView>  </RelativeLayout> 

Adapter:

@Override public void onBindViewHolder(final TracksViewHolder tracksViewHolder, int i) {      tracksViewHolder.imgBtnOverflow.setTag(i);     tracksViewHolder.imgBtnOverflow.setOnClickListener(new View.OnClickListener() {         @Override         public void onClick(View v) {             //Creating the instance of PopupMenu             final int position = (Integer) v.getTag();              PopupMenu popup = new PopupMenu(mContext,tracksViewHolder.imgBtnOverflow);              //Inflating the Popup using xml file             popup.getMenuInflater()                     .inflate(R.menu.popup_menu_overflow, popup.getMenu());               //registering popup with OnMenuItemClickListener             popup.setOnMenuItemClickListener(new PopupMenu.OnMenuItemClickListener() {                  public boolean onMenuItemClick(MenuItem item) {                   if(mPopUpClick!=null)                      mPopUpClick.actionOnPopUpItemClick(position,item,songs.get(position));                     return true;                 }             });              popup.show(); //showing popup menu         }     });  } 

UPDATE: Got the issue .When the popup menu displays,it slides the list down so as to display the whole dropdown. How to adjust popup to display up/down depending on the space available?

回答1:

Tried using android.widget.PopupMenu instead of android.support.v7.widget.PopupMenu and Voila, it works. So is it a bug in Support library. Can great developers out here confirm the same?

回答2:

You can have your AnchorView override requestRectangleOnScreen() and return false. This will prevent any parent ScrollView from scrolling.

So, in your case, imgBtnOverflow would be a custom ImageButton, like so:

/**  * A custom {@link ImageButton} which prevents parent ScrollView scrolling when used as the  * anchor for a {@link android.support.v7.widget.PopupMenu}  */ public class NonScrollImageButton extends ImageButton {      public NonScrollImageButton(Context context, AttributeSet attrs) {         super(context, attrs);     }      @Override     public boolean requestRectangleOnScreen(Rect rectangle, boolean immediate) {         return false;     } } 

Props to jankovd (https://gist.github.com/jankovd/19ef35efd1f00e9213fa)

An issue has been filed against the Support PopupMenu here: https://code.google.com/p/android/issues/detail?id=135439

回答3:

I have same problem, and I use this way:

mLayoutManager = new LinearLayoutManager(getContext(), LinearLayoutManager.HORIZONTAL, false) {             @Override             public boolean requestChildRectangleOnScreen(RecyclerView parent, View child, Rect rect, boolean immediate) {                 return false;             }         }; mRecyclerView.setLayoutManager(mLayoutManager); 

RecyclerView user layoutmanager to manage layout, so I think change layoutmanger behaver is the bettor solution.

回答4:

requestRectangleOnScreennot work for me, in my case, requestRectangleOnScreennot called, when show popupMenu. my solution is override requestChildRectangleOnScreen, and reture false, work well.

public class PopupAncorRecyclerViewPager extends RecyclerView {         @Override     public boolean requestChildRectangleOnScreen(View child, Rect rect, boolean immediate) {         return false;     } } 

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