Question

我是Android开发的新手，我在适配器中使用了两个Viewholder 一个用于照片（PHOTOVIEWHOLDER），另一个用于视频（VideoVIEWHOLDER）

我的问题是我拥有一个已通过一个视图保持器（Photoviewholder）的功能，我需要对我的（VideoViewholder）使用相同的功能。与其重复两次相同的功能，我还想我还有其他方法可以

  private void addNewlike(final PhotoHolder holder){
    Log.d(TAG, "addNewlike: adding new like ");
    String newLikeID = mReference.push().getKey();
    Likes likes = new Likes();
    likes.setUser_id(FirebaseAuth.getInstance().getCurrentUser().getUid());
    mReference.child(mContext.getString(R.string.dbname_photos))
            .child(holder.photo.getPhoto_id())
            .child(mContext.getString(R.string.field_likes))
            .child(newLikeID)
            .setValue(likes);
    mReference.child(mContext.getString(R.string.dbname_user_photos))
            .child(holder.photo.getUser_id())
            .child(holder.photo.getPhoto_id())
            .child(mContext.getString(R.string.field_likes))
            .child(newLikeID)
            .setValue(likes);
    holder.heart.toggleLike();
}


  private void addNewlike(final VideoViewHolder holder){
    Log.d(TAG, "addNewlike: adding new like ");
    String newLikeID = mReference.push().getKey();
    Likes likes = new Likes();
    likes.setUser_id(FirebaseAuth.getInstance().getCurrentUser().getUid());
    mReference.child(mContext.getString(R.string.dbname_photos))
            .child(holder.photo.getPhoto_id())
            .child(mContext.getString(R.string.field_likes))
            .child(newLikeID)
            .setValue(likes);
    mReference.child(mContext.getString(R.string.dbname_user_photos))
            .child(holder.photo.getUser_id())
            .child(holder.photo.getPhoto_id())
            .child(mContext.getString(R.string.field_likes))
            .child(newLikeID)
            .setValue(likes);
    holder.heart.toggleLike();
}





 public class GestureListener extends GestureDetector.SimpleOnGestureListener{

    PhotoHolder mHolder;
    public GestureListener(PhotoHolder holder) {
        mHolder = holder;
    }

    @Override
    public boolean onDown(MotionEvent e) {
        return true;
    }

    @Override
    public boolean onDoubleTap(MotionEvent e) {
        Log.d(TAG, "onDoubleTap: double tap detected.");

        Log.d(TAG, "onDoubleTap: clicked on photo: " + mHolder.photo.getPhoto_id());

         DatabaseReference reference = FirebaseDatabase.getInstance().getReference();
        Query query = reference
                .child(mContext.getString(R.string.dbname_photos))
                .child(mHolder.photo.getPhoto_id())
                .child(mContext.getString(R.string.field_likes));
        query.addListenerForSingleValueEvent(new ValueEventListener() {
            @Override
            public void onDataChange(DataSnapshot dataSnapshot) {
                for(DataSnapshot singleSnapshot : dataSnapshot.getChildren()){

                    String keyID = singleSnapshot.getKey();
                    //case1: Then user already liked the photo
                    if(mHolder.likephotobycurrentUser
                            && singleSnapshot.getValue(Likes.class).getUser_id()
                                    .equals(FirebaseAuth.getInstance().getCurrentUser().getUid())
                            ){
                        mReference.child(mContext.getString(R.string.dbname_photos))
                                .child(mHolder.photo.getPhoto_id())
                                .child(mContext.getString(R.string.field_likes))
                                .child(keyID)
                                .removeValue();
  ///                         mReference.child(mContext.getString(R.string.dbname_user_photos))
 //                                    .child(FirebaseAuth.getInstance().getCurrentUser().getUid())
                                .child(mHolder.photo.getUser_id())
                                .child(mHolder.photo.getPhoto_id())
                                .child(mContext.getString(R.string.field_likes))
                                .child(keyID)
                                .removeValue();


                        mHolder.heart.toggleLike();
                        getLikesString(mHolder);
                    }
                    //case2: The user has not liked the photo
                    else if(!mHolder.likephotobycurrentUser){
                        //add new like
                        addNewlike(mHolder);
                        break;
                    }
                }
                if(!dataSnapshot.exists()){
                    //add new like
                    addNewlike(mHolder);
                }
            }

            @Override
            public void onCancelled(DatabaseError databaseError) {

            }
        });

        return true;
    }
}

Answer 1

您可以创建一个接口，两个所有者都将实现该接口，并具有一个以该接口为参数的函数。

例如：

C:/Users/MinecraftMaster/Desktop/Python/Tests/monky.gif

那么您就是持有人：

logo = tk.PhotoImage(file ="C:/Users/MinecraftMaster/Desktop/Python/Tests/monky.gif")

最后是您的功能：

public interface MyInterface {
    Photo getPhoto(); // I assume your holder.photo returns a photo class here but feel free to replace by whatever is correct
    Heart getHeart();
}

它应该可以正常工作

Answer 2

定义类型MyBaseViewHolder的{{3}}，该类型声明在PhotoHolder和VideoViewHolder中发现的方法和属性。

将您的私有void addNewlike函数重构为

private void addNewlike(final MyBaseViewHolder holder)

并传递所需的任何ViewHolder。

点击链接以了解有关抽象类的更多信息，它们非常有用！

Answer 3

传递VideoViewHolder和PhotoHolder的基类

private void addNewlike(final BaseClass holder)

2具有一个Fuction（）的Viewholder？

3 个答案: