RecyclerView的GridLayoutManager - 交替1個2列行

Question

我想在第一行1個圖像和第二排2個圖像和重複等..
我想recyclerview是這樣

Answer 1

你應該這樣做：

mRecyclerView = (RecyclerView) view.findViewById(R.id.grid); 
mLayoutManager = new GridLayoutManager(getActivity(), 2); 
mLayoutManager.setSpanSizeLookup(new GridLayoutManager.SpanSizeLookup() { 
     @Override 
     public int getSpanSize(int position) { 
      switch(mAdapter.getItemViewType(position)){ 
       case MyAdapter.TYPE_HEADER: 
        return 2; 
       case MyAdapter.TYPE_ITEM: 
        return 1; 
       default: 
        return -1; 
      } 
     } 
    }); 

mRecyclerView.setLayoutManager(mLayoutManager); 

，並設置您項目的類型，作爲頭或項目在適配器

Answer 2

RecyclerView mRecyclerView = 
    (RecyclerView) findViewById(R.id.recycler_view); 
YourAdapter yourAdapter = new YourAdapter(this, arrayList); 
if (mRecyclerView != null) { 
    mRecyclerView.setLayoutManager(new GridLayoutManager(this, 4)); 
    mRecyclerView.setAdapter(yourAdapter); 
} 

Answer 3

GridLayoutManager layout_manager = new GridLayoutManager(mContext, 2); 
     manager.setSpanSizeLookup(new GridLayoutManager.SpanSizeLookup() { 
      @Override 
      public int getSpanSize(int position) { 
       return (position % 3 == 0 ? 2 : 1); 
      } 
     }); 

/* Custom Adapter */ 

     Adapter contact_adapter = new Adapter(MainActivity.this, all_contacts_list); 
     recyclerView.setLayoutManager(layout_manager); 
     recyclerView.setHasFixedSize(true); 
     recyclerView.setAdapter(contact_adapter);