我正在使用带有 GridLayoutManager 的 RecyclerView 作为巴士票预订的布局。一切正常，但除了我坚持使用逻辑的地方，我必须使用这些逻辑在所有行中的 3 到 4 列项目之间留出更多间距。基本上我的布局应该如下面的截图所示。
我的要求：
电流输出：
我还发布了我的完整 RecyclerView GridLayoutManager 供您参考，如下所示
MultiSelectRecyclerViewAdapter.java
public class MultiSelectRecyclerViewAdapter extends SelectableAdapter<MultiSelectRecyclerViewAdapter.ViewHolder> {
private ArrayList<String> mArrayList;
private Context mContext;
private ViewHolder.ClickListener clickListener;
public MultiSelectRecyclerViewAdapter (Context context, ArrayList<String> arrayList,ViewHolder.ClickListener clickListener) {
this.mArrayList = arrayList;
this.mContext = context;
this.clickListener = clickListener;
}
// Create new views
@Override
public MultiSelectRecyclerViewAdapter.ViewHolder onCreateViewHolder(ViewGroup parent,
int viewType) {
View itemLayoutView = LayoutInflater.from(parent.getContext()).inflate(
R.layout.row_multiselect, null);
ViewHolder viewHolder = new ViewHolder(itemLayoutView,clickListener);
return viewHolder;
}
@Override
public void onBindViewHolder(ViewHolder viewHolder, int position) {
viewHolder.tvName.setText(mArrayList.get (position));
viewHolder.selectedOverlay.setVisibility(isSelected(position) ? View.VISIBLE : View.INVISIBLE);
}
@Override
public int getItemCount() {
return mArrayList.size();
}
public static class ViewHolder extends RecyclerView.ViewHolder implements View.OnClickListener,View.OnLongClickListener {
public TextView tvName;
private ClickListener listener;
private final View selectedOverlay;
public ViewHolder(View itemLayoutView,ClickListener listener) {
super(itemLayoutView);
this.listener = listener;
tvName = (TextView) itemLayoutView.findViewById(R.id.tvName);
selectedOverlay = (View) itemView.findViewById(R.id.selected_overlay);
itemLayoutView.setOnClickListener(this);
itemLayoutView.setOnLongClickListener (this);
}
@Override
public void onClick(View v) {
if (listener != null) {
listener.onItemClicked(getAdapterPosition ());
}
}
@Override
public boolean onLongClick (View view) {
if (listener != null) {
return listener.onItemLongClicked(getAdapterPosition ());
}
return false;
}
public interface ClickListener {
public void onItemClicked(int position);
public boolean onItemLongClicked(int position);
}
}
}
MultiSelectRecyclerViewActivity.java
public class MultiSelectRecyclerViewActivity extends AppCompatActivity implements MultiSelectRecyclerViewAdapter.ViewHolder.ClickListener {
private Toolbar toolbar;
private RecyclerView mRecyclerView;
private MultiSelectRecyclerViewAdapter mAdapter;
private RecyclerView.LayoutManager mLayoutManager;
private ArrayList<String> mArrayList = new ArrayList<String>();
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate (savedInstanceState);
setContentView(R.layout.activity_multiselect);
toolbar = (Toolbar) findViewById(R.id.toolbar);
for (int i = 1; i <= 48; i++) {
mArrayList.add ( ""+ i);
}
if (toolbar != null) {
setSupportActionBar(toolbar);
getSupportActionBar().setTitle("MultiSelectRecylcerView");
}
mRecyclerView = (RecyclerView) findViewById(R.id.my_recycler_view);
mRecyclerView.setHasFixedSize(true);
mRecyclerView.setLayoutManager(new GridLayoutManager (this,4));
mAdapter = new MultiSelectRecyclerViewAdapter (MultiSelectRecyclerViewActivity.this,mArrayList,this);
mRecyclerView.setAdapter (mAdapter);
}
@Override
public void onItemClicked (int position) {
toggleSelection(position);
}
@Override
public boolean onItemLongClicked (int position) {
toggleSelection(position);
return true;
}
private void toggleSelection(int position) {
mAdapter.toggleSelection (position);
}
}
我在编码中尝试过的内容：
我已经按照这个要点使用 ItemDecoration 为我的网格项目分配间距，如下所示。但不幸的是，我只能在所有项目之间平均分配间距。
mRecyclerView.setLayoutManager(new GridLayoutManager(context, NUM_COLUMNS);
ItemOffsetDecoration itemDecoration = new ItemOffsetDecoration(context, R.dimen.item_offset);
mRecyclerView.addItemDecoration(itemDecoration);
请帮助我解决我的案件的任何提示和解决方案。我完全不知道如何使用 RecyclerView 来处理这个要求和逻辑，我认为这应该是优化的方法。提前致谢。