這裡要實現的是RecyclerView的item的長按事件與Menu關聯
先看看要寫的效果：

1、在res下新建menu目錄，在menu目錄下新建recyclerview_menu.xml檔案：

<?xml version="1.0" encoding="utf-8"?>
<menu xmlns:android="http://schemas.android.com/apk/res/android"
      xmlns:app="http://schemas.android.com/apk/res-auto">
    <item
        android:id
 
="@+id/item_add"
        android:title="新增"
        android:orderInCategory="1"
        app:showAsAction="never"/>
    <item
        android:id="@+id/item_modify"
        android:title="修改"
        android:orderInCategory="2"
        app:showAsAction="never"/>
    <item
        android:id="@+id/item_delete"
 

        android:title="刪除"
        android:orderInCategory="3"
        app:showAsAction="never"/>
    <item
        android:id="@+id/item_more"
        android:title="更多"
        android:orderInCategory="4"
        app:showAsAction="never"/>
</menu>

2、關鍵程式碼：

public class DrawerLayoutActivity
 
 extends AppCompatActivity {

    private Bomb[] mBombArray = {
            new Bomb("bomb5", R.drawable.bomb5), new Bomb("bomb6", R.drawable.bomb6), new Bomb("bomb7", R.drawable.bomb7),
            new Bomb("bomb8", R.drawable.bomb8), new Bomb("bomb9", R.drawable.bomb9), new Bomb("bomb10", R.drawable.bomb10),
            new Bomb("bomb11", R.drawable.bomb11), new Bomb("bomb12", R.drawable.bomb12), new Bomb("bomb13", R.drawable.bomb13),
            new Bomb("bomb14", R.drawable.bomb14), new Bomb("bomb15", R.drawable.bomb15), new Bomb("bomb16", R.drawable.bomb16)
    };
    private List<Bomb> mBombList = new ArrayList<>();
    private CommonAdapter<Bomb> mAdapter;
    private RecyclerView mRecyclerView;

    private int mSelectPosition;

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_drawer_layout);

        initRecyclerView();
    }

    private void initRecyclerView() {
        mAdapter = new CommonAdapter<Bomb>(this,R.layout.item,mBombList) {
            @Override
            protected void convert(ViewHolder holder, Bomb bomb, final int position) {
                holder.setText(R.id.tv,bomb.name);
                //holder.setImageResource(R.id.iv,bomb.imgId);
                ImageView iv = (ImageView) holder.getConvertView().findViewById(R.id.iv);
                Glide.with(DrawerLayoutActivity.this).load(bomb.imgId).into(iv);

                //長按事件
                holder.getConvertView().setOnLongClickListener(new View.OnLongClickListener() {
                    @Override
                    public boolean onLongClick(View v) {
                        mSelectPosition = position;
                        return false;
                    }
                });
            }
        };
        mRecyclerView = (RecyclerView) findViewById(R.id.revyvlerview);
        mRecyclerView.setLayoutManager(new GridLayoutManager(this,2));
        mRecyclerView.setAdapter(mAdapter);

        //為RecyclerView註冊ContextMenu
        registerForContextMenu(mRecyclerView);
    }

    /**
     * 以下與 RecyclerView 的 menu 相關
     */
    @Override
    public void onCreateContextMenu(ContextMenu menu, View v, ContextMenu.ContextMenuInfo menuInfo) {
        super.onCreateContextMenu(menu, v, menuInfo);
        MenuInflater inflater = getMenuInflater();
        inflater.inflate(R.menu.recyclerview_menu,menu);
    }

    @Override
    public boolean onContextItemSelected(MenuItem item) {
        switch (item.getItemId()){
            case R.id.item_add:
                Toast.makeText(this, "add", Toast.LENGTH_SHORT).show();
                return true;
            case R.id.item_modify:
                Toast.makeText(this, "modify", Toast.LENGTH_SHORT).show();
                return true;
            case R.id.item_delete:
                Toast.makeText(this, "delete", Toast.LENGTH_SHORT).show();
                mBombList.remove(mSelectPosition);
                mAdapter.notifyDataSetChanged();
                return true;
            case R.id.item_more:
                Toast.makeText(this, "more", Toast.LENGTH_SHORT).show();
                return true;
            default:
                return super.onContextItemSelected(item);
        }

    }
}