RecyclerView實現的瀑布流效果

public class MainActivity extends AppCompatActivity {

    /**
     * 復用視圖的控件
     */
    private RecyclerView recyclerView;

    /**
     * 顯示的數據
     */
    private ArrayList<String> mDatas;

    /**
     * RecyclerView的適配器
     */
    private MyRecyclerViewAdapter adapter;

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);
        //1.找到控件
        recyclerView = (RecyclerView) findViewById(R.id.recyclerview);
        //2.聲名為瀑布流的布局方式: 3列,垂直方向
        StaggeredGridLayoutManager staggeredGridLayoutManager = new StaggeredGridLayoutManager(3,StaggeredGridLayoutManager.VERTICAL);
        //3.為recyclerView設置布局管理器
        recyclerView.setLayoutManager(staggeredGridLayoutManager);
        initData();//初始化數據
        //3.創建適配器
        adapter = new MyRecyclerViewAdapter(this, mDatas);
        //設置添加,移除item的動畫,DefaultItemAnimator為默認的
        recyclerView.setItemAnimator(new DefaultItemAnimator());
        //4.設置適配器
        recyclerView.setAdapter(adapter);

        //添加點擊事件
        adapter.setOnItemClickListener(new MyRecyclerViewAdapter.OnRecyclerItemClickListener() {
            @Override
            public void onItemClick(View view, int position) {
                //Toast.makeText(MainActivity.this,"單擊了:"+mDatas.get(position),Toast.LENGTH_SHORT).show();
                adapter.addItem(position,"添加的內容");
                Log.i("tag", "onItemClick: "+position);
                Log.i("tag", "集合: "+mDatas.toString());
            }
        });
        //設置長按事件
        adapter.setOnItemLongClickListener(new MyRecyclerViewAdapter.onRecyclerItemLongClickListener() {
            @Override
            public void onItemLongClick(View view, int position) {
                //Toast.makeText(MainActivity.this,"長按了:"+mDatas.get(position),Toast.LENGTH_SHORT).show();
                adapter.removeItem(position);
                Log.i("tag", "onItemLongClick: "+position);
                Log.i("tag", "集合: "+mDatas.toString());
            }
        });

    }

    //初始化數據
    protected void initData(){
        mDatas = new ArrayList<String>();
        for (int i = 'A'; i < 'z'; i++){
            mDatas.add("" + (char) i);
        }
    }

}