[Android Pro] 超能RecyclerView组件使用
RecyclerView最强大的功能在于秒变功能，只需要改动很少的代码就可以实现ListView，GridView及水平ListViw的切换功能
public class MainActivity extends ActionBarActivity { private RecyclerView mRecyclerView; private List mDatas; private TestAdapter mAdapter; @Override protected void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); setContentView(R.layout.activity_main); initDatas(); initViews(); } private void initDatas() { mDatas=new ArrayList(); TestData data=new TestData(); for (int i = 'A'; i < 'z'; i++) { data.setTitle(Title+(char)i); data.setContent(Content+(char)i); mDatas.add(data); } } private void initViews() { mRecyclerView=(RecyclerView) findViewById(R.id.test_rcv); mAdapter=new TestAdapter(this, mDatas); mRecyclerView.setAdapter(mAdapter); /************水平ListView效果****************************************/ LinearLayoutManager ll=new LinearLayoutManager(this, LinearLayoutManager.HORIZONTAL, true); mRecyclerView.setLayoutManager(ll); /************垂直ListView效果****************************************/ LinearLayoutManager ll=new LinearLayoutManager(this, LinearLayoutManager.VERTICAL, true);//实现ListView效果 mRecyclerView.setLayoutManager(ll); /************水平滚动的GridView效果****************************************/ StaggeredGridLayoutManager ll=new StaggeredGridLayoutManager(5, StaggeredGridLayoutManager.HORIZONTAL);//水平GridView效果，5列展示 mRecyclerView.setLayoutManager(ll); /************GridView效果****************************************/ GridLayoutManager ll=new GridLayoutManager(this, 4);//4列展示 mRecyclerView.setLayoutManager(ll); } }
下面就是实现瀑布流操作，主要改的就是我们的适配器，要在适配器中动态计算item的高度
public class WaterFlowAdapter extends Adapter { private Context mContext; private List mDatas; private List heightArray; public WaterFlowAdapter(Context mContext, List mDatas) { this.mContext = mContext; this.mDatas = mDatas; heightArray=new ArrayList(); for (int i = 0; i < mDatas.size(); i++) { heightArray.add((int)(100+Math.random()*300)); } } @Override public WaterFlowAdapter.TestViewHolder onCreateViewHolder(ViewGroup paramViewGroup, int paramInt) { View v = LayoutInflater.from(mContext).inflate(R.layout.lv_item, null); wrong
View v = LayoutInflater.from(mContext).inflate(R.layout.lv_item,paramViewGroup,false); right TestViewHolder holder = new WaterFlowAdapter.TestViewHolder(v); return holder; } @Override public void onBindViewHolder(WaterFlowAdapter.TestViewHolder paramVH, int paramInt) { LayoutParams lp=paramVH.itemView.getLayoutParams(); lp.height=heightArray.get(paramInt); paramVH.itemView.setLayoutParams(lp); paramVH.titleTv.setText(mDatas.get(paramInt).getTitle()); paramVH.contentTv.setText(mDatas.get(paramInt).getContent()); } @Override public int getItemCount() { // TODO Auto-generated method stub return mDatas.size(); } class TestViewHolder extends ViewHolder { ImageView iconIv; TextView titleTv; TextView contentTv; public TestViewHolder(View holder) { super(holder); iconIv = (ImageView) holder.findViewById(R.id.item_iv); titleTv = (TextView) holder.findViewById(R.id.item_title); contentTv = (TextView) holder.findViewById(R.id.item_content); } } }
最后在Activity中：
mAdapter=new WaterFlowAdapter(this, mDatas); mRecyclerView.setAdapter(mAdapter); StaggeredGridLayoutManager ll=new StaggeredGridLayoutManager(4, StaggeredGridLayoutManager.VERTICAL);//水平GridView效果，5列展示 mRecyclerView.setLayoutManager(ll);
分类:
Android Pro
本文转自demoblog博客园博客，原文链接http://www.cnblogs.com/0616--ataozhijia/p/4827416.html如需转载请自行联系原作者
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