RecyclerView 实现瀑布流及点击事件

2019-11-09 17:28:00

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来源：转载

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public class FruitAdapter extends RecyclerView.Adapter<FruitAdapter.ViewHolder> { PRivate List<Fruit> mFruitList; /** *自定义内部类，构造传入条目view */ static class ViewHolder extends RecyclerView.ViewHolder{ ImageView fruitImage; TextView fruitName; View fruitView; public ViewHolder(View itemView) { super(itemView); fruitView=itemView; fruitImage= (ImageView) itemView.findViewById(R.id.fruit_image); fruitName= (TextView) itemView.findViewById(R.id.fruit_name); } } //Adapter的构造传入数组 public FruitAdapter(List<Fruit> mFruitList) { this.mFruitList = mFruitList; } //传入布局，绑定布局 @Override public ViewHolder onCreateViewHolder(ViewGroup parent, int viewType) { View view= LayoutInflater.from(parent.getContext()).inflate(R.layout.fruit_item,parent,false); final ViewHolder holder=new ViewHolder(view); holder.fruitView.setOnClickListener(new View.OnClickListener() { @Override public void onClick(View view) { int position=holder.getAdapterPosition(); Fruit fruit=mFruitList.get(position); Toast.makeText(view.getContext(),"你想吃"+fruit.getName()+"的水果",Toast.LENGTH_SHORT).show(); } }); holder.fruitImage.setOnClickListener(new View.OnClickListener() { @Override public void onClick(View view) { int position=holder.getAdapterPosition(); Fruit fruit=mFruitList.get(position); Toast.makeText(view.getContext(),"你想吃图片的"+fruit.getName(),Toast.LENGTH_SHORT).show(); } }); return holder; } //绑定数据 @Override public void onBindViewHolder(ViewHolder holder, int position) { Fruit fruit=mFruitList.get(position); holder.fruitImage.setImageResource(fruit.getImageId()); holder.fruitName.setText(fruit.getName()); } @Override public int getItemCount() { return mFruitList.size(); }}

MainActivity的内容

public class MainActivity extends AppCompatActivity implements View.OnClickListener { private Button button; private ProgressBar pb_test; private RecyclerView recycler_view; private List<Fruit> fruitList=new ArrayList<>(); @Override protected void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); setContentView(R.layout.activity_main); initFruits();//初始化数组 initView(); } private void initView() { button = (Button) findViewById(R.id.button); button.setOnClickListener(this); pb_test = (ProgressBar) findViewById(R.id.pb_test); recycler_view = (RecyclerView) findViewById(R.id.recycler_view); //LinearLayoutManager layoutManager=new LinearLayoutManager(this); //layoutManager.setOrientation(LinearLayoutManager.HORIZONTAL); //横向滚动 GridLayoutManager StaggeredGridLayoutManager 瀑布流 StaggeredGridLayoutManager layoutManager=new StaggeredGridLayoutManager(3,StaggeredGridLayoutManager.VERTICAL); recycler_view.setLayoutManager(layoutManager); FruitAdapter adapter=new FruitAdapter(fruitList); recycler_view.setAdapter(adapter); //recycler_view.setOnClickListener(this); } @Override public void onClick(View v) { switch (v.getId()) { case R.id.button: //SecondActivity.actionStart(MainActivity.this,); /* if (pb_test.getVisibility() == View.GONE) { pb_test.setVisibility(View.VISIBLE); } else pb_test.setVisibility(View.GONE);*/ int progress = pb_test.getProgress(); progress = progress + 10; pb_test.setProgress(progress); break; } } private void initFruits() { for (int i = 0; i < 2; i++) { Fruit apple = new Fruit(getRandomLengthName("Apple"), R.drawable.apple_pic); fruitList.add(apple); Fruit banana = new Fruit(getRandomLengthName("Banana"), R.drawable.banana_pic); fruitList.add(banana); Fruit orange = new Fruit(getRandomLengthName("Orange"), R.drawable.orange_pic); fruitList.add(orange); Fruit watermelon = new Fruit(getRandomLengthName("Watermelon"), R.drawable.watermelon_pic); fruitList.add(watermelon); Fruit pear = new Fruit(getRandomLengthName("Pear"), R.drawable.pear_pic); fruitList.add(pear); Fruit grape = new Fruit(getRandomLengthName("Grape"), R.drawable.grape_pic); fruitList.add(grape); Fruit pineapple = new Fruit(getRandomLengthName("Pineapple"), R.drawable.pineapple_pic); fruitList.add(pineapple); Fruit strawberry = new Fruit(getRandomLengthName("Strawberry"), R.drawable.strawberry_pic); fruitList.add(strawberry); Fruit cherry = new Fruit(getRandomLengthName("Cherry"), R.drawable.cherry_pic); fruitList.add(cherry); Fruit mango = new Fruit(getRandomLengthName("Mango"), R.drawable.mango_pic); fruitList.add(mango); } } private String getRandomLengthName(String name){ Random random=new Random(); int length=random.nextInt(20)+1; StringBuilder builder=new StringBuilder(); for (int i=0;i<length;i++){ builder.append(name); } return builder.toString(); }}

水果类

public class Fruit { private String name; private int imageId; public Fruit(String name, int imageId) { this.name = name; this.imageId = imageId; } public String getName() { return name; } public int getImageId() { return imageId; }}

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