privatevoidinitFruits(){ for (int i = 0; i < 2; i++) { Fruit apple = new Fruit("Apple", R.drawable.apple_pic); fruitList.add(apple); Fruit banana = new Fruit("Banana", R.drawable.banana_pic); fruitList.add(banana); Fruit orange = new Fruit("Orange", R.drawable.orange_pic); fruitList.add(orange); Fruit watermelon = new Fruit("Watermelon", R.drawable.watermelon_pic); fruitList.add(watermelon); Fruit pear = new Fruit("Pear", R.drawable.pear_pic); fruitList.add(pear); Fruit grape = new Fruit("Grape", R.drawable.grape_pic); fruitList.add(grape); Fruit pineapple = new Fruit("Pineapple", R.drawable.pineapple_pic); fruitList.add(pineapple); Fruit strawberry = new Fruit("Strawberry", R.drawable.strawberry_pic); fruitList.add(strawberry); Fruit cherry = new Fruit("Cherry", R.drawable.cherry_pic); fruitList.add(cherry); Fruit mango = new Fruit("Mango", R.drawable.mango_pic); fruitList.add(mango);
private List<Fruit> fruitList = new ArrayList<>();
@Override protectedvoidonCreate(Bundle savedInstanceState){ super.onCreate(savedInstanceState); setContentView(R.layout.activity_main); initFruits(); RecyclerView recyclerView = (RecyclerView) findViewById(R.id.recycler_view); StaggeredGridLayoutManager layoutManager = new StaggeredGridLayoutManager(3,StaggeredGridLayoutManager.VERTICAL); recyclerView.setLayoutManager(layoutManager); FruitAdapter adapter = new FruitAdapter(fruitList); recyclerView.setAdapter(adapter); } privatevoidinitFruits(){ 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; // 產生1-20的隨機數 StringBuilder builder = new StringBuilder(); for (int i =0;i<length;i++){ builder.append(name); } return builder.toString(); } }
StaggeredGridLayoutManager layoutManager = new StaggeredGridLayoutManager(3,StaggeredGridLayoutManager.VERTICAL); StaggeredGridLayoutManager傳入2個參數,第一個是佈局的列數,第二個是佈局的排列方向。
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 publicvoidonClick(View view){ int position = holder.getAdapterPosition(); Fruit fruit = mFruitList.get(position); Toast.makeText(view.getContext(), "you clicked view" + fruit.getName(), Toast.LENGTH_SHORT).show(); } });
holder.fruitImage.setOnClickListener(new View.OnClickListener() { @Override publicvoidonClick(View view){ int position = holder.getAdapterPosition(); Fruit fruit = mFruitList.get(position); Toast.makeText(view.getContext(), "you clicked image" + fruit.getName(), Toast.LENGTH_SHORT).show(); } }); return holder; }