Fruit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; } }
FruitAdapter 适配器
/** * Created by 13178 on 2018-6-11. * 自定义适配器 */ public class FruitAdapter extends RecyclerView.Adapter<FruitAdapter.ViewHolder> { private List<Fruit> mFruitList; //内部类ViewHolder static class ViewHolder extends RecyclerView.ViewHolder{ View fruitView; ImageView fruitImage; TextView fruitName; public ViewHolder(View view){ super(view); fruitView = view; fruitImage = (ImageView) view.findViewById(R.id.fruit_image); fruitName = (TextView) view.findViewById(R.id.fruit_name); } } //构造函数 public FruitAdapter(List<Fruit> fruitList){ mFruitList = fruitList; } //重写下面三个方法 @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(),"你点击了View"+fruit.getName(), 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(),"你点击了图片"+fruit.getName(), Toast.LENGTH_SHORT).show(); } }); return holder; } @Override public void onBindViewHolder(ViewHolder holder, int position) {//给RecyclerView子项赋值 Fruit fruit = mFruitList.get(position); holder.fruitImage.setImageResource(fruit.getImageId()); holder.fruitName.setText(fruit.getName()); } //一共多少子项 @Override public int getItemCount() { return mFruitList.size(); } }
MainActivity
public class MainActivity extends AppCompatActivity { private List<Fruit> fruitList = new ArrayList<>(); @Override protected void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); setContentView(R.layout.activity_main); initFruits(); RecyclerView recyclerView = (RecyclerView) findViewById(R.id.recycler_view); //LinearLayoutManager layoutManager = new LinearLayoutManager(this); //layoutManager.setOrientation(LinearLayoutManager.HORIZONTAL); StaggeredGridLayoutManager layoutManager = new StaggeredGridLayoutManager(3,StaggeredGridLayoutManager.VERTICAL); recyclerView.setLayoutManager(layoutManager); FruitAdapter adapter = new FruitAdapter(fruitList); recyclerView.setAdapter(adapter); } private void initFruits(){ for(int i=0;i<2;i++){ Fruit apple = new Fruit(getRandomLengthName("苹果"),R.drawable.apple_pic); fruitList.add(apple); Fruit banana = new Fruit(getRandomLengthName("香蕉"),R.drawable.banana_pic); fruitList.add(banana); Fruit orange = new Fruit(getRandomLengthName("桔子"),R.drawable.orange_pic); fruitList.add(orange); Fruit watermelon = new Fruit(getRandomLengthName("西瓜"),R.drawable.watermelon_pic); fruitList.add(watermelon); Fruit pear = new Fruit(getRandomLengthName("梨子"),R.drawable.pear_pic); fruitList.add(pear); Fruit grape = new Fruit(getRandomLengthName("葡萄"),R.drawable.grape_pic); fruitList.add(grape); Fruit pineapple = new Fruit(getRandomLengthName("菠萝"),R.drawable.pineapple_pic); fruitList.add(pineapple); Fruit strawberry = new Fruit(getRandomLengthName("草莓"),R.drawable.strawberry_pic); fruitList.add(strawberry); Fruit cherry = new Fruit(getRandomLengthName("樱桃"),R.drawable.cherry_pic); fruitList.add(cherry); Fruit mango = new Fruit(getRandomLengthName("芒果"),R.drawable.mango_pic); fruitList.add(mango); } } private String getRandomLengthName(String name){ Random random = new Random(); int length = random.nextInt(10) + 5; StringBuilder buider = new StringBuilder(); for (int i=0 ; i<length ; i++){ buider.append(name); } return buider.toString(); } }
activity_main.xml
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android" android:orientation="vertical" android:layout_width="match_parent" android:layout_height="match_parent"> <android.support.v7.widget.RecyclerView android:id="@+id/recycler_view" android:layout_width="match_parent" android:layout_height="match_parent"/> </LinearLayout>
fruit_item.xml
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android" android:orientation="vertical" android:layout_width="match_parent" android:layout_height="wrap_content" android:layout_margin="5dp"> <ImageView android:id="@+id/fruit_image" android:layout_width="wrap_content" android:layout_height="wrap_content" android:layout_gravity="center_horizontal"/> <TextView android:id="@+id/fruit_name" android:layout_width="wrap_content" android:layout_height="wrap_content" android:layout_gravity="left" android:layout_marginTop="10dp"/> </LinearLayout>