Android开发学习之路06

今天我们继续深入学习了Android开发，主要关注了RecyclerView的使用和配置。RecyclerView是一个更加灵活和高效的视图，用于显示大量数据集。它比ListView更适合处理大量和复杂的数据。在build.gradle文件中添加RecyclerView的依赖：在res/layout目录下创建一个RecyclerView的布局文件，如activity_main.xml：创建数据适配器： 创建一个RecyclerView的适配器类，用于绑定数据：

public class MyAdapter extends RecyclerView.Adapter<MyAdapter.ViewHolder> {

    private List<String> mData;

 

    public MyAdapter(List<String> data) {

        this.mData = data;

    }

 

    @Override

    public ViewHolder onCreateViewHolder(ViewGroup parent, int viewType) {

        View view = LayoutInflater.from(parent.getContext()).inflate(R.layout.item_view, parent, false);

        return new ViewHolder(view);

    }

 

    @Override

    public void onBindViewHolder(ViewHolder holder, int position) {

        holder.textView.setText(mData.get(position));

    }

 

    @Override

    public int getItemCount() {

        return mData.size();

    }

 

    public static class ViewHolder extends RecyclerView.ViewHolder {

        public TextView textView;

 

        public ViewHolder(View itemView) {

            super(itemView);

            textView = itemView.findViewById(R.id.textView);

        }

    }

}

在MainActivity中初始化RecyclerView并设置适配器：

public class MainActivity extends AppCompatActivity {

 

    @Override

    protected void onCreate(Bundle savedInstanceState) {

        super.onCreate(savedInstanceState);

        setContentView(R.layout.activity_main);

 

        RecyclerView recyclerView = findViewById(R.id.recyclerView);

        recyclerView.setLayoutManager(new LinearLayoutManager(this));

 

        List<String> data = new ArrayList<>();

        for (int i = 0; i < 20; i++) {

            data.add("Item " + i);

        }

 

        MyAdapter adapter = new MyAdapter(data);

        recyclerView.setAdapter(adapter);

    }

}