韦东山Android

韦东山Android

韦东山（WDS）是一位知名的Android开发工程师，专注于移动应用程序的开发和优化。他在Android领域拥有丰富的经验和技术实力。在这篇文章中，我们将介绍一些韦东山常用的Android开发技巧和他的代表作品。

1. 代码示例

以下是韦东山经常使用的一些代码示例：

1.1 Hello World

public class MainActivity extends AppCompatActivity {
    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);

        TextView textView = findViewById(R.id.text_view);
        textView.setText("Hello World");
    }
}

1.2 RecyclerView

public class RecyclerViewAdapter extends RecyclerView.Adapter<RecyclerViewAdapter.ViewHolder> {
    private List<String> mData;

    public RecyclerViewAdapter(List<String> data) {
        mData = data;
    }

    @Override
    public ViewHolder onCreateViewHolder(ViewGroup parent, int viewType) {
        View view = LayoutInflater.from(parent.getContext()).inflate(R.layout.item_layout, parent, false);
        return new ViewHolder(view);
    }

    @Override
    public void onBindViewHolder(ViewHolder holder, int position) {
        holder.bindData(mData.get(position));
    }

    @Override
    public int getItemCount() {
        return mData.size();
    }

    public static class ViewHolder extends RecyclerView.ViewHolder {
        private TextView mTextView;

        public ViewHolder(View itemView) {
            super(itemView);
            mTextView = itemView.findViewById(R.id.text_view);
        }

        public void bindData(String data) {
            mTextView.setText(data);
        }
    }
}

1.3 Retrofit

public interface ApiService {
    @GET("users/{user}/repos")
    Call<List<Repo>> listRepos(@Path("user") String user);
}

public class RetrofitClient {
    private static Retrofit retrofit = null;

    public static Retrofit getClient() {
        if (retrofit == null) {
            retrofit = new Retrofit.Builder()
                    .baseUrl("
                    .addConverterFactory(GsonConverterFactory.create())
                    .build();
        }
        return retrofit;
    }
}

public class MainActivity extends AppCompatActivity {
    private RecyclerView mRecyclerView;
    private RecyclerViewAdapter mAdapter;
    private List<Repo> mData = new ArrayList<>();

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);

        mRecyclerView = findViewById(R.id.recycler_view);
        mRecyclerView.setLayoutManager(new LinearLayoutManager(this));
        mAdapter = new RecyclerViewAdapter(mData);
        mRecyclerView.setAdapter(mAdapter);

        ApiService apiService = RetrofitClient.getClient().create(ApiService.class);
        Call<List<Repo>> call = apiService.listRepos("WDS");
        call.enqueue(new Callback<List<Repo>>() {
            @Override
            public void onResponse(Call<List<Repo>> call, Response<List<Repo>> response) {
                if (response.isSuccessful()) {
                    mData.addAll(response.body());
                    mAdapter.notifyDataSetChanged();
                }
            }

            @Override
            public void onFailure(Call<List<Repo>> call, Throwable t) {
                Toast.makeText(MainActivity.this, "Error: " + t.getMessage(), Toast.LENGTH_SHORT).show();
            }
        });
    }
}

2. 关系图

以下是韦东山在Android开发中常用到的关系图：

erDiagram
    USER }|..| ADDRESS : has
    USER ||--o{ ORDER : places
    USER ||--o{ POST : writes
    ADDRESS ||--o{ ORDER : delivers
    ORDER ||--|{ ORDER_ITEM : includes
    PRODUCT-CATEGORY ||--|{ PRODUCT : contains
    PRODUCT ||--|{ ORDER_ITEM : ordered

3. 甘特图

以下是韦东山在Android项目开发中使用的甘特图：

gantt
    title Android项目开发甘特图
    dateFormat  YYYY-MM-DD
    section 项目准备
    需求分析           :active, des1, 2022-01-01, 30d
    技术调研           :des2, after des1, 2022-01-31, 30d
    UI设计             :des3, after des2, 2022-02-28, 20d
    section 项目开发
    模块一开发      :active, des4, 2022-03-20, 30d
    模块二开发      :des5, after des4, 2022-04-19, 30d
    模块三开发      :des5, after des5, 2022-05-18, 30d
    section 测试与发布
    单元测试           :des6, after des5, 2022-06-17, 10d
    集