Android开发|DataBinding 绑定Recyclerview及点击事件绑定recyclerview|DataBinding|DataBi

最近在学习DataBinding，在这里记录下学习的轨迹
收获：
1代码解耦。
2少些很多没有营养的代码，美观度高！
遇坑：
1官方文档 https://developer.android.com/topic/libraries/data-binding/index.html#listener_bindings 写的真是简单，
只提供码片段，需要结合博客和别的资料一齐看，才大概明白其中的奥妙。
2不容易定位错误。编译通过，无法安装。请看上篇文章 https://blog.csdn.net/qq_35599978/article/details/80028278
3如果绑定数据的XML需要增加那么数据绑定的XXBinding无法调用.setVariable(),因为项目没有编译。后来发现就算
我手动build ，clean，sync project，或者删掉.build文件,再sync project，还是不管用，只能关掉studio，再打开，你发现
世界真美好。我的studio version 3.1

Activity主页布局代码

RecyclerView Item 布局代码

itemclidk.onClicked(view,user)}" android:layout_width="match_parent" android:layout_height="wrap_content">

点击事件的接口

public interface ItemClick { void onClicked(View veiw, User user); }

Activitie 代码

public class ScrollingActivity extends AppCompatActivity {@Override protected void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); ActivityScrolling2Binding binding = DataBindingUtil.setContentView(this, R.layout.activity_scrolling2); UserBean bean = new UserBean("andry","13years","swimming"); binding.setUserbean(bean); bean.setName("new_name"); binding.recycleVeiw.setAdapter(new UserAdapter(new ItemClick() { @Override public void onClicked(View veiw, User user) { Snackbar.make(veiw, user.getName(), Snackbar.LENGTH_LONG) .setAction("Action", null).show(); } })); binding.recycleVeiw.setLayoutManager(new LinearLayoutManager(this, LinearLayoutManager.VERTICAL,false)); } }

adapter 对应的bean

public class User extends BaseObservable {public User(String name, @DrawableRes int res) { this.name = name; this.res = res; }String name; public@Bindable int res; @Bindable public String getName() { return name; }public void setName(String name) { this.name = name; notifyPropertyChanged(BR.name); }public void setRes(int res) { this.res = res; }public User getData() { return this; } }

adapter对应的代码

public class UserAdapter extends RecyclerView.Adapter { ItemClick itemClick; @NonNull private List mUsers; private static final int USER_COUNT = 10; public UserAdapter(ItemClick itemClick) { this.itemClick = itemClick; mUsers = new ArrayList<>(10); for (int i = 0; i < USER_COUNT; i ++) { User user = new User("name -- "+i, R.drawable.ic_launcher_background); mUsers.add(user); } }@Override public UserHolder onCreateViewHolder(ViewGroup parent, int viewType) { ItemRecycleviewBinding binding = DataBindingUtil. inflate(LayoutInflater.from(parent.getContext()) ,R.layout.item_recycleview, parent, false); UserHolder userHolder = new UserHolder(binding.getRoot()); userHolder.setBinding(binding); return userHolder; }@Override public void onBindViewHolder(UserHolder holder, int position) { holder.bind(mUsers.get(position),itemClick); }@Override public int getItemCount() { return mUsers.size(); }public static class UserHolder extends RecyclerView.ViewHolder { private ItemRecycleviewBinding mBinding; public UserHolder(View itemView) { super(itemView); }public void bind(@NonNull User user,ItemClick itemClick) { mBinding.setUser(user); mBinding.executePendingBindings(); mBinding.setItemclidk(itemClick); }public void setBinding(ItemRecycleviewBinding binding) { this.mBinding = binding; } } }

activity对应的viewmodel

publicclass UserBean{ public String name,age,hobby; public String getName() { return name; }public String getAge() { return age; }public void setAge(String age) { this.age = age; }public String getHobby() { return hobby; }public void setHobby(String hobby) { this.hobby = hobby; }public UserBean(String name, String age, String hobby) { this.name = name; this.age = age; this.hobby = hobby; }public void setName(String name) { this.name = name; //notifyPropertyChanged(BR.userbean); } }

【Android开发|DataBinding 绑定Recyclerview及点击事件】