1、MyDataBindingActivity

ps:拿到binding的方式如下

activityMyDataBindingBinding = DataBindingUtil.setContentView(this, R.layout.activity_my_data_binding);

public class MyDataBindingActivity extends BaseActivity {
    private MyDataBindingViewModel vModel;
    private ActivityMyDataBindingBinding activityMyDataBindingBinding;
    private
 
 MyDataBindingAdapter adapter;
    private List<String> list = new ArrayList<>();

    @Override
    protected void onCreate(@Nullable Bundle savedInstanceState) {
        activityMyDataBindingBinding = DataBindingUtil.setContentView(this, R.layout.activity_my_data_binding);
        super
 
.onCreate(savedInstanceState);
//佈局檔案中必須有data標籤，data標籤裡可以毛都沒有,所以下面兩行不需要的時候可以不寫
        //vModel = new MyDataBindingViewModel(this);
        //activityMyDataBindingBinding.setVmodel(vModel);
        initView();
        registerListner();
        initData();
    }

    private void initData() {
        for (int
 
 i = 0; i < 30; i++) {
            list.add("test databinding" + i);
        }
        adapter.notifyDataSetChanged();
    }

    private void registerListner() {

    }

    private void initView() {
        activityMyDataBindingBinding.activityMyDataRv.setLayoutManager(new LinearLayoutManager(this));
        adapter = new MyDataBindingAdapter(this, list);
        activityMyDataBindingBinding.activityMyDataRv.setAdapter(adapter);
    }

}

佈局activity_my_data_binding

ps:layout標籤下不要有寬高等屬性，data標籤必須有，但是內部可以毛都沒有

<?xml version="1.0" encoding="utf-8"?>
<layout xmlns:android="http://schemas.android.com/apk/res/android">

    <data>

    </data>

    <RelativeLayout
        android:layout_width="match_parent"
        android:layout_height="match_parent">

        <android.support.v7.widget.RecyclerView
            android:id="@+id/activity_my_data_rv"
            android:layout_width="match_parent"
            android:layout_height="match_parent">

        </android.support.v7.widget.RecyclerView>
    </RelativeLayout>

</layout>

2、MyDataBindingAdapter

ps:拿到binding的方式如下

ItemMyDataBinding binding = DataBindingUtil.inflate(LayoutInflater.from(parent.getContext()), R.layout.item_my_data, parent, false);

public class MyDataBindingAdapter extends RecyclerView.Adapter<MyDataBindingAdapter.MyViewHolder> {
    private Context mContext;
    private List<String> mList = new ArrayList<>();

    public MyDataBindingAdapter(Context context, List<String> list) {
        mContext = context;
        mList = list;
    }

    @Override
    public MyViewHolder onCreateViewHolder(ViewGroup parent, int viewType) {
        ItemMyDataBinding binding = DataBindingUtil.inflate(LayoutInflater.from(parent.getContext()), R.layout.item_my_data, parent, false);
        return new MyViewHolder(binding);
    }

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

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

    public static class MyViewHolder extends RecyclerView.ViewHolder {
        private ItemMyDataBinding binding;

        public MyViewHolder(ItemMyDataBinding binding) {
            super(binding.getRoot());
            this.binding = binding;
        }

        public ItemMyDataBinding getBinding() {
            return binding;
        }

        public void bindData(String s) {
         //可以直接使用binding拿到view來操作
         binding.itemMyDataTvName.setText(s);
  //也可以使用databinding的優勢特徵，view隨data變化,如下兩行
         //binding.setVariable(BR.vmoduels, model);
         //binding.executePendingBindings();
        }
    }
}

佈局item_my_data

<?xml version="1.0" encoding="utf-8"?>
<layout xmlns:android="http://schemas.android.com/apk/res/android">

    <data>

    </data>

    <RelativeLayout
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:gravity="center">

        <TextView
            android:id="@+id/item_my_data_tv_name"
            android:layout_width="match_parent"
            android:layout_height="40dp"
            android:gravity="center"
            android:textColor="#ce0000"
            android:textSize="15sp" />
    </RelativeLayout>

</layout>

3、自定義view中拿到databinding物件

public class MyView extends FrameLayout {
    private Context mContext;
    private MyViewBinding binding;

    private List<String> mList = new ArrayList<>();

    public MyView(@NonNull Context context) {
        this(context, null);
    }

    public MyView(@NonNull Context context, @Nullable AttributeSet attrs) {
        this(context, attrs, 0);
    }

    public MyView(@NonNull Context context, @Nullable AttributeSet attrs, @AttrRes int defStyleAttr) {
        super(context, attrs, defStyleAttr);
        mContext = context;
        View mainView = LayoutInflater.from(context).inflate(R.layout_my_view, null);
        //就是下面這句
        binding = DataBindingUtil.bind(mainView);
        initView();
        registerLitener();
        initData();
        addView(mainView);
    }
 }