利用反射获取ViewBinding

ViewBindingUtil

import android.view.LayoutInflater;
import android.view.ViewGroup;

import androidx.annotation.NonNull;
import androidx.viewbinding.ViewBinding;

import java.lang.reflect.Method;
import java.lang.reflect.ParameterizedType;
import java.lang.reflect.Type;
import java.util.Objects;

public class ViewBindingUtil {

    public static <Binding extends ViewBinding> Binding create(Class<?> clazz, LayoutInflater inflater) {
        return create(clazz, inflater, null);
    }

    public static <Binding extends ViewBinding> Binding create(Class<?> clazz, LayoutInflater inflater, ViewGroup root) {
        return create(clazz, inflater, root, false);
    }

    @SuppressWarnings("unchecked")
    @NonNull
    public static <Binding extends ViewBinding> Binding create(Class<?> clazz, LayoutInflater inflater, ViewGroup root, boolean attachToRoot) {
        Class<?> bindingClass = getBindingClass(clazz);
        Binding binding = null;
        if (bindingClass != null) {
            try {
                Method method = bindingClass.getMethod("inflate", LayoutInflater.class, ViewGroup.class, boolean.class);
                binding = (Binding) method.invoke(null, inflater, root, attachToRoot);
            } catch (Exception e) {
                e.printStackTrace();
            }
        }
        return Objects.requireNonNull(binding);
    }

    private static Class<?> getBindingClass(Class<?> clazz) {
        ParameterizedType parameterizedType = (ParameterizedType) clazz.getGenericSuperclass();
        Type[] types = Objects.requireNonNull(parameterizedType).getActualTypeArguments();
        Class<?> bindingClass = null;
        for (Type type : types) {
            if (type instanceof Class<?>) {
                Class<?> temp = (Class<?>) type;
                if (ViewBinding.class.isAssignableFrom(temp)) {
                    bindingClass = temp;
                }
            }
        }
        return bindingClass;
    }
}

BaseActivity

import android.os.Bundle;
import android.view.LayoutInflater;

import androidx.annotation.Nullable;
import androidx.appcompat.app.AppCompatActivity;
import androidx.viewbinding.ViewBinding;

public abstract class BaseActivity<Binding extends ViewBinding> extends AppCompatActivity {
    protected Binding binding;

    @Override
    protected void onCreate(@Nullable Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        binding = ViewBindingUtil.create(getClass(), LayoutInflater.from(this));
        setContentView(binding.getRoot());
    }
}

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参考链接：

利用ViewBinding和反射封装的基类，从此再也不用findViewById了