ViewBinding 基类编写

activity基类：

(java)

package com.demo.demo;

import android.content.Context;
import android.os.Bundle;
import android.util.Log;
import android.view.LayoutInflater;

import androidx.annotation.Nullable;
import androidx.fragment.app.FragmentActivity;
import androidx.viewbinding.ViewBinding;

import java.lang.reflect.InvocationTargetException;
import java.lang.reflect.Method;
import java.lang.reflect.ParameterizedType;

public abstract class BaseActivity<T extends ViewBinding> extends FragmentActivity {
    protected Context mContext;
    protected T vb;
    @Override
    protected void onCreate(@Nullable Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        StatusBarUtil.makeStatusBarTransparent(this);
        mContext = this;
        PhoneDataUtil.mobileData();
        ParameterizedType type = (ParameterizedType) getClass().getGenericSuperclass();
        Class cls = (Class) type.getActualTypeArguments()[0];
        try {
            Method inflate = cls.getDeclaredMethod("inflate", LayoutInflater.class);
            vb = (T) inflate.invoke(null, getLayoutInflater());
            setContentView(vb.getRoot());
        } catch (Exception e) {
            Log.e("printStackTrace", "onCreate: ", e);
            e.printStackTrace();
        }
        initView();
    }
   protected abstract void initView();   @Override
   protected void onDestroy() {    
        super.onDestroy();    
        vb = null;
   }}

(kotlin)

package com.demo.kotlin

import android.os.Bundle
import android.util.Log
import android.view.LayoutInflater
import android.view.MotionEvent
import android.view.inputmethod.InputMethodManager
import androidx.appcompat.app.AppCompatActivity
import androidx.viewbinding.ViewBinding
import java.lang.reflect.InvocationTargetException
import java.lang.reflect.ParameterizedType

abstract class BaseActivity <T: ViewBinding> : AppCompatActivity() {
    lateinit var vb: T
    override fun onCreate(savedInstanceState: Bundle?) {
        super.onCreate(savedInstanceState)
        val type = javaClass.genericSuperclass as ParameterizedType
        val cls = type.actualTypeArguments[0] as Class<*>
        try {
            val inflate = cls.getDeclaredMethod("inflate", LayoutInflater::class.java)
            vb = inflate.invoke(null, layoutInflater) as T
            setContentView(vb.root)
            init()
        } catch (e: NoSuchMethodException) {
            e.printStackTrace()
        } catch (e: IllegalAccessException) {
            e.printStackTrace()
        } catch (e: InvocationTargetException) {
            e.printStackTrace()
        }
    }
    abstract fun init()
    /**
     * 点击空白位置 隐藏软键盘
     */
    override fun onTouchEvent(event: MotionEvent): Boolean {
        if (null != this.currentFocus) {
            val mInputMethodManager = getSystemService(INPUT_METHOD_SERVICE) as InputMethodManager
            return mInputMethodManager.hideSoftInputFromWindow(this.currentFocus!!.windowToken, 0)
        }
        return super.onTouchEvent(event)
    }
}

fragment基类:

(java)

package com.demo.demo;

import android.content.Context;
import android.os.Bundle;
import android.view.LayoutInflater;
import android.view.View;
import android.view.ViewGroup;

import androidx.annotation.NonNull;
import androidx.annotation.Nullable;
import androidx.fragment.app.Fragment;
import androidx.viewbinding.ViewBinding;

import java.lang.reflect.InvocationTargetException;
import java.lang.reflect.Method;
import java.lang.reflect.ParameterizedType;
import java.util.ArrayList;
import java.util.Map;

public abstract class BaseFragment<T extends ViewBinding> extends Fragment {
    protected T vb;
    protected Context mContext;
    @Override
    public void onAttach(@NonNull Context context) {
        super.onAttach(context);
        mContext = context;
    }
    @Nullable
    @Override
    public View onCreateView(@NonNull LayoutInflater inflater, @Nullable ViewGroup container, @Nullable Bundle savedInstanceState) {
        ParameterizedType type = (ParameterizedType) getClass().getGenericSuperclass();
        Class cls = (Class) type.getActualTypeArguments()[0];
        try {
            Method inflate = cls.getDeclaredMethod("inflate", LayoutInflater.class, ViewGroup.class, boolean.class);
            vb = (T) inflate.invoke(null, inflater, container, false);
        }  catch (Exception e) {
            e.printStackTrace();
        }
        return vb.getRoot();
    }
    @Override
    public void onViewCreated(@NonNull View view, @Nullable Bundle savedInstanceState) {
        super.onViewCreated(view, savedInstanceState);
        initView();
    }
    protected abstract void initView();
    @Override
    public void onDestroy() {
        super.onDestroy();
        vb = null;
    }
}

(kotlin)

package com.demo.kotlin
import android.content.Context
import android.os.Bundle
import android.view.LayoutInflater
import android.view.View
import android.view.ViewGroup
import androidx.fragment.app.Fragment
import androidx.viewbinding.ViewBinding
import java.lang.reflect.ParameterizedType

abstract class BaseFragmentVB<T : ViewBinding?> : Fragment() {
    protected var vb: T? = null
    protected var mContext: Context? = null
    override fun onAttach(context: Context) {
        super.onAttach(context)
        mContext = context
    }

    override fun onCreateView(inflater: LayoutInflater,container: ViewGroup?,savedInstanceState: Bundle?): View? {
        val type = javaClass.genericSuperclass as ParameterizedType
        val cls = type.actualTypeArguments[0] as Class<*>
        try {
            val inflate = cls.getDeclaredMethod("inflate", LayoutInflater::class.java,
                ViewGroup::class.java,
                Boolean::class.javaPrimitiveType
            )
            vb = inflate.invoke(null, inflater, container, false) as T
        } catch (e: Exception) {
            e.printStackTrace()
        }
        return vb!!.root
    }

    override fun onViewCreated(view: View, savedInstanceState: Bundle?) {
        super.onViewCreated(view, savedInstanceState)
        init()
    }

    protected abstract fun init()
    override fun onDestroy() {
        super.onDestroy()
        vb = null
    }
}