ViewBinding使用以及Base基类简单封装_viewbinding 封装

• 简单介绍：

        ViewBinding大白话讲就是可以帮助开发者快速找到有id的控件，废话不多说往下走..

• 简单使用：

在需要使用模块下.gradle文件中配置：

android {
        buildFeatures {
            viewBinding = true
        }
}

配置完成就可以使用了

例如：

class TextActivity : AppCompatActivity() {
    lateinit var binding:ActivityTextBinding
    override fun onCreate(savedInstanceState: Bundle?) {
        super.onCreate(savedInstanceState)
        binding = ActivityTextBinding.inflate(layoutInflater)
        setContentView(binding.root)
        binding.btn.setOnClickListener {}
    }
}

ActivityTextBinding类是由对应的activity_text.xml文件去生成的，

如果不想让xml去生成对应的Binding文件可以在xml跟标签加上

tools:viewBindingIgnore="true" 即可

• 封装BaseActivity基类

abstract class BaseActivity<VB : ViewBinding> : AppCompatActivity() {
    protected lateinit var binding: VB
    override fun onCreate(savedInstanceState: Bundle?) {
        initial()
        super.onCreate(savedInstanceState)
        binding = createBinding()
        setContentView(binding.root)
        initView()
        initData()
    }
    open fun initial(){}
    protected abstract fun initView()
    protected abstract fun initData()
 
    private fun createBinding(): VB {
        val vbClass = getVBClass()
        val inflateMethod = vbClass.getMethod("inflate", LayoutInflater::class.java)
        return inflateMethod.invoke(null, layoutInflater) as VB
    }
 
    @Suppress("UNCHECKED_CAST")
    private fun getVBClass(): Class<VB> {
        val type = javaClass.genericSuperclass as ParameterizedType
        val vbClass = type.actualTypeArguments[0] as Class<VB>
 
        return vbClass
    }
}

• 封装BaseFragment基类

abstract class BaseFragment<VB : ViewBinding> : Fragment() {
 
    protected lateinit var binding: VB
 
    override fun onCreateView(
        inflater: LayoutInflater,
        container: ViewGroup?,
        savedInstanceState: Bundle?
    ): View? {
        binding = createBinding(inflater, container)
        return binding.root
    }
 
    override fun onViewCreated(view: View, savedInstanceState: Bundle?) {
        super.onViewCreated(view, savedInstanceState)
        initView()
        initData()
    }
 
    abstract fun initData()
 
    protected abstract fun initView()
 
    private fun createBinding(inflater: LayoutInflater, container: ViewGroup?): VB {
        val vbClass = getVBClass()
        val inflateMethod = vbClass.getMethod("inflate", LayoutInflater::class.java, ViewGroup::class.java, Boolean::class.java)
        return inflateMethod.invoke(null, inflater, container, false) as VB
    }
 
    @Suppress("UNCHECKED_CAST")
    private fun getVBClass(): Class<VB> {
        val type = javaClass.genericSuperclass as ParameterizedType
        val vbClass = type.actualTypeArguments[0] as Class<VB>
        return vbClass
    }
 
}

• 注意

如果开启了混淆请在proguard-rules.pro文件添加：

-keep class * implements androidx.viewbinding.ViewBinding {
    *;
}

 大功告成