Android DataBinding 简单封装

以下代码来源JDataBinding
作者微信公众号:ByteCode

1. Activity里封装DataBinding

protected inline fun <reified T : ViewDataBinding> binding(
    @LayoutRes resId: Int
): Lazy<T> = lazy {
    
     DataBindingUtil.setContentView<T>(this, resId) }

• 使用

private val mBinding: ActivityMainBinding by binding(R.layout.activity_main)
 override fun onCreate(savedInstanceState: Bundle?) {
    
    
     super.onCreate(savedInstanceState)
     mBinding.apply {
    
    
        // TODO
     }
}

2. Fragment里封装

protected inline fun <reified T : ViewDataBinding> binding(
    inflater: LayoutInflater,
    @LayoutRes resId: Int,
    container: ViewGroup?
): T = DataBindingUtil.inflate(inflater, resId, container, false)

• 使用

override fun onCreateView(
    inflater: LayoutInflater,
    container: ViewGroup?,
    savedInstanceState: Bundle?
): View? {
    
    
    return binding<FragmentTestBinding>(
        inflater,
        R.layout.fragment_test, container
    ).apply {
    
    
        viewModel = testViewModel
        testAdapter = TestAdapter()
        lifecycleOwner = this@FragmentTest
    }.root
}

3. ViewHolder中封装

inline fun <reified T : ViewDataBinding> viewHolderBinding(view: View): Lazy<T> = lazy {
    
    
    requireNotNull(DataBindingUtil.bind<T>(view)) {
    
     "cannot find the matched layout." }
}

• 使用

private val mBinding: RecycleItemAlbumBinding by viewHolderBinding(view)
override fun bindData(data: PokemonInfoModel.AlbumModel, position: Int) {
    
    
    mBinding.apply {
    
    
        album = data
        executePendingBindings()
    }
}