Android kotlin中BaseViewBindActivity

之前使用的痛点每次都要通过binding.控件（第一幅图），大量重复代码。

不能直接通过控件id使用方便，通过拓展直接使用点击控件第二幅图。

abstract class BaseActivity : AppCompatActivity() {

    private lateinit var _binding: T
    protected val binding get() = _binding


    final override fun onCreate(savedInstanceState: Bundle?) {
        super.onCreate(savedInstanceState)
        _binding = getViewBinding()
        setContentView(_binding.root)
        transparentStatusBar()
        with(_binding){
            initView()
            initListener()
            initData()
        }
    }

    override fun onDestroy() {
        requestedOrientation = ActivityInfo.SCREEN_ORIENTATION_UNSPECIFIED
        super.onDestroy()
    }

    
    open fun T.initView() {}

    
    open fun T.initListener() {}

    
    open fun T.initData() {}


    override fun onLowMemory() {
        super.onLowMemory()
    }


    protected abstract fun getViewBinding(): T
}

class MainActivity : BaseActivity() {

    override fun ActivityMainBinding.initView() {
        Log.e("BaseActivity", "------->initView")
        btnPicture.text = "测试"
    }

    override fun ActivityMainBinding.initData() {
        Log.e("BaseActivity", "------->initData")
    }

    override fun ActivityMainBinding.initListener() {
        Log.e("BaseActivity", "------->initListener")

       
        btnPicture.setOnClickListener {
            Toast.makeText(this@MainActivity, "测试显示", Toast.LENGTH_SHORT).show()
        }
    }

    override fun getViewBinding(): ActivityMainBinding {
        return ActivityMainBinding.inflate(layoutInflater)
    }

}