kotlin 定义接口并实现回调的例子

interface CallBack{
 fun callBack(info : String)
}

class CallBacks : CallBack{
 override fun callBack(info : String){
  Log.d("MainApp","current info $info")
 }
}

private var mCallBack = object : CallBack{
 override fun callBack(info : String){
  Log.d("MainApp","current info $info")
 }
}

private fun initData(callBack : CallBack):Boolean{
 callBack?.callBack("我来自回调")
 return true
}

interface OnShakeListener {
  fun onShake()
 }

sensorHelper.setOnShakeListener(object : OnShakeListener {
   override fun onShake() {
    Toast.makeText(applicationContext, "test", Toast.LENGTH_SHORT).show()
   }
  })