BaseActivity

it's good practice to create a base activity to implement common features.

BasicActivity.kt:
    import android.os.Bundle 
    import android.util.Log 

    abstract class BaseActivity : AppCompatActivity() { 
      protected abstract val tag : String 
      protected abstract fun getLayout(): Int    
      protected abstract fun getActivityTitle(): Int

      override fun onCreate(savedInstanceState: Bundle?) { 
        super.onCreate(savedInstanceState) 
        setContentView(getLayout())
        activity_title.setText(getActivityTitle())

        Log.v(tag, "[ ON CREATE ]") 
      } 

      override fun onPostCreate(savedInstanceState: Bundle?) { 
        super.onPostCreate(savedInstanceState) 
        Log.v(tag, "[ ON POST CREATE ]") 
      } 

      override fun onRestart() { 
        super.onRestart() 
        Log.v(tag, "[ ON RESTART ]") 
      } 

      override fun onStart() { 
        super.onStart() 
        Log.v(tag, "[ ON START ]") 
      } 

      override fun onResume() { 
        super.onResume() 
        Log.v(tag, "[ ON RESUME ]") 
      } 

      override fun onPostResume() { 
        super.onPostResume() 
        Log.v(tag, "[ ON POST RESUME ]") 
      } 

      override fun onPause() { 
        super.onPause() 
        Log.v(tag, "[ ON PAUSE ]") 
      } 

      override fun onStop() { 
        super.onStop() 
        Log.v(tag, "[ ON STOP ]") 
      } 

      override fun onDestroy() { 
        super.onDestroy() 
        Log.v(tag, "[ ON DESTROY ]") 
      } 

    } 
    MainActivity.kt:

    class MainActivity : BaseActivity() { 
      override val tag = "Main activity" 
      override fun getLayout() = R.layout.activity_main 
    }