如何避免 activity 和片段中的重复代码？

Question

当一个activity启动时，检查其中的条件，如果条件为真，则调用openNewActivity方法，当前的activity结束。但是如果条件为假，则对片段进行转换，在该片段中这个条件可以变为真，然后您需要调用 openNewActivity 方法，该方法定义在 activity 中。我不想在片段中复制此方法，如何从片段中正确实现对此方法的调用？这种情况下的最佳做法是什么？

Answer 1

Activity

class FirstActivity : AppCompatActivity(), MyInterface {

     override fun onSomethingDone() { //This function gets called when the condition is true
        openNewActivity()
     }


     override fun onAttachFragment(fragment: Fragment) { //A fragment MUST never know it's an activity, so we exposed fragment interface member to easily initialize it whenever the fragment is attached to the activity.
         when (fragment) {
              is MyFragment -> fragment.myInterface = this
            }

      }

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


    private fun openNewActivity() {
        //opens a new activity    
    }

}

界面

interface MyInterface {
     fun onSomethingDone()
}

片段

class MyFragment : Fragment() {
   var myInterface: MyInterface? = null


 override fun onCreate() {
     if (somethingIsTrue)
         myInterface.onSomethingDone() //condition is true, call the interface method to inform the activity that the condition is true and the new activity should be opened.
   }

}

创建一个界面。由于代码中提到的原因，在 activity 的 onAttachFragment 中初始化片段的接口。这样，用于启动新 activity 的函数仅在 activity 中定义，不需要在片段中重复。

如何避免 activity 和片段中的重复代码？

How to avoid duplicate code in the activity and fragment?

android

code-duplication