FragmentTransaction不會在科特林的Android項目

編譯使用Android，未能編譯和一般無益的錯誤的文字給我留下難倒學習科特林的過程。錯誤文字說明如下：FragmentTransaction不會在科特林的Android項目

以下函數都不能用提供的參數調用。添加（片段！字符串！）在定義android.app.FragmentTransaction添加（中間體，片段！）在 android.app.FragmentTransaction

定義在這兩種情況下，片段！文字以紅色突出顯示。我意識到Kotlin提到了帶有！的Java類，但我似乎無法理解爲什麼它不滿意我提供輸入的方式。

任何有識之士將不勝感激。

fun displayEditRoutine(){ 

    //Set our variables 
    var ft = fragmentManager.beginTransaction() 

    //Basic "newInstance" constructor to avoid omitting necessary variables 
    var frag = EditRoutine.newInstance(mRoutineID,this) 

    //Here is where error occurs 
    ft.add(R.id.are_container, frag).commit() 

}

的EditRoutine類被引用：

class EditRoutine : Fragment() { 

//Variables 
private var mRoutineID: String? = null 
private var mListener: OnEditRoutineFragmentListener? = null 

//Views 
@BindView(R.id.fer_routineName) internal var vRoutine: TextInputEditText? = null 

override fun onCreate(savedInstanceState: Bundle?) { 
    super.onCreate(savedInstanceState) 
    if (arguments != null) { 
     mRoutineID = arguments.getString(Keys.b_RoutineID) 
    } 
} 

override fun onCreateView(inflater: LayoutInflater, container: ViewGroup?, 
          savedInstanceState: Bundle?): View? { 
    val v = inflater.inflate(R.layout.fragment_edit_routine, container, false) 
    ButterKnife.bind(activity) 
    return v 
} 

// TODO: Rename method, update argument and hook method into UI event 
fun onButtonPressed(): Unit{ 
    if (mListener != null && vRoutine!!.text.toString() != "") { 
     val contentValues = ContentValues() 
     contentValues.put(Routine.Table.KEY_NAME, vRoutine!!.text.toString()) 

     //Pass the values into the interface 
     mListener!!.onDoneClicked(contentValues) 
    } 
} 

override fun onAttach(context: Context) { 
    super.onAttach(context) 
    if (context is OnEditRoutineFragmentListener) { 
     mListener = context 
    } else { 
     throw RuntimeException(context.toString() + " must implement OnEditRoutineFragmentListener") 
    } 
} 

override fun onDetach() { 
    super.onDetach() 
    mListener = null 
} 

//Internal Methods 


//Interface 
interface OnEditRoutineFragmentListener { 
    // TODO: Update argument type and name 
    fun onDoneClicked(cv: ContentValues) 

} 

companion object { 

    /** 
    * @param routineID = passed ID. If null, don't load content values 
    * * 
    * @return A new instance of fragment EditRoutine. 
    */ 
    fun newInstance(routineID: String, ctx: Context): EditRoutine { 
     val fragment = EditRoutine() 
     val args = Bundle() 
     args.putString(Keys.b_RoutineID, routineID) 
     fragment.arguments = args 
     return fragment 
    } 
}

來源

2017-06-12 Josh Ribeiro

如果你正在創建支持片段，你應該使用supportFragmentManager而不是fragmentManager – BladeCoder

你可以發佈你的'EditRoutine'類嗎？ – Marce

感謝您的建議。我分API爲19，所以我用常規的片段 –

嘗試這種情況： ft.add(R.id.container_all, frag as Fragment).commit()

來源

2017-06-12 20:54:45 Marce

工作正常，我猜Kotlin看不到我班上的父母 –

JvmStatic：需要此註解（documentation）

伴侶對象{

/** 
* @param routineID = passed ID. If null, don't load content values 
* * 
* @return A new instance of fragment EditRoutine. 
*/ 

@JvmStatic 
fun newInstance(routineID: String, ctx: Context): EditRoutine { 
    val fragment = EditRoutine() 
    val args = Bundle() 
    args.putString(Keys.b_RoutineID, routineID) 
    fragment.arguments = args 
    return fragment 
}

}

來源

2017-06-13 03:22:20

FragmentTransaction不會在科特林的Android項目

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