일부보기 요소가 숨기거나 표시되지 않습니다.

Question

가시성을 Gone으로 설정하면 일부보기 요소가 숨겨지지 않고 Visible으로 설정하면 다른보기 요소가 표시되지 않습니다.

이 예에서 cmdCallMe는 숨기지 않고 cmdOk 및 cmdCancel은 나타나지 않습니다. 다른 요소는 모두 예상대로 작동합니다.

(소스 약간 단축)

활동 코드 :

protected override void OnCreate(Bundle bundle) 
    { 
     base.OnCreate(bundle); 

     SetContentView(Resource.Layout.p2); 
     titleStatusView = FindViewById<TextView>(Resource.Id.lblP2Status); 
     outputTextView = FindViewById<TextView>(Resource.Id.lblP2Timer); 
     lblConfirm = FindViewById<TextView>(Resource.Id.lblP2Confirm); 
     cmdP2Update = FindViewById<Button>(Resource.Id.cmdP2Update); 
     cmdP2Arrived = FindViewById<Button>(Resource.Id.cmdP2Arrived); 
     cmdP2SelfDeployed = FindViewById<Button>(Resource.Id.cmdP2SelfDeployed); 
     cmdP2CallMe = FindViewById<Button>(Resource.Id.cmdP2CallMe); 

     cmdOk = FindViewById<Button>(Resource.Id.cmdP2CallMe); 
     cmdCancel = FindViewById<Button>(Resource.Id.cmdP2CallMe); 

     // hide normal buttons 
     // these all hide as expected 
     cmdP2Update.Visibility = ViewStates.Gone; 
     cmdP2Arrived.Visibility = ViewStates.Gone; 
     cmdP2SelfDeployed.Visibility = ViewStates.Gone; 
     // this should hide cmdCallMe but it doesn't change 
     cmdP2CallMe.Visibility = ViewStates.Gone; 
     // show confirm elements 
     // this appears as expected 
     lblConfirm.Visibility = ViewStates.Visible; 
     // the following 2 buttons should appear, but don't 
     cmdOk.Visibility = ViewStates.Visible; 
     cmdCancel.Visibility = ViewStates.Visible; 

AXML :

<?xml version="1.0" encoding="utf-8"?> 
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android" 
    android:orientation="vertical" 
    android:layout_width="match_parent" 
    android:layout_height="match_parent"> 
    <TextView 
     android:text="Status: EN-ROUTE" 
     android:textAppearance="?android:attr/textAppearanceLarge" 
     android:layout_width="match_parent" 
     android:layout_height="wrap_content" 
     android:id="@+id/lblP2Status" 
     android:gravity="center" /> 
    <TextView 
     android:text="00:00:00" 
     android:textAppearance="?android:attr/textAppearanceLarge" 
     android:layout_width="match_parent" 
     android:layout_height="wrap_content" 
     android:id="@+id/lblP2Timer" 
     android:gravity="center" 
     android:layout_marginBottom="19.0dp" /> 
    <Button 
     android:text="Update" 
     android:layout_width="match_parent" 
     android:layout_height="64.5dp" 
     android:id="@+id/cmdP2Update" 
     android:layout_marginBottom="10.5dp" 
     android:background="@android:color/holo_green_dark" /> 
    <Button 
     android:text="ARRIVED" 
     android:layout_width="match_parent" 
     android:layout_height="64.5dp" 
     android:id="@+id/cmdP2Arrived" /> 
    <Button 
     android:text="SELF DEPLOYED" 
     android:layout_width="match_parent" 
     android:layout_height="64.5dp" 
     android:id="@+id/cmdP2SelfDeployed" 
     android:layout_marginBottom="10.5dp" /> 
    <Button 
     android:text="CALL ME" 
     android:layout_width="match_parent" 
     android:layout_height="64.5dp" 
     android:id="@+id/cmdP2CallMe" 
     android:layout_marginTop="0.0dp" /> 
    <TextView 
     android:text="Are you sure?" 
     android:textAppearance="?android:attr/textAppearanceLarge" 
     android:layout_width="match_parent" 
     android:layout_height="wrap_content" 
     android:id="@+id/lblP2Confirm" 
     android:gravity="center" 
     android:layout_marginBottom="16.0dp" 
     android:visibility="gone" /> 
    <LinearLayout 
     android:orientation="horizontal" 
     android:minWidth="25px" 
     android:minHeight="25px" 
     android:layout_width="match_parent" 
     android:layout_height="wrap_content" 
     android:id="@+id/linearLayout1"> 
     <Button 
      android:text="OK" 
      android:layout_width="190dp" 
      android:layout_height="wrap_content" 
      android:id="@+id/cmdOk" 
      android:visibility="gone" /> 
     <Button 
      android:text="Cancel" 
      android:layout_width="190dp" 
      android:layout_height="wrap_content" 
      android:id="@+id/cmdCancel" 
      android:visibility="gone" /> 
    </LinearLayout> 
</LinearLayout> 

내가 기대하는 것처럼 할당 된 모든 값을 단계별로합니다. 요소 가시성이 항상 이것을 반영하지 않는 이유는 무엇인지 알 수 없습니다. 코드에서

Answer 1

봐 :

cmdP2CallMe = FindViewById<Button>(Resource.Id.cmdP2CallMe); 

    cmdOk = FindViewById<Button>(Resource.Id.cmdP2CallMe); <-- reference error here 
    cmdCancel = FindViewById<Button>(Resource.Id.cmdP2CallMe);<-- reference error here 

: