擴展shadowbuilder在Monodroid中有編譯錯誤

Question

我想擴展ShadowBuilder以便在拖動時更改畫布大小。但是，由於下面的編譯錯誤，我無法編譯它。

下面的代碼到我的ShadowBuilder

public class TileShadow : View.DragShadowBuilder 
{ 
    //private Drawable mShadow; 

    public TileShadow() 
    { 
    } 

    public TileShadow(View view) 
     : base(view) 
    { 
    } 

    protected TileShadow(IntPtr javaReference, JniHandleOwnership transfer) : base(javaReference, transfer) 
    { 
    } 

    public override void OnDrawShadow(Canvas canvas) 
    { 
     canvas.Scale(1.8f, 1.8f); 
     base.OnDrawShadow(canvas); 
     //mShadow.Draw(canvas); 
     //View.Draw(canvas); 
    } 
} 

錯誤25找不到符號 符號：類DragShadowBuilder 位置：類android.view.View 擴展android.view.View.DragShadowBuilder

Answer 1

你定位了什麼API級別？ DragShadowBuilder可在11級起。

我在Mono上測試了您的代碼，針對API Level 12（安裝了最低級別的Android 3.1）的Android 4.2.6，它編譯時沒有問題並且部署到模擬器。

您是否嘗試過清潔/重建解決方案？

您是否嘗試過從頭開始創建一個新項目並實施此類來查看問題是否與您現有的解決方案分離？

此外，請檢查您的ACW在obj \ debug \ android \ src \ wordshuffle \ android \ shadowbuilders \文件夾中的樣子。

礦看起來像這樣

package androidapplication1; 


public class TileShadow 
    extends android.view.View.DragShadowBuilder 
    implements 
     mono.android.IGCUserPeer 
    { 
    static final String __md_methods; 
    static { 
     __md_methods = 
      "n_onDrawShadow:(Landroid/graphics/Canvas;)V:GetOnDrawShadow_Landroid_graphics_Canvas_Handler\n" + 
      ""; 
     mono.android.Runtime.register ("AndroidApplication1.TileShadow, AndroidApplication1, Version=1.0.0.0, Culture=neutral, PublicKeyToken=null", TileShadow.class, __md_methods); 
    } 


    public TileShadow (android.view.View p0) 
    { 
     super (p0); 
     if (getClass() == TileShadow.class) 
      mono.android.TypeManager.Activate ("AndroidApplication1.TileShadow, AndroidApplication1, Version=1.0.0.0, Culture=neutral, PublicKeyToken=null", "Android.Views.View, Mono.Android, Version=0.0.0.0, Culture=neutral, PublicKeyToken=c4c4237547e4b6cd", this, new java.lang.Object[] { p0 }); 
    } 


    public TileShadow() 
    { 
     super(); 
     if (getClass() == TileShadow.class) 
      mono.android.TypeManager.Activate ("AndroidApplication1.TileShadow, AndroidApplication1, Version=1.0.0.0, Culture=neutral, PublicKeyToken=null", "", this, new java.lang.Object[] { }); 
    } 


    public void onDrawShadow (android.graphics.Canvas p0) 
    { 
     n_onDrawShadow (p0); 
    } 

    private native void n_onDrawShadow (android.graphics.Canvas p0); 

    java.util.ArrayList refList; 
    public void monodroidAddReference (java.lang.Object obj) 
    { 
     if (refList == null) 
      refList = new java.util.ArrayList(); 
     refList.add (obj); 
    } 

    public void monodroidClearReferences() 
    { 
     if (refList != null) 
      refList.clear(); 
    } 
}