android:java.lang.Object[]无法强制转换为android.widget.Button[] 声明： 检查所有充气点 问题:

我想获得屏幕上所有点的x和y坐标

但是logcat报告java.lang.Object[]不能强制转换为android.widget.Button[]。如何纠正错误？谢谢

           apple_shown = (Button[]) spots.toArray(); //LINE 684

苹果显示->类型按钮

点->类型队列

---

您正在尝试在按钮上投射斑点。这是不可能的

我已经做了更多的研究，它似乎是这样工作的：

   public void Check_all_Spot(int BOY_X)
   {  
       int [] lowest_x;
       int [] lowest_y;
       int apple_shown_length =spots.size();
       Button [] apple_shown = null; 

       String text_x ="";
       String text_y = "";

       if (!spots.isEmpty())
       {
           apple_shown = spots.toArray(new Button[apple_shown_length]);
       }

  public void Check_all_Spot(int BOY_X)
   {  
       int [] lowest_x;
       int [] lowest_y;
       int apple_shown_length =0;
       Button [] apple_shown; 

       String text_x ="";
       String text_y = "";

       if (!spots.isEmpty())
       {
           apple_shown = (Button[]) spots.toArray(); //LINE 684
           apple_shown_length = apple_shown.length;
       }

       lowest_x =  new int [apple_shown_length];
       lowest_y =  new int [apple_shown_length];
       apple_shown =  new Button [apple_shown_length];

       for (int w = 0; w < apple_shown_length ; ++w)
       {
           lowest_x[w] = (int) apple_shown[w].getX();
           lowest_y[w] = (int) apple_shown[w].getY();              
           text_x = text_x+ lowest_x[w];
           text_y = text_y+ lowest_y[w];            
       }

       image_boy.setText("lowest spot\n"+text_x+"\n"+text_y);
   }

12-01 00:57:12.760: E/AndroidRuntime(14706): FATAL EXCEPTION: main
12-01 00:57:12.760: E/AndroidRuntime(14706): java.lang.ClassCastException: java.lang.Object[] cannot be cast to android.widget.Button[]
12-01 00:57:12.760: E/AndroidRuntime(14706):    at com.abc.abc.Game_collecting_view.Check_all_Spot(Game_collecting_view.java:684)
12-01 00:57:12.760: E/AndroidRuntime(14706):    at com.abc.abc.Game_collecting_view.Increment(Game_collecting_view.java:777)
12-01 00:57:12.760: E/AndroidRuntime(14706):    at com.abc.abc.Game_collecting_view$RptUpdater.run(Game_collecting_view.java:754)
12-01 00:57:12.760: E/AndroidRuntime(14706):    at android.os.Handler.handleCallback(Handler.java:615)
12-01 00:57:12.760: E/AndroidRuntime(14706):    at android.os.Handler.dispatchMessage(Handler.java:92)
12-01 00:57:12.760: E/AndroidRuntime(14706):    at android.os.Looper.loop(Looper.java:137)
12-01 00:57:12.760: E/AndroidRuntime(14706):    at android.app.ActivityThread.main(ActivityThread.java:4898)
12-01 00:57:12.760: E/AndroidRuntime(14706):    at java.lang.reflect.Method.invokeNative(Native Method)
12-01 00:57:12.760: E/AndroidRuntime(14706):    at java.lang.reflect.Method.invoke(Method.java:511)
12-01 00:57:12.760: E/AndroidRuntime(14706):    at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:1008)
12-01 00:57:12.760: E/AndroidRuntime(14706):    at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:775)
12-01 00:57:12.760: E/AndroidRuntime(14706):    at dalvik.system.NativeStart.main(Native Method)

           apple_shown = (Button[]) spots.toArray(); //LINE 684

   public void Check_all_Spot(int BOY_X)
   {  
       int [] lowest_x;
       int [] lowest_y;
       int apple_shown_length =spots.size();
       Button [] apple_shown = null; 

       String text_x ="";
       String text_y = "";

       if (!spots.isEmpty())
       {
           apple_shown = spots.toArray(new Button[apple_shown_length]);
       }