拖放（如果我拖動右側圖像，則選中複選框）android

如果我拖動countryTypical圖像並放入imageCountry [n9]，應用程序會在正確的countryTypical圖像上設置複選標記圖像。它發生，如果我拖動正確的國家典型圖像，也如果我拖動錯誤countryTypical圖像。我想糾正錯誤。非常感謝......拖放（如果我拖動右側圖像，則選中複選框）android

String[] countryNames = { 
     "Italy", "France", "Spain", "Germany", "Belgium", "Portugal", "Switzerland", "Great Britain" 
}; 

int[] countryImages = { 
     R.drawable.italy, 
     R.drawable.france, 
     R.drawable.spain,... 
}; 
int[] countryFlags = { 
     R.drawable.italian_flag, 
     R.drawable.french_flag, 
     R.drawable.spanish_flag,.... 
};

在我的OnCreate：

countryTypical1.setImageResource(countryFlags[n1]); 
    countryTypical2.setImageResource(countryFlags[n2]); 
    countryTypical3.setImageResource(countryFlags[n3]); 
    countryTypical4.setImageResource(countryFlags[n4]); 
    countryTypical5.setImageResource(countryFlags[n5]); 
    countryTypical6.setImageResource(countryFlags[n6]); 
    countryTypical7.setImageResource(countryFlags[n7]); 
    countryTypical8.setImageResource(countryFlags[n8]); 

    countryTypical1.setOnTouchListener(dragClick); 
    countryTypical2.setOnTouchListener(dragClick); 
    countryTypical3.setOnTouchListener(dragClick); 
    countryTypical4.setOnTouchListener(dragClick); 
    countryTypical5.setOnTouchListener(dragClick); 
    countryTypical6.setOnTouchListener(dragClick); 
    countryTypical7.setOnTouchListener(dragClick); 
    countryTypical8.setOnTouchListener(dragClick); 

    imageCountry.setOnDragListener(DropListener);

View.OnTouchListener dragClick =新View.OnTouchListener（）{

public boolean onTouch(View view, MotionEvent event) { 
     if (event.getAction() == MotionEvent.ACTION_MOVE) { 
      DragShadow dragShadow = new DragShadow(view); 

      ClipData dragData = ClipData.newPlainText("", ""); 
      view.startDrag(dragData, dragShadow, view,0); 
      return true; 
     } 
     return true; 
    } 
}; 



private class DragShadow extends View.DragShadowBuilder{ 

    public DragShadow(View view) { 
     super(view); 
    } 
    @Override 
    public void onProvideShadowMetrics(Point shadowSize, Point shadowTouchPoint) { 
     View view = getView(); 
     int height = view.getHeight(); 
     int width = view.getWidth(); 

     shadowSize.set(width, height); 
     shadowTouchPoint.set(width, height); 
    } 

    @Override 
    public void onDrawShadow(Canvas canvas) { 
     getView().draw(canvas); 
    } 
} 


View.OnDragListener DropListener = new View.OnDragListener() { 

    @Override 
    public boolean onDrag(View view, DragEvent event) { 
     assignDropTrue(countryTypical1, event, n1); 
     assignDropTrue(countryTypical2, event, n2); 
     assignDropTrue(countryTypical3, event, n3); 
     assignDropTrue(countryTypical4, event, n4); 
     assignDropTrue(countryTypical5, event, n5); 
     assignDropTrue(countryTypical6, event, n6); 
     assignDropTrue(countryTypical7, event, n7); 
     assignDropTrue(countryTypical8, event, n8); 
     return true; 
    } 

}; 



private void assignDropTrue(ImageView countryTypical, DragEvent event, int n1){ 
    if (n9 == n1){ 
     int dragEvent = event.getAction(); 
     switch (dragEvent) { 
      case DragEvent.ACTION_DROP: 
       countryTypical.setImageResource(R.drawable.vcheckmark); 
     }} 
}

來源

2016-02-26 Carlo

'if（n9 == n1）'，你的情況是什麼n9？ – Sevle

n9 = r.nextInt（countryFlags.length）; – Carlo

問題出現在開關箱中，如果您使用正確的映射刪除映像，您必須檢查DragEvent.ACTION_DROP情況。我無法進一步幫助，因爲我不太瞭解你的代碼的所有方面。（例如，什麼是n1-n8？0-7之間的整數？） – Sevle

我寫了一個樣本只給你是我提出的邏輯背後的想法（也就是說沒有經過測試）

View.OnDragListener DropListener = new View.OnDragListener() { 
     @Override 
     public boolean onDrag(View view, DragEvent event) { 
      int action = event.getAction(); 
      View draggedView = (View) event.getLocalState(); 
      //view is the country where the flag was dropped, draggedView is the flag you dropped 
      //below we check if the correct flag is dropped in the correct country 

     switch (event.getAction()){ 
     case DragEvent.ACTION_DROP: 
      for (int i; i< countryImages.length(); i++){ 
       if (draggedView.getId() == countryFlags[i] && view.getId()== countryImages[i]) 
        draggedView.setImageResource(R.drawable.vcheckmark); 

      }    
      break; 
     default: 
      break; 
     } 
     return true; 
     } 
    };

來源

2016-02-26 13:00:17 Sevle

拖放（如果我拖動右側圖像，則選中複選框）android

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