如何爲動態創建的視圖設置OnTouchListener？

Question

我有兩個佈局，一個LinearLayout和一個RelativeLayout。在LinearLayout我有10個圖像。當我點擊一張圖片時，它會被添加到RelativeLayout。所有10幅圖像都有類似的事件。在RelativeLayout中，我已將OnTouchListener設置爲從LinearLayout添加的ImageView。但我的問題是，onTouch只適用於最近添加的ImageView，但當我嘗試觸摸以前添加的圖像時，它不起作用。我想爲在相對佈局中添加的所有圖像添加偵聽器。

下面是我到目前爲止已經試過：

for(int i = 0; i < data.length; i++){ 
      image[i] = new ImageView(getApplicationContext()); 
      try{ 
       // int imgID = getResources().getIdentifier(data[i], null, getPackageName()); 
       image[i].setImageResource(data[i]); 

      }catch(Exception e){ 
       int imgID = getResources().getIdentifier("nia", "drawable", "package"); 
       image[i].setImageResource(imgID); 
      }   
      LinearLayout.LayoutParams LEye = new LinearLayout.LayoutParams(
        100 , 70); 
      LEye.leftMargin=20; 
      image[i].setLayoutParams(LEye); 
      shapeImageContainer.addView(image[i]); //shapeImageContainer is the Linear Layout 
      final int c=i; 
      image[i].setOnClickListener(new OnClickListener() { 

       @Override 
       public void onClick(View v) { 
        // TODO Auto-generated method stub 

        //addContentView(addIcon(), new RelativeLayout.LayoutParams(LayoutParams.WRAP_CONTENT, LayoutParams.WRAP_CONTENT)); 
        Toast.makeText(NewProject.this, "Position "+c, Toast.LENGTH_SHORT).show(); 

        rootView.addView(addIcon(c)); //rootView is the Relative layout 

       } 
      }); 

      //image[i].setOnTouchListener(MyOnTouchListener); 

     } 


private ImageView addIcon(int c){ 
     item = new ImageView(this); 
     item.setImageResource(data[c]); 
     item.setAdjustViewBounds(true); 
     RelativeLayout.LayoutParams params = new RelativeLayout.LayoutParams(100, 60); 
     if(mIconIdCounter != 1){ 
      params.addRule(RelativeLayout.RIGHT_OF,c-1); 
     } 
     item.setLayoutParams(params); 
     item.setId(mIconIdCounter); 
     ++mIconIdCounter; 
     item.setOnTouchListener(MyOnTouchListener); 
     return item; 
    } 

    OnTouchListener MyOnTouchListener = new OnTouchListener() { 

     @Override 
     public boolean onTouch(View v, MotionEvent event) { 
      // TODO Auto-generated method stub 
//   scroll.setEnabled(false); 
//   horizontal.setEnabled(false); 

//   scroll.setVisibility(View.GONE); 
//   horizontal.setVisibility(View.GONE); 
     RelativeLayout.LayoutParams layoutParams2 = (RelativeLayout.LayoutParams) item.getLayoutParams(); 
       switch(event.getActionMasked()) 
       { 

        case MotionEvent.ACTION_MOVE: 
         scroll.requestDisallowInterceptTouchEvent(true); 
         horizontal.requestDisallowInterceptTouchEvent(true); 
         int x_cord = (int) event.getRawX(); 
         int y_cord = (int) event.getRawY(); 

         //right margin 
         if (x_cord > windowwidth) { 
          x_cord = windowwidth-10; 
         } 

         // left margin original 
         if (x_cord <68) { 
          x_cord = 68; 
         } 
         // left margin original 
         if (y_cord <68) { 
          y_cord = 68; 
         } 
         if (y_cord > windowheight) { 
          y_cord = windowheight-10; 
         } 

         // tv.setText(String.valueOf(y_cord)); 
         layoutParams2.leftMargin = x_cord -60; 
         layoutParams2.topMargin = y_cord -65; 
         item.setLayoutParams(layoutParams2); 
         break; 
        default: 
         break; 
       } 
      return true; 
     } 

    }; 

Answer 1

但我的問題是，onTouch只適用於它最近添加 的ImageView的，但是當我嘗試觸摸先前添加的圖像，它 不起作用。

這是因爲在OnTouchListener使用item領域做的，而不是使用其監聽被稱爲View你的工作（這將始終指向添加爲你寫的代碼的最後ImageView）。嘗試這樣的：

RelativeLayout.LayoutParams layoutParams2 = (RelativeLayout.LayoutParams) v.getLayoutParams(); 
// rest of the onTouch callback... 
v.setLayoutParams(layoutParams2);