如何为动态创建的视图设置OnTouchListener？

Question

我有两种布局，一种是LinearLayout，另一种是RelativeLayout。在LinearLayout中，我有10个图片。当我点击其中一张图片时，它会被添加到RelativeLayout中。为所有10个图片提供类似的事件。在RelativeLayout中，我为从LinearLayout添加的ImageView设置了一个OnTouchListener。但我的问题是，onTouch仅适用于最近添加的ImageView，但当我尝试触摸以前添加的图像时，它不起作用。我想为相对布局中添加的所有图像添加侦听器。

以下是我迄今为止尝试过的：

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;
        }

    };

- Spring Breaker

---

请发布您的布局XML文件。 - Nishant Shah

Answer 1

但是我的问题是，onTouch仅适用于最近添加的imageview，当我尝试触摸之前添加的图像时，它无法工作。这是因为在OnTouchListener中，您使用item字段来执行您的工作（它将始终指向最后一个ImageView，因为您编写了代码），而不是使用调用侦听器的View。尝试像这样做：

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

- user