[Résolu] Glisser les événements dans un écouteur

mDragListen = new myDragEventListener();

View imageView = new ImageView(this);

// Sets the drag event listener for the View
imageView.setOnDragListener(mDragListen);

...

protected class myDragEventListener implements View.OnDragEventListener {

    // This is the method that the system calls when it dispatches a drag event to the
    // listener.
    public boolean onDrag(View v, DragEvent event) {

        // Defines a variable to store the action type for the incoming event
        final int action = event.getAction();

        // Handles each of the expected events
        switch(action) {

            case DragEvent.ACTION_DRAG_STARTED:

                // Determines if this View can accept the dragged data
                if (event.getClipDescription().hasMimeType(ClipDescription.MIMETYPE_TEXT_PLAIN)) {

                    // As an example of what your application might do,
                    // applies a blue color tint to the View to indicate that it can accept
                    // data.
                    v.setColorFilter(Color.BLUE);

                    // Invalidate the view to force a redraw in the new tint
                    v.invalidate();

                    // returns true to indicate that the View can accept the dragged data.
                    return(true);

                    } else {

                    // Returns false. During the current drag and drop operation, this View will
                    // not receive events again until ACTION_DRAG_ENDED is sent.
                    return(false);

                    }
                break;

            case DragEvent.ACTION_DRAG_ENTERED: {

                // Applies a green tint to the View. Return true; the return value is ignored.

                v.setColorFilter(Color.GREEN);

                // Invalidate the view to force a redraw in the new tint
                v.invalidate();

                return(true);

                break;

                case DragEvent.ACTION_DRAG_LOCATION:

                // Ignore the event
                    return(true);

                break;

                case DragEvent.ACTION_DRAG_EXITED:

                    // Re-sets the color tint to blue. Returns true; the return value is ignored.
                    v.setColorFilter(Color.BLUE);

                    // Invalidate the view to force a redraw in the new tint
                    v.invalidate();

                    return(true);

                break;

                case DragEvent.ACTION_DROP:

                    // Gets the item containing the dragged data
                    ClipData.Item item = event.getClipData().getItemAt(0);

                    // Gets the text data from the item.
                    dragData = item.getText();

                    // Displays a message containing the dragged data.
                    Toast.makeText(this, "Dragged data is " + dragData, Toast.LENGTH_LONG);

                    // Turns off any color tints
                    v.clearColorFilter();

                    // Invalidates the view to force a redraw
                    v.invalidate();

                    // Returns true. DragEvent.getResult() will return true.
                    return(true);

                break;

                case DragEvent.ACTION_DRAG_ENDED:

                    // Turns off any color tinting
                    v.clearColorFilter();

                    // Invalidates the view to force a redraw
                    v.invalidate();

                    // Does a getResult(), and displays what happened.
                    if (event.getResult()) {
                        Toast.makeText(this, "The drop was handled.", Toast.LENGTH_LONG);

                    } else {
                        Toast.makeText(this, "The drop didn't work.", Toast.LENGTH_LONG);

                    };

                    // returns true; the value is ignored.
                    return(true);

                break;

                // An unknown action type was received.
                default:
                    Log.e("DragDrop Example","Unknown action type received by OnDragListener.");

                break;
        };
    };
};