KJDragGridView.java 文件源码

/**
 * 创建拖动的镜像
 *
 * @param bitmap
 * @param downX  按下的点相对父控件的X坐标
 * @param downY  按下的点相对父控件的X坐标
 */
private void createDragImage(Bitmap bitmap, int downX, int downY) {
    mWindowLayoutParams = new WindowManager.LayoutParams();
    mWindowLayoutParams.format = PixelFormat.TRANSLUCENT; // 图片之外的其他地方透明

    mWindowLayoutParams.gravity = Gravity.TOP | Gravity.LEFT;
    mWindowLayoutParams.x = downX - mPoint2ItemLeft + mOffset2Left;
    mWindowLayoutParams.y = downY - mPoint2ItemTop + mOffset2Top
            - mStatusHeight;
    mWindowLayoutParams.alpha = 0.55f; // 透明度

    mWindowLayoutParams.width = WindowManager.LayoutParams.WRAP_CONTENT;
    mWindowLayoutParams.height = WindowManager.LayoutParams.WRAP_CONTENT;
    mWindowLayoutParams.flags = WindowManager.LayoutParams.FLAG_NOT_FOCUSABLE
            | WindowManager.LayoutParams.FLAG_NOT_TOUCHABLE;

    mDragImageView = new ImageView(getContext());
    mDragImageView.setImageBitmap(bitmap);
    mWindowManager.addView(mDragImageView, mWindowLayoutParams);
}