滑动时图片不加载，滑动停止时图片加载

Glide暂停加载:
Glide.with(context).pauseRequests();

Glide恢复加载:
Glide.with(context).resumeRequests();

配合RecyclerView使用, 只需监听滑动状态的变化

        @Override  
        public void onScrollStateChanged(RecyclerView recyclerView, int newState) {  
            super.onScrollStateChanged(recyclerView, newState);  
            switch (newState){  
                case SCROLL_STATE_IDLE: // The RecyclerView is not currently scrolling.  
                    //当屏幕停止滚动，加载图片  
                    try {  
                        if(getContext() != ) Glide.with(getContext()).resumeRequests();  
                    }  
                    catch (Exception e) {  
                        e.printStackTrace();  
                    }  
                    break;  
                case SCROLL_STATE_DRAGGING: // The RecyclerView is currently being dragged by outside input such as user touch input.  
                    //当屏幕滚动且用户使用的触碰或手指还在屏幕上，停止加载图片  
                    try {  
                        if(getContext() != ) Glide.with(getContext()).pauseRequests();  
                    }  
                    catch (Exception e) {  
                        e.printStackTrace();  
                    }  
                    break;  
                case SCROLL_STATE_SETTLING: // The RecyclerView is currently animating to a final position while not under outside control.  
                    //由于用户的操作，屏幕产生惯性滑动，停止加载图片  
                    try {  
                        if(getContext() != ) Glide.with(getContext()).pauseRequests();  
                    }  
                    catch (Exception e) {  
                        e.printStackTrace();  
                    }  
                    break;  
            }  
        }