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  • 冲刺1

    内容:

      1.确认了用户在MYSQL数据库中的储存结构

      2.将UI原型中的占位符替换成实体

      3.完成了公告栏的制作

    公告栏功能:

      1.当用户鼠标向左向右滑动时,公告栏的图片也会随着滑向前一张或后一张

      2.每隔五秒将自动跳转到下一张

    难点:

      如何让程序每个五秒执行一段代码

    程序实现:

      控制时间

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    handler = new Handler() {
                @Override
                public void handleMessage(Message msg) {
                    super.handleMessage(msg);
                    if (msg.what == 0) {
                        if(index==num-1){
                            is.setImageResource(gonggao[0]);
                            index=0;
                            Log.d("MainActivity", "1");
                        }else{
                            is.setImageResource(gonggao[index+1]);
                            index++;
                            Log.d("MainActivity", "2");
                        }
                        Log.d("MainActivity", "123456");
                    }
                }
            };
     
            new Timer().schedule(new TimerTask() {
                @Override
                public void run() {
                    // (1) 使用handler发送消息
                    Message message=new Message();
                    message.what=0;
                    handler.sendMessage(message);
                }
            },0,5000);

      控制手指滑动:

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    //触摸监听器.
            is.setOnTouchListener(new View.OnTouchListener() {
                @Override
                public boolean onTouch(View v, MotionEvent event) {
     
                    //判断是否按下
                    if(event.getAction()==MotionEvent.ACTION_DOWN)
                    {
                        touchDownX=event.getX();
                        return true;
                    }else if(event.getAction()==MotionEvent.ACTION_UP){
                        touchUpX=event.getX();
                        //从左向右滑动
                        if(touchUpX-touchDownX>100){
                            index=index==0?gonggao.length-1:index-1;
                            /*在这里放滑动的动画.  */
                            /**/
                            is.setImageResource(gonggao[index]);
                        }else if(touchDownX-touchUpX>100){
                            index=index==gonggao.length-1?0:index+1;
                            /*在这里放滑动的动画.  */
                            /**/
                            is.setImageResource(gonggao[index]);
     
                        }
                        return true;
                    }
     
                    return false;
                }
            });

      

    存在的疑问:

      如何让图片播放平滑滑动的图片?

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  • 原文地址:https://www.cnblogs.com/shunmu/p/12728351.html
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