Android的阻力观点平稳 [英] android drag view smooth

问题描述

我要拖动屏幕上的一些看法。我从触摸听者的ACTION_MOVE改变左侧和顶部的布局参数从动态事件改变自己的立场。有没有一种方法，以拖的项目更加顺畅？因为那朵样的拖的不顺利在所有...这里是code

 公共布尔onTouch（查看视图，MotionEvent motionEvent）{
    开关（motionEvent.getAction（））{
        案例MotionEvent.ACTION_DOWN：
            DX =（int）的motionEvent.getX（）;
            DY =（INT）motionEvent.getY（）;
            打破;

        案例MotionEvent.ACTION_MOVE：
            INT X =（int）的motionEvent.getX（）;
            INT Y =（INT）motionEvent.getY（）;
            RelativeLayout.LayoutParams LP =（RelativeLayout.LayoutParams）view.getLayoutParams（）;
            INT左= lp.leftMargin +（X  -  DX）;
            INT顶部= lp.topMargin +（Y  -  DY）;
            lp.leftMargin =左;
            lp.topMargin =顶部;
            view.setLayoutParams（LP）;
            打破;
    }
    返回true;
}
 

解决方案

而不是和的getY的getX尝试使用motionEvent.getRawX（）和motionEvent.getRawY（）

I have to drag some views on screen. I am modifying their position by changing left and top of their layout parameters from motion event on ACTION_MOVE from touch listener. Is there a way to "drag" items more smooth? Because tis kind of "dragging" is no smooth at all... Here is the code

public boolean onTouch(View view, MotionEvent motionEvent) {
    switch (motionEvent.getAction()) {
        case MotionEvent.ACTION_DOWN:
            dx = (int) motionEvent.getX();
            dy = (int) motionEvent.getY();
            break;

        case MotionEvent.ACTION_MOVE:
            int x = (int) motionEvent.getX();
            int y = (int) motionEvent.getY();
            RelativeLayout.LayoutParams lp = (RelativeLayout.LayoutParams) view.getLayoutParams();
            int left = lp.leftMargin + (x - dx);
            int top = lp.topMargin + (y - dy);
            lp.leftMargin = left;
            lp.topMargin = top;
            view.setLayoutParams(lp);
            break;
    }
    return true;
}

解决方案

Try to use motionEvent.getRawX() and motionEvent.getRawY() instead of getY and getX

这篇关于Android的阻力观点平稳的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！