Android SeekBar水平翻转

问题描述

使用Android SeekBar，通常可以将拇指向左或向右拖动，黄色进度色在拇指的左侧.我想要完全相反的方法，本质上是将黄色进度色翻转到拇指的右侧，并在y轴上翻转整个SeekBar.

With the Android SeekBar, you can normally drag the thumb to the left or to the right and the yellow progress color is to the left of the thumb. I want the exact opposite, essentially flipping the yellow progress color to the right of the thumb and flipping the entire SeekBar on the y-axis.

有人能指出我正确的方向吗?谢谢！

Can anyone point me in the right direction? Thanks!

推荐答案

在弄懂一些代码之后，这就是我所得到的，并且看起来工作得很好.希望它将对将来的其他人有所帮助.

After fiddling around with some code this is what I got and it seems to work pretty well. Hopefully it will help someone else in the future.

public class ReversedSeekBar extends SeekBar {

    public ReversedSeekBar(Context context) {
        super(context);
    }

    public ReversedSeekBar(Context context, AttributeSet attrs) {
        super(context, attrs);
    }

    public ReversedSeekBar(Context context, AttributeSet attrs, int defStyle) {
        super(context, attrs, defStyle);
    }

    @Override
    protected void onDraw(Canvas canvas) {
        float px = this.getWidth() / 2.0f;
        float py = this.getHeight() / 2.0f;

        canvas.scale(-1, 1, px, py);

        super.onDraw(canvas);
    }

    @Override
    public boolean onTouchEvent(MotionEvent event) {
        event.setLocation(this.getWidth() - event.getX(), event.getY());

        return super.onTouchEvent(event);
    }
}

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这是在以下两个问题的帮助下抛出的:

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This was thrown together with the help of these two questions:

1. 如何显示上方Android中具有textview的文本?
2. 如何在Android中获得可用的垂直SeekBar?

1. How can you display upside down text with a textview in Android?
2. How can I get a working vertical SeekBar in Android?

这篇关于Android SeekBar水平翻转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！