按以前写作方式，首先上效果图：

具体实现方式是继续SeekBar,重写onDraw方法只要旋转90度就可以实现。

给出以上两个其中的一个代码：

package android.widget;

import android.content.Context;
import android.graphics.Canvas;
import android.util.AttributeSet;
import android.util.Log;
import android.view.MotionEvent;

public class VerticalSeekBar extendsSeekBar {

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

public VerticalSeekBar(Context context, AttributeSet attrs, intdefStyle) {
super(context, attrs, defStyle);
}

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

protected void onSizeChanged(int w, int h, int oldw, int oldh) {
super.onSizeChanged(h, w, oldh, oldw);
}

@Override
protected synchronized void onMeasure(int widthMeasureSpec, intheightMeasureSpec) {
super.onMeasure(heightMeasureSpec, widthMeasureSpec);
setMeasuredDimension(getMeasuredHeight(), getMeasuredWidth());
}

protected void onDraw(Canvas c) {
c.rotate(-90);
c.translate(-getHeight(),0);

super.onDraw(c);
}

@Override
public boolean onTouchEvent(MotionEvent event) {
if (!isEnabled()) {
return false;
}

switch (event.getAction()) {
case MotionEvent.ACTION_DOWN:
case MotionEvent.ACTION_MOVE:
case MotionEvent.ACTION_UP:
int i=0;
i=getMax() - (int)(getMax() * event.getY() / getHeight());
setProgress(i);
Log.i("Progress",getProgress()+"");
onSizeChanged(getWidth(),getHeight(), 0, 0);
break;

case MotionEvent.ACTION_CANCEL:
break;
}
return true;
}

}