Custon SeekBar (vertical)

Custon SeekBar (vertical)

I need to implement my own Vertical SeekBar. I wrote class and define in XML.
Java class:
package com.example.Radio_KPI.utils;
import android.content.Context;
import android.graphics.Canvas;
import android.util.AttributeSet;
import android.util.Log;
import android.view.MotionEvent;
import android.widget.SeekBar;
public class VerticalSeekBar extends SeekBar {
public VerticalSeekBar(Context context) {
super(context);
}
public VerticalSeekBar(Context context, AttributeSet attrs, int
defStyle) {
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, int
heightMeasureSpec) {
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;
}
}
XML code:
<com.example.Radio_KPI.utils.VerticalSeekBar
android:id="@+id/volume_bar"
android:layout_width="fill_parent"
android:layout_height="wrap_content"
android:progress="0"
android:max="100"
android:progressDrawable="@drawable/progressbar"
android:secondaryProgress="0" />
Error: