Попробуйте это
import android.content.Context;
import android.graphics.Canvas;
import android.support.annotation.NonNull;
import android.util.AttributeSet;
import android.view.MotionEvent;
import android.widget.SeekBar;
/**
* Implementation of an easy vertical SeekBar, based on the normal SeekBar.
*/
public class VerticalSeekBar extends SeekBar {
/**
* The angle by which the SeekBar view should be rotated.
*/
private static final int ROTATION_ANGLE = -90;
/**
* A change listener registrating start and stop of tracking. Need an own listener because the listener in SeekBar
* is private.
*/
private OnSeekBarChangeListener mOnSeekBarChangeListener;
/**
* Standard constructor to be implemented for all views.
*
* @param context The Context the view is running in, through which it can access the current theme, resources, etc.
* @see android.view.View#View(Context)
*/
public VerticalSeekBar(final Context context) {
super(context);
}
/**
* Standard constructor to be implemented for all views.
*
* @param context The Context the view is running in, through which it can access the current theme, resources, etc.
* @param attrs The attributes of the XML tag that is inflating the view.
* @see android.view.View#View(Context, AttributeSet)
*/
public VerticalSeekBar(final Context context, final AttributeSet attrs) {
super(context, attrs);
}
/**
* Standard constructor to be implemented for all views.
*
* @param context The Context the view is running in, through which it can access the current theme, resources, etc.
* @param attrs The attributes of the XML tag that is inflating the view.
* @param defStyle An attribute in the current theme that contains a reference to a style resource that supplies default
* values for the view. Can be 0 to not look for defaults.
* @see android.view.View#View(Context, AttributeSet, int)
*/
public VerticalSeekBar(final Context context, final AttributeSet attrs, final int defStyle) {
super(context, attrs, defStyle);
}
/*
* (non-Javadoc) ${see_to_overridden}
*/
@Override
protected final void onSizeChanged(final int width, final int height, final int oldWidth, final int oldHeight) {
super.onSizeChanged(height, width, oldHeight, oldWidth);
}
/*
* (non-Javadoc) ${see_to_overridden}
*/
@Override
protected final synchronized void onMeasure(final int widthMeasureSpec, final int heightMeasureSpec) {
super.onMeasure(heightMeasureSpec, widthMeasureSpec);
setMeasuredDimension(getMeasuredHeight(), getMeasuredWidth());
}
/*
* (non-Javadoc) ${see_to_overridden}
*/
@Override
protected final void onDraw(@NonNull final Canvas c) {
c.rotate(ROTATION_ANGLE);
c.translate(-getHeight(), 0);
super.onDraw(c);
}
/*
* (non-Javadoc) ${see_to_overridden}
*/
@Override
public final void setOnSeekBarChangeListener(final OnSeekBarChangeListener listener) {
// Do not use super for the listener, as this would not set the fromUser flag properly
mOnSeekBarChangeListener = listener;
}
/*
* (non-Javadoc) ${see_to_overridden}
*/
@Override
public final boolean onTouchEvent(@NonNull final MotionEvent event) {
if (!isEnabled()) {
return false;
}
switch (event.getAction()) {
case MotionEvent.ACTION_DOWN:
setProgressInternally(getMax() - (int) (getMax() * event.getY() / getHeight()), true);
if (mOnSeekBarChangeListener != null) {
mOnSeekBarChangeListener.onStartTrackingTouch(this);
}
break;
case MotionEvent.ACTION_MOVE:
setProgressInternally(getMax() - (int) (getMax() * event.getY() / getHeight()), true);
break;
case MotionEvent.ACTION_UP:
setProgressInternally(getMax() - (int) (getMax() * event.getY() / getHeight()), true);
if (mOnSeekBarChangeListener != null) {
mOnSeekBarChangeListener.onStopTrackingTouch(this);
}
break;
case MotionEvent.ACTION_CANCEL:
if (mOnSeekBarChangeListener != null) {
mOnSeekBarChangeListener.onStopTrackingTouch(this);
}
break;
default:
break;
}
return true;
}
/**
* Set the progress by the user. (Unfortunately, Seekbar.setProgressInternally(int, boolean) is not accessible.)
*
* @param progress the progress.
* @param fromUser flag indicating if the change was done by the user.
*/
public final void setProgressInternally(final int progress, final boolean fromUser) {
if (progress != getProgress()) {
super.setProgress(progress);
if (mOnSeekBarChangeListener != null) {
mOnSeekBarChangeListener.onProgressChanged(this, progress, fromUser);
}
}
onSizeChanged(getWidth(), getHeight(), 0, 0);
}
/*
* (non-Javadoc) ${see_to_overridden}
*/
@Override
public final void setProgress(final int progress) {
setProgressInternally(progress, false);
}
}