Android SeekBar默认是水平样式的,但是可以通过自定义SeekBar来实现垂直样式。可以通过设置SeekBar的旋转角度或者使用自定义控件来实现垂直SeekBar。具体实现方式可以参考以下步骤:
SeekBar seekBar = findViewById(R.id.seekBar);
seekBar.setRotation(90);
public class VerticalSeekBar extends SeekBar {
public VerticalSeekBar(Context context) {
super(context);
}
public VerticalSeekBar(Context context, AttributeSet attrs) {
super(context, attrs);
}
public VerticalSeekBar(Context context, AttributeSet attrs, int defStyle) {
super(context, attrs, defStyle);
}
@Override
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());
}
@Override
protected synchronized void onDraw(Canvas canvas) {
canvas.rotate(-90);
canvas.translate(-getHeight(), 0);
super.onDraw(canvas);
}
@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:
setProgress(getMax() - (int) (getMax() * event.getY() / getHeight()));
onSizeChanged(getWidth(), getHeight(), 0, 0);
break;
}
return true;
}
}
使用自定义的VerticalSeekBar控件:
<com.example.VerticalSeekBar
android:id="@+id/verticalSeekBar"
android:layout_width="wrap_content"
android:layout_height="match_parent" />