垂直的SeekBar

在Android中由于默认的SeekBar是水平样式的，所以垂直的样式需要通过自定义来确定样式。首先上自定义的代码

public class VerticalSeekBar extends SeekBar {    private SeekBar.OnSeekBarChangeListener mOnSeekBarChangeListener;    int i=0;    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);    }    public void setOnSeekBarChangeListener(SeekBar.OnSeekBarChangeListener l) {        mOnSeekBarChangeListener = l;    }    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) {        //将SeekBar转转90度        c.rotate(-90);        //将旋转后的视图移动回来        c.translate(-getHeight(),0);        Log.i("getHeight()",getHeight()+"");        super.onDraw(c);    }    void onStartTrackingTouch() {        if (mOnSeekBarChangeListener != null) {            mOnSeekBarChangeListener.onStartTrackingTouch(this);        }    }    void onProgressChanged() {        if (mOnSeekBarChangeListener != null) {            mOnSeekBarChangeListener.onProgressChanged(this,i,true);        }    }    void onStopTrackingTouch() {        if (mOnSeekBarChangeListener != null) {            mOnSeekBarChangeListener.onStopTrackingTouch(this);        }    }    @Override    public boolean onTouchEvent(MotionEvent event) {        if (!isEnabled()) {            return false;        }        switch (event.getAction()) {            case MotionEvent.ACTION_DOWN:                onStartTrackingTouch();                break;            case MotionEvent.ACTION_MOVE:                //获取滑动的距离                i=getMax() - (int) (getMax() * event.getY() / getHeight());                //设置进度                setProgress(i);                Log.i("Progress",getProgress()+"");                //每次拖动SeekBar都会调用                onSizeChanged(getWidth(), getHeight(), 0, 0);                Log.i("getWidth()",getWidth()+"");                Log.i("getHeight()",getHeight()+"");                onProgressChanged();                break;            case MotionEvent.ACTION_UP:                onStopTrackingTouch();                break;            case MotionEvent.ACTION_CANCEL:                onStopTrackingTouch();                break;        }        return true;    }}

接下来在xml中引用自定义文件就可以了

由于有时候需要自己更改SeekBar的背景，所以要在Drawable创建文件更改背景

更多相关文章

随机推荐