垂直SeekBar:VerticalSeekBar

これは私が見つけた垂直なSeekBarコードです.

public class VerticalSeekBar extends AbsSeekBar {

	private Drawable mThumb;

	public interface OnSeekBarChangeListener {
		void onProgressChanged(VerticalSeekBar VerticalSeekBar, int progress, boolean fromUser);

		void onStartTrackingTouch(VerticalSeekBar VerticalSeekBar);

		void onStopTrackingTouch(VerticalSeekBar VerticalSeekBar);
	}

	private OnSeekBarChangeListener mOnSeekBarChangeListener;

	public VerticalSeekBar(Context context) {
		this(context, null);
	}

	public VerticalSeekBar(Context context, AttributeSet attrs) {
		this(context, attrs, android.R.attr.seekBarStyle);
	}

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

	public void setOnSeekBarChangeListener(OnSeekBarChangeListener l) {
		mOnSeekBarChangeListener = l;
	}

	void onStartTrackingTouch() {
		if (mOnSeekBarChangeListener != null) {
			mOnSeekBarChangeListener.onStartTrackingTouch(this);
		}
	}

	void onStopTrackingTouch() {
		if (mOnSeekBarChangeListener != null) {
			mOnSeekBarChangeListener.onStopTrackingTouch(this);
		}
	}

	void onProgressRefresh(float scale, boolean fromUser) {
		Drawable thumb = mThumb;
		if (thumb != null) {
			setThumbPos(getHeight(), thumb, scale, Integer.MIN_VALUE);
			invalidate();
		}
		if (mOnSeekBarChangeListener != null) {
			mOnSeekBarChangeListener.onProgressChanged(this, getProgress(), isPressed());
		}
	}

	private void setThumbPos(int w, Drawable thumb, float scale, int gap) {
		int available = w - getPaddingLeft() - getPaddingRight();
		int thumbWidth = thumb.getIntrinsicWidth();
		int thumbHeight = thumb.getIntrinsicHeight();
		available -= thumbWidth;

		// The extra space for the thumb to move on the track
		available += getThumbOffset() * 2;

		int thumbPos = (int) (scale * available);

		int topBound, bottomBound;
		if (gap == Integer.MIN_VALUE) {
			Rect oldBounds = thumb.getBounds();
			topBound = oldBounds.top;
			bottomBound = oldBounds.bottom;
		} else {
			topBound = gap;
			bottomBound = gap + thumbHeight;
		}
		thumb.setBounds(thumbPos, topBound, thumbPos + thumbWidth, bottomBound);
	}

	@Override
	protected void onDraw(Canvas c) {
		c.rotate(-90);//   90 ，   SeekBar   
		c.translate(-getHeight(), 0);//          VerticalSeekBar       ,           
		super.onDraw(c);
	}

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

	@Override
	public void setThumb(Drawable thumb) {
		mThumb = thumb;
		super.setThumb(thumb);
	}

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

	//        ，            onStartTrackingTouch()  
	@Override
	public boolean onTouchEvent(MotionEvent event) {
		if (!isEnabled()) {
			return false;
		}
		switch (event.getAction()) {
		case MotionEvent.ACTION_DOWN: {
			setPressed(true);
			onStartTrackingTouch();
			trackTouchEvent(event);
			break;
		}

		case MotionEvent.ACTION_MOVE: {
			trackTouchEvent(event);
			attemptClaimDrag();
			break;
		}

		case MotionEvent.ACTION_UP: {
			trackTouchEvent(event);
			onStopTrackingTouch();
			setPressed(false);
			// ProgressBar doesn't know to repaint the thumb drawable
			// in its inactive state when the touch stops (because the
			// value has not apparently changed)
			invalidate();
			break;
		}

		case MotionEvent.ACTION_CANCEL: {
			onStopTrackingTouch();
			setPressed(false);
			invalidate(); // see above explanation
			break;
		}

		default:
			break;
		}
		return true;
	}

	//        
	private void trackTouchEvent(MotionEvent event) {
		final int height = getHeight();
		final int available = height - getPaddingBottom() - getPaddingTop();
		int Y = (int) event.getY();
		float scale;
		float progress = 0;
		if (Y > height - getPaddingBottom()) {
			scale = 0.0f;
		} else if (Y < getPaddingTop()) {
			scale = 1.0f;
		} else {
			scale = (float) (height - getPaddingBottom() - Y) / (float) available;
		}
		final int max = getMax();
		progress = scale * max;
		setProgress((int) progress);
	}

	private void attemptClaimDrag() {
		if (getParent() != null) {
			getParent().requestDisallowInterceptTouchEvent(true);
		}
	}
}

保存しておけば、必要な学生は直接持って行ってもいいです.
2014-04-02
使用する皆さんは、onProgressRefresh()という方法は、混同されないようにしなければならないことに注意してください.この方法は,実際には親のメソッドを書き換える役割を果たしているが,@Overrideを加えると誤報になるので注意してください.