java - 黑线意外出现在错误的位置

我使用画布创建了该图形，但是这样做之后，由于某种原因，我讨厌地在最左边的红色矩形和包含数字1的灰色矩形之间出现了一条黑线。该怎么做才能摆脱该线？

public class RectangleTextView extends View {
    private final Paint mBackPaint = new Paint();
    private final Paint mRedPaint = new Paint();

    private TextPaint mTextPaint;

    public RectangleTextView(Context context, AttributeSet attrs) {
        super(context, attrs);
        int valueInPx = (int) TypedValue.applyDimension(TypedValue.COMPLEX_UNIT_DIP, 1, getResources().getDisplayMetrics());
        int valueInSp = (int) TypedValue.applyDimension(TypedValue.COMPLEX_UNIT_SP, 20, getResources().getDisplayMetrics());

        mRedPaint.setColor(Color.RED);

        mBackPaint.setAntiAlias(false);
        mBackPaint.setColor(Color.BLACK);
        mBackPaint.setStrokeWidth(valueInPx);
        mBackPaint.setStyle(Paint.Style.STROKE);

        mTextPaint = new TextPaint(TextPaint.ANTI_ALIAS_FLAG);
        mTextPaint.setColor(Color.BLACK);
        mTextPaint.setTextAlign(Paint.Align.CENTER);
        mTextPaint.setTextSize(valueInSp);

        String pageTitle = getResources().getString(R.string.app_name);
    }

    @Override protected void onDraw(Canvas canvas) {
        super.onDraw(canvas);
        if (getWidth() == 0)
            return;

        //draw end rectangles
        int mSideRectWidth = 10;
        canvas.drawRect(0, 0, mSideRectWidth, getHeight(), mRedPaint); //draw left end rectangle
        canvas.drawRect(getWidth() - mSideRectWidth, 0, getWidth(), getHeight(), mRedPaint); //draw right end rectangle

        //draw grey boxes
        setBackgroundColor(Color.parseColor("#808080"));
        int boxWidth = (getWidth() - mSideRectWidth) / 7;


        for (int i = 0; i < 7; i++) {
            //draw black lines
            canvas.drawLine(mSideRectWidth + boxWidth * i, 0, mSideRectWidth + boxWidth * i, getHeight(), mBackPaint);

            //draw text views
            canvas.drawText(Integer.toString(i + 1), (i * boxWidth) + (boxWidth / 2), ((canvas.getHeight() / 2) - ((mTextPaint.descent() + mTextPaint.ascent()) / 2)), mTextPaint);
        }
    }
}

最佳答案

您不希望出现“ 1st”黑线，因此跳过“ 0”索引。

    for (int i = 1; i < 7; i++) {
        //draw black lines
        canvas.drawLine(mSideRectWidth + boxWidth * i, 0, (mSideRectWidth/2) + boxWidth * i, getHeight(), mBackPaint);
    }

    for (int i = 0; i < 7; i++) {
        //draw text views
        canvas.drawText(Integer.toString(i + 1), (i * boxWidth) + (boxWidth / 2), ((canvas.getHeight() / 2) - ((mTextPaint.descent() + mTextPaint.ascent()) / 2)), mTextPaint);
    }

那应该有帮助。

编辑：此外，您没有考虑左侧的红线，因此您将不会“居中”（由于每侧都有一条线，您只需要将其减少1/2）即可：

    for (int i = 1; i < 7; i++) {
        //draw black lines
        canvas.drawLine((mSideRectWidth/2) + boxWidth * i, 0, mSideRectWidth + boxWidth * i, getHeight(), mBackPaint);
    }

    for (int i = 0; i < 7; i++) {
        //draw text views
        canvas.drawText(Integer.toString(i + 1), (mSideRectWidth / 2) + (i * boxWidth) + (boxWidth / 2), ((canvas.getHeight() / 2) - ((mTextPaint.descent() + mTextPaint.ascent()) / 2)), mTextPaint);
    }