如何設置筆觸顏色以在畫布上繪制矩形？

Question

我想繪制一個圓形矩形，其筆划為藍色，填充為紅色，但我在Paint類中找不到設置筆觸顏色的方法。 我怎樣才能做到這一點？

    mCanvas.drawColor(mBackgroundColor, PorterDuff.Mode.CLEAR);
    mCanvas.setDrawFilter(mPaintFlagsDrawFilter);

    mPaint.setStyle(Paint.Style.FILL_AND_STROKE);
    mPaint.setColor(Color.RED);
    mPaint.setStrokeWidth(2);
    mPaint.setStrokeCap(Paint.Cap.ROUND);
    mRectF.set(0, 0, mWidth, mHeight);
    mCanvas.drawRoundRect(mRectF, 10, 10, mPaint);

Answer 1

油漆一次只允許一種顏色。

mCanvas.drawColor(mBackgroundColor, PorterDuff.Mode.CLEAR);
mCanvas.setDrawFilter(mPaintFlagsDrawFilter);

mFillPaint.setStyle(Paint.Style.FILL);
mFillPaint.setColor(Color.RED);
mStrokePaint.setStyle(Paint.Style.STROKE);
mStrokePaint.setColor(Color.BLUE);
mStrokePaint.setStrokeWidth(2);
mStrokePaint.setStrokeCap(Paint.Cap.ROUND);
mRectF.set(0, 0, mWidth, mHeight);
mCanvas.drawRoundRect(mRectF, 10, 10, mFillPaint);
mCanvas.drawRoundRect(mRectF, 10, 10, mStrokePaint);

如果您發現圓角矩形看起來不正確，則可能會在視圖的邊界處剪切。 調整RectF以允許StrokeWidth的一半：

mRectF.set(1, 1, mWidth - 1, mHeight - 1);