Question

我想将我的文本（tp-TextPaint）置于我在画布上绘制的矩形语音气泡图中。有谁有想法吗？我已经使用canvas.drawText（）实现了它，但我希望使用staticLayout来实现它，以便在调整画布宽度和高度时调整文本大小。以下是我的代码。

@Override
protected void onDraw(Canvas canvas) {
    // TODO Auto-generated method stub
    super.onDraw(canvas);
    drawPath.reset();

    drawPath.moveTo(0, 0);
    drawPath.lineTo(getWidth(), 0);
    drawPath.lineTo(getWidth(), 100);
    drawPath.lineTo((getWidth()/2) +20, 100);
    drawPath.lineTo(getWidth()/2, 140);
    drawPath.lineTo((getWidth()/2)-20, 100);
    drawPath.lineTo(0, 100);
    drawPath.lineTo(0, 0);

    canvas.drawPath(drawPath, drawPaint);

    TextPaint tp = new TextPaint();
    tp.setColor(Color.BLACK);
    tp.setTextSize(25);
    tp.setAntiAlias(true);


    StaticLayout sl = new StaticLayout("" + s, tp, getWidth(),Alignment.ALIGN_CENTER, 1.0f, 0.0f, true);
     sl.draw(canvas);

     }

Answer 1

这可能对你有帮助......

public static void drawText(Canvas canvas, Paint paint, String text) {
    Rect bounds = new Rect();
    paint.getTextBounds(text, 0, text.length(), bounds);
    int x = (canvas.getWidth() / 2) - (bounds.width() / 2);
    int y = (canvas.getHeight() / 2) - (bounds.height() / 2);
    canvas.drawText(text, x, y, paint);
}

Answer 2

试一试：

int xPos = (canvas.getWidth() / 2);
int yPos = (int) ((canvas.getHeight() / 2) - ((textPaint.descent() + textPaint.ascent()) / 2)) ; 
//((textPaint.descent() + textPaint.ascent()) / 2) is the distance from the baseline to the center.
canvas.drawText("Hello", xPos, yPos, textPaint);

Canvas Android中的中心文字

2 个答案: