canvas.drawText问题

Question

我正在使用canvas.drawtext在我的安卓自定义视图中绘制文本。我需要改变背部的颜色，并希望文本右对齐。例如，我想以10、10、100、20的颜色打印文本，颜色为黄色，文本颜色为红色，并右对齐。我该怎么做呢？

Answer 1

public void onDraw(Canvas c) {
    String text = "red right-aligned text";
    Paint paint = new Paint();
    paint.setStyle(Paint.Style.FILL_AND_STROKE);

    int rectX = 10;
    int rectY = 10;
    int rectWidth = 100;
    int rectHeight = 20;
    float textWidth = paint.measureText(text); // measureText method of Paint

    paint.setColor(Color.YELLOW);
    c.drawRect(rectX, rectY, rectX + rectWidth, rectY + rectHeight, paint);

    paint.setColor(Color.RED);
    c.drawText(text, rectX + rectWidth - textWidth, rectY, paint);
}

Answer 2

gc.setBackground(...)
gc.fillRectangle(...)
gc.setForeground(...)
gc.drawText(...)